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DENODO ITPILOT 4.5 USER MANUAL

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1. e Database this tab displays all information stored in the maintenance database It is divided in two additional tabs which are shown with the symbol O i Test Queries Database ma E het Wrapper Extractors i Valid Data Oo Outdated Data Ki itpilot webmail MainExtractor 4 queryis with 84 row s O query s with 0 rows He Figure 35 Database Tab o Tab 1 information about the wrappers that are stored in the maintenance database Wrapper database and wrapper name O o Extractors name of the wrapper s Extractor components o Valid Data number of queries and updated not outdated results as stored in the maintenance database for that wrapper o Outdated Data number of queries and outdated results stored in the maintenance database for that wrapper o Tests number of tests stored in the maintenance database for that wrapper o ab 2 information about the wrapper that is selected in the selection box Maintenance Server Graphical Configuration and Monitoring tool 38 I i i UO denodo technologies ITPilot 4 5 User Manual Tests Queries Database Graphs Ruleset G itpilot webmail ho ft Wrapper E Query Date Rows Status ID itpilot webmail LOGIN demos PASSWORD DeMo 04 2008 11 04 17 19 25 21 vr 3 itpilot webmail DetailPageExtractor LOGIN demos PASSWORD DeMo 04 2008 11 04 17 19 23 21 g itpilot webmail MainPageExtractor LOGIN demos PASSWORD DeMo 04 2008 11 04 17
2. 33 J denodo technologies ITPilot 4 5 17 Denodo HTML Wrapper Maintenance 2 0 File Actions Help Pan gi i d ar Pi J Stop Synchronize Reset Regenerate Clear Exit Tests Queries Database Graphs Ruleset bet Wrapper O Test A Date U Score 21 Passed Figure 30 Maintenance Graphical Too User Manual Message spe 19 It is possible to enable the automatic regeneration process of the maintenance Server This action Is useful when no wrapper regeneration is required but just sending an email alert configured in the Email Configuration Parameters area of the ITPilot Web Administration tool see section 5 4 2 2 when any of the wrapper rules is activated The automatic regeneration can be enabled and disabled for all wrappers but not in an individual manner To disable the automatic regeneration for all wrappers residing in the server the steps are the following 1 Stop the maintenance server if it is running 2 Edit the file lt DENODO_PLATFORM gt conf maintenance MaintenanceConfiguration xml with a text editor the use of notepad in MS Windows systems is not recommended e Search and replace the string lt handler enabled true name Regeneration gt by lt handler enabled false name Regeneration gt e Save the file 3 Start the maintenance Server Maintenance Server Graphical Configuration and Monitoring tool 34 J denodo technologies ITPilot 4 5 6 1 2 An overview of the Graphi
3. Manual ITPilot Generaci n Er Dt wee Pool Brows ESSI Si Wrappers server o ______ gt and execution Admin tool Administrati Figure 2 TPilot Environments and Components 1 1 1 Administration Tool The execution environment configuration is managed via the ITPilot Administration tool This is a Web application that can be deployed in Web containers and that meets servlet and JSP specifications and communicates with the ITPilot servers wrapper server browser pool and maintenance server to configure their execution settings 1 1 2 Generation Environment This environment includes the group of components necessary for creating wrappers from DEXTL data extraction specifications generator see DEXTL IGENER and NSEOL navigation sequences see NSEOL GENER The components It uses are as follows Generation Tools tools for generating data extraction specifications and navigation sequences are graphical applications that allow a non technical user to create Web wrappers For more information we recommend reading the Denodo ITPilot Generation Environment Manual GENER Generation Browser Pool this environment uses a browser pool internally to check the navigation sequences and final specification PDF Conversion Server this environment makes use of an embedded PDF conversion Server which transforms PDF documents to HTML based on PDFBOX and is automatically started This server will be
4. as the wrapper server or in a separate machine in general this depends on the maximum number of browsers that can be open during system execution 2 3 DISTRIBUTION OF THE MAINTENANCE ENVIRONMENT This environment should be executed together with the execution environment and allows IT Pilot to monitor changes in sources from which data are extracted and automatically regenerate wrappers as required see section 1 1 4 The maintenance server which uses a browser pool can be executed in the same machine as the wrapper server although it is a distributed component whereby we recommend that it be installed in another machine Figure 5 shows the relationship between this environment and the execution environment Distribution of Environments 6 ly i TT d denodo technologies ITPilot 4 5 User Manual Figure 5 Relationship Between Execution and Maintenance Environments The basic process of the maintenance server is the following when executing a query against a wrapper it is sent along with the produced results to the maintenance module When this module receives the query and associated results they will be stored in a relational database and at the same time the necessary tests will be executed in order to determine whether that wrapper has changed or not Each test configurable by the user see section 5 4 is executed by handing that query plus its results as parameters Each test returns a result between 0 and 100 where 0 me
5. executions which are taken into account in this test The value 0 indicates the last execution performed 1 is the one before the last and so on Values each test execution returns an integer value between 0 and 100 closer to 0 when the results are worse with regard to the performed test This parameter determines the range of values which would activate the test Let us now consider the example of Figure 26 In the first rule their entries mean the following First entry It uses the test ResultsNumber It will get activated when the returned percentage value by any query is below 50 in at least one amount 1 of the last ten executions except for the last one interval 1 10 second entry it will be activated when the result for the ResultsNumber test is O in the last execution of Web Administration Tool 30 ly i Hr d denodo technologies ITPilot 4 5 User Manual any query Third entry it will get activated when the result for the Pagination test is 0 in the last execution of any query Rule for all wrappers Test amount interval values Edit Delete Test amount interval values Edit Delete Test amount interval values Edit Delete Add Item Edit Delete Rule for all wrappers Test amount interval values Edit Delete Figure 26 Edition of Verification Rules 5 4 3 Selecting location for the associated browser pool During wrapper maintenance the server re
6. frequently faced with the problem of results being returned in HTML which is a tag language defined for visual display by users that never publishes metadata of any type on the structure and or semantics of the results generated Neither does it structurally differentiate navigation elements menus graphic panels and data useful to the user The problem of extracting the relevant data contained in HTML pages thus also arises Example Look at this example of an Internet bookshop with a search form as shown in Figure 1 The form obliges users to specify a value for the attribute TITLE and gives them the option of entering a value for the attribute AUTHOR and for the attribute FORMAT restricting a group of values The bookshop returns a result list with data on TITLE AUTHOR FORMAT PUBLISHER and PRICE Introduction 1 ly TIET 3O denodo tech ogies ITPilot 4 5 User Manual Title Obligatory Author 63 Format Any format Hardback Softback Pocket Figure 1 Bookshop form This case summarizes the difficulties an application faces when attempting to extract structured data from Web environments accessing Web sources navigating through transactional environments option selecting and finally extracting data from semi structured data Denodo ITPilot is the Denodo Technologies solution for easy access to and structuring of datasets on the Web this process Involves constructing an abstraction from the specific Web s
7. in the ITPilot installation path in samples itpilot itp clients scripts click on Browse and then on Load VOL see Figure 19 The wrapper will appear in the list of wrappers as shown in Figure 20 Save Changes Create Web Service Load YOL File scripts webrnailuql Examinar Figure 19 Loading Wrappers Using VOL Files ITRilot E Online Documentation Log Quit Wrapper Server Browser Pool Maintenance Add Server Wrapper Server Name Remove Connect Edit Start Stop Refresh EI LOcALSERVER localhost 9999 running E ry E Selected Database itpilot h Refresh List of Wrappers Mame Maintenance Export Executon Delete google Enable S O E webmail Enable 5 O E AII None All All Figure 20 List of Wrappers with Loaded Webmail You can then generate the Web service by clicking on the Create Web Service button on the execution server tab after which a page will appear as shown in Figure 21 from where the Web Service to be generated is described Web Service Name name to be given to this service For example webmailws Wrapper Service URL this is the URL of the wrapper server where the wrapper is deployed to be used to access the wrapper through the Web Service The default value is localhost 9999 itpilot where localhost 9999 is the domain and port where the run server resides and ttpilot is the database where the wrapper is deployed Login Password login and p
8. iso639 txt U2SE Java 2 Standard Edition http java sun com j2se LIN Linux Fedora Core 3 Distribution http www fedora orq LOG4J The Log4j Project Apache Software Foundation http logging apache org log4j docs MYSQL MySQL Open Source Database http www mysql com NSEOL Denodo NSEOL 4 5 Manual Denodo Technologies 2008 ORA Oracle 9 http www oracle com PDFBOX PDF document management Java Library PDFBox http www pdfbox orq POST PostgreSQL Open Source Database http postgresgl org SUN Sun Microsystems Atto java sun com TOM Jakarta Tomcat 4 x x servlet and JSP container htto jakarta apache org tomcat VOL Denodo Virtual DataPort 4 5 Advanced VOL Guide Denodo Technologies 2008 WIND Microsoft Windows Operating Systems http www microsoft com References 41
9. rules from the web administration tool is highly recommended this action can also be performed from the monitoring tool La 1 gt Addition of a new rule it creates a new rule for all wrappers in the database or for a specific one Maintenance Server Graphical Configuration and Monitoring tool 36 J denodo technologies ITPilot 4 5 User Manual 7 Lal Addition of a new test It creates a new test in the selected rule Lo Rule deletion it deletes the selected rule without deletion confirmation After deleting the rule the al button Rule storage must be pressed to confirm changes 4 Return to Previous State Stored Rules it goes back to the previous stored state getting rid of the latest changes 5 T hule storage it stores the latest changes j to the right of each test Test deletion after deleting the test the T button Rule storage must be pressed to confirm changes 6 1 4 Monitoring the Maintainable Wrappers The maintenance graphical tool lets users monitor the execution of the maintainable wrappers that have been loaded into the wrapper server This can be achieved by using the following tabs e Tests this tab displays information about the tests that have been executed and their results The information available is the following Tests Queries Database Graphs Ruleset bor Wrapper i Test E Date Wi Score a Passed gt Message itpilot webmail ZeroResu
10. to be started up in the machines in which they reside 4 1 STARTING UP THE ADMINISTRATION TOOL The administration tool can be started from the Denodo Platform Control Center see the Denodo Platform Installation Guide DENINST or by using the following scripts available in the DENODO HOME bin e itpilot webadmin startup starts up the administration tool e itpilot webadmin shutdown stops the administration tool Once the application has been properly displayed the administration tool will be available in http domain 9090 webadmin denodo itpilot admin 42 STARTING UP THE BROWSER POOL The browser pool can be started from the Denodo Platform Control Center see the Denodo Platform Installation Guide DENINST or by using the following scripts available in the path DENODO_HOME bin e browserpool_startup starts up the browser pool e browserpool_shutdown stops the remote pool and all the browsers contained in It 4 3 STARTING UP THE WRAPPER SERVER The execution server can be started from the Denodo Platform Control Center see the Denodo Platform Installation Guide DENINST or by using the following scripts available in the path DENODO HOME bin e vqlserver_startup starts up the Wrapper Server e valserver_ shutdown stops the Wrapper Server e vqlserver withthe options startup and shutdown 4 4 STARTING UP THE MAINTENANCE SERVER The maintenance server can be started from the Denodo Platform Control Center see the
11. 19 22 21 vr Figure 36 Information about the selected wrapper o Wrapper database wrapper and Extractor component name o Query query used for executing the wrapper o Date execution date o Row number of results for this query execution o Status status of the execution correct incorrect o ID execution identifier o View button to access detailed information It will open a new tab showing internal information about this identifier e Graphs this tab shows different graphs from the wrappers and the queries that have been executed in a specific timeframe The choice of which wrappers and tests are to be supervised must be done before the wrapper starts being executed aiis Graph Time amp itpilot webmail LJ 100 oh 6h 12h 18h id ER y Continuous Graph Time 80 N Available Wrappers 7D p 60 2 S s50 cn 40 30 FP i itpilot webmail 20 4 m 10 Available Tests ee i 13 40 40 13 40 50 13 41 00 13 41 10 13 41 20 13 41 30 13 41 40 zeroresults c Time resultsnumber Figure 37 Graphs Tab Maintenance Server Graphical Configuration and Monitoring tool 39 JF Tr UO denodo technologies ITPilot 4 5 User Manual 7 ANNEX A DEPRECATED FEATURES 7 1 ACTIVEX CONTROL FOR AUTOMATIC BROWSING SEQUENCE RUNNING IN CLIENT BROWSERS ITPilot includes an ActiveX control that enables a Web server to provoke the automatic running of any browsing sequences in a client browser provided th
12. Denodo Platform Installation Guide DENINST or by using the following scripts available in the path DENODO HOME bin e maintenance startup starts up the Maintenance Server Execution 9 ly i Hr lt D denodo technologies ITPilot 4 5 User Manual e maintenance _ shutdown stops the Maintenance Server 45 STARTING UP THE MAINTENACE GRAPHICAL TOOL The maintenance graphical tool described in detail in section 6 can be started by using the maintenanceGUI_startup scripts available in the path lt DENODO_HOME gt bin 46 STARTING UP THE PDF CONVERSION SERVER The PDF conversion server can be started from the Denodo Platform Control Center see the Denodo Platform Installation Guide DENINST or by using the script PAfConversionsServer exe which resides in the DENODO_HOME bin directory and that allows the server to be started up and stopped The server follows this format PDFConversionsServer start shutdown conf confFile where start means that the conversion server must be started stop means that it must be stopped and confFile as the server configuration file By default it can be found at DENODO_HOME conf iebrowser with the name IEBrowserConfiguration properties Execution 10 J denodo technologies ITPilot 4 5 User Manual 5 WEB ADMINISTRATION TOOL The ITPilot administration tool allows the execution and maintenance environments to be managed in a simple and uniform way This is a Web application
13. I I m denodo technologies 01 DENODO ITPILOT 4 5 USER MANUAL Update Nov 18 2009 530 Lytton Avenue Suite 302 C Alejandro Rodriguez 32 Palo Alto CA 94301 USA 28039 MADRID Phone 650 566 8833 Phone 34 912 77 58 55 Fax 650 566 8836 Fax 34 912 77 58 60 www denodo com I I D denodo technologies 01 NOTE This document is confidential and is the property of denodo technologies hereinafter denodo No part of the document may be copied photographed transmitted electronically stored in a document management system or reproduced by any other means without prior written permission from denodo copyright 2008 This document may not be reproduced in total or in part without written permission from denodo technologies y denodo technologies ITPilot 4 5 User Manual INDEX PREFA GE cra I o e E WHO SHOULD USE THIS DOCUMENT I SUMMARY OF CONTENTS cuina a I 1 INTRODUCTION circa 1 1 1 DENODO ITPILOT ENVIRONMENTS cccsccssssssessssesssssseeeseseseesesaeseseeassesaesesesasseseraeeesesseseeans 2 FN 3 112 FEN 3 MER an 4 VZ a 4 2 DISTRIBUTION OF ENVIRONMENTS rsornorornenornrnesvrnenornrnenvrnenesnrnenernenennrsrnesnenennrsrnesnenennssnnesnenennsnnnesnenennnnnn 5 2 1 DISTRIBUTION OF THE GENERATION ENVIRONMENT 5 2 2 DISTRIBUTION OF THE EXECUTION ENVIRONMENT nnvnnenornrnosvrnenernvnvnernenennvsrnernenennvnrnesnenennnnn 5 2 3 DISTRIBUTION OF THE MAINTENANCE ENVIRONME
14. Introduction 3 ly i Hr lt D denodo technologies ITPilot 4 5 User Manual used by the Generation Tool to perform the required conversions The execution time conversions are performed by the Execution Environment s PDF conversion server which is a separate component In addition and although it does not belong to this environment per se generator tools may need to store the wrapper created The Wrapper Server in the Execution Environment is used to do this see next section 1 1 3 1 1 3 Execution Environment This is the continued operation environment in which the user can use previously created wrappers to launch queries on isolated sources This use may be direct through an API or publishing the wrapper as a Web Service or through other products such as Denodo Virtual DataPort with which Denodo ITPilot is fully integrated The components that make up this environment are as follows Wrapper Server this is the component responsible for storing wrappers for accessing These include a remote interface for statement execution Browser Pool when a wrapper is executed a browser type can be selected lEBrowser automatic navigation module based on Microsoft Internet Explorer IE Firefox FRFOX or a Denodo browser based in HTTP as an access method In this case the wrapper server uses the browser pool to minimize the time required to create browser instances This pool can be configured from the administration tool PDF Conversio
15. Mandatory text next to the input field After filling the input values and selecting the output fields by clicking the Execute button the administration tool will start the execution of the selected query To achieve this it communicates with the wrapper server and invokes the typed query for the specific wrapper this is communicated to the appropriate data source The results properly structured are shown in the execution window result list in an asynchronous way the individual rows will appear in the results table as soon as they are avallable ITPilot a Online Documentation D Log Out Wrapper Server Browser Pool Maintenance Execution of wrapper webmail W SUBJECT J SENDER E Loen Mandatory 7 MESSAGESIZE W SIZE EJ passworp __ Mandatory Export results to CSV file Include headers Separator S Comma Semicolon White Space Tabulation Mt Other Execute Figure 16 Wrapper Execution Page Web Administration Tool 22 F i TERT i UO denodo technologies ITPilot 4 5 User Manual 5 3 2 2 Exporting results as a CSV formatted file Before pressing the Execute button the results of the execution can be configured to be stored in a CSV Comma separated Value type file where Denodo ITPilot allows the definition of the character used as a separator between columns When the execution is finished the browser will show a standard download dialog to allow to save the resu
16. Manual 6 MAINTENANCE SERVER GRAPHICAL CONFIGURATION AND MONITORING TOOL Denodo provides a graphical configuration and monitoring tool that can be used in production time to monitor the actions of the maintenance Server once the wrapper Server is running The remainder of this chapter is divided in two sections Configuration section that explains how to configure the different rules and tests for each wrapper loaded in the execution Server as it was already explained in section 5 4 2 5 and the different parameters of the graphical tool Howto monitor the wrappers that have been configured as maintainable in the wrapper server 6 1 1 Configuration of the wrappers to be maintained Alter following the steps described in section 4 5 the graphical tool will be started Please remember that the maintenance server must be already running Figure 29 shows the window that appears right after starting T Maintenance Server 5 License Validation Connecting to JDBC database server Connecting to wrapper server Initializing EXTRACTION SERVER module Initializing VERIFICATION module gt Initializing QUERY SELECTION module Initializing TEST STORAGE module Initializing REGENERATION module Initializing CONFIGURATION module Initializing CLEANING DAEMON module Initializing SHUTDOWN SERVER module 0000004544 Figure 29 Maintenance Graphical Tool Loading Window Maintenance Server Graphical Configuration and Monitoring tool
17. NT 6 3 INSTALLATION AND INITIAL CONFIGURATION 8 4 Bs Nal 9 4 1 STARTING UP THE ADMINISTRATION TOOL 9 4 2 STARTING UP THE BROWSER POOL rsrnvnnrnonnrnrnonnrnennvnrnesvrnennnnrnesvnnenennrnesernenennrsenennenennvsrnesnenennsnn 9 4 3 STARTING UP THE WRAPPER SERVER 9 4 4 STARTING UP THE MAINTENANCE SERVER 9 4 5 STARTING UP THE MAINTENACE GRAPHICAL TOOL 10 4 6 STARTING UP THE PDF CONVERSION SERVER c0coocooccococoncoccccccccccccccoconoccaconoocanonaos 10 5 WEB ADMINISTRATION TOOL 11 5 1 STARTING UP THE SERVERS 11 5 2 CONFIGURING THE BROWSER POOL ornrnornrnonnrnrnonnrnvnnvnrnvrvrnennrnrnesvrnenennrsenernenennrsenesnenennsnrnesnenenn 11 5 2 1 Identification of pool and assignment of POFES oococicconocicccoconocninnoncnnonenconanoncnnononnanoncnnenonoanoncnnenincanos 13 5 2 2 Browser Download and Cache Parameter Configuration 15 BL NNN 16 5 2 4 Pool size and policy for reusing browsers 17 9253 III A 19 5 2 6 Firefox Installation Base Path Configuration 19 5 2 7 Executing and stopping the Browser Pool venne 20 5 3 CONFIGURATION OF THE WRAPPER SERVEPR rnrnnrnonornrnovrnenonnrnenvrnenennvnenernenennvnrnernenennrnrnesnenenn 20 5 31 Access to Wrapper IE Earn ai dino 20 5 3 2 List of VINNES cenit 21 5 3 3 Selecting location of the associated browser pool 23 5 3 4 AS ttti akarak nrnr nrar EnE nEn E nna nuana r
18. TTP configuration parameters section At generation time a user can choose if an independent pool will be used to run the HT TPBrowser clients or if they will be executed in the internal pool of the wrapper server please see GENER The parameters are basically the same ones that were described in section 5 2 Web Administration Tool 23 eH denodo technologies Pilot 4 5 User Manual n HTTP configuration parameters La HTTP Configuration vax rer timeout i DOWNLOAD Download Controls Cache Controls E NOSCRIPT E NOJAVA E NOACTIVEX E NOCACHE Maximum number of cached JavaScript files 150 Proxy with Authentication pad a LOGIN DOMAIN PASSWORD HTTP Pool Size and Reutilization Policy MAX POOLSIZE 250 REUSABLE BROWSERS E REUSABLE MIN POOLSIZE ASSIGNMENT STRATEGY SimplePoolAssignmentStrategy MAX BROWSER TTL PDF Conversion Configuration a Converter server port Acrobat Prof directory Figure 18 Configuration parameters of the http client in the Wrapper Server 5 3 6 Password change The button Change password lets the user change the access password of the wrapper server which the user is currently connected to 5 3 7 Loading new wrappers from VOL files Although wrappers are normally exported from the specifications generation tool to the wrapper server VOL files containing the definition of a wrapper can also be loaded manually from the administration tool for more information about VOL p
19. Wrapper ana 31 Maintenance Graphical Tool Loading WiIndoW 33 Melde ads Graphical nn EE 34 Main elements of the Maintenance Graphical Tool ronerrrorvrrsvrrrvvrveervrrevervrvesvrserersrrererserevsrverersenen 35 Rule Configuration in the Maintenance Graphic TOO ooooooocociononocicconinnononinnancnnonencnranninnoninoo 36 SE A EA 37 Queries Tab 38 CAN EEE EEE AE 38 Information about the selected wrapper 39 CP 39 F a E d denodo technologies ITPilot 4 5 User Manual PREFACE SCOPE This document serves as introduction administration and user guide of Denodo ITPilot WHO SHOULD USE THIS DOCUMENT This document is aimed at administrators that want to install the software and to use the Denodo ITPilot administration tool SUMMARY OF CONTENTS More specifically this document describes e An introduction to ITPilot e The different functioning environments of ITPilot e The configuration of each of the Denodo ITPilot components in the execution and maintenance environments Preface I ly Ter lt D denodo technologies ITPilot 4 5 User Manual 1 INTRODUCTION Most data available on the World Wide Web hereinafter Web can be obtained only by means that are friendly for Web users but not useful for automatic and mechanical processing by software applications Nowadays many Web sites offer ad hoc query interfaces with forms that return the data required in list
20. and only if the Local Path field has been properly completed when configuring the pool Of course any number of pools can be added as needed although the architecture considerations in section 2 of this document should be taken into account Once the pool has been configured connect it by clicking on the Connect button If the connection is successful the parameter set that can be configured by the user will appear in the window below the server details The existing configuration parameters can be divided into several groups each of which can be accessed in the administration tool panel pool global parameters lEBrowser configuration parameters Firefox configuration parameters and Denodo HT TPBrowser configuration parameters The global parameters include parameter groups for identification of the pool and system port assignment behavior of the browser pool and HTML conversion configuration The parameters for each of the three browser types include the following groups of parameters browser configuration support for proxies with authentication pool size and browser assignment policies and finally initialization parameters At last the Firefox browsers include an additional parameter group to set the Firefox installation to be used The following subsections deal with each of these parameter groups respectively The text indicates whenever the available options vary according to the browser type 5 2 1 Identificati
21. ans that the condition is not accomplished at all and 100 that is absolutely successful which is stored in a result manager Next an evaluating process is launched which determines if the wrapper has changed in terms of the results of the tests This evaluator needs both the results from the last tests and the evaluation rules If the wrapper changes the maintenance system selects the subset of all these stored queries which will be used by regenerating the wrapper When the query results are saved in the database an expiry time is assigned to each of them The expired results are deleted on a period basis The next section describes the installation steps for each of the components Distribution of Environments 7 i i A d denodo technologies ITPilot 4 5 User Manual 3 INSTALLATION AND INITIAL CONFIGURATION The Denodo Platform Installation Guide DENINST provides all information required to install Denodo ITPilot including hardware and software minimum requirements and instructions to use the installation tool and for the initial configuration of the system Installation and Initial Configuration ly i Hr d denodo technologies ITPilot 4 5 User Manual 4 EXECUTION Once the installation process has terminated the servers are ready to run Each server found on the same machine as the administration tool can be started up directly from the Web tool itself as dealt with in section 5 1 If this is not the case they have
22. arere rene nerne ne nn 23 5 3 5 Configuration of HT TPClient with no Browser Pool 23 E NNN 24 5 3 7 Loading new wrappers from VIL MES Luacgsmagnmenenindununm gre iiiunddnnetktbvise 24 So LEI Siero 24 5 4 CONFIGURING THE MAINTENANCE SERVER 26 J denodo tech Pilot 4 5 User Manual 5 4 1 Access to the Maintenance Server 27 EZ ATT Nei 21 5 4 3 Selecting location for the associated browser pool dl 5 4 4 Selecting location of wrapper SErver 31 5 4 5 Capabilities and limitations of the Maintenance Server 31 6 MAINTENANCE SERVER GRAPHICAL CONFIGURATION AND MONITORING TOOL 33 6 1 1 Configuration of the wrappers to be maintained 33 6 1 2 An overview OF the Graphical Tool aia aii 35 6 1 3 Configuration of the Maintenance Environment oococccionociciococicconinnoneninnenoncnnononnaninconenonnnnoncnninincanos 36 6 1 4 Monitoring the Maintainable VWVTapperS occooococcononiccconenccccnconencncnnoncnnncononconcnnonoononnononnnnconencaninnos 37 7 ANNEX A DEPRECATED FEATURES nrnornonornrnoevenenovnrnosvrnenornrnesvrnenernrnenernenennrnenernenennrsenesnenennsnrnesnenennsnnnener 40 7 1 ACTIVEX CONTROL FOR AUTOMATIC BROWSING SEQUENCE RUNNING IN CLIENT OA VS Oe sons 40 MENN NN 41 I i i eH denodo technologies 1 FIGURES Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Fig
23. assword to access ITPilot In this case and by default admin admin Query Timeout maximum waiting time for a query result left blank to take the default value ChunkTimeout maximum waiting time between two consecutive results also left blank ChunkSize chunk size for each operation also left blank Web Service Style Web Service style to generate RPC or DOCUMENT Some Web Service consuming applications may require one specific style Web Administration Tool 25 Il i i i i lt D denodo technologies ITPilot 4 5 User Manual Wrapper Server Browser Pool Maintenance itpilot Web Service configuration parameters Web Service Name TTD Wrapper server URL Login Password E E DSSS i ES Dl RPC Web Service style w Document Add Operation Wrapper Name OBL Operation Name OPT Operation Name OPT Fields DI webmail A All None Create Web Service Create WSDL Figure 21 Web Service Export Page Once the data describing access to the server have been configured the next step involves defining the Web service operations Denodo ITPilot allows to generate three operations per wrapper The first one will contain all the mandatory parameters those marked as searchable and mandatory attributes in the specification see GENER Where there are no mandatory parameters the query would be run without parameters the second one will additionally contain any searchable and optional attributes selected in t
24. at this browser has been configured to permit this type of action An example of using this function is a Web automation process such as automatic authentication in a Web application autologin This is carried out using an ActiveX control installed in the local machine from where a specific browsing action is to be run This function is extremely useful when some type of Web automation involving automatic browsing is required The operation is as follows the SegExeAX cab control is found in the activex itpilot path in the ITPilot distribution installation directory This control can either be saved in a Web server to be accessed via http or if the control is already recorded in the local system it can be accessed through the Windows register via its CLSID Once this action is complete Web sites can be created that enable automatic browsing through the addition of the following elements to the HTML code lt object CLASSID CLSID lt CLSID of component SegExeAX CODEBASE http lt access path to control gt SegExeAX cab version lt SegExeAX component version gt lt param name Sequence value NSEQL browse sequence gt The CLSID and SegExeAX component version can be found in the SegExeAX inf file in the SegExeAX cab component this can be opened from any unzip tool on the market as if it were a zipped file The browse sequence is specified in NSEOL language explained in detail in NSEOL A Microsoft Internet Explorer browse
25. books verifying the query and a Next link allows accessing the following interval In ITPilot this step is accomplished using a NEXT_INTERVAL_ITERATOR component The pages containing data records may contain outbound links to access detail pages for each record The info in that detail pages may need to be extracted In our example we may have a More info link associated to each book allowing to extract additional information about each book In ITPilot navigation to detail pages is usually accomplished using an EXTRACTOR SEQUENCE component that replaces the RECORD_SEQUENCE component of previous versions of ITPilot Finally for each data record extracted some post processing operations may be needed For instance in our example an arithmetic expression could be used to compute the final price of each book from the extracted attributes price and special discount Post processing operations are usually performed in ITPilot using components such as CONDITION EXPRESSION or RECORD_CONSTRUCTOR The only mandatory steps are 1 and 2 The other steps may be present or not The ITPilot wrapper generation tool includes a button which allows to automatically check if a wrapper verifies the restrictions imposed by the query wrapper model This does not imply that the wrapper can be successfully regenerated by the maintenance server The following section describes some of the existing additional constraints 5452 Additiona
26. cal Tool bed 5 le F o O Y UBO Ls w BO Connect Disconnect Exec Stop Synchronize Reset Regenerate Clear Exit bet Wrapper 2 Passed User Manual Message HEGE se o Figure 31 Main elements of the Maintenance Graphical Tool The main screen of the maintenance configuration and monitoring tool is divided in three main areas as shown in Figure 31 1 Menu The menu gives access to all functionalities of the administration tool e File o Close GUI o Exit Application e Actions o Enable maintenance server engine o Stop maintenance server o Wrapper server synchronization It executes a synchronization process with the wrapper Server o Database clean amp resynchronization it cleans a re synchronizes the maintenance database o Regenerate wrapper o Clear screen information e Help o About 2 Actions Buttons Maintenance Server Graphical Configuration and Monitoring tool 39 I i i i i d denodo technologies ITPilot 4 5 User Manual o Exec enables the maintenance server o Stop maintenance server o Synchronize o Reset cleans and re synchronizes the maintenance database o Regenerate the wrapper o Clear screen information o Exit 3 Main tabs this is the main area of the tool from where all information about maintainable wrappers can be configured and where all their rules can be configured and monitored this action is identical to the one offered in the Web Administration tool
27. ce Server Name Remove Connect Edit Start Stop Refresh LOCALSERVER localhost 7001 running E ry E Figure 22 Maintenance Administration Main Page The fields to be completed are as follows Name a name to identify this server Host address where it is found Port port where the server Is listening Local path optional to indicate that the server is local by adding the local path where the application is the user will be able to start up and stop the maintenance server from the graphical administration tool 5 4 2 Server Configuration Data Once the system has connected to the maintenance server either by clicking the tab or editing the access data as in the previous section the Web tool displays the server configuration data The following settings are available 5 4 2 1 Database parameters Provider database provider by default derby The possible values are derby mysql postgresql oracle When selecting a value sensible default values will be assigned to the rest of database parameters when applicable JDBC URL URL access to the Database for the JDBC driver by default jdbc derby maintenance User Password user and access password by default maintenance maintenance JDBC driver JDBC driver to be used by default org apache derby jdbc EmbeddedDriver If the driver is not distributed in the Denodo Platform it must be placed in the DENODO_HOME extensions thirdparty lib directory or Web Admi
28. e it is required that this product be installed o Acrobat Text uses the plain text conversion tool from the Adobe Acrobat Professional software from which ITPilot generates an HTML file it is required that this product is installed o PDF Box uses the PDFBox library PDFBOX bundled with the Denodo Platform to generate the HTML page Conversion Server port port where the conversion Server will be listening from Acrobat Prof Plugins Directory path where the Acrobat Professional plugins reside o In this case besides updating the directory in the administration tool the plugin DDEPdfToHtml api which resides in the lt DENODO HOME gt dll itpilot directory must be copied to the Acrobat plug_ins directory wherever Adobe Acrobat is installed Open Office Lib Directory directory where the Open Office class library can be found Open Office is used for the conversions from Microsoft Word and Microsoft Excel to HTML 5 2 2 Browser Download and Cache Parameter Configuration The parameters of this group can be configured for each of the three browser types The parameters are MAX_DOWNLOAD Indicates the maximum time a browser will wait to download a page in milliseconds OBJECT TIMEOUT Maximum time in milliseconds that a browser can be used outside the pool to deal with a wrapper request When this time lapses the browser is destroyed If the value of this parameter is less than 0 the browser can remain outside the po
29. e that wrapper must have been executed at least once while the Maintenance Server Is active Rules are composed by entries each of which is a check of the wrapper or wrappers When all of the entries are successfully checked that rule is activated The activation of any of the rules of a wrapper is enough to consider that the wrapper has changed Web Administration Tool 29 ly i Hr lt D denodo technologies ITPilot 4 5 User Manual Figure 26 shows an example in which a couple of rules have been defined the first one is composed by a set of three entries and the second rule by a single one Remember that every entry must be verified for the rule to be considered valid therefore validating the rule and proceeding to start the automatic maintenance Each entry in the rules consists of one of the tests described in the following paragraphs Each test will return a percentage value where 100 means the total accomplishment of the checking performed in that test ZeroHesults checks whether the source returns any result or not The intuition behind this test is that If a significant number of queries do not return any results a possible reason is a malfunctioning of the current wrapper This test will return 0 if there are no results and on the contrary 100 Compatibility checks the compatibility between the results and the query E g if title java is searched then the returned results should contain the word java
30. e one in Figure 15 From here the contents of the server can be managed as each server contains several databases the first thing that has to be selected is what database is going to be configured To change the database to inspect use the Selected Database combo box In case of having installed only Denodo ITPilot then there will be only one database available itpilot Once the selected database has been changed a list of wrappers contained in said database will be displayed The following sections explain the different settings that can be configured in the wrapper server After modifying any of the settings the Save Changes button must be clicked for the system to store all the changes The server must be restarted after a configuration change for the changes to become effective ITPilat a Online Documentation a Log Out Wrapper Server Browser Pool Maintenance Add Server Wrapper Server Name Remove Connect Edit Start Stop Refresh EI LOCALSERVER localhost 9999 running E rJ E G Selected Database itpilot Refresh List of Wrappers Name Maintenance Export Execution Delete Change webmail regenerate autodeploy 8 O E Disable i All None All All Figure 15 Wrapper server Connection 5 3 2 List of Wrappers Once the system has connected to the wrapper server the Web tool displays the list of wrappers contained in this server under the section List of wrappers Also the total number of wrapper
31. e xpi command from that same directory o Firefox does not provide a plugin uninstaller therefore if required it will have to be deleted manually as a directory in the firefox installation usually extensions 800 0371 e961 44b9 97a6 2d9d8b7147b8 Web Administration Tool 19 J denodo technologies Pilot 4 5 User Manual 5 2 7 Executing and stopping the Browser Pool The browser pool can be started and stopped from the Denodo Platform Control Center see the Denodo Platform Installation Guide DENINST or by using the Start Stop button in the browser pool configuration window This last option is only possible when it is located in the same machine in which the web administration tool is executed and the connection settings in the tool include the local path to the server It is also possible to start up or stop the pool using command line The following scripts are available for this in the path DENODO_HOME bin e browserpool_startup Starts the browser pool e browserpool shutdown Stops the remote pool and all the browsers contained in it It is important to remember that in order for changes to the pool configuration to take effect the pool has to be stopped and restarted 53 CONFIGURATION OF THE WRAPPER SERVER The wrapper server configuration window see Figure 14 allows the administrator to control all the configuration parameters of the stated server as well as monitor and execute different wrappers that are sto
32. en Internet Explorer is being used as browser e SILENT with this option activated none of the dialogs that the browser normally opens is displayed this includes JavaScript dialogs certificate warnings etc Figure 10 shows the administration tool page where to configure these parameters IEBrowser Configuration MAR 60000 OBJECT TIMEOUT soqoo00 7 GRAPHICAL Mae Dow MEDAD INTERFACE Download Controls a IMAGES a VIDEOS E BGSOUNDS a NOSCRIPT lv MOJAMA Iw MOACTIVERS fv MORDUNACTIVERS Cache Controls fv NOCACHE Iw NOPROAYCACHE Figure 10 Browser behaviour 5 2 3 Proxy with authentication If the Internet is accessed through a proxy with authentication the following parameters for all three browser types must be configured e PROXY LOGIN user login in the proxy e PROXY_PASSWORD user password in the proxy e PROXY DOMAIN Windows 2000 Windows domain Figure 11 shows the administration tool page where to configure these parameters Proxy with Authentication pasa LOGIN DOMAIN PASSWORD Figure 11 Proxy with Authentication Web Administration Tool 16 PE Saler lt D denodo technologies ITPilot 4 5 User Manual NOTE the proxy server parameters must be correctly defined in IE Firefox if this option is used If the browser is not correctly configured to browse through the proxy server the ITPilot server will ignore these parameters 5 2 4 Pool size and policy for reusing browsers The parame
33. entage of cases Nevertheless not all wrappers are maintainable This document briefly describes the requirements a wrapper must verify in order to be maintainable Web Administration Tool 31 ly i Hr lt D denodo technologies ITPilot 4 5 User Manual 5 4 5 1 Query Wrapper Model The automatic maintenance support is restricted to wrappers following what we call the Query Wrapper model The workflows of the wrappers according to such model verify some structural patterns de The wrapper starts with a navigation sequence which navigates to a certain page containing some data to be extracted usually this initial sequence involves filling some web query form using some input parameters of the wrapper For instance an initial sequence can navigate to the query form of an Internet bookshop fill the title and author fields and submit the query In Denodo ITPilot this step is accomplished using a SEQUENCE component The data records contained in the page reached by the former sequence are extracted For instance in our example the books present in the page obtained as response of submitting the form are extracted In ITPilot this step is accomplished using an EXTRACTOR component The page containing the extracted data records may contain outbound links to navigate to other pages containing the following result intervals These new pages can contain links to still more results For instance in our example each page may contain 25
34. f past queries are matched against the changed web source resulting in patterns that lead to the regeneration of the wrapper this new wrapper will work correctly with the modified web source without having to be edited manually Web Administration Tool 26 J denodo technologies ITPilot 4 5 User Manual This component is made available through the maintenance server whose configuration process through the Web administration tool is detailed in this section 5 4 1 Access to the Maintenance Server As it can be seen in Figure 22 this area displays the group of maintenance servers that are available at the moment together with the possibility of adding new ones Normally only one will be started but if the size or quantity of sources requires it the option of simultaneously running several of them is also available When adding a new maintenance server to the list its connection settings domain and port and optionally local route can be configured in the same way as the settings for browser pools and wrapper servers remember that if the server is configured with a local route it will be possible to start and stop it from the administration tool otherwise it can be started manually following the instructions in section 5 1 or by using the Denodo Platform Control Center see the Denodo Platform Installation Guide DENINST ITRilot E Online Documentation Log Quit Wrapper Server Browser Pool Maintenance Add Server Maintenan
35. g area of the specifications generator see GENER o Implicitly if the STATE assignment strategy has been activated in the browser pool ASSIGNMENT_STRATEGY PoolAssignmentStrategy see next point and a wrapper does not have an explicitly defined back sequence then Denodo ITPilot will attempt to obtain a suitable back sequence for the wrapper depending on its previous executions Normally Denodo IT Pilot requires at least two wrapper executions before being able to determine whether a back sequence that Is appropriate to the wrapper exists e Browser pool assignment strategy PoolAssignmentStrategy If this browser assignment strategy is activated then when the pool receives a request to execute a specific navigation sequence it then searches amongst the active browsers to see If any Is free that is already in one of the intermediate pages of the sequence thus avoiding having to repeat it in its entirety Continuing with our example if the pool receives a request to execute a navigation sequence to search our source and a browser Is already situated in the source search page probably due to the fact that this browser was used for a previous request with the same wrapper and subsequently the wrapper back sequence was executed on it then execution of the new sequence to said browser is assigned which will then only follow steps 4 and 5 of same thus avoiding the cost of steps 1 3 As mentioned in the preceding section 5 2 4 it is not a
36. he OPT FIELDS column In this example there are no optional parameters and therefore only one operation will be created known as getMails by writing this name in the text field of the OBL Operation Name column corresponding to the webmail wrapper Select the Add Operation column to mark the operation to be added to the web service Lastly the third operation contains all mandatory and optional attributes ITPilot allows to generate the Web Service as a war file Optionally it can also generate the WSDL file for the SOAP type Web Services Pressing the Create Web Service and Create WSDL buttons the user will be able to locally store those files Where required this action can also be tested using the sample programs to be found in the ITPilot installation path in the directory samples itpilot itpilot clients The samples itpilot itpilot clients README file should be read 5 4 CONFIGURING THE MAINTENANCE SERVER Denodo ITPilot offers a component for automatic maintenance of wrappers that detects changes in the web sources and rebuilds the wrappers that access them by analyzing those changes thus making said wrappers more robust and reducing the manual maintenance time The main concept on which this component is based is the storage of the results of successful queries of the wrappers When a change is detected in the source by configurable rules that detect invalid results from a wrapper the results o
37. in section 5 4 e Tests this tab shows information about each of the performed executions and the configured test results obtained after each execution e Queries this tab shows information about the different queries performed e Database this tab shows all information stored in the maintenance database e Graphs this tab lets users create different graphs from both the wrappers and tests that are executed in a specific period of time e uleset lets users create and configure different rules required by the maintenance server 6 1 3 Configuration of the Maintenance Environment The ITPilot automatic maintenance server requires the generation of a ruleset that lets users check if the wrappers have changed The administrator may create as many rules as necessary and they can affect a single wrapper or the complete set Tests Queries Database Graphs Ruleset RR O gt oo i SW A A KE ALL WRAPPERS ITPILOT WEBMAIL ALL WRAPPERS TestName resultsnumber Amount 1 Interval Values TestName resultsnumber Amount 1 Interval Values de a ale hl le he oth TestName pagination Amount 1 Interval Figure 32 Rule Configuration in the Maintenance Graphic Tool Figure 32 shows an example in which a rule has been defined this rule is composed by three tests For more information about each of the rules please read section 5 4 2 5 Though defining the
38. in the title field of the extracted tuples The opposite would mean that the current wrapper might not be correctly extracting the data from that field and thus it might be necessary to regenerate it The percentage value is calculated proportionally to the number of tuples which verify the compatibility test with regard to the total ones Consistency checks whether the results match the regular expressions defined in the wrapper metadata see GENER The intuition behind this test is similar to the previous test if the results do not verify the pointed out regular expressions it is probable that the current wrapper is not correctly performing the extraction process and thus it must be regenerated The percentage value Is calculated proportionally to the number of tuples which verify the regular expressions with regard to the total ones Invariability checks that a certain result percentage of the results of some query is maintained when that same query is executed some time later The intuition behind this test is that in some sources very abrupt changes in the extracted results for a same query alongside time might indicate a malfunctioning of the current wrapper The percentage value is calculated proportionally to the number of tuples which are kept since last query executions with regard to the total ones Pagination checks that in every intermediate result page returned by the wrapper all but the last one the number of returned tu
39. l Constraints If a wrapper is maintainable it will be successfully regenerated in a high percentage of cases Nevertheless in some Cases the regeneration process may fail These are some of the main cases when the regeneration will not be successful If any of the new navigation sequences after the change in the source require launching pop up windows using Javascript the wrapper will not be regenerated If the pop ups that need to be used are launched using the target attribute of an anchor then they are supported The component used in ITPilot to extract structured data records from a HTML page is called EXTRACTOR One of the options of the EXTRACTOR component allows establishing a FROM clause to limit the area of the page where data records will be searched for If any of the new EXTRACTOR components after the change in the source requires this clause the wrapper will not be successfully regenerated If the new navigation sequence required to access detail pages requires filling a form then detail sequences will not be regenerated The EXTRACTOR component internally uses elements called tagsets for data extraction programs Although it is rare after the change the source may require different tagsets from the ones previously used In that case the regeneration process will fail If the updated source shows web dialogs the regeneration process will not be successful Web Administration Tool 32 J denodo technologies ITPilot 4 5 User
40. lease read VOL This is useful when the specification has been produced entirely manually To do so first select the file to load by typing the path to the file in the input field next to the Load VOL File button or clicking the Choose button and graphically selecting the file Once the path is ready click on the Load VOL File The wrapper will appear in the list of database wrappers from which it has been loaded 5 3 8 Creating a Web Service The wrappers deployed in the execution server can be invoked in different ways The native Denodo ITPilot Java API can be used to access the wrappers obtain their data structure and run queries on them from a Java application Another option is to show these wrappers through SOAP or REST type Web Services At last ITPilot lets users export their wrappers as small web applications that accept a URL with input parameters and return a page with the results obtained after the execution A description of the use of these options can be found in the ITPilot Developer s Guide DESAR In the case of Web Services they are created from the Web administration tool This section describes the procedure to generate a Web Service based on an example included in the ITPilot Web Administration Tool 24 J denodo technologies Pilot 4 5 User Manual distribution Therefore before following the directions the appropriate wrapper must be deployed in the server To do so select the webmail vql file
41. lts 2008 02 11 12 39 48 21 results found in 1 pages itpilot webmail ZeroResults 2008 02 11 12 39 20 rissa 21 results found in 1 pages Figure 33 Tests Tab o Wrapper database and wrapper name o Test name of the test that has been executed o Date execution date o Score test result o Passed it reports whether the test was successful or not if so it does not participate in the rule activation o Message provides additional information about the execution e Queries this tab displays information about the queries that have been executed against the wrappers Maintenance Server Graphical Configuration and Monitoring tool 37 J denodo technologies ITPilot 4 5 User Manual Queries tel Wrapper E Query Date Results Pages itpilot webmail PASSWORD DeMo 04 LOGIN demos 2008 02 11 12 39 48 21 1 itpilot webmail MainExtractor PASSWORD DeMo 04 LOGIN demos 2008 02 11 12 39 47 itpilot webmail PASSWORD DeMo 04 LOGIN demos 2008 02 11 12 39 20 zi 1 O itpilot webmail MainExtractor PASSWORD DeMo 04 LOGIN demos 2008 02 11 12 39 19 Figure 34 Queries Tab o Wrapper database wrapper and optionally Extractor component name o Query query that has been executed against the wrapper server o Date execution date o Results number of returned results o Pages if related to an Extractor component number of pages used in execution if related to a wrapper the value is always 1
42. lts in the desired folder file The Include Headers checkbox allows to include the names of the output fields as headers in the CSV file 5 3 3 Selecting location of the associated browser pool The wrapper server requests browser instances to the browser pool when a wrapper that performs web browsing Is executed The administration tool allows to configure what browser pool is going to recelve the wrapper server requests by using the selector in the Browser pool configuration parameters section see Figure 17 This selector displays all the browser pools that have been configured in the Browser Pool tab of the web administration tool as discussed before Browser Pool Name LOCALPOOL LOCALPOOL SER VWERPOOL Figure 17 Pool Browser Localization 5 3 4 Port Assignment In this section the following parameters can be configured Application Port port through which the wrapper server listens and waits for requests Shutdown Port port through which the server listens and waits for the Shutdown signal Auxiliary Port used for communications between the browser pool and the wrapper server 5 3 5 Configuration of HTTPClient with no Browser Pool The http client Denodo HTTPBrowser can be executed from the ITPilot wrapper server without having to start a browser pool in a separate process since the wrapper server internally manages an HTTP client pool itself This internal pool can be configured in the H
43. lways advisable to reuse browsers REUSABLE BROWSERS options checked It can occur that dealing with a previous request changes the browser response to subsequent requests for example through the use of cookies which makes its reuse inadvisable The typical case is when an attempt is made to access a source in which another browser is authenticated often when navigating to the home page the entry form is not requested again login password whereby the sequence will fail as it cannot find it However using the PoolAssignmentStrategy strategy sometimes it is possible to reuse browsers in this scenario If Web Administration Tool 18 F i a d denodo technologies ITPilot 4 5 User Manual all accesses to the source share the same login password pair as this strategy prevents the browser from trying to execute the authentication steps again as it considers them part of the initial common steps If there are cookie sessions in the source and a different login password pair is used for each access then REUSABLE BROWSERS must be unchecked When it is possible to reuse a browser from a previous query it is good to do so even if the sequence executes from the beginning because you save having to create a new browser for each query if the pool load is high this is very noticeable 5 2 5 Initializing the pool The browser pool can be configured to automatically initialize a certain number of browsers belonging to any of the three types
44. n Server this is the component responsible for transforming PDF documents to HTML so their content can be extracted by Denodo ITPilot 1 1 4 Maintenance Environment The Maintenance Environment adds functionality on top of the Execution Environment and complements it by making the deployed wrappers more robust and reducing the manual maintenance effort As Web sources are autonomous and independent of the wrappers they can change over time and these changes can invalidate the current access mode whereby the wrappers no longer extract the data properly Denodo ITPilot offers an automated maintenance tool that allows wrappers to be repaired automatically by detecting the changes referred to above Although this will be dealt with in more depth in section 5 4 its basic functioning is as follows The wrapper server stores all the wrappers in each of the Web sources The system uses the check frequency configuration parameter to check each wrapper for changes When a change is detected in a source the actions to be taken can be configured o One possible action is to send an e mail informing of the change o The other option is to regenerate and edit the wrapper Actions can be strung together and can be implemented by users The components of this environment apart from those already mentioned in the execution environment are as follows Maintenance Server component responsible for detecting automatically any change happened i
45. n the sources and for regenerating the wrappers It communicates with the wrapper server to request all the wrappers to maintain and to obtain the query execution results over them which will be used to check possible changes and during the regeneration process Browser Pool of the Maintenance Server browser pool used in the regeneration phase PDF Conversion Server this is the component responsible for transforming PDF documents to HTML so their content can be extracted by ITPilot As mentioned earlier a detailed explanation of this environment is provided in section 2 3 of this same manual The next section recommends different distribution architectures for these components Chapter 3 gives details of the installation and configuration processes for each of the ITPilot environments Introduction 4 ly Ter D denodo technologies ITPilot 4 5 User Manual 2 DISTRIBUTION OF ENVIRONMENTS 2 1 DISTRIBUTION OF THE GENERATION ENVIRONMENT As mentioned in the preceding section the Generation Environment allows wrappers to be created in a visual and simple way This environment requires the installation of two components the specifications generator tool and the navigation sequences generator tool The wrapper server of the execution environment may also be accessible this is optional users also have the option of storing the wrapper in a local file that can be manually added to the wrapper server Figure 3 shows the relationship be
46. nistration Tool 2 J denodo technologies ITPilot 4 5 User Manual its path must be added to the DENODO_EXTERNAL_CLASSPATH environment variable so Denodo can find it Pool size maximum number of simultaneous connections the pool will allow by default 5 Test query test query executed on the DBMS The connection pool before assigning any of the free connections in the queue will check to verify if the connection is valid or not by default SELECT FROM ping_table Figure 23 shows these configurable parameters in the maintenance server tab Connected to LOCALSERVER Database Parameters Provider derby JDBC URL jdbc derby maintenance User maintenance Password maintenance JDBC Driver org apache derby jdbc EmbeddedDrive Pool Size Test Query SELECT FROM ping table Figure 23 Maintenance database Parameters 9 4 2 2 E mail notification parameters These parameters will be used to notify via e mail those changes detected in the sources SMTP Server name of the mail server From e mail address from which the notification is emitted To e mail address to which the notification is sent Subject e mail subject SMIP Login optional SMTP Password optional Figure 24 shows these configurable parameters in the maintenance server tab Web Administration Tool 28 J denodo technologies ITPilot 4 5 User Manual Mail Notification Parameters SMTP Server localhos
47. ol indefinitely DOWNLOAD_CONTROLS This group of parameters allows the type of contents that should be downloaded by the pool browsers to be specified The content types whose download can be configured are images videos background sounds script programs Java applets and ActiveX components for download and execution purposes If Firefox is used as browser only the following parameters can be configured images javascript java cache and proxy If Denodo HTTPBrowser is used only the following parameters can be configured javascript java cache and activex CACHE_CONTROLS This group of parameters is for specifying whether or not the pool browsers should Web Administration Tool 15 J denodo technologies ITPilot 4 5 User Manual use the local cache and or the proxy cache Firefox and HT TPBrowser do not allow the proxy cache option to be configured HTTPBrowser can configure an additional parameter for the maximum number of JavaScript files that can store in Its JavaScript cache Maximum number of cached JavaScript files cached scripts will be executed faster than the ones that have to be downloaded again e GRAPHICAL INTERFACE Indicates whether or not the pool browsers will display a graphical interface To optimize system efficiency applications in production do not normally display browser graphical interfaces However it may be useful to turn the interface on for debugging purposes This parameter can only be configured wh
48. on of pool and assignment of ports The parameters of this group are e TYPE OF BROWSER browser type to be used in the pool by default it will be used by the wrappers configured to use the default browser type Web Administration Tool 13 I i i OD denodo ECNNDIOGI I ITPilot 4 5 User Manual da o lEBrowser Internet Explorer browser o Firefox Firefox browser o HITP Denodo HI TPBrowser browser PORT Port in which the browser pool listens to requests INITIAL_PORT Each browser of the pool listens to requests in a port The value of this parameter determines the port number to be used as the first one to assign port numbers to the browsers From this number consecutive port numbers will be used in an ascending order SHUTDOWN_PORT port in which the server listens the Shutdown signal in order to be stopped AUXILIARY_PORT The auxiliary port is used by the pool for communications with its clients Figure 9 shows the administration tool page where to configure those parameters Port Identification and Port Assignment Browsers PORT 6001 SHUTDOWN PORT 6002 INITIAL PORT 6100 AUKILIARY PORT 6003 Figure 9 Identification and Assignment 5 2 1 1 Comparison between the browser pool and the http client The ITPilot http client Denodo HTTPBrowser embeds a JavaScript engine which allows it to perform complex navigations in several web sources When deciding what type of browsing tool to use a browser pool or an h
49. ording to said configuration The browser pool is configured in the Browser Pool panel of the administration tool in the ITPilot execution environment Figure 7 shows this window ito ITFilat E Online Documentation Log ut Wrapper Server Browser Pool Maintenance Add Server Browser Pool Name Remove Connect Edit Start Stop Refresh LOCALPO DL localhost 6010 running E HE E Figure 7 Browser pool Tab In the first place the connection settings of each browser pool to be managed must be indicated The AddServer Add Server button is used for this which displays a window like that shown in Figure 8 The fields to be completed are as follows Name server identifier name Host address where it is found Port server listening port Local path optional to indicate that the server is local by adding the local path where the application is the user will be able to start up and stop the browser pool from the graphical administration tool Web Administration Tool 12 J denodo technologies ITPilot 4 5 User Manual tp ITPilot E Online Documentation Log Gut Wrapper Server Browser Pool Maintenance Server Location ane O Local Path O Accept Figure 8 Server Addition Page The connection settings of an already added server can be edited by pressing the Edit button that leads to the same configuration window mentioned earlier The Start Stop button will be visible if
50. ource called wrapper that isolates the client applications from the intrinsic characteristics of this site access protocol native data structure etc ITPilot provides a distributed and scalable environment for generating executing and maintaining wrappers This manual presents Denodo ITPilot and provides instructions for correct installation recommendations on the different types of architecture it supports as well as a guide to the execution and maintenance environment The components of ITPilot are introduced in this same section next section will provide an overview of the recommended architectures Chapter 3 gives a detailed description of the installation process for each of the components while Chapter 4 does the same job with the server startup procedure Chapter 5 explains the ITPilot Web Administration Tool and how to export a wrapper as a Web Service Finally Chapter 6 deals with the ITPilot Maintenance Server Graphical Configuration and Monitoring Tool 1 1 DENODO ITPILOT ENVIRONMENTS Denodo ITPilot facilitates wrapper generation execution and maintenance in Web sources in a simple and dynamic way Three Environments exist each of which facilitates one of the aforementioned actions and all are managed through the Administration Tool Each environment contains a series of Components described below Figure 2 shows the relationships between Environments and their Components Introduction 2 J denodo technologies ITPilot 4 5 User
51. ples is the same If any intermediate page does have fewer results than others this could mean that the wrapper is omitting some relevant results take into account that web sources usually paginate their results in intervals with a fixed number of results for each one The returned percentage value is calculated as a function of the deviation of the obtained number of tuples with regard to the expected number of tuples This expected number of tuples is calculated by supposing that each intermediate page returns the maximum number of results obtained for some of the pages ResultsNumber checks that the number of tuples obtained in successive executions of a same query alongside time is similar The intuition behind this test Is that in some sources very abrupt changes in the number of extracted results for a same query could indicate a malfunctioning of the current wrapper The percentage value is calculated proportionally to the deviation of the number of tuples returned by the query with regard to the average of the last executions of that query The verification rule editor allows the configuration of each entry in the following manner Test test to perform Invariability Pagination etc Amount number of executions of the wrapper that this test must carry out for this entry to be activated This quantity must be taken contextually to the execution interval which will be taken into account as configured in Interval Interval wrapper
52. quires that the ebrowser component be used as an access method whereby a browser pool should be used Its location can be indicated in the administration tool window by selecting in the combo box the name used in the Browser Pools tab to identify it see Figure 27 Browser Pool Name ia ll Figure 27 Locating the browser pool 5 4 4 Selecting location of wrapper server Likewise the maintenance server needs to access the wrapper server where the wrappers in execution are stored so that it can detect changes and regenerate them automatically In the list Wrapper Server Name you can select the required wrapper server from all those that have been created in the Wrapper Server tab see Figure 28 Wrapper Server Name L CALSE RIVER hul Figure 28 Locating the Wrapper Server Clicking on the Save Changes button allows you to store all the changes made In each tab there is a Save Changes button which saves the configuration i e it sends the new configuration to the corresponding server for it to be stored on disk For the new configuration to take effect the corresponding server must be relaunched 5 4 5 Capabilities and limitations of the Maintenance Server The ITPilot maintenance server includes advanced functionalities for automatically maintaining web wrappers when the target web sources change When a wrapper is maintainable ITPilot will be able to regenerate the wrapper automatically in a high perc
53. r can be launched with the Web server that contains the cab control running and the site containing the aforementioned elements can be loaded NOTE It is important to note that the browser must be configured to enable the running of ActiveX controls which is often done by customizing the security tab in Tools gt Internet Options or by selecting the Low Level security option in the required Web content area e g Local Intranet if it is a local site or Internet if the site being run in the sequence is accessible over the Internet If the browser is opened with the aforementioned site it can be seen how the browser automatically runs the browse sequence described in the value attribute of the param element The feature is currently deprecated in IT Pilot ANNEX A DEPRECATED FEATURES 40 ly Ter lt D denodo technologies ITPilot 4 5 User Manual REFERENCES BEA BEA Systems Application Server Attp www bea com DENINST Denodo Platform 4 5 Installation Guide Denodo Technologies 2008 DESAR Denodo ITPilot 4 5 Developer Guide Denodo Technologies 2008 DEXTL Denodo DEXTL 4 5 Manual Denodo Technologies 2008 GENER Denodo ITPilot 4 5 Generator Environment Guide Denodo Technologies 2008 FRFOX Mozilla Firefox Browser http www firefox com IE Microsoft Internet Explorer htto Awww microsoft com windows 16 150639 Language codes 150 639 http www ics uci edu pub iett http related
54. red The configurable elements of this window are detailed below ITFilot E Online Documentation Log Gut Wrapper Server Browser Pool Maintenance Add Server Wrapper Server Name Remove Connect Edit Start Stop Refresh LOCALSERVER localhost 9999 running E ry O Figure 14 Wrapper Server Configuration Window 5 3 1 Access to Wrapper Server As it can be seen in Figure 14 this area shows the group of wrapper servers currently available in time as well as the possibility of adding new ones When a new Server is added the host and port where it is located can be configured in the server connection settings remember that if it is configured as residing in the same machine as the administration tool the wrapper server will be allowed to be directly started up from the web interface otherwise it should be started manually following the instructions in section 5 1 To configure one of the servers of the list connect to it in order to access its management panel by pressing the a button of the desired wrapper server A window is shown where the user must type the login and password to connect the wrapper server the default values are admin admin in case ITPilot is the only Denodo product installed It is possible for the system to remember these data during the session by pressing the Remember my ID Web Administration Tool 20 J denodo technologies ITPilot 4 5 User Manual checkbox A new page will be shown like th
55. rns a page with the query results The first three steps are common to all queries made to the wrapper The difference between one query and the next only arises in step four when the search form is completed according to the specific query to be made at each moment in time It would be nice to save time on these first three steps in each query ideally when a new query is received one browser is already authenticated and situated in the search page of the source to which the new request could be assigned The browser searches immediately step 4 and returns the results step 5 thus avoiding wasting time in steps 1 3 Denodo ITPilot supports this intelligent reuse of browsers through the combined use of the following mechanisms e Back navigation sequences A back navigation sequence is responsible for returning a browser to a state in which it can be reused in future requests to the same wrapper When the wrapper in our example has made a query to the source the browser used to execute the navigation sequence stays in the query results page step 5 For the browser to be used for a new wrapper query it must return to the search page step 4 The sequence responsible for achieving this is the aforementioned back sequence A wrapper can obtain a back sequence in two ways o Explicitly the wrapper creator can specify a back navigation sequence for a wrapper in the search tab in the Back Sequence option in the sequence loadin
56. s comprising semi structured responses encoded in HTML documents This part of the Web accessed through different types of forms and or interfaces that return data automatically obtained from internal databases is normally called Hidden Web This Hidden Web is by no means a small part of the whole WWW and contains a huge amount of data which in many cases are of great quality and interest to users Web sites like e shops that provide their catalogs in this way and search engines for data of a scientific health patenting or financial nature are good examples of this It is also often the case that these Web sites are private access i e a user password is required to access them have an advanced query interface allowing data searches in respect of different subject matters and or return results in the form of lists of items encoded in HTML with links to related pages that contain more data on each item e g generally e shops return a list of results but with the option for the user to click on the title to access another page with commentaries on the product photos related products etc Other common complications arise from the use of technologies such as JavaScript dynamic HTML or session maintenance systems that further complicate automated access to data contained in these Web sites In addition to the problem of accessing these sources with hidden data applications that want to use these data are also
57. s in the database is displayed next to the title of the section The data displayed for each of the wrappers is as follows Name the name of the wrapper Maintenance selection option that indicates whether the wrapper selected will be maintained automatically or not Clicking on the Enable link will activate the wrapper maintenance It is possible to enable the maintenance for all the wrappers of the database at the same time by using the All button Once the maintenance is enabled for a wrapper it can be disabled again by clicking the Disable link or for all the wrappers by clicking the None button With the wrapper maintenance enabled the following options are available o The parameter regenerate indicates whether ITPilot must try to automatically regenerate the wrapper when a source change Is detected or not o The parameter autodeploy sets the system to automatically install the regenerated wrapper in the server replacing the old version If this parameter is not selected the new wrapper is stored in the path DENODO_HOME metadata maintenance regenerations with DENODO_HOME being the folder where the Denodo Platform is installed in The replaced versions are stored in the metadata maintenance backup path adding the date in Web Administration Tool 21 J denodo technologies ITPilot 4 5 User Manual which the wrapper was updated When a wrapper cannot be automatically maintained the web adminis
58. t From Subject Denodo Maintenance Notification SMTP Login di O Password Figure 24 Wrapper Change Notification Parameters 9 4 2 3 Port Assignment Parameters Application Port port used by the maintenance server to communicate with the wrapper server Shutdown Port port used by the server to wait for the Shutdown signal in order to finish its execution If received Auxiliary Port communication port between the maintenance server and its clients Figure 25 shows these configurable parameters Port Assignment Shutdown Port 7002 Application Port 7001 Auxiliary Port 7003 Figure 25 Port Assignment Parameters 9 4 2 4 Other configuration parameters Server address this is either the name or the IP address of the computer where the maintenance server is located This parameter is used by the maintenance server to automatically configure the wrapper server so the wrapper server knows how to contact the maintenance server Because of this the Server address has to be a name or IP address that is reachable from the computer where the wrapper server Is being executed 5 4 2 5 Edition of Verification Rules The ITPilot automatic maintenance system requires the generation of a set of rules to check which wrappers have changed The administrator can create as many rules as desired and they can affect a single wrapper or the whole set If the administrator wishes to select a wrapper as the single target of a rul
59. ters of this group are available for all three browser types these are e MAX POOLSIZE Maximum number of browsers in the pool e MIN POOLSIZE Minimum number of browsers The system will not reuse browsers already existing in the pool unless the current number is equal to or greater than the value of this parameter e REUSABLE_BROWSERS Indicates if the pool browsers can be reused to deal with more than one request Enabling browser reusability increases the efficiency of most applications however it may not be suitable in some cases where dealing with a previous request changes the browser response to subsequent requests for example through the use of cookies e ASSIGNMENT STRATEGY Allows to select the assignment strategy to be used by the browser pool The PoolAssignmentStrategy strategy attempts to assign a browser to each request the status of which allows the number of navigation steps required to deal with a request to be minimized Otherwise the SimplePoolAssignmentStrategy strategy assigns any free browser to each request If reuse is deactivated REUSABLE_BROWSERS false then the ASSIGNMENT STRATEGY value is ignored The next section 5 2 4 1 explains the implications of this parameter in more detail e MAX BROWSER TTL Maximum Time to Live of a browser If a browser is active more than the specified time it will be removed and a new one will be created with the same page loaded as the former browser This is useful because d
60. that controls both the wrapper server and the browser pool as well as the maintenance server in case of having maintenance enabled Figure 6 displays the aspect of the tool after startup and access through the URL domain port webadmin denodo itpilot admin and with user admin and empty password as initial access The tool is visually composed of the elements described in the preceding figure e Server Selection Area it is here that the user can select which server is to be configured wrapper server browser pool or maintenance server where it is used for administration of the execution environment e Work Area this area displays the configuration data relevant for each server The Web administration tool can be used to configure and in specific cases start up and stop the different servers that make up the execution and maintenance environments The following section describes the series of steps to be taken to configure and administer the execution and maintenance environments O ITRilot User Identification Change Password gt gt Login Figure 6 Login page of the Administration tool 5 1 STARTING UP THE SERVERS The administration tool can be used to manage the configuration of each of the servers The servers must be started up and running before they can be configured via the web administration tool If they are in the same machine as the administration tool they may be started up from it directly by using the but
61. ton Start Stop E if the servers are found distributed across machines other than where the administration tool resides these must be started up beforehand 52 CONFIGURING THE BROWSER POOL The wrappers that implement the navigation sequences through NSEQL programs require that the ITPilot execution Web Administration Tool 11 J denodo technologies Pilot 4 5 User Manual environment has access to a browser pool The configuration options for his component are described in this section The pool browsers can belong to three different types e lEBrowser browsers based on Microsoft Internet Explorer e Firefox browsers based on Mozilla Firefox e HITPBrowser browsers based on Denodo HTTPBrowser a GUl less HTTP based browser with Javascript support One pool may contain browsers that belong to one or more of these types The browser type to use for each browsing sequence is defined at wrapper generation time it can be set to a specific browser type or it can be set to use whatever type of browser is configured in the browser pool please see the Denodo ITPilot Generation Environment Guide GENER for more information A first aspect to bear in mind is that the IEBrowser and Firefox type browsers in the pool will use the configuration established for Microsoft Internet Explorer and or Firefox in the system in which the pool is executed It is also necessary to consider the security options and cookies as the pool browsers will act acc
62. tration tool will show the icon next to the Enable link Despite not being maintainable the wrapper can still be configured as Enabled this will make the source to be monitored by ITPilot so that in the event of the source changing and the wrapper needing to be modified an electronic mail will be sent to notify the situation see section 5 4 Export by clicking on the 8 button a new web page is shown from where the wrapper specification can be exported to the file specified by the user The option is provided to include in the file the scanners that the wrapper uses Selecting the All button in the Export column will export all the wrappers of the database Execution by clicking on the gt button the wrapper can be executed as seen in the next section Delete pressing the button E the wrapper is eliminated from the server Clicking the All button in the Delete column will delete all the wrappers of the database 5 3 2 1 Wrapper Execution The administration tool allows queries to be made to the wrappers through the Execution option mentioned earlier Figure 16 displays the Execution window The checkboxes on the left of the screen allow to select which output fields of the wrapper are going to be displayed in the result table The text fields of the right part of the screen are used to set the values of the input parameters of the wrapper the mandatory fields are displayed with the
63. ttp client to extract information from a web source the following factors must be taken into account 1 DD Efficiency The http client is more efficient than the IE Firefox browsers since it is lighter This implies an increase in the response time when accessing sources and a decrease in the CPU load of the machine which houses the browser pool this feature is very important when several parallel executions are required The http client can not execute some of the NSEOL navigation commands see NSEQL The http client does not interpret code written in VBScript In some pages ITPilot s JavaScript engine may process JavaScript code in a different way than Internet Explorer or Firefox do This is because these browsers interpreters might be laxer regarding the syntax used by the web pages In these cases the desired behavior will be that of Internet Explorer or Firefox since very probably the target pages have been designed to work correctly with those browsers Web Administration Tool 14 ly i Hr 0 denodo technologies ITPilot 4 5 User Manual 5 2 1 2 HTML conversion configuration This section shows how to configure the conversion tools from Microsoft Word Excel and PDF to HTML so that the content of those resources can be extracted by ITPilot PDF To HTML converter conversion tool type used to transform the PDF resource into HTML o Acrobat HTML uses the HTML conversion tool from the Adobe Acrobat Professional softwar
64. tween the elements Sequence Specification Generator Tool Generator Tool Pool Browsers Figure 3 Distribution of the Generation Environment The wrapper server belongs to the execution environment whereby It Is normally installed in a separate machine in the production environment This manual does not aim to explain how to install operate and handle the tools in this environment For more information please refer to GENER for instructions on installation and operation and DEXTL and NSEOL for detailed information on specification and sequence definition languages 2 2 DISTRIBUTION OF THE EXECUTION ENVIRONMENT Denodo ITPilot operates in the execution environment where actions are executed on wrappers that encapsulate the Web sources from which data are to be extracted Three components are required in this case the Web administration tool Independent of the environment but used here the wrapper server and the browser pool Figure 4 describes the relationship between these elements Distribution of Environments 5 ly i TEET d denodo technologies ITPilot 4 5 User Manual Configuration Administration Configuration tool Figure 4 Distribution of the Execution Environment As the wrapper server can be used in different environments and due to its possible workload it is recommended that it be installed in a machine that is independent of the rest of the system The browser pool can be found either in the same machine
65. ue to known problems in some versions of Microsoft Internet Explorer when using this type of browser performance may degrade if the browser has been open for too long Figure 12 shows the administration tool page where to configure these parameters IEbrowser Pool Size and Reutilization Policy MAX POOLSIZE REUSABLE BROWSERS REUSABLE MIN POOLSIZE ASSIGNMENT STRATEGY MAX BROWSER TTL Figure 12 Size and Reuse Policy 5 2 4 1 Browser Reuse Policies It often occurs that navigation sequences executed by a specific wrapper share a series of initial common steps for example imagine that a wrapper has been created to automate the search process in a specific Web source The source requires an authentication process that involves the introduction of a user name and a password In our example let us imagine that the wrapper uses the same login password pair for all source accesses Using Denodo ITPilot to create this wrapper for more information see GENER an initial navigation sequence would Web Administration Tool 17 ly i Hr d denodo technologies ITPilot 4 5 User Manual be created that would execute the following steps 1 Connect to the source home page 2 Complete the authentication form with the login password and press the Submit or Enter button to authenticate 3 Once authenticated click on the link that accesses the search page Complete the search form with the required query 5 The server retu
66. ure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 Figure 19 Figure 20 Figure 21 Figure 22 Figure 23 Figure 24 Figure 25 Figure 26 Figure 27 Figure 28 Figure 29 Figure 30 Figure 31 Figure 32 Figure 33 Figure 34 Figure 35 Figure 36 Figure 37 ITPilot 4 5 User Manual Bookshop form 2 ITPilot Environments and Components 3 Distribution of the Generation Environment 5 Distribution of the Execution Environment 6 Relationship Between Execution and Maintenance ENVIFTONMENTS 7 Login page of the Administration tool 11 NNN 12 SS II sia 13 fe Se Ge ASS GA EN 14 A 16 ORINA O ds 16 SEO AR RR A 17 PA 19 Wrapper Server Configuration Window 20 Wrapper server 1s SMC ciao iaia 21 Wrapper Execution 3 EEE EEE 22 PN TN 23 Configuration parameters of the http client in the Wrapper Server 24 Loading Wrappers Using VOL AE ossiscdeasssidiaciicaveunentecsysticaentendvetwennestaavsaenasesdianssdtaanssdnaiietnasatnatsltbeanes 25 List of Wrappers with Loaded Webmail 25 WED DEVICE EX Paid 26 Maintenance Administration Main Pagg 27 Maintenance database ParametersS ii 28 Wrapper Change Notification Parameters 29 Port Assignment ee EE SE 29 Edition of Verification Rules 31 ENN 31 Locating the
67. with a specific navigation sequence This functionality is useful when the navigation sequences to be executed by application share a series of initial steps e g establishing a session through an authentication process with which we want to save time when executing requests Using this functionality and the PoolAssignmentStrategy assignment policy it is possible to improve the response times of the system in these cases For each required navigation sequence two parameters must be specified e POSITION NSEQL program that implements the navigation sequence e g navigate http www denodo com 1 e INITIAL BROWSERS Number of browsers we want the pool to initialize with this navigation sequence If no navigation sequence is specified in this section the pool will not automatically start up any browser when it initializes Instead it does so as requests are received Figure 13 shows the administration tool page where to configure these parameters Pool Initialization Figure 13 Pool Initialization 5 2 6 Firefox Installation Base Path Configuration This section shows how to configure Firefox to be used in the ITPilot execution environment e Firefox Home directory Firefox installation base path o In this case besides updating the directory in the administration tool the plugin lt DENODO HOME gt setup itpilot dll iebrowser denodo runtime xpi must be installed by executing the firefox install global extension denodo runtim

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