Oracle BPEL Polling Database Adapter

Can someone give me sample or link of db polling ?
i tired in following way
1. created db adapter with logical delete option
2. then created bpel process based on wsdl
i tired inserting new data but my instance did not get executed?

Hi,
Can you please specify your requirement in more detail so I can understand why you need to DB adapter.
Inbound vs Outbound:
The main function of inbound is to execute a sql select query and turn the result set as a message. This in relation to outbound that handles a message to execute an SQL query.
Don't worry about this with the DB adapter as it will do this for you. The only thing you have to make sure that the JNDI name you specify in the DB adapter is configured as a data source in weblogic.
Thanks
Sander

Similar Messages

  • Use of current time for polling Database Adapter query

    I am writing a simple BPEL process with a Polling Database Adapter and a Recieve. The idea is that we are polling an XE database for any entries in a TRIP table which have an expiration date/time field that has passed.
    The Adapter was build using JDeveloper 10.1.3.2 (with Oracle Application Server patched to 10.1.3.3.0) as a "Poll for New Changed Records in a Table" Operation type with a STATUS field (0 for live, 1 for expired) as the Logical Delete Field.
    I was unable to find a way to generate a SELECT query expression with the wizard that would allow me to use current/system time as an attribute, so I finished the wizard and edited the Toplink Descriptor to use a custom SQL expression for the query. This resulted in the following code in the toplink_mappings.xml file:
    <?xml version="1.0" encoding="UTF-8"?>
    <toplink:object-persistence version="Oracle TopLink - 10g Release 3 (10.1.3.1.0) (Build 061004)"
    xmlns:opm="http://xmlns.oracle.com/ias/xsds/opm" xmlns:xsd="http://www.w3.org/2001/XMLSchema"
    xmlns:toplink="http://xmlns.oracle.com/ias/xsds/toplink"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <opm:name>ExpiredTripPoller</opm:name>
    <opm:class-mapping-descriptors>
    <opm:class-mapping-descriptor xsi:type="toplink:relational-class-mapping-descriptor">
    <opm:class>ExpiredTripPoller.Trip</opm:class>
    <opm:alias>Trip</opm:alias>
    <opm:primary-key>
    <opm:field table="TRIP" name="ID" xsi:type="opm:column"/>
    </opm:primary-key>
    <opm:events xsi:type="toplink:event-policy"/>
    <opm:querying xsi:type="toplink:query-policy">
    <opm:queries>
    <opm:query name="ExpiredTripPoller" xsi:type="toplink:read-all-query">
    <toplink:timeout>0</toplink:timeout>
    <toplink:call xsi:type="toplink:sql-call">
    <toplink:sql>SELECT ID, LPN, START_TIME, EXPIRY_TIME, STATUS FROM TRIP WHERE ((STATUS = '0') AND (EXPIRY_TIME < SYSDATE)) ORDER BY EXPIRY_TIME ASC</toplink:sql>
    </toplink:call>
    <toplink:reference-class>ExpiredTripPoller.Trip</toplink:reference-class>
    <toplink:cache-usage>primary-key</toplink:cache-usage>
    <toplink:lock-mode>none</toplink:lock-mode>
    <toplink:container xsi:type="toplink:list-container-policy">
    <toplink:collection-type>java.util.Vector</toplink:collection-type>
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    <toplink:reference-class>ExpiredTripPoller.Trip</toplink:reference-class>
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    <toplink:container xsi:type="toplink:list-container-policy">
    <toplink:collection-type>java.util.Vector</toplink:collection-type>
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    <toplink:does-exist-query xsi:type="toplink:does-exist-query">
    <toplink:existence-check>check-database</toplink:existence-check>
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    <toplink:read-all-query xsi:type="toplink:read-all-query">
    <toplink:reference-class>ExpiredTripPoller.Trip</toplink:reference-class>
    <toplink:container xsi:type="toplink:list-container-policy">
    <toplink:collection-type>java.util.Vector</toplink:collection-type>
    </toplink:container>
    </toplink:read-all-query>
    </opm:querying>
    <opm:attribute-mappings>
    <opm:attribute-mapping xsi:type="toplink:direct-mapping">
    <opm:attribute-name>id</opm:attribute-name>
    <opm:field table="TRIP" name="ID" xsi:type="opm:column"/>
    <opm:attribute-classification>java.math.BigDecimal</opm:attribute-classification>
    </opm:attribute-mapping>
    <opm:attribute-mapping xsi:type="toplink:direct-mapping">
    <opm:attribute-name>lpn</opm:attribute-name>
    <opm:field table="TRIP" name="LPN" xsi:type="opm:column"/>
    <opm:attribute-classification>java.lang.String</opm:attribute-classification>
    </opm:attribute-mapping>
    <opm:attribute-mapping xsi:type="toplink:direct-mapping">
    <opm:attribute-name>startTime</opm:attribute-name>
    <opm:field table="TRIP" name="START_TIME" xsi:type="opm:column"/>
    <opm:attribute-classification>java.sql.Timestamp</opm:attribute-classification>
    </opm:attribute-mapping>
    <opm:attribute-mapping xsi:type="toplink:direct-mapping">
    <opm:attribute-name>expiryTime</opm:attribute-name>
    <opm:field table="TRIP" name="EXPIRY_TIME" xsi:type="opm:column"/>
    <opm:attribute-classification>java.sql.Timestamp</opm:attribute-classification>
    </opm:attribute-mapping>
    <opm:attribute-mapping xsi:type="toplink:direct-mapping">
    <opm:attribute-name>status</opm:attribute-name>
    <opm:field table="TRIP" name="STATUS" xsi:type="opm:column"/>
    <opm:attribute-classification>java.math.BigDecimal</opm:attribute-classification>
    </opm:attribute-mapping>
    </opm:attribute-mappings>
    <toplink:descriptor-type>independent</toplink:descriptor-type>
    <toplink:caching>
    <toplink:cache-type>weak-reference</toplink:cache-type>
    <toplink:always-refresh>true</toplink:always-refresh>
    </toplink:caching>
    <toplink:remote-caching>
    <toplink:cache-type>weak-reference</toplink:cache-type>
    </toplink:remote-caching>
    <toplink:instantiation/>
    <toplink:copying xsi:type="toplink:instantiation-copy-policy"/>
    <toplink:change-policy xsi:type="toplink:deferred-detection-change-policy"/>
    <toplink:tables>
    <toplink:table name="TRIP"/>
    </toplink:tables>
    </opm:class-mapping-descriptor>
    </opm:class-mapping-descriptors>
    </toplink:object-persistence>
    To test I used the above custom SQL at the command line and it filtered the records by EXPIRY_TIME as expected.
    When deployed, the polling process updates the STATUS file dof table entries, but all entries with status 0 regardless of EXPIRY_DATE. My modification appears to be being ignored. I was unsure as to whether the QUERY was being determined in some other way so I modified the descriptor (with the toplink expression editor) to compare against a literal time value, producing the following modified toplink_mappings.xml:
    <?xml version="1.0" encoding="UTF-8"?>
    <toplink:object-persistence version="Oracle TopLink - 10g Release 3 (10.1.3.1.0) (Build 061004)"
    xmlns:opm="http://xmlns.oracle.com/ias/xsds/opm" xmlns:xsd="http://www.w3.org/2001/XMLSchema"
    xmlns:toplink="http://xmlns.oracle.com/ias/xsds/toplink"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <opm:name>ExpiredTripPoller</opm:name>
    <opm:class-mapping-descriptors>
    <opm:class-mapping-descriptor xsi:type="toplink:relational-class-mapping-descriptor">
    <opm:class>ExpiredTripPoller.Trip</opm:class>
    <opm:alias>Trip</opm:alias>
    <opm:primary-key>
    <opm:field table="TRIP" name="ID" xsi:type="opm:column"/>
    </opm:primary-key>
    <opm:events xsi:type="toplink:event-policy"/>
    <opm:querying xsi:type="toplink:query-policy">
    <opm:queries>
    <opm:query name="ExpiredTripPoller" xsi:type="toplink:read-all-query">
    <opm:criteria operator="lessThan" xsi:type="toplink:relation-expression">
    <toplink:left name="expiryTime" xsi:type="toplink:query-key-expression">
    <toplink:base xsi:type="toplink:base-expression"/>
    </toplink:left>
    <toplink:right xsi:type="toplink:constant-expression">
    <toplink:value xsi:type="xsd:date">2007-07-30</toplink:value>
    </toplink:right>
    </opm:criteria>
    <toplink:timeout>0</toplink:timeout>
    <toplink:reference-class>ExpiredTripPoller.Trip</toplink:reference-class>
    <toplink:cache-usage>primary-key</toplink:cache-usage>
    <toplink:lock-mode>none</toplink:lock-mode>
    <toplink:container xsi:type="toplink:list-container-policy">
    <toplink:collection-type>java.util.Vector</toplink:collection-type>
    </toplink:container>
    </opm:query>
    <opm:query name="findAllTrip" xsi:type="toplink:read-all-query">
    <toplink:timeout>0</toplink:timeout>
    <toplink:reference-class>ExpiredTripPoller.Trip</toplink:reference-class>
    <toplink:cache-usage>primary-key</toplink:cache-usage>
    <toplink:lock-mode>none</toplink:lock-mode>
    <toplink:container xsi:type="toplink:list-container-policy">
    <toplink:collection-type>java.util.Vector</toplink:collection-type>
    </toplink:container>
    </opm:query>
    </opm:queries>
    <toplink:does-exist-query xsi:type="toplink:does-exist-query">
    <toplink:existence-check>check-database</toplink:existence-check>
    </toplink:does-exist-query>
    <toplink:read-all-query xsi:type="toplink:read-all-query">
    <toplink:reference-class>ExpiredTripPoller.Trip</toplink:reference-class>
    <toplink:container xsi:type="toplink:list-container-policy">
    <toplink:collection-type>java.util.Vector</toplink:collection-type>
    </toplink:container>
    </toplink:read-all-query>
    </opm:querying>
    <opm:attribute-mappings>
    <opm:attribute-mapping xsi:type="toplink:direct-mapping">
    <opm:attribute-name>id</opm:attribute-name>
    <opm:field table="TRIP" name="ID" xsi:type="opm:column"/>
    <opm:attribute-classification>java.math.BigDecimal</opm:attribute-classification>
    </opm:attribute-mapping>
    <opm:attribute-mapping xsi:type="toplink:direct-mapping">
    <opm:attribute-name>lpn</opm:attribute-name>
    <opm:field table="TRIP" name="LPN" xsi:type="opm:column"/>
    <opm:attribute-classification>java.lang.String</opm:attribute-classification>
    </opm:attribute-mapping>
    <opm:attribute-mapping xsi:type="toplink:direct-mapping">
    <opm:attribute-name>startTime</opm:attribute-name>
    <opm:field table="TRIP" name="START_TIME" xsi:type="opm:column"/>
    <opm:attribute-classification>java.sql.Timestamp</opm:attribute-classification>
    </opm:attribute-mapping>
    <opm:attribute-mapping xsi:type="toplink:direct-mapping">
    <opm:attribute-name>expiryTime</opm:attribute-name>
    <opm:field table="TRIP" name="EXPIRY_TIME" xsi:type="opm:column"/>
    <opm:attribute-classification>java.sql.Timestamp</opm:attribute-classification>
    </opm:attribute-mapping>
    <opm:attribute-mapping xsi:type="toplink:direct-mapping">
    <opm:attribute-name>status</opm:attribute-name>
    <opm:field table="TRIP" name="STATUS" xsi:type="opm:column"/>
    <opm:attribute-classification>java.math.BigDecimal</opm:attribute-classification>
    </opm:attribute-mapping>
    </opm:attribute-mappings>
    <toplink:descriptor-type>independent</toplink:descriptor-type>
    <toplink:caching>
    <toplink:cache-type>weak-reference</toplink:cache-type>
    <toplink:always-refresh>true</toplink:always-refresh>
    </toplink:caching>
    <toplink:remote-caching>
    <toplink:cache-type>weak-reference</toplink:cache-type>
    </toplink:remote-caching>
    <toplink:instantiation/>
    <toplink:copying xsi:type="toplink:instantiation-copy-policy"/>
    <toplink:change-policy xsi:type="toplink:deferred-detection-change-policy"/>
    <toplink:tables>
    <toplink:table name="TRIP"/>
    </toplink:tables>
    </opm:class-mapping-descriptor>
    </opm:class-mapping-descriptors>
    </toplink:object-persistence>
    On deployment, this version of the BPEL process behaved as expected - only modifying the records with EXPIRY_TIME less thatn the literal time specified. (Also, I can't really pass in the time as a parameter as this is a polling model).
    Can anyone shed any light on what is happening or suggest how I might go about polling in the desired way?
    Cheers

    Please take a look at this article which states SYSDATE is not supported in a
    where clause.
    http://www.oracle.com/technology/pub/articles/bpel_cookbook/qualcomm-bpel.html
    Excerpt from the article:
    Here are three important things you should do in implementing the above design:
    Have the status of the record being processed stored in the database. The status includes the process state, next process attempt time, and processing attempt count.
    Create an updatable view that exposes only records that are ready to be processed. A view is needed because the database adapter cannot handle a where clause that compares against SYSDATE.
    Design logic that determines if a process instance that has faulted should be retried and when the retry should occur. This information will be updated in the database by use of a stored procedure. This can also be done with an update partner link and additional logic in BPEL.
    mahalo,
    a iii

  • [OLD-BPEL PM] DataBase Adapter 성능향상문제...

    댓글: 1 - 페이지: 1 - 마지막 글: 2006. 12. 9 오전 1:39 최종 작성자: champion 글타래(쓰레드): [ 이전 | 다음 ]
    iris
    글: 18
    등록일: 06. 11. 6
    DataBase Adapter 성능향상문제...
    게시일: 2006. 12. 8 오후 6:36 댓글
    Database Adapter를 이용해 다량의 Row를 Select해서 다른 Table에 Merge를
    해보았습니다.. 10만건을 test했는데 서버가 다운되더군요...
    5만건을 테스트했더니 서버가 엄청 버벅되더니 죽지는 않았는데 속도가
    상당히 많이 걸립니다... 이런건 해결할수 있는방법이 없나요?
    Polling관련 Tutorial을 보면 Performance관련 예제가 있던데 한번 따라해
    봤습니다.. Polling은 Wizard에서 MaxRaiseSize나 NumberOfThreads, MaxTransactionSize 같은 부분을 설정해 주는부분이 있습니다...
    polling을 사용하지않고 그냥 Custom Excute SQL을 사용해 DB에서 가져올때는
    이런 Performance향상을 위한부분이 Oracle BPEL에 있는지 궁금합니다..
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    그럼 답변 부탁드릴께요.. 감사합니다.. ^^
    champion
    글: 6
    등록일: 06. 10. 26
    Re: DataBase Adapter 성능향상문제...
    게시일: 2006. 12. 9 오전 1:39 iris 님의 질문에 답변 댓글
    XML 처리에 있어서 가장 문제가 되는 것은 Node의 Depth와 XML 자체 사이즈입니다. BPEL은 기본적으로 XML 연산을 많이 해야되기 때문에 항상 Variable을 Dom Object로 관리하고 특정 값을 구하거나 바꾸거나 하는 작업을 진행합니다. 따라서 DB의 Data를 가져오는데 있어서 중요한 성능 요인은 XML의 크기(Columns 곱하기 Rows)입니다. Column이야 필요한 것은 모두 가져와야 하니 당연히 Rows의 수를 조절하는 방법이 가장 효과적입니다. MaxRaiseSize가 이를 조절하는 Parameter고요 일반적으로 100 근처의 값을 사용합니다. 즉, 1000Rows가 처리되어야 한다고 가정할 때 MaxRaise가 100이면 10개의 BPEL Instance가 동시에 기동되어 처리되는 것입니다. 참고로 저희가 내부적으로 Notebook을 이용하여 DB2DB(Polling > Transformation > Merge) Test를 하면 분당 2만건 정도를 소화하더군요.
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    In the transform activity (xslt) you need to use the for-each expression for the repeating element.
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    cheers
    James

  • Urgent: "where" clause for polling database Adapter

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    Debashis

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    Please refer ..\SOA_HOME\bpel\samples\tutorials\122.DBAdapter\advanced\polling\PollingPureSQLOtherTableInsert Readme.txt and Note 873991.1 How To Use Custom SQL To Poll Database Tables Via Database Adapter LogicalDeletePollingStrategy.
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    thanks
    --debashis                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       

  • Poll Database Adapter Physicial Delete strategy

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