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Bernd Breier

Bernd Breier

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  • Install WebLogic and configure a WebLogic domain with an AdminServer.

  • Prepare oracle database and deploy camunda to the WebLogic AdminServer as described in https://docs.camunda.org/manual/7.7/installation/full/wls/manual/ . This involves creation of schema camunda and the camunda tables as well as the dataSource for camunda.

  • Create a new schema for the outbox tables:

    • Log into SQL Plus (sys as sysdba) and create user TASKANA_TABLES for the outbox schema

      Code Block
      > ALTER SESSION SET "_ORACLE_SCRIPT"= TRUE;
> Create USER TASKANA_TABLES identified by <password for TASKAN_TABLES>

    • Log into SQLPlus as user taskana_tables

    • create schema taskana_tables via taskana-outbox-schema-oracle.sql script from the sql directory of taskana-adapter-camunda-listener-<version>.jar. Before running the script, change
      %schemaName% --> TASKANA_TABLES
      %camundaSchemaName% --> CAMUNDA

    • grant rights to camunda

      Code Block
       GRANT INSERT,UPDATE,SELECT,DELETE ON TASKANA_TABLES.OUTBOX_SCHEMA_VERSION  to camunda;
 GRANT INSERT,UPDATE,SELECT,DELETE ON TASKANA_TABLES.EVENT_STORE  to camunda;
 GRANT CONNECT, RESOURCE, DBA TO camunda

  • Enable Taskana ParseListener and TaskListener:

    • copy taskana-adapter-camunda-listener-<version>.jar to <WebLogicDomainRoot>/lib

    • copy slf4j-api-1.7.30.jar and slf4j-simple-1.7.30.jar to <WebLogicDomainRoot>/lib to enable log entries from the taskana components.

    • find camunda-oracle-weblogic-service.jar in the subtree below <WebLogicDomainRoot>. We found it at <WebLogic-Domain>\servers\AdminServer\tmp_WL_user\camunda-bpm-platform\o3p2c6.
      Edit this jar file, navigate to META-INF and modify META-INF/bpm-platform.xml
      Add the taskana engine plugin:
      <plugin>
      <class>pro.taskana.adapter.camunda.parselistener.TaskanaParseListenerProcessEnginePlugin</class>
      </plugin>
      in the plugins section.
      You might prefer to modify bpm-platform.xml in the downloaded Camunda distribution for WebLogic. In this distribution, you find bpm-platform.xml in the "modules\camunda-oracle-weblogic-ear-$VERSION.ear\camunda-oracle-weblogic-service.jar\META-INF" folder. If you modify bpm-platform.xml in this location, you must do it before you install camunda to WebLogic.

    • Supply an external common property file for the ParseListener, TaskListener and the outbox REST api:

      • create 'properties - directory', e.g. <WebLogicDomainRoot>/taskanaconfig

      • modify <WebLogic-DomainROOT>/bin/setDomainEnv.cmd. 'Un-comment' the line that sets the PATCH_CLASSPATH and edit it so that it points to the fully qualified pathname of the 'properties - direcotory'

      • Place taskana-outbox.properties into the 'properties - directory'. This property file must contain the properties

        • taskana.adapter.outbox.schema (taskana-tables, the schema name of the outbox tables),

        • taskana.adapter.outbox.datasource.jndi (the jndi name of the datasource that can be used to access the outbox tables. You can use camunda's datasource or define an own one).

        • and it should contain the property taskana.adapter.create_outbox_schema=false, since this schema was created manually

  • Start WebLogic and install taskana-adapter-camunda-outbox-rest-<version>.war via the WebLogic admin console

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