2.5. Configuring a Datasource for JBoss Enterprise Web Server

Procedure 2.3. Configuring a datasource for JBoss Enterprise Web Server

1. Copy the MySQL driver to tomcat6/lib/
2. Configure the datasource resources in tomcat6/conf/context.xml:

   <Resource name="jdbc/jbpmDS" auth="Container" type="javax.sql.DataSource" factory="bitronix.tm.resource.ResourceObjectFactory" uniqueName="jdbc/jbpmDS"/>
   
   <Resource name="jdbc/jbpmTasksDS" auth="Container" type="javax.sql.DataSource" factory="bitronix.tm.resource.ResourceObjectFactory" uniqueName="jdbc/jbpmTasksDS"/>
   

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3. Edit the tomcat6/webapps/business-central-server.war/WEB-INF/Classes/META-INF/persistence.xml file to include the unique name from context.xml:

   		<jta-data-source>java:/comp/env/jdbc/jbpmDS</jta-data-source>  
   ...
   <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/> 
   <property name="hibernate.transaction.manager_lookup_class" value="org.hibernate.transaction.BTMTransactionManagerLookup" />
   

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4. Edit the tomcat6/webapps/jbpm-human-task.war/WEB-INF/classes/META-INF/persistence.xml file to include the unique name from context.xml:

   <jta-data-source>java:/comp/env/jdbc/jbpmTasksDS</jta-data-source>  
   ...
   <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/> 
   <property name="hibernate.transaction.manager_lookup_class" value="org.hibernate.transaction.BTMTransactionManagerLookup" />
   

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5. JBoss Enterprise Web Server does not include a transaction manager. The following example shows the configuration for Bitronix, and it is provided for evaluation purposes only. Bitronix can be downloaded from http://docs.codehaus.org/display/BTM/Home.

   	#file resources.properties
   	resource.ds1.className=com.mysql.jdbc.jdbc2.optional.MysqlXADataSource
   	resource.ds1.uniqueName=jdbc/jbpmDS
   	resource.ds1.minPoolSize=0
   	resource.ds1.maxPoolSize=10
   	resource.ds1.driverProperties.user=guest
   	resource.ds1.driverProperties.password=guest
   	resource.ds1.driverProperties.URL=jdbc:mysql://localhost:3306/jbpmprocess
   	resource.ds1.allowLocalTransactions=true
   
   	resource.ds2.className=com.mysql.jdbc.jdbc2.optional.MysqlXADataSource
   	resource.ds2.uniqueName=jdbc/jbpmTasksDS
   	resource.ds2.minPoolSize=0
   	resource.ds2.maxPoolSize=10
   	resource.ds2.driverProperties.user=guest
   	resource.ds2.driverProperties.password=guest
   	resource.ds2.driverProperties.URL=jdbc:mysql://localhost:3306/jbpmtasks
   	resource.ds2.allowLocalTransactions=true
   

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6. To configure the Bitronix transaction manager, create a tomcat6/conf/btm-config.properties file:

   bitronix.tm.serverId=tomcat-btm-node0
   bitronix.tm.journal.disk.logPart1Filename=${btm.root}/work/btm1.tlog
   bitronix.tm.journal.disk.logPart2Filename=${btm.root}/work/btm2.tlog
   bitronix.tm.resource.configuration=${btm.root}/conf/resources.properties

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   Add the following line to tomcat6/conf/context.xml:

   <Transaction factory="bitronix.tm.BitronixUserTransactionObjectFactory"/>

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   Add the following line to tomcat6/conf/server.xml

   <Listener className="bitronix.tm.integration.tomcat55.BTMLifecycleListener"/>

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   Create a configuration properties file. On unix based systems the file should be tomcat6/setenv.sh, and on Windows systems the file should be tomcat6/setenv.bat.

   CATALINA_OPTS="-Dbtm.root=$CATALINA_HOME -Dbitronix.tm.configuration=$CATALINA_HOME/conf/btm-config.properties"

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