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B.7. PostgreSQL

Example B.23. PostgreSQL Local-TX Datasource

<?xml version="1.0" encoding="UTF-8"?>

<datasources>
  <local-tx-datasource>
    <jndi-name>PostgresDS</jndi-name>
    <connection-url>jdbc:postgresql://[servername]:[port]/[database name]</connection-url>
    <driver-class>org.postgresql.Driver</driver-class>
    <user-name>x</user-name>
    <password>y</password>
    <!-- sql to call when connection is created
	 <new-connection-sql>some arbitrary sql</new-connection-sql>
    -->

    <!-- sql to call on an existing pooled connection when it is obtained from pool 
	 <check-valid-connection-sql>some arbitrary sql</check-valid-connection-sql>
    -->

    <!-- corresponding type-mapping in the standardjbosscmp-jdbc.xml (optional) -->
    <metadata>
      <type-mapping>PostgreSQL 8.0</type-mapping>
    </metadata>
  </local-tx-datasource>

</datasources>
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Important

XA Transactions are denied if max_prepared_transactions uses the default value (0) in PostgreSQL v8.4 and v8.2.
PostgreSQL user documentation recommends you set the max_prepared_transactions value to meet or exceed the value of max_connections so every session can have a prepared transaction pending.
For more information, refer to the PostgreSQL v8.4 User Documentation, located at http://www.postgresql.org/docs/8.4/interactive/runtime-config-resource.html#GUC-MAX-PREPARED-TRANSACTIONS

Example B.24. PostgreSQL XA Datasource

This configuration works for PostgreSQL 8.x and later. 
<?xml version="1.0" encoding="UTF-8"?>

<datasources>
  <xa-datasource>
    <jndi-name>PostgresDS</jndi-name>

    <xa-datasource-class>org.postgresql.xa.PGXADataSource</xa-datasource-class>
    <xa-datasource-property name="ServerName">[servername]</xa-datasource-property>
    <xa-datasource-property name="PortNumber">5432</xa-datasource-property>

    <xa-datasource-property name="DatabaseName">[database name]</xa-datasource-property>
    <xa-datasource-property name="User">[username]</xa-datasource-property>
    <xa-datasource-property name="Password">[password]</xa-datasource-property>

    <track-connection-by-tx></track-connection-by-tx>
  </xa-datasource>
</datasources>
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