Trouble using two different databases in Mule JDBC flow - mysql

Question

I have two JDBC flows in Mule 3.2.0, one using MySQL database and other using SQLServer database.
<mule ...
<spring:bean id="MySQL-jdbcDataSource"
class="org.enhydra.jdbc.standard.StandardDataSource" destroy-method="shutdown">
<spring:property name="driverName"
value="com.mysql.jdbc.Driver" />
<spring:property name="url"
value="jdbc:mysql://host:port/schema" />
</spring:bean>
<jdbc:connector name="MySQL-jdbcConnector"
dataSource-ref="MySQL-jdbcDataSource" pollingFrequency="${MySQL.db.poll}"
transactionPerMessage="false">
<jdbc:query key="read" value="${MySQL.db.jdbc_query}" />
</jdbc:connector>
<flow name="MySQL-flow">
<jdbc:inbound-endpoint queryKey="read"
connector-ref="MySQL-jdbcConnector">
<jdbc:transaction action="ALWAYS_BEGIN"/>
<property key="receiveMessageInTransaction" value="true"/>
</jdbc:inbound-endpoint>
<vm:outbound-endpoint path="path" connector-ref="first-level">
<message-properties-transformer scope="outbound">
<add-message-property key="identifier" value="MySQL"/>
</message-properties-transformer>
<vm:transaction action="NONE"/>
</vm:outbound-endpoint>
</flow>
</mule>
And
<mule ...
<spring:bean id="SQLServer-jdbcDataSource"
class="org.enhydra.jdbc.standard.StandardDataSource" destroy-method="shutdown">
<spring:property name="driverName"
value="com.microsoft.sqlserver.jdbc.SQLServerDriver" />
<spring:property name="url"
value="jdbc:sqlserver://host:port;databaseName=schema" />
</spring:bean>
<jdbc:connector name="SQLServer-jdbcConnector"
dataSource-ref="SQLServer-jdbcDataSource" pollingFrequency="${SQLServer.db.poll}"
transactionPerMessage="false">
<jdbc:query key="read" value="${SQLServer.db.jdbc_query}" />
</jdbc:connector>
<flow name="SQLServer-flow">
<jdbc:inbound-endpoint queryKey="read"
connector-ref="SQLServer-jdbcConnector">
<jdbc:transaction action="ALWAYS_BEGIN"/>
<property key="receiveMessageInTransaction" value="true"/>
</jdbc:inbound-endpoint>
<vm:outbound-endpoint path="${sv.vm.queue.name}" connector-ref="first-level-xform">
<message-properties-transformer scope="outbound">
<add-message-property key="${sv.vm.msg.identifier}" value="SQLServer"/>
</message-properties-transformer>
<vm:transaction action="NONE"/>
</vm:outbound-endpoint>
</flow>
</mule>
When I deploy any one of these floes in mule-deploy.properties, it runs ok. But when I deploy both of these flows at the same time, none of them works. I do not get any error or exception, but it seems like none of these flows run.
Any ideas what might be wrong? Probably something related to JDBC transactions?

Answer 1

if you have 2 different flows in same application .. then remove :-
<spring:bean id="SQLServer-jdbcDataSource"
class="org.enhydra.jdbc.standard.StandardDataSource" destroy-method="shutdown">
<spring:property name="driverName"
value="com.microsoft.sqlserver.jdbc.SQLServerDriver" />
<spring:property name="url"
value="jdbc:sqlserver://host:port;databaseName=schema" />
</spring:bean>
<jdbc:connector name="SQLServer-jdbcConnector"
dataSource-ref="SQLServer-jdbcDataSource" pollingFrequency="${SQLServer.db.poll}"
transactionPerMessage="false">
<jdbc:query key="read" value="${SQLServer.db.jdbc_query}" />
</jdbc:connector>
from any of the flow ... Since it is declared as global ... it can be used from any of the flow in the application .. what I mean is .. just remove the above line of code from one of the flow ... since you have declared in both the flow I guess it's a duplicate and not required to place in each and every flow ... and yes just mention the reference connector-ref="SQLServer-jdbcConnector" in both the mule flow ... ex:-
<jdbc:inbound-endpoint queryKey="read"
connector-ref="SQLServer-jdbcConnector">