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The JMS message store persists messages in a JMS queue inside a JMS Broker. The JMS message store can be configured by specifying the class as org.apache.synapse.message.store.impl.jms.JmsStore. Since the JMS message stores persist messages in a JMS queue in an ordered manner, JMS message stores can be used to implement the store-and-forward pattern.

Explained below are the parameters you need to configure for a JMS Message Store. Also, find details of other configurations that are relevant to the JMS Message Store. See the following topics for details:

JMS Message Store parameters

Use one of the following links for instructions on how to create a message store artifact for the ESB. Be sure to set the message store type as JMS Message Store, and configure the parameters as explained below.

  1. Using WSO2 EI Tooling.
  2. Using the management console.

Listed below are the required parameters for configuring the JMS Message Store.

Parameter Name

Description

Message Store NameGive a unique name for the JMS message store
Message Store typeSelect JMS Message Store from the list of options.
Initial Context FactoryThe URL of the JNDI provider.
Provider URLThe password to connect to the broker.

If you need to ensure guaranteed delivery of your messages, specify values for the following parameters:

Parameter Name

Description

Enable Producer Guaranteed DeliveryThis flag specifies whether guaranteed delivery is enabled on the producer side. The value is set to False, by default.
Failover Message StoreThe message store to which the store mediator should send messages when the original message store fails.

If required, you can configure the optional parameters listed below.

Parameter Name

Value

JNDI Queue Name (store.jms.destination)The message store queue name. Though this is not a required parameter, we recommend specifying a value for this.
Connection factory (store.jms.connection.factory)The JNDI name of the connection factory that is used to create JMS connections. Though this is not a required parameter, we recommend specifying a value for this.
User Name (store.jms.username) The username to connect to the broker. This value is not required.
Password (store.jms.password) The password to connect to the broker. This value is not required
JMS API Specification Version (store.jms.JMSSpecVersion)The JMS API version to be used. Possible values are 1.1 or 1.0. By default, the value is set to 1.1.
vender.class.loader.enabledSet to false when using IBM MQ, which requires skipping the external class loader.

Individual message priorities can be set using the following property on the provider. For example, the value can be 0-9 for ActiveMQ.

<property name="JMS_PRIORITY" value="9" scope="axis2"/>

Following is a sample JMS message store configuration that uses ActiveMQ as the message broker:

<messageStore name="JMSMS" class="org.apache.synapse.message.store.impl.jms.JmsStore" xmlns="http://ws.apache.org/ns/synapse">
   <parameter name="java.naming.factory.initial">org.apache.activemq.jndi.ActiveMQInitialContextFactory</parameter>
   <parameter name="java.naming.provider.url">tcp://localhost:61616</parameter>
   <parameter name="store.jms.destination">ordersQueue</parameter>
   <parameter name="store.jms.connection.factory">QueueConnectionFactory</parameter>
   <parameter name="store.jms.JMSSpecVersion">1.1</parameter>
</messageStore>

Other configurations

If you are using ActiveMQ 5.12.2 and above, you need to set the following system property on server startup for JMS message store to work as expected.

-Dorg.apache.activemq.SERIALIZABLE_PACKAGES="*"

This is required because users are enforced to explicitly whitelist packages that can be exchanged using ObjectMessages. Due to this restriction, the message processor fails to read messages from ActiveMQ with the following error:

ERROR - JmsConsumer [JMS-C-1] cannot receive message from store. Error:Failed to build body from content. Serializable class not available to broker. Reason: java.lang.ClassNotFoundException: Forbidden class org.apache.synapse.message.store.impl.commons.StorableMessage! This class is not trusted to be serialized as ObjectMessage payload.

Note

When you configure a JMS message store with the ActiveMQ, you need to copy the required client libraries to the <EI_HOME>/lib directory. If the relevant client libraries are not copied, you will see a java.lang.ClassNotFoundException. 

For information on the client libraries that you need to copy when configuring a JMS message store with ActiveMQ, see Configure with ActiveMQ.

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