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Durable Message Driven Beans in WildFly

With Message Driven Beans (MDB’s) your Java application can respond to events send asynchronously. This can go via Queues, which allow your application to process events in parallel, and Topics which can be used to send one event to multiple applications/clients. MDB’s can be annotated to configure which JMS-Topic they should listen to. This is how that can be done:

@MessageDriven(name = "ExampleEventListener", activationConfig = {
    @ActivationConfigProperty(propertyName = "destinationType", propertyValue = "javax.jms.Topic"),
    @ActivationConfigProperty(propertyName = "destinationLookup", propertyValue = "/jms/topic/exampleEvents"),
    @ActivationConfigProperty(propertyName = "acknowledgeMode", propertyValue = "Auto-acknowledge") })
public class ExampleEventListener implements MessageListener {
    @Override
    public void onMessage(Message message) {
       // TODO: do something
    }
}

@MessageDriven(name = "ExampleEventListener", activationConfig = {

@ActivationConfigProperty(propertyName = "destinationType", propertyValue = "javax.jms.Topic"),

@ActivationConfigProperty(propertyName = "destinationLookup", propertyValue = "/jms/topic/exampleEvents"),

@ActivationConfigProperty(propertyName = "acknowledgeMode", propertyValue = "Auto-acknowledge") })

public class ExampleEventListener implements MessageListener {

@Override

public void onMessage(Message message) {

// TODO: do something

}

… Lees verder Durable Message Driven Beans in WildFly

Forward compatible messaging

If you have services or domains in your architecture, you probably have them to be able to develop them independently. In most cases, Message Queue’s are used to communicate between these services. But how does this work if one service upgrades the messages it is sending while the consuming services are still on an older version? In this blog post, we’ll … Lees verder Forward compatible messaging