How to add an EventNotifier to Camel using Main class standalone

问题

I'm trying to add an EventNotifier to my Apache Camel standalone application which uses the Main class from Camel.

http://camel.apache.org/running-camel-standalone-and-have-it-keep-running.html

public void boot() throws Exception {
    Main main = new Main();
    main.addRouteBuilder(new MyRouteBuilder());
    System.out.println("Starting Camel. Use ctrl + c to terminate the JVM.\n");
    main.run();
}

I want to add an EventNotifier like in this cookbook example:

http://camel.apache.org/eventnotifier-to-log-details-about-all-sent-exchanges.html

Here is my simple EventNotifier

@Override
public void notify(EventObject event) throws Exception {
    logger.info(event.toString());
}

@Override
public boolean isEnabled(EventObject event) {
    logger.info("Checked if enabled");
    return true;
}

Using Java DSL, I want to do something like:

context.getManagementStrategy().addEventNotifier(new MyEventNotifier());

There are a few methods on Main that seems like they would be helpful: main.getOrCreateCamelContext() and main.getCamelContexts().

getOrCreateCamelContext will create a context but when main.run() is called, that context goes away (Camel-1 and is the only context but after main.run(), Camel-2 is the only context).

getCamelContexts is empty until main.run() is called.

I tried adding the EventNotifier in another thread after the context is created by Main but nothing shows in my log so I suspect the EventNotifier needs to be added before the context is started.

Is there an easy way to do that?

回答1:

I found one way: create an anonymous inner class and override the postProcessCamelContext method.

    Main main = new Main() {
        @Override
        protected void postProcessCamelContext(CamelContext camelContext) throws Exception {
            super.postProcessCamelContext(camelContext);
            camelContext.getManagementStrategy().addEventNotifier(new MyEventNotifier());
        }
    };

来源：https://stackoverflow.com/questions/30354698/how-to-add-an-eventnotifier-to-camel-using-main-class-standalone

标签

apache-camel