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  • Mongo Event Listener Problem

    How do i register the mongo event listener ?

    I tried this :

    public class MyListener extends AbstractMongoEventListener<BeforeSaveEvent<MyDomainModelThatIsSaved>> {
    	public void onBeforeSave(BeforeSaveEvent<MyDomainModelThatIsSaved> source, DBObject dbo) {
    		System.out.println("saving : " + dbo);
    		System.out.println("saving : " + dbo.toMap());
    		throw new RuntimeException("hehehe");
    and register it to my springContext.xml :
    HTML Code:
    <bean id="myListener" class="my.package.MyListener" />
    And it doesnt work. The logging is not appearing, the exception is not thrown.

    I tried using extends AbstractMongoEventListener without any diamond generic type, an NPE occurs when the bean is being loaded <-- which proofs that the listener bean is loaded.

    What did i miss ?

    Thank you !

  • #2
    You have to type the AMEL to your domain type directly, not wrapped inside the event. So

    public class MyListener extends AbstractMongoEventListener<MyDomainModelThatIsSaved> {
    should do the trick. Regarding the NullPointException I created a ticket [0] and have fixed it [1] on our side. Downside is that we're stumbling over a bug in GenericTypeResolver [2] now producing another NullPointException. This will be fixed in 3.0.7 and already has been since 3.1.0.RC1. So you're actually only safe against the NPW with a recent 3.1 Spring version but we recommend typing the implementation class anyway.



    • #3
      It works fine now.

      Thank you !