Why does Spring Data MongoDB not expose events for update…(…) methods?

Question

It appears that the update for mongoOperations do not trigger the events in AbstractMongoEventListener.

This post indicates that wa

Answer 1

I know it's too late to answer this Question, I have the same situation with MongoTemplate.findAndModify method and the reason I needed events is for Auditing purpose. here is what i did.

1.EventPublisher (which is ofc MongoTemplate's methods)

public class CustomMongoTemplate extends MongoTemplate {

    private ApplicationEventPublisher applicationEventPublisher;


    @Autowired
    public void setApplicationEventPublisher(ApplicationEventPublisher
                                                         applicationEventPublisher) {
        this.applicationEventPublisher = applicationEventPublisher;
    }

   //Default Constructor here

    @Override
    public  T findAndModify(Query query, Update update, Class entityClass) {
        T result = super.findAndModify(query, update, entityClass);

        //Publishing Custom Event on findAndModify
        if(result!=null && result instanceof Parent)//All of my Domain class extends Parent
            this.applicationEventPublisher.publishEvent(new AfterFindAndModify
                    (this,((Parent)result).getId(),
                            result.getClass().toString())
            );

        return result;
    } }

2.Application Event

public class AfterFindAndModify extends ApplicationEvent {

    private DocumentAuditLog documentAuditLog;

    public AfterFindAndModify(Object source, String documentId,
                            String documentObject) {
        super(source);
        this.documentAuditLog = new DocumentAuditLog(documentId,
                documentObject,new Date(),"UPDATE");
    }

    public DocumentAuditLog getDocumentAuditLog() {
        return documentAuditLog;
    }
}

3.Application Listener

public class FindandUpdateMongoEventListner implements ApplicationListener {

    @Autowired
    MongoOperations mongoOperations;

    @Override
    public void onApplicationEvent(AfterFindAndModify event) {
        mongoOperations.save(event.getDocumentAuditLog());
    }
}

and then

@Configuration
@EnableMongoRepositories(basePackages = "my.pkg")
@ComponentScan(basePackages = {"my.pkg"})
public class MongoConfig extends AbstractMongoConfiguration {

    //.....

    @Bean
    public FindandUpdateMongoEventListner findandUpdateMongoEventListner(){
        return new FindandUpdateMongoEventListner();
    }   

}