How to get hazelcast instance in lifecycle listener?

[Igor Aptekar]

I need to run some code when my client connects to a hazelcast cluster. I have added my lifecycle listener to the hazelcast listener config. The listener is made HazelcastInstanceAware because I need a hazelcast instance to create an executor to run my code on. However, the instance is never set. Is there a way to do this? It does work if I set the listener via the lifecycle service on the hazelcast instance - but by then I find it's too late and i have missed the client connection event.

cheers

[vass...@hazelcast.com]

Hi Igor,

thanks for your post. Injection of HazelcastInstance in HazelcastInstanceAware classes does not currently work for LifecycleListener or ClientListeners. The javadoc for HazelcastInstanceAware reads "Used to get HazelcastInstance reference when submitting a Runnable/Callable using Hazelcast ExecutorService.", however it would certainly be useful to have the HazelcastInstance set in Lifecycle/ClientListeners, so please open an issue on github (https://github.com/hazelcast/hazelcast/issues) for this enhancement.

Cheers!

Vassilis

[mann]

Hi Vass,

Do we have this feature available now? I am using 3.7.1 enterprise version of Hazelcast.

[Vassilis Bekiaris]

Hi Mann,

yes, HazelcastInstance is injected in a LifecycleListener when you declare it in your Config either as implementation or by class name. Both of the following work in 3.7.1:

public class HzAwareListener implements HazelcastInstanceAware, LifecycleListener {
...
}
// set implementation to an existing instance of your listener class
Config cfg  = new Config();
cfg.addListenerConfig(new ListenerConfig().setImplementation(new HzAwareListener()));
HazelcastInstance hz = Hazelcast.newHazelcastInstance(cfg);

// set class name in listener config; an instance will be created by Hazelcast
Config cfg  = new Config();
cfg.addListenerConfig(new ListenerConfig().setClassName("org.domain.HzAwareListener"));
HazelcastInstance hz = Hazelcast.newHazelcastInstance(cfg);

Best,

Vassilis

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[mann]

Hi Vass,

thanks for quick reply.

Just to be more specific, is this feature only on LifecycleListener? I need this for EntryAddedListener, EntryUpdatedListener.

[Vassilis Bekiaris]

Hi Mann,

yes, it works the same for entry listeners you configure in your MapConfig's.

Best,
Vassilis