HazelcastAPI NodeShutdownHookThread

Giriş

Şu satırı dahil ederiz

import com.hazelcast.instance.imp.NodeShutdownHookThread;

Örnek

Şöyle yaparız. Böylece kill -15 ile SIGTERM gönderilirse graceful shutdown yapılır

<property name="hazelcast.shutdownhook.enabled">true</property>
<property name="hazelcast.shutdownhook.policy">GRACEFUL</property>

Açıklaması şöyle

... when the process is terminated by SIGTERM the JVM invokes registered shutdown hooks with no defined sequence (or maybe even in parallel).

So our own shutdown hook that handles graceful shutdown may run in parallel or after a shutdown hook registered by the logging implementation that closes loggers 

Kod şöyle

switch (policy) {
  case TERMINATE:
    hazelcastInstance.getLifecycleService().terminate();
    break;
  case GRACEFUL:
    hazelcastInstance.getLifecycleService().shutdown();
    break;
  default:
    throw new IllegalArgumentException("Unimplemented shutdown hook policy: " + policy);
}