ch.sbb.esta.openshift.gracefullshutdown

Class GracefulShutdownHook

java.lang.Object

ch.sbb.esta.openshift.gracefullshutdown.GracefulShutdownHook

All Implemented Interfaces:

Runnable

public class GracefulShutdownHook
extends Object
implements Runnable

The Shutdownhook will gracefully shutdown the app. When a SIGTERM Signal comes to the JVM, the run() will be executed. 1. The Actuator Healthcheck will be down if actuator is used otherwise your implemented ProbeController Rest Service /ready is set to false so it will return 404 2. Thread.wait with the configured wait time will cause the shutdownprocess to wait. This is necessary to give Openshift time to execute the readyness Probe. Once the readynessprobe is false, Openshift Removes the Pod for future Requests 3. All Open Requests will be finished. 4. After waiting the configured estaGracefulShutdownWaitSeconds, the applicationContext will be closed.

For the ShutdownHook to work, you need to provide a ProbeController for the readyness and liveness probe which must implement the interface IProbeController

Author:

ue64007

Field Summary

Fields

Modifier and Type	Field and Description
protected static String	GRACEFUL_SHUTDOWN_WAIT_SECONDS

Constructor Summary

Constructors

Constructor and Description
GracefulShutdownHook(org.springframework.context.ConfigurableApplicationContext applicationContext)

Method Summary

Modifier and Type	Method and Description
void	run() Will first set the readyness or healthchecks to false.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

GRACEFUL_SHUTDOWN_WAIT_SECONDS

protected static final String GRACEFUL_SHUTDOWN_WAIT_SECONDS

See Also:

Constant Field Values

Constructor Detail

GracefulShutdownHook

public GracefulShutdownHook(org.springframework.context.ConfigurableApplicationContext applicationContext)

Method Detail

run

public void run()

Will first set the readyness or healthchecks to false. You can implement your own RestController which implements the IProbeController After the Application will wait for the configured timeout till it finally shutdown the spring context.

Specified by:

run in interface Runnable