zhengyangyong opened a new pull request #693: [SCB-548] support gracefully shutdown URL: https://github.com/apache/incubator-servicecomb-java-chassis/pull/693 Signed-off-by: zhengyangyong <yangyong.zh...@huawei.com> Follow this checklist to help us incorporate your contribution quickly and easily: - [x] Make sure there is a [JIRA issue](https://issues.apache.org/jira/browse/SCB) filed for the change (usually before you start working on it). Trivial changes like typos do not require a JIRA issue. Your pull request should address just this issue, without pulling in other changes. - [x] Each commit in the pull request should have a meaningful subject line and body. - [x] Format the pull request title like `[SCB-XXX] Fixes bug in ApproximateQuantiles`, where you replace `SCB-XXX` with the appropriate JIRA issue. - [x] Write a pull request description that is detailed enough to understand what the pull request does, how, and why. - [x] Run `mvn clean install` to make sure basic checks pass. A more thorough check will be performed on your pull request automatically. - [x] If this contribution is large, please file an Apache [Individual Contributor License Agreement](https://www.apache.org/licenses/icla.pdf). --- When user call system.exit(0),these three works will do: 1.Unregister microservice instance from Service Center: this work will do by process ContextClosedEvent, we need unregister immediately for stopping provide service any more. 2.Waiting for all invocations to finish: this work will do by ShutdownHandler, when all invocations finished or 'deadline time reached', cc and transport vertx threads will close. 3.All spring bean do close process we had registerShutdownHook for spring ApplicationContext and beans can define 'destroy-method' do cleaning. here is example: Spring mvc Hello Java Chassis Pojo Hello person ServiceComb/Java Chassis Jaxrs Hello person ServiceComb/Java Chassis Spring mvc Hello person ServiceComb/Java Chassis 2018-05-09 16:02:14,288 [WARN] handler chain is shutting down org.apache.servicecomb.core.handler.ShutdownHookHandler.run(ShutdownHookHandler.java:87) 2018-05-09 16:02:14,289 [INFO] Closing org.springframework.context.support.ClassPathXmlApplicationContext@7cf10a6f: startup date [Wed May 09 16:02:05 CST 2018]; root of context hierarchy org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:984) 2018-05-09 16:02:14,290 [WARN] cse is closing now... org.apache.servicecomb.core.CseApplicationListener.onApplicationEvent(CseApplicationListener.java:148) 2018-05-09 16:02:14,291 [INFO] service center task is shutdown. org.apache.servicecomb.serviceregistry.registry.RemoteServiceRegistry.onShutdown(RemoteServiceRegistry.java:72) 2018-05-09 16:02:14,295 [WARN] handler chain is shut down org.apache.servicecomb.core.handler.ShutdownHookHandler.run(ShutdownHookHandler.java:103) 2018-05-09 16:02:14,296 [INFO] Unregister microservice instance success. microserviceId=90b76fd551c511e8b51db4b676a39f40 instanceId=481f630d535f11e8bc19b4b676a39f40 org.apache.servicecomb.serviceregistry.registry.AbstractServiceRegistry.unregisterInstance(AbstractServiceRegistry.java:232) Process finished with exit code 0
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