spring boot2.0實現優雅停機的方法

前期踩的坑(spring boot 1.x)

1. 添加mavne依賴

<!-- springboot監控--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency>

2. 啟用shutdown

在配置文件裡添加下面的配置

#啟用shutdown endpoint的HTTP訪問endpoints.shutdown.enabled=true#不需要驗證endpoints.shutdown.sensitive=false

啟動的時候可以看到下面的日誌，就說明成功了

3. 優雅停機

發送POST請求http://localhost:8080/shutdown
如果響應碼是404 可以嘗試POST http://localhost:8080/actuator/shutdown

spring boot 2.0

如果你使用的spring boot版本是2.x的就會發現，這些POST請求都會出現404的結果。

下面是spring boot 2.0 優雅停機的實現方式。

1.修改Application啟動類

tomcat容器

@SpringBootApplicationpublic class ShutdownApplication { public static void main(String[] args) { SpringApplication.run(ShutdownApplication.class, args); } /** * 用於接受shutdown 事件*/ @Bean public GracefulShutdown gracefulShutdown() { return new GracefulShutdown(); } /** * 配置tomcat * * @return */ @Bean public ServletWebServerFactory servletContainer() { TomcatServletWebServerFactory tomcat = new TomcatServletWebServerFactory(); tomcat.addConnectorCustomizers(gracefulShutdown()); return tomcat; } /** * 優雅關閉Spring Boot。容器必須是tomcat */ private class GracefulShutdown implements TomcatConnectorCustomizer, ApplicationListener<ContextClosedEvent> { private final Logger log = LoggerFactory.getLogger(GracefulShutdown.class); private volatile Connector connector; private final int waitTime = 10; @Override public void customize(Connector connector) { this.connector = connector; } @Override public void onApplicationEvent(ContextClosedEvent contextClosedEvent) { this.connector.pause(); Executor executor = this.connector.getProtocolHandler().getExecutor(); if (executor instanceof ThreadPoolExecutor) { try { ThreadPoolExecutor threadPoolExecutor = (ThreadPoolExecutor) executor; threadPoolExecutor.shutdown(); if (!threadPoolExecutor.awaitTermination(waitTime, TimeUnit.SECONDS)) { log.warn("Tomcat 進程在" + waitTime + " 秒內無法結束，嘗試強制結束"); } } catch (InterruptedException ex) { Thread.currentThread().interrupt(); } } } }}

Undertow容器(沒有使用過，不保證可用)

 @SpringBootApplicationpublic class Application { public static void main(String[] args) { SpringApplication.run(Application.class, args); } /** * 優雅關閉Spring Boot */ @Component public class GracefulShutdown implements ApplicationListener<ContextClosedEvent> { @Autowired private GracefulShutdownWrapper gracefulShutdownWrapper; @Autowired private ServletWebServerApplicationContext context; @Override public void onApplicationEvent(ContextClosedEvent contextClosedEvent){ gracefulShutdownWrapper.getGracefulShutdownHandler().shutdown(); try { UndertowServletWebServer webServer = (UndertowServletWebServer)context.getWebServer(); Field field = webServer.getClass().getDeclaredField("undertow"); field.setAccessible(true); Undertow undertow = (Undertow) field.get(webServer); List<Undertow.ListenerInfo> listenerInfo = undertow.getListenerInfo(); Undertow.ListenerInfo listener = listenerInfo.get(0); ConnectorStatistics connectorStatistics = listener.getConnectorStatistics(); while (connectorStatistics.getActiveConnections() > 0){} }catch (Exception e){ // Application Shutdown } } } @Component public class GracefulShutdownWrapper implements HandlerWrapper{ private GracefulShutdownHandler gracefulShutdownHandler; @Override public HttpHandler wrap(HttpHandler handler) { if(gracefulShutdownHandler == null) { this.gracefulShutdownHandler = new GracefulShutdownHandler(handler); } return gracefulShutdownHandler; } public GracefulShutdownHandler getGracefulShutdownHandler() { return gracefulShutdownHandler; } } @Component @AllArgsConstructor public class UndertowExtraConfiguration { private final GracefulShutdownWrapper gracefulShutdownWrapper; @Bean public UndertowServletWebServerFactory servletWebServerFactory() { UndertowServletWebServerFactory factory = new UndertowServletWebServerFactory(); factory.addDeploymentInfoCustomizers(deploymentInfo -> deploymentInfo.addOuterHandlerChainWrapper(gracefulShutdownWrapper)); factory.addBuilderCustomizers(builder -> builder.setServerOption(UndertowOptions.ENABLE_STATISTICS, true)); return factory; } }}

2. 使用kill命令殺死進程

使用下面的命令殺死進程。該命令是向某個進程發送終止信號。

 kill -15 [PID]

以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持武林網。