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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
在配置文件里添加下面的配置
#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志，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
@SpringBootApplication
public class ShutdownApplication {
public static void main(String[] args) {
SpringApplication.run(ShutdownApplication.class, args);
}
/**
* 用于接受 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)
@SpringBootApplication
public 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億速云。
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