平滑退出,增加处理失败时的非正常退出.

src/main/java/cn/quantgroup/tech/shutdown/DefaultSignalHandler.java

@@ -23,24 +23,33 @@ public class DefaultSignalHandler implements SignalHandler {
 
     @Override
     public void handle(Signal signal) {
-        String applicationName = context.getApplicationName();
-        log.info("开始执行停止{}服务", applicationName);
-        GracefulShutdownProperties bean = context.getBean(GracefulShutdownProperties.class);
         try {
-            context.getBean(Shutdown.class).shutdown(bean.getTimeout());
-            log.info("servlet container 停止接收请求");
-        } catch (InterruptedException e) {
-        }
-
-        Thread.getAllStackTraces().forEach((thread, stackTraceElements) -> {
-            if (!thread.isDaemon()) {
-                //如果中断 daemon 线程, 会导致 PreDestroy 方法不执行,
-                //如果不中断 non-daemon 线程, 会导致无法 exit(0).
-                log.debug("中断正在进行的 non-daemon 线程: {} ; {}", thread.getId(), thread.getName());
-                thread.interrupt();
+            String applicationName = context.getApplicationName();
+            log.info("开始执行停止{}服务", applicationName);
+            GracefulShutdownProperties bean = context.getBean(GracefulShutdownProperties.class);
+            try {
+                context.getBean(Shutdown.class).shutdown(bean.getTimeout());
+                log.info("servlet container 停止接收请求");
+            } catch (InterruptedException e) {
             }
-        });
-        log.info("{} 即将执行 @PreDestroy 方法", applicationName);
-        System.exit(0);
+
+            Thread.getAllStackTraces().forEach((thread, stackTraceElements) -> {
+                if (!thread.isDaemon()) {
+                    //如果中断 daemon 线程, 会导致 PreDestroy 方法不执行,
+                    //如果不中断 non-daemon 线程, 会导致无法 exit(0).
+                    log.debug("中断正在进行的 non-daemon 线程: {} ; {}", thread.getId(), thread.getName());
+                    thread.interrupt();
+                }
+            });
+            log.info("{} 即将执行 @PreDestroy 方法", applicationName);
+            System.exit(0);
+        } catch (Exception e) {
+            // 此处可能导致异常的里面包含了logback中类未能找到, 所以增加输出到控制台.
+            System.out.println(e.getMessage());
+            log.error(e.getMessage(), e);
+        } finally {
+            System.out.println("强制退出.");
+            System.exit(1);
+        }
     }
 }