| /* |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| */ |
| package org.apache.qpid.thread; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.lang.Thread.UncaughtExceptionHandler; |
| |
| /** |
| * |
| * An {@link UncaughtExceptionHandler} that writes the exception to the application log via |
| * the SLF4J framework. Once registered with {@link Thread#setUncaughtExceptionHandler(UncaughtExceptionHandler)} |
| * it will be invoked by the JVM when a thread has been <i>abruptly</i> terminated due to an uncaught exception. |
| * Owing to the contract of {@link Runnable#run()}, the only possible exception types which can cause such a termination |
| * are instances of {@link RuntimeException} and {@link Error}. These exceptions are catastrophic and the client must |
| * restart the JVM. |
| * <p> |
| * The implementation also invokes {@link ThreadGroup#uncaughtException(Thread, Throwable)}. This |
| * is done to retain compatibility with any monitoring solutions (for example, log scraping of |
| * standard error) that existing users of older Qpid client libraries may have in place. |
| * |
| */ |
| public class LoggingUncaughtExceptionHandler implements UncaughtExceptionHandler |
| { |
| private static final Logger _logger = LoggerFactory.getLogger(LoggingUncaughtExceptionHandler.class); |
| |
| @Override |
| public void uncaughtException(Thread t, Throwable e) |
| { |
| try |
| { |
| _logger.error("Uncaught exception in thread \"{}\"", t.getName(), e); |
| } |
| finally |
| { |
| // Invoke the thread group's handler too for compatibility with any |
| // existing clients who are already scraping stderr for such conditions. |
| t.getThreadGroup().uncaughtException(t, e); |
| } |
| } |
| } |