Source code

001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *   http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019package org.apache.reef.wake.impl;
020
021import org.apache.reef.wake.EventHandler;
022
023/**
024 * Exception handler for uncaught exceptions.
025 */
026public final class WakeUncaughtExceptionHandler implements Thread.UncaughtExceptionHandler {
027  private EventHandler<Throwable> errorHandler;
028
029  public WakeUncaughtExceptionHandler() {
030  }
031
032  public WakeUncaughtExceptionHandler(final EventHandler<Throwable> errorHandler) {
033    this.errorHandler = errorHandler;
034  }
035
036  public void setErrorHandler(final EventHandler<Throwable> errorHandler) {
037    this.errorHandler = errorHandler;
038  }
039
040  @Override
041  public void uncaughtException(final Thread t, final Throwable e) {
042    final String msg = "Thread " + t.getName() + " threw an uncaught exception.";
043    if (errorHandler != null) {
044      errorHandler.onNext(new Exception(msg, e));
045    }
046  }
047}