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.io.watcher.util; 020 021import org.apache.reef.annotations.Unstable; 022import org.apache.reef.wake.EventHandler; 023 024import java.util.logging.Level; 025import java.util.logging.Logger; 026 027/** 028 * Handler that executes Runnable commands. 029 */ 030@Unstable 031public final class RunnableExecutingHandler implements EventHandler<Runnable> { 032 033 private static final Logger LOG = Logger.getLogger(RunnableExecutingHandler.class.getName()); 034 035 @Override 036 public void onNext(final Runnable runnable) { 037 try { 038 runnable.run(); 039 } catch(final Exception exception) { 040 LOG.log(Level.INFO, "An exception occurred while writing event with Watcher. {0}", exception.getMessage()); 041 } 042 } 043}