001/* 002 * HA-JDBC: High-Availability JDBC 003 * Copyright (c) 2004-2007 Paul Ferraro 004 * 005 * This library is free software; you can redistribute it and/or modify it 006 * under the terms of the GNU Lesser General Public License as published by the 007 * Free Software Foundation; either version 2.1 of the License, or (at your 008 * option) any later version. 009 * 010 * This library is distributed in the hope that it will be useful, but WITHOUT 011 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 012 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License 013 * for more details. 014 * 015 * You should have received a copy of the GNU Lesser General Public License 016 * along with this library; if not, write to the Free Software Foundation, 017 * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 018 * 019 * Contact: ferraro@users.sourceforge.net 020 */ 021package net.sf.hajdbc.util.concurrent; 022 023import java.util.Collections; 024import java.util.List; 025import java.util.concurrent.AbstractExecutorService; 026import java.util.concurrent.TimeUnit; 027 028/** 029 * Executor service that executes tasks in the caller thread. 030 * 031 * @author Paul Ferraro 032 */ 033public class SynchronousExecutor extends AbstractExecutorService 034{ 035 private boolean shutdown; 036 037 /** 038 * @see java.util.concurrent.ExecutorService#awaitTermination(long, java.util.concurrent.TimeUnit) 039 */ 040 @Override 041 public boolean awaitTermination(long time, TimeUnit unit) 042 { 043 return true; 044 } 045 046 /** 047 * @see java.util.concurrent.ExecutorService#isShutdown() 048 */ 049 @Override 050 public boolean isShutdown() 051 { 052 return this.shutdown; 053 } 054 055 /** 056 * @see java.util.concurrent.ExecutorService#isTerminated() 057 */ 058 @Override 059 public boolean isTerminated() 060 { 061 return this.shutdown; 062 } 063 064 /** 065 * @see java.util.concurrent.ExecutorService#shutdown() 066 */ 067 @Override 068 public void shutdown() 069 { 070 this.shutdown = true; 071 } 072 073 /** 074 * @see java.util.concurrent.ExecutorService#shutdownNow() 075 */ 076 @Override 077 public List<Runnable> shutdownNow() 078 { 079 this.shutdown(); 080 081 return Collections.emptyList(); 082 } 083 084 /** 085 * @see java.util.concurrent.Executor#execute(java.lang.Runnable) 086 */ 087 @Override 088 public void execute(Runnable task) 089 { 090 task.run(); 091 } 092}