001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.commons.exec; 018 019import java.io.File; 020import java.util.concurrent.ThreadFactory; 021 022/** 023 * Runs daemon processes asynchronously. Callers are expected to register a {@link ProcessDestroyer} before executing any processes. 024 * 025 * @since 1.3 026 */ 027public class DaemonExecutor extends DefaultExecutor { 028 029 /** 030 * Constructs a new builder. 031 * 032 * @since 1.4.0 033 */ 034 public static class Builder extends DefaultExecutor.Builder<Builder> { 035 036 /** 037 * Creates a new configured DaemonExecutor. 038 * 039 * @return a new configured DaemonExecutor. 040 */ 041 @Override 042 public DefaultExecutor get() { 043 return new DaemonExecutor(getThreadFactory(), getExecuteStreamHandler(), getWorkingDirectory()); 044 } 045 046 } 047 048 /** 049 * Creates a new builder. 050 * 051 * @return a new builder. 052 * @since 1.4.0 053 */ 054 public static Builder builder() { 055 return new Builder(); 056 } 057 058 /** 059 * Constructs a new instance. 060 * 061 * @deprecated Use {@link Builder#get()}. 062 */ 063 @Deprecated 064 public DaemonExecutor() { 065 // super 066 } 067 068 private DaemonExecutor(final ThreadFactory threadFactory, final ExecuteStreamHandler executeStreamHandler, final File workingDirectory) { 069 super(threadFactory, executeStreamHandler, workingDirectory); 070 } 071 072 /** 073 * Factory method to create a thread waiting for the result of an asynchronous execution. 074 * 075 * @param runnable the runnable passed to the thread. 076 * @param name the name of the thread. 077 * @return the thread. 078 */ 079 @Override 080 protected Thread createThread(final Runnable runnable, final String name) { 081 final Thread thread = super.createThread(runnable, name); 082 thread.setDaemon(true); 083 return thread; 084 } 085}