/*************************************************************************
* Copyright 2009-2012 Eucalyptus Systems, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see http://www.gnu.org/licenses/.
*
* Please contact Eucalyptus Systems, Inc., 6755 Hollister Ave., Goleta
* CA 93117, USA or visit http://www.eucalyptus.com/licenses/ if you need
* additional information or have any questions.
*
* This file may incorporate work covered under the following copyright
* and permission notice:
*
* Software License Agreement (BSD License)
*
* Copyright (c) 2008, Regents of the University of California
* All rights reserved.
*
* Redistribution and use of this software in source and binary forms,
* with or without modification, are permitted provided that the
* following conditions are met:
*
* Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE. USERS OF THIS SOFTWARE ACKNOWLEDGE
* THE POSSIBLE PRESENCE OF OTHER OPEN SOURCE LICENSED MATERIAL,
* COPYRIGHTED MATERIAL OR PATENTED MATERIAL IN THIS SOFTWARE,
* AND IF ANY SUCH MATERIAL IS DISCOVERED THE PARTY DISCOVERING
* IT MAY INFORM DR. RICH WOLSKI AT THE UNIVERSITY OF CALIFORNIA,
* SANTA BARBARA WHO WILL THEN ASCERTAIN THE MOST APPROPRIATE REMEDY,
* WHICH IN THE REGENTS' DISCRETION MAY INCLUDE, WITHOUT LIMITATION,
* REPLACEMENT OF THE CODE SO IDENTIFIED, LICENSING OF THE CODE SO
* IDENTIFIED, OR WITHDRAWAL OF THE CODE CAPABILITY TO THE EXTENT
* NEEDED TO COMPLY WITH ANY SUCH LICENSES OR RIGHTS.
************************************************************************/
package com.eucalyptus.util;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintStream;
import java.util.List;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
import org.apache.log4j.Logger;
import com.eucalyptus.empyrean.Empyrean;
import com.eucalyptus.system.Threads;
import com.google.common.collect.Lists;
public class ServiceProcess implements Runnable {
private static Logger LOG = Logger.getLogger( ServiceProcess.class );
private Threads.ThreadPool threads;
private Process self;
private File pwd;
private Integer returnCode;
private String[] args;
private String[] envp;
private String name;
private PrintStream out, err;
private List listeners = Lists.newArrayList( );
public static ServiceProcess exec( String name, File pwd, String[] args, String[] envp ) {
return new ServiceProcess( name, pwd, args, envp ).exec();
}
private ServiceProcess( String name, File pwd, String[] args, String[] envp ) {
super( );
this.threads = Threads.lookup( Empyrean.class, ServiceProcess.class, name );
this.pwd = pwd;
this.returnCode = null;
this.args = args;
this.envp = envp;
this.name = name;
this.out = System.out;
this.err = System.err;
}
public void kill( ) {
if( this.self != null ) {
this.self.destroy( );
}
}
public ServiceProcess exec() {
this.threads.submit( this );
return this;
}
public void run( ) {
if ( this.self != null ) {
throw new RuntimeException( "Process already running." );
}
this.returnCode = null;
try {
this.self = Runtime.getRuntime( ).exec( this.args, this.envp, this.pwd );
this.threads.submit( new IOMonitor( this.self.getInputStream( ) ) );
this.threads.submit( new IOMonitor( this.self.getErrorStream( ) ) );
try {
this.returnCode = this.self.waitFor( );
} catch ( InterruptedException e ) {
Thread.currentThread( ).interrupt( );
LOG.debug( e, e );
}
} catch ( Exception e ) {
LOG.error( e, e );
this.threads.getExecutorService( ).submit( this );
}
}
private static class IOMonitor implements Runnable {
private AtomicBoolean finished = new AtomicBoolean( false );
private BufferedReader in;
public IOMonitor( InputStream in ) {
this.in = new BufferedReader( new InputStreamReader( in ) );
}
public boolean isFinished() {
return this.finished.get( );
}
@Override
public void run( ) {
byte[] buf = new byte[1024];
while ( !this.finished.get( ) ) {
try {
if( !in.ready( ) ) {
TimeUnit.MILLISECONDS.sleep( 100 );
}
String line = "";
if( ( line = in.readLine( ) ) == null ) {
LOG.info( "I/O Stream closed for: " + in.toString( ) );
this.finished.set( true );
return;
}
LOG.debug( line );
} catch ( InterruptedException e ) {
Thread.currentThread( ).interrupt( );
LOG.debug( e, e );
this.finished.set( true );
} catch ( Exception e ) {
LOG.debug( e, e );
this.finished.set( true );
}
}
}
}
}