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/*****************************************************************************
* Java Plug-in Framework (JPF)
* Copyright (C) 2004-2007 Dmitry Olshansky
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*****************************************************************************/
package org.java.plugin.boot;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* @version $Id$
*/
final class ControlThread extends Thread {
static boolean isApplicationRunning(final InetAddress host,
final int port) {
try {
Socket socket = new Socket(host, port);
try {
socket.setKeepAlive(true);
String test = "" + System.currentTimeMillis(); //$NON-NLS-1$
OutputStream out = socket.getOutputStream();
InputStream in = null;
try {
System.out.println("found running control service on " //$NON-NLS-1$
+ host + ":" + port); //$NON-NLS-1$
out.write(("PING " + test).getBytes()); //$NON-NLS-1$
out.flush();
socket.shutdownOutput();
in = socket.getInputStream();
StringBuilder commandResult = new StringBuilder();
byte[] buf = new byte[16];
int len;
while ((len = in.read(buf)) != -1) {
commandResult.append(new String(buf, 0, len));
}
socket.shutdownInput();
if (commandResult.toString().startsWith("OK") //$NON-NLS-1$
&& (commandResult.toString().indexOf(test) != -1)) {
System.out.println("PING command succeed"); //$NON-NLS-1$
return true;
}
System.out.println("PING command failed"); //$NON-NLS-1$
} finally {
try {
out.close();
} catch (IOException ioe) {
// ignore
}
if (in != null) {
try {
in.close();
} catch (IOException ioe) {
// ignore
}
}
}
} finally {
socket.close();
}
} catch (IOException ioe) {
System.out.println(
"seems that there is no control service running on " //$NON-NLS-1$
+ host + ":" + port); //$NON-NLS-1$
//ioe.printStackTrace();
}
return false;
}
static boolean stopRunningApplication(final InetAddress host,
final int port) {
boolean result = false;
try {
Socket socket = new Socket(host, port);
try {
socket.setKeepAlive(true);
OutputStream out = socket.getOutputStream();
InputStream in = null;
try {
System.out.println("found running control service on " //$NON-NLS-1$
+ host + ":" + port); //$NON-NLS-1$
out.write("STOP".getBytes()); //$NON-NLS-1$
out.flush();
socket.shutdownOutput();
in = socket.getInputStream();
StringBuilder commandResult = new StringBuilder();
byte[] buf = new byte[16];
int len;
while ((len = in.read(buf)) != -1) {
commandResult.append(new String(buf, 0, len));
}
socket.shutdownInput();
if (commandResult.toString().startsWith("OK")) { //$NON-NLS-1$
System.out.println("STOP command succeed"); //$NON-NLS-1$
result = true;
} else {
System.out.println("STOP command failed"); //$NON-NLS-1$
}
} finally {
try {
out.close();
} catch (IOException ioe) {
// ignore
}
if (in != null) {
try {
in.close();
} catch (IOException ioe) {
// ignore
}
}
}
} finally {
socket.close();
}
} catch (IOException ioe) {
System.out.println(
"seems that there is no control service running on " //$NON-NLS-1$
+ host + ":" + port); //$NON-NLS-1$
//ioe.printStackTrace();
}
if (result) {
try {
Thread.sleep(2000);
} catch (InterruptedException ie) {
// ignore
}
}
return result;
}
private Log log;
private ServerSocket serverSocket;
private final ServiceApplication application;
private boolean appRunning;
ControlThread(final InetAddress host, final int port,
final ServiceApplication server) throws Exception {
log = LogFactory.getLog(this.getClass());
application = server;
serverSocket = new ServerSocket(port, 1, host);
appRunning = true;
setName("jpf-application-control-thread"); //$NON-NLS-1$
}
/**
* @see java.lang.Runnable#run()
*/
@Override
public void run() {
try {
while (true) {
try {
Socket clientSocket = serverSocket.accept();
try {
if (handleRequest(clientSocket)) {
break;
}
} finally {
try {
clientSocket.close();
} catch (IOException ioe) {
// ignore
}
}
} catch (Exception e) {
warn("error on server socket", e); //$NON-NLS-1$
break;
}
}
} catch (Exception e) {
error(e);
} finally {
try {
serverSocket.close();
} catch (IOException ioe) {
warn("error closing server socket", ioe); //$NON-NLS-1$
}
if (appRunning) {
stopApplication();
}
}
}
private synchronized boolean handleRequest(final Socket clientSocket) {
debug("handling control request"); //$NON-NLS-1$
if (!isValidRemoteHost(clientSocket.getInetAddress())) {
warn("incoming connection to control socket registered" //$NON-NLS-1$
+ " from REMOTE address " + clientSocket.getInetAddress() //$NON-NLS-1$
+ ", attempt to execute command was IGNORED"); //$NON-NLS-1$
try {
clientSocket.close();
} catch (IOException e) {
// ignore
}
return false;
}
debug("processing control request"); //$NON-NLS-1$
boolean result = false;
try {
String commandResult;
InputStream in = clientSocket.getInputStream();
OutputStream out = null;
try {
StringBuilder command = new StringBuilder();
byte[] buf = new byte[16];
int len;
while ((len = in.read(buf)) != -1) {
command.append(new String(buf, 0, len));
}
clientSocket.shutdownInput();
debug("got command - " + command); //$NON-NLS-1$
if ("STOP".equals(command.toString())) { //$NON-NLS-1$
stopApplication();
result = true;
commandResult = "OK: stop done"; //$NON-NLS-1$
} else if (command.toString().startsWith("PING")) { //$NON-NLS-1$
commandResult = "OK: " //$NON-NLS-1$
+ command.substring("PING".length()); //$NON-NLS-1$
} else {
commandResult = "ERROR: unknown command"; //$NON-NLS-1$
}
//debug("command executed");
//debug("sending command result - " + commandResult);
out = clientSocket.getOutputStream();
out.write(commandResult.getBytes());
out.flush();
clientSocket.shutdownOutput();
//debug("command result sent");
} finally {
try {
in.close();
} catch (IOException ioe) {
// ignore
}
if (out != null) {
try {
out.close();
} catch (IOException ioe) {
// ignore
}
}
}
} catch (IOException ioe) {
error("error processing control request", ioe); //$NON-NLS-1$
}
return result;
}
private void stopApplication() {
if (!appRunning) {
debug("application not running"); //$NON-NLS-1$
return;
}
appRunning = false;
debug("stopping application"); //$NON-NLS-1$
try {
Boot.stopApplication(application);
log = null;
} catch (Exception e) {
error("an error has occurred while stopping" //$NON-NLS-1$
+ " application", e); //$NON-NLS-1$
}
debug("application stopped from control thread"); //$NON-NLS-1$
}
private boolean isValidRemoteHost(final InetAddress addr) {
byte[] localAddr = serverSocket.getInetAddress().getAddress();
byte[] remoteAddr = addr.getAddress();
if (localAddr.length != remoteAddr.length) {
return false;
}
for (int i = 0; i < remoteAddr.length; i++) {
if (localAddr[i] != remoteAddr[i]) {
return false;
}
}
return true;
}
private void debug(final String msg) {
if (log != null) {
log.debug(msg);
} else {
System.out.println(msg);
}
}
private void warn(final String msg) {
if (log != null) {
log.warn(msg);
} else {
System.out.println(msg);
}
}
private void warn(final String msg, final Exception e) {
if (log != null) {
log.warn(msg, e);
} else {
System.out.println(msg);
e.printStackTrace();
}
}
private void error(final String msg, final Exception e) {
if (log != null) {
log.error(msg, e);
} else {
System.err.println(msg);
e.printStackTrace();
}
}
private void error(final Exception e) {
if (log != null) {
log.error(e);
} else {
e.printStackTrace();
}
}
}
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