org.apache.xbean.terminal.telnet.TelnetDaemon Maven / Gradle / Ivy
/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.xbean.terminal.telnet;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
public class TelnetDaemon implements Runnable {
private final TelnetShell shell;
private final int port;
private ServerSocket serverSocket;
/**
* We start out in a "stopped" state until someone calls the start method.
*/
private boolean stop = true;
public TelnetDaemon(String serverName, int port) {
this.port = port;
this.shell = new TelnetShell(serverName);
}
public void start() throws Exception {
synchronized (this) {
// Don't bother if we are already started/starting
if (!stop)
return;
stop = false;
// Do our stuff
try {
serverSocket = new ServerSocket(port, 20);
Thread d = new Thread(this);
d.setName("service.shell@" + d.hashCode());
d.setDaemon(true);
d.start();
} catch (Exception e) {
throw new Exception("Service failed to start.", e);
}
}
}
public void stop() throws Exception {
synchronized (this) {
if (stop) {
return;
}
stop = true;
try {
this.notifyAll();
} catch (Throwable t) {
t.printStackTrace();
}
}
}
public synchronized void service(final Socket socket) throws IOException {
Thread d = new Thread(new Runnable() {
public void run() {
try {
shell.service(socket);
} catch (SecurityException e) {
} catch (Throwable e) {
} finally {
try {
if (socket != null)
socket.close();
} catch (Throwable t) {
}
}
}
});
d.setDaemon(true);
d.start();
}
public void run() {
Socket socket = null;
while (!stop) {
try {
socket = serverSocket.accept();
socket.setTcpNoDelay(true);
if (!stop) service(socket);
} catch (SecurityException e) {
} catch (Throwable e) {
}
}
}
}