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help class that simplifies implementing serial forwarders

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This commit is contained in:
Fredrik Osterlind 2011-11-01 09:55:08 +01:00
parent 370ad52620
commit 77057ede8a
1 changed files with 190 additions and 0 deletions
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tools/cooja/java/se/sics/cooja/util/MoteSerialSocketConnection.java Normal file
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/*
* Copyright (c) 2011, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE 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 INSTITUTE 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.
*/
package se.sics.cooja.util;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.Socket;
import java.util.ArrayList;
import java.util.Observable;
import java.util.Observer;
import org.apache.log4j.Logger;
import se.sics.cooja.Mote;
import se.sics.cooja.interfaces.SerialPort;
/**
* Help class for forwarding serial data between a mote and a socket.
*
* @author Fredrik Osterlind
*/
public class MoteSerialSocketConnection {
private static final long serialVersionUID = 1L;
private static Logger logger = Logger.getLogger(MoteSerialSocketConnection.class);
private boolean isConnected = false;
public int toMote = 0, toSocket = 0;
private SerialPort motePort;
private Observer moteObserver;
private Socket socket;
private DataInputStream socketIn;
private DataOutputStream socketOut;
private ArrayList<MoteSerialSocketConnectionListener> listeners = null;
public MoteSerialSocketConnection(Mote mote, String server, int serverPort)
throws IOException {
isConnected = true;
/* Simulated -> socket */
motePort = (SerialPort) mote.getInterfaces().getLog();
motePort.addSerialDataObserver(moteObserver = new Observer() {
public void update(Observable obs, Object obj) {
try {
if (socketOut == null) {
return;
}
socketOut.write(motePort.getLastSerialData());
socketOut.flush();
toSocket++;
if (listeners != null) {
for (MoteSerialSocketConnectionListener dl: listeners) {
dl.dataTransferred(MoteSerialSocketConnection.this, toMote, toSocket, motePort.getLastSerialData());
}
}
} catch (IOException e) {
e.printStackTrace();
logger.fatal("Write to socket error: " + e.getMessage(), e);
cleanup();
}
}
});
/* Socket -> simulated */
socket = new Socket(server, serverPort);
socketIn = new DataInputStream(socket.getInputStream());
socketOut = new DataOutputStream(socket.getOutputStream());
socketOut.flush();
Thread socketThread = new Thread(new Runnable() {
public void run() {
int numRead = 0;
byte[] data = new byte[1024];
while (true) {
numRead = -1;
try {
numRead = socketIn.read(data);
} catch (IOException e) {
e.printStackTrace();
return;
}
if (numRead >= 0) {
for (int i = 0; i < numRead; i++) {
toMote ++;
motePort.writeByte(data[i]);
if (listeners != null) {
for (MoteSerialSocketConnectionListener dl: listeners) {
dl.dataTransferred(MoteSerialSocketConnection.this, toMote, toSocket, data[i]);
}
}
}
} else {
logger.fatal("Incoming data thread shut down");
cleanup();
break;
}
}
}
});
socketThread.start();
}
public boolean isConnected() {
return isConnected;
}
public void cleanup() {
if (!isConnected) {
return;
}
isConnected = false;
motePort.deleteSerialDataObserver(moteObserver);
try {
if (socket != null) {
socket.close();
socket = null;
}
} catch (IOException e1) {
}
try {
if (socketIn != null) {
socketIn.close();
socketIn = null;
}
} catch (IOException e) {
}
try {
if (socketOut != null) {
socketOut.close();
socketOut = null;
}
} catch (IOException e) {
}
if (listeners != null) {
for (MoteSerialSocketConnectionListener dl: listeners) {
dl.wasDisconnected(MoteSerialSocketConnection.this);
}
listeners = null;
}
}
public void addListener(MoteSerialSocketConnectionListener l) {
if (listeners == null) {
listeners = new ArrayList<MoteSerialSocketConnectionListener>();
}
listeners.add(l);
}
public interface MoteSerialSocketConnectionListener {
public void wasDisconnected(MoteSerialSocketConnection s);
public void dataTransferred(MoteSerialSocketConnection s, int toMote, int toSocket, byte data);
}
}