/*******************************************************************************
* gMix open source project - https://svs.informatik.uni-hamburg.de/gmix/
* Copyright (C) 2014 SVS
*
* 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, either version 3 of the License, or
* (at your option) any later version.
*
* 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/>.
*******************************************************************************/
package userGeneratedContent.testbedPlugIns.layerPlugIns.layer1network.cascade_TCP_v0_001;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.IOException;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Vector;
import staticContent.framework.controller.SubImplementation;
import staticContent.framework.message.MixMessage;
import staticContent.framework.message.Reply;
import staticContent.framework.message.Request;
import staticContent.framework.routing.RoutingMode;
import staticContent.framework.userDatabase.User;
import staticContent.framework.util.Util;
public class ClientHandler_TCP_RR_sync extends SubImplementation {
//TODO: add timeout for inactive users
private int port;
private InetAddress bindAddress;
private int backlog;
private ServerSocket serverSocket;
private int maxRequestLength;
//private int maxReplyLength; // TODO
private Vector<ChannelData> channels;
private Vector<ChannelData> newConnections;
private int expectedConnections;
private int requestBufferSize;
private int replyBufferSize;
private AcceptorThread acceptorThread;
private RequestThread requestThread;
private ReplyThread replyThread;
//private int queueBlockSize;
@Override
public void constructor() {
if (anonNode.ROUTING_MODE != RoutingMode.GLOBAL_ROUTING)
throw new RuntimeException("this is a cascade plug-in; ROUTING_MODE is not set to GLOBAL_ROUTING -> will exit now");
this.bindAddress = settings.getPropertyAsInetAddress("GLOBAL_MIX_BIND_ADDRESS");
this.port = settings.getPropertyAsInt("GLOBAL_MIX_BIND_PORT");
this.backlog = settings.getPropertyAsInt("BACKLOG");
this.maxRequestLength = settings.getPropertyAsInt("MAX_REQUEST_LENGTH");
//this.maxReplyLength = settings.getPropertyAsInt("MAX_REPLY_LENGTH");
this.requestBufferSize = settings.getPropertyAsInt("REQUEST_BUFFER_SIZE");
this.replyBufferSize = settings.getPropertyAsInt("REPLY_BUFFER_SIZE");
this.expectedConnections = anonNode.EXPECTED_NUMBER_OF_USERS;
//this.queueBlockSize = settings.getPropertyAsInt("QUEUE_BLOCK_SIZE");
this.channels = new Vector<ChannelData>(expectedConnections);
this.newConnections = new Vector<ChannelData>(100);
}
@Override
public void initialize() {
}
@Override
public void begin() {
try {
this.serverSocket = new ServerSocket(port, backlog, bindAddress);
} catch (IOException e) {
e.printStackTrace();
throw new RuntimeException("could not open ServerSocket");
}
System.out.println(anonNode +" listening on " +bindAddress +":" +port);
this.acceptorThread = new AcceptorThread();
this.requestThread = new RequestThread();
if (anonNode.IS_DUPLEX)
this.replyThread = new ReplyThread();
this.acceptorThread.start();
this.requestThread.start();
if (anonNode.IS_DUPLEX)
this.replyThread.start();
}
private class AcceptorThread extends Thread {
@Override
public void run() {
/*new Thread(// TODO: remove
new Runnable() {
public void run() {
while (true) {
System.out.println("free in ioh-queue: " +anonNode.getRequestInputQueue().size());
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
).start(); */
int counter = 0;
while (true) {
try {
Socket client = serverSocket.accept();
if (++counter%100 == 0)
System.out.println(counter +" connections");
ChannelData channelData = new ChannelData();
channelData.user = userDatabase.generateUser();
channelData.user.channeldata = channelData;
userDatabase.addUser(channelData.user);
channelData.socket = client;
channelData.inputStream = new BufferedInputStream(client.getInputStream(), requestBufferSize);
if (anonNode.IS_DUPLEX)
channelData.outputStream = new BufferedOutputStream(client.getOutputStream(), replyBufferSize);
synchronized (acceptorThread) {
newConnections.add(channelData);
}
} catch (IOException e) {
e.printStackTrace();
continue;
}
}
}
}
private synchronized void dropChannel(ChannelData ch) {
channels.remove(ch);
try {
ch.inputStream.close();
ch.outputStream.close();
ch.socket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
private class RequestThread extends Thread {
@Override
public void run() {
int maxReadsPerChannelInARow = settings.getPropertyAsInt("MAX_READS_IN_A_ROW");
int maxMessageBlockSize = anonNode.QUEUE_BLOCK_SIZE;
while (true) {
synchronized (acceptorThread) { // handle new connections
if (newConnections.size() != 0) {
channels.addAll(newConnections);
newConnections = new Vector<ChannelData>(50); // TODO 50?
}
}
Vector<Vector<Request>> newRequests = null;
Vector<Request> newRequestsForCurrentChannel = null;
for (ChannelData ch:channels) {// try to read data from existing channels
try {
for (int i=0; i<maxReadsPerChannelInARow; i++) {
if (ch.requestLength == ChannelData.NOT_SET) {
if (ch.inputStream.available() >= 4) {
byte[] len = new byte[4];
int read = ch.inputStream.read(len);
assert read == 4; // should not be different due to buffered stream; check anyways...
ch.requestLength = Util.byteArrayToInt(len);
if (ch.requestLength > maxRequestLength) {
System.err.println("warning: user " +ch.user +" sent a too large message: " +ch.requestLength +">" +maxRequestLength);
}
} else {
break;
}
}
if (ch.requestLength != ChannelData.NOT_SET) { // length header already read
if (ch.inputStream.available() >= ch.requestLength) {
byte[] msg = new byte[ch.requestLength];
int read = ch.inputStream.read(msg);
assert read == ch.requestLength; // should not be different due to buffered stream; check anyways...
ch.requestLength = ChannelData.NOT_SET;
Request r = MixMessage.getInstanceRequest(msg, ch.user);
if (newRequestsForCurrentChannel == null)
newRequestsForCurrentChannel = new Vector<Request>(maxReadsPerChannelInARow);
newRequestsForCurrentChannel.add(r);
} else {
break;
}
}
}
if (newRequestsForCurrentChannel != null) {
if (newRequests == null)
newRequests = new Vector<Vector<Request>>(maxMessageBlockSize);
newRequests.add(newRequestsForCurrentChannel);
newRequestsForCurrentChannel = null;
}
} catch (IOException e) {
e.printStackTrace();
dropChannel(ch);
continue;
}
if (newRequests != null && newRequests.size() >= maxMessageBlockSize) {
for (Vector<Request> requests:newRequests)
anonNode.putInRequestInputQueue(requests.toArray(new Request[0])); // might block
newRequests = new Vector<Vector<Request>>(maxMessageBlockSize);
}
}
if (newRequests == null) {
try {Thread.sleep(1);} catch (InterruptedException e) {continue;} // TODO: 1 ms adequate?
continue;
}
// TODO: randomize list, if maxReadsPerChannelInARow == 1?
for (Vector<Request> requests:newRequests)
anonNode.putInRequestInputQueue(requests.toArray(new Request[0])); // might block
}
}
}
private class ReplyThread extends Thread {
@Override
public void run() {
while (true) {
Reply[] replies = anonNode.getFromReplyOutputQueue();
for (Reply reply: replies) {
try {
//if (reply.getOwner().channeldata == null)
// reply.getOwner().channeldata =
assert reply != null;
assert reply.getOwner() != null;
assert reply.getOwner().channeldata != null;
assert reply.getOwner().channeldata.outputStream != null;
//System.out.println("sende auf layer 0 fuer " +reply.getOwner().toString() +": " +Util.md5(reply.getByteMessage()));
reply.getOwner().channeldata.outputStream.write(Util.intToByteArray(reply.getByteMessage().length));
reply.getOwner().channeldata.outputStream.write(reply.getByteMessage());
reply.getOwner().channeldata.outputStream.flush();
} catch (IOException e) {
System.err.println("warning: connection to " +reply.getOwner() +" lost");
e.printStackTrace();
System.exit(0);
// TODO: disconnect etc
}
}
}
}
}
public class ChannelData {
final static int NOT_SET = -2;
BufferedInputStream inputStream;
BufferedOutputStream outputStream;
Socket socket;
User user;
int requestLength = NOT_SET;
int replyLength = NOT_SET;
}
}