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A Java library for the Low Entry UE4 plugins.
package lowentry.ue4.classes.sockets;
import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.util.concurrent.atomic.AtomicBoolean;
import lowentry.ue4.classes.ThreadSleeper;
import lowentry.ue4.classes.sockets.SocketConnection.FunctionCallListener;
import lowentry.ue4.classes.sockets.SocketConnection.LatentFunctionCallListener;
import lowentry.ue4.classes.sockets.SocketTasks.ConnectedThreadedSocketConnection;
import lowentry.ue4.classes.sockets.SocketTasks.DisconnectedThreadedSocketConnection;
import lowentry.ue4.classes.sockets.SocketTasks.FailedFunctionCallListener;
import lowentry.ue4.classes.sockets.SocketTasks.FailedLatentFunctionCallListener;
import lowentry.ue4.classes.sockets.SocketTasks.ReceivedMessageThreadedSocketConnection;
import lowentry.ue4.classes.sockets.SocketTasks.ReceivedUnreliableMessageThreadedSocketConnection;
import lowentry.ue4.libs.pyronet.craterstudio.util.concur.SimpleBlockingQueue;
import lowentry.ue4.libs.pyronet.jawnae.pyronet.PyroException;
public class ThreadedSocketConnection
{
private static int ID = 1;
private static final Object idSynchronizer = new Object();
protected final Object startSynchronizer = new Object();
protected final ThreadSleeper reconnectSleeper = new ThreadSleeper();
protected final ThreadSleeper startSleeper = new ThreadSleeper();
protected final ThreadSleeper stopSleeper = new ThreadSleeper();
protected final Thread networkThread;
protected final String host;
protected final int portTcp;
protected final int portUdp;
protected final ThreadedSocketConnectionListener listener;
protected volatile SocketConnection connection;
protected volatile Object attachment;
protected volatile boolean connected = false;
protected volatile boolean run = true;
protected final SimpleBlockingQueue tasks = new SimpleBlockingQueue();
protected volatile boolean started = false;
private static final class PrivateSocketConnectionListener implements SocketConnectionListener
{
public final ThreadedSocketConnection self;
public AtomicBoolean connectedWasCalled = new AtomicBoolean(false);
public PrivateSocketConnectionListener(ThreadedSocketConnection self)
{
this.self = self;
}
@Override
public void connected(SocketConnection connection)
{
if(!self.run)
{
return;
}
connectedWasCalled.set(true);
self.tasks.put(new ConnectedThreadedSocketConnection(self, self.listener, connection));
}
@Override
public void disconnected(SocketConnection connection)
{
if(!self.run)
{
return;
}
if(!connectedWasCalled.getAndSet(false))
{
return;
}
self.tasks.put(new DisconnectedThreadedSocketConnection(self, self.listener, connection));
}
@Override
public void receivedUnreliableMessage(SocketConnection connection, byte[] bytes)
{
if(!self.run)
{
return;
}
self.tasks.put(new ReceivedUnreliableMessageThreadedSocketConnection(self, self.listener, connection, bytes));
}
@Override
public void receivedMessage(SocketConnection connection, byte[] bytes)
{
if(!self.run)
{
return;
}
self.tasks.put(new ReceivedMessageThreadedSocketConnection(self, self.listener, connection, bytes));
}
};
public ThreadedSocketConnection(String host, int portTcp, ThreadedSocketConnectionListener listener)
{
this.networkThread = Thread.currentThread();
this.host = host;
this.portTcp = portTcp;
this.portUdp = 0;
this.listener = listener;
}
public ThreadedSocketConnection(String host, int portTcp, int portUdp, ThreadedSocketConnectionListener listener)
{
this.networkThread = Thread.currentThread();
this.host = host;
this.portTcp = portTcp;
this.portUdp = portUdp;
this.listener = listener;
}
public ThreadedSocketConnection(String host, int portTcp, SocketConnectionListener listener)
{
this.networkThread = Thread.currentThread();
this.host = host;
this.portTcp = portTcp;
this.portUdp = 0;
this.listener = getWrappedListener(listener);
}
public ThreadedSocketConnection(String host, int portTcp, int portUdp, SocketConnectionListener listener)
{
this.networkThread = Thread.currentThread();
this.host = host;
this.portTcp = portTcp;
this.portUdp = portUdp;
this.listener = getWrappedListener(listener);
}
public static ThreadedSocketConnectionListener getWrappedListener(final SocketConnectionListener listener)
{
return new ThreadedSocketConnectionListener()
{
@Override
public void connected(ThreadedSocketConnection threadedConnection, SocketConnection connection)
{
listener.connected(connection);
}
@Override
public void disconnected(ThreadedSocketConnection threadedConnection, SocketConnection connection)
{
listener.disconnected(connection);
}
@Override
public void receivedUnreliableMessage(ThreadedSocketConnection threadedConnection, SocketConnection connection, byte[] bytes)
{
listener.receivedUnreliableMessage(connection, bytes);
}
@Override
public void receivedMessage(ThreadedSocketConnection threadedConnection, SocketConnection connection, byte[] bytes)
{
listener.receivedMessage(connection, bytes);
}
};
}
/**
* Starts connecting to the server.
*
* This method will not wait till a connection attempt has been made, it will return pretty much immediately.
*
* When there is no connection, this class will keep attempting to connect once every 1000 milliseconds.
*/
public void startAsync()
{
startAsync(Thread.NORM_PRIORITY);
}
/**
* Starts connecting to the server.
*
* This method will not wait till a connection attempt has been made, it will return pretty much immediately.
*
* When there is no connection, this class will keep attempting to connect once every 1000 milliseconds.
*/
public void startAsync(int threadPriority)
{
start(false, threadPriority);
}
/**
* Starts connecting to the server.
*
* This method will wait till a connection attempt has been made.
* After this method, {@link #isConnected()} will return true or false depending on whether the first connection attempt was successful.
*
* When there is no connection, this class will keep attempting to connect once every 1000 milliseconds.
*/
public void start()
{
start(Thread.NORM_PRIORITY);
}
/**
* Starts connecting to the server.
*
* This method will wait till a connection attempt has been made.
* After this method, {@link #isConnected()} will return true or false depending on whether the first connection attempt was successful.
*
* When there is no connection, this class will keep attempting to connect once every 1000 milliseconds.
*/
public void start(int threadPriority)
{
start(true, threadPriority);
}
/**
* Starts connecting to the server.
*
* This method will wait till a connection attempt has been made if the given waitForStart is true.
* After this method, {@link #isConnected()} will return true or false depending on whether the first connection attempt was successful.
*
* When there is no connection, this class will keep attempting to connect once every 1000 milliseconds.
*/
protected void start(final boolean waitForStart, final int threadPriority)
{
synchronized(startSynchronizer)
{
if(connection != null)
{
stop();
}
run = true;
started = false;
Thread thread = new Thread(new Runnable()
{
@Override
public void run()
{
PrivateSocketConnectionListener listenerWrapper = new PrivateSocketConnectionListener(ThreadedSocketConnection.this);
connection = new SocketConnection(host, portTcp, portUdp, listenerWrapper, tasks);
connected = connection.connect();
started = true;
startSleeper.wakeup();
while(run)
{
if(!connected)
{
reconnectSleeper.sleep(1000);
if(!run)
{
break;
}
connected = connection.connect();
}
else
{
if(connection.isConnected())
{
connection.listen();
}
else
{
connected = false;
}
}
}
while(connection.isConnected() && connection.pyro().hasDataEnqueued())
{
connection.listen(10);
}
if(connected)
{
connection.disconnect();
connected = false;
if(listenerWrapper.connectedWasCalled.getAndSet(false))
{
tasks.put(new DisconnectedThreadedSocketConnection(ThreadedSocketConnection.this, listener, connection));
}
}
connection = null;
stopSleeper.wakeup();
}
}, "Threaded-Socket-Connection-" + getNextId());
thread.setDaemon(true);
thread.setPriority(threadPriority);
thread.start();
if(waitForStart)
{
waitTillStarted();
}
}
}
/**
* Waits till a connection attempt has been made.
*/
public void waitTillStarted()
{
while(!started)
{
startSleeper.sleep(50);
}
}
/**
* Returns true if there is a connection, returns false otherwise.
*/
public boolean isConnected()
{
return connected;
}
/**
* Disconnects and stops automatically reconnecting.
*
* Does not wait till the connection has been broken.
*/
public void stopAsync()
{
synchronized(startSynchronizer)
{
run = false;
wakeup();
}
}
/**
* Disconnects and stops automatically reconnecting.
*
* Waits till the connection has been broken.
*/
public void stop()
{
synchronized(startSynchronizer)
{
run = false;
wakeup();
waitTillStopped();
}
}
/**
* Waits till the connection has been broken.
*/
public void waitTillStopped()
{
while(connection != null)
{
stopSleeper.sleep(50);
}
}
/**
* Causes the threaded connection to check the run state again.
*/
protected void wakeup()
{
reconnectSleeper.wakeup();
final SocketConnection finalConnection = connection;
if(finalConnection != null)
{
try
{
finalConnection.selector().wakeup();
}
catch(Throwable e)
{
}
}
}
/**
* Executes any events caused in the threaded {@link SocketConnection#listen()} loop.
*
* WARNING: Only call this on the same thread this object was created in!
*/
public void executePendingTasks()
{
if(networkThread != Thread.currentThread())
{
throw new PyroException("call from outside the network-thread");
}
while(true)
{
Runnable task = tasks.poll();
if(task == null)
{
break;
}
try
{
task.run();
}
catch(Throwable cause)
{
cause.printStackTrace();
}
}
}
/**
* This will add a task that will be executed during the next {@link #executePendingTasks()},
* which will cause the task to be executed in the same thread this object was created in.
*/
public void addTask(Runnable task)
{
if(task != null)
{
tasks.put(task);
}
}
/**
* Attach any object to the connection, for example to store session information.
* Only one object can be attached at a time!
*/
public void setAttachment(Object attachment)
{
this.attachment = attachment;
}
/**
* Returns the previously attached object, or null if none is set.
* Call this function like this:
*
* YourClass object = connection.getAttachment();
*
* This will automatically take the type that the compiler thinks it has to be.
* To control the type manually, call this function like this:
*
* YourClass object = connection.<YourClass>getAttachment();
*/
@SuppressWarnings("unchecked")
public T getAttachment()
{
return (T) attachment;
}
/**
* Returns true if the connection has an attachment.
*/
public boolean hasAttachment()
{
return (attachment != null);
}
/**
* Returns the local socket address (host and port), can return null.
*/
public InetSocketAddress getLocalAddress()
{
final SocketConnection finalConnection = connection;
if(finalConnection == null)
{
return null;
}
return finalConnection.getLocalAddress();
}
/**
* Returns the remote socket address (host and port), can return null.
*/
public InetSocketAddress getRemoteAddress()
{
final SocketConnection finalConnection = connection;
if(finalConnection == null)
{
return null;
}
return finalConnection.getRemoteAddress();
}
/**
* Will send the bytes immediately.
*/
public void sendUnreliableMessage(final byte[]... bytes)
{
final SocketConnection finalConnection = connection;
if(!connected || (finalConnection == null))
{
return;
}
finalConnection.sendUnreliableMessage(bytes);
}
/**
* Will send the bytes immediately.
*/
public void sendUnreliableMessage(final byte[] bytes)
{
final SocketConnection finalConnection = connection;
if(!connected || (finalConnection == null))
{
return;
}
finalConnection.sendUnreliableMessage(bytes);
}
/**
* Will send the bytes immediately, the ByteBuffer can be cleared and reused after calling this function.
*/
public void sendUnreliableMessage(final ByteBuffer bytes)
{
final SocketConnection finalConnection = connection;
if(!connected || (finalConnection == null))
{
return;
}
finalConnection.sendUnreliableMessage(bytes);
}
/**
* Will enqueue the bytes to send them.
*/
public void sendMessage(final byte[]... bytes)
{
final SocketConnection finalConnection = connection;
if(!connected || (finalConnection == null))
{
return;
}
finalConnection.sendMessage(bytes);
}
/**
* Will enqueue the bytes to send them.
*/
public void sendMessage(final byte[] bytes)
{
final SocketConnection finalConnection = connection;
if(!connected || (finalConnection == null))
{
return;
}
finalConnection.sendMessage(bytes);
}
/**
* Will enqueue the bytes to send them.
*/
public void sendFunctionCall(final byte[] bytes, final FunctionCallListener functionCallListener)
{
final SocketConnection finalConnection = connection;
if(!connected || (finalConnection == null))
{
if(functionCallListener != null)
{
tasks.put(new FailedFunctionCallListener(functionCallListener, finalConnection));
}
return;
}
finalConnection.sendFunctionCall(bytes, functionCallListener);
}
/**
* Will enqueue the bytes to send them.
*
* Timeout is the timeout in seconds.
*/
public void sendFunctionCall(final float timeout, final byte[] bytes, final FunctionCallListener functionCallListener)
{
final SocketConnection finalConnection = connection;
if(!connected || (finalConnection == null))
{
if(functionCallListener != null)
{
tasks.put(new FailedFunctionCallListener(functionCallListener, finalConnection));
}
return;
}
finalConnection.sendFunctionCall(timeout, bytes, functionCallListener);
}
/**
* Will enqueue the bytes to send them.
*/
public LatentFunctionCall sendLatentFunctionCall(final byte[] bytes, final LatentFunctionCallListener functionCallListener)
{
final SocketConnection finalConnection = connection;
if(!connected || (finalConnection == null))
{
if(functionCallListener != null)
{
tasks.put(new FailedLatentFunctionCallListener(functionCallListener, finalConnection));
}
return new LatentFunctionCall(finalConnection, true);
}
return finalConnection.sendLatentFunctionCall(bytes, functionCallListener);
}
/**
* Will enqueue the bytes to send them.
*
* Timeout is the timeout in seconds.
*/
public LatentFunctionCall sendLatentFunctionCall(final float timeout, final byte[] bytes, final LatentFunctionCallListener functionCallListener)
{
final SocketConnection finalConnection = connection;
if(!connected || (finalConnection == null))
{
if(functionCallListener != null)
{
tasks.put(new FailedLatentFunctionCallListener(functionCallListener, finalConnection));
}
return new LatentFunctionCall(finalConnection, true);
}
return finalConnection.sendLatentFunctionCall(timeout, bytes, functionCallListener);
}
/**
* Returns the current connection, can be null.
*/
public SocketConnection connection()
{
return connection;
}
@Override
public String toString()
{
final SocketConnection finalConnection = connection;
if(finalConnection != null)
{
return finalConnection.toString();
}
return super.toString();
}
private static int getNextId()
{
synchronized(idSynchronizer)
{
int id = ID;
ID++;
if(ID >= Integer.MAX_VALUE)
{
ID = 1;
}
return id;
}
}
}
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