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package com.orbekk.protobuf;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.IOException;
import java.net.Socket;
import java.util.LinkedList;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.ExecutorService;
public class ConnectionHandler {
private final Socket connection;
private final BlockingQueue<Data.Response> dispatcherOutput;
private final RequestDispatcher dispatcher;
private class IncomingHandler implements Runnable {
@Override public void run() {
dispatcher.start();
try {
BufferedInputStream input = new BufferedInputStream(
connection.getInputStream());
while (!connection.isClosed()) {
Data.Request r = Data.Request.parseDelimitedFrom(
input);
if (r == null) {
tryCloseConnection();
} else {
try {
dispatcher.handleRequest(r);
} catch (InterruptedException e) {
tryCloseConnection();
return;
}
}
}
} catch (IOException e) {
tryCloseConnection();
}
dispatcher.interrupt();
}
}
private class OutgoingHandler implements Runnable {
@Override public void run() {
try {
BufferedOutputStream output = new BufferedOutputStream(
connection.getOutputStream());
LinkedList<Data.Response> buffer =
new LinkedList<Data.Response>();
while (!connection.isClosed()) {
buffer.clear();
buffer.add(dispatcherOutput.take());
dispatcherOutput.drainTo(buffer);
for (Data.Response response : buffer) {
response.writeDelimitedTo(output);
}
output.flush();
}
} catch (InterruptedException e) {
tryCloseConnection();
} catch (IOException e) {
tryCloseConnection();
}
dispatcher.interrupt();
}
}
public static ConnectionHandler create(Socket connection,
ExecutorService requestPool, ServiceHolder services) {
BlockingQueue<Data.Response> dispatcherOutput =
new ArrayBlockingQueue(RequestDispatcher.DEFAULT_QUEUE_SIZE);
RequestDispatcher dispatcher = new RequestDispatcher(
requestPool, dispatcherOutput, services);
return new ConnectionHandler(connection, dispatcherOutput,
dispatcher);
}
ConnectionHandler(Socket connection,
BlockingQueue<Data.Response> dispatcherOutput,
RequestDispatcher dispatcher) {
this.connection = connection;
this.dispatcherOutput = dispatcherOutput;
this.dispatcher = dispatcher;
}
public void closeConnection() {
tryCloseConnection();
}
private void tryCloseConnection() {
try {
connection.close();
} catch (IOException e) {
// Assume connection is closed.
}
}
public Runnable createIncomingHandler() {
return new IncomingHandler();
}
public Runnable createOutgoingHandler() {
return new OutgoingHandler();
}
}
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