/*
* Copyright (C) The Apache Software Foundation. All rights reserved.
*
* This software is published under the terms of the Apache Software
* License version 1.1, a copy of which has been included with this
* distribution in the LICENSE.txt file. */
package org.apache.log4j.chainsaw;
import java.io.EOFException;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.SocketException;
import org.apache.log4j.Logger;
import org.apache.log4j.spi.LoggingEvent;
/**
* A daemon thread the processes connections from a
* <code>org.apache.log4j.net.SocketAppender.html</code>.
*
* @author <a href="mailto:[email protected]">Oliver Burn</a>
*/
class LoggingReceiver extends Thread {
/** used to log messages **/
private static final Logger LOG = Logger.getLogger(LoggingReceiver.class);
/**
* Helper that actually processes a client connection. It receives events
* and adds them to the supplied model.
*
* @author <a href="mailto:[email protected]">Oliver Burn</a>
*/
private class Slurper implements Runnable {
/** socket connection to read events from **/
private final Socket mClient;
/**
* Creates a new <code>Slurper</code> instance.
*
* @param aClient socket to receive events from
*/
Slurper(Socket aClient) {
mClient = aClient;
}
/** loops getting the events **/
public void run() {
LOG.debug("Starting to get data");
try {
final ObjectInputStream ois =
new ObjectInputStream(mClient.getInputStream());
while (true) {
final LoggingEvent event = (LoggingEvent) ois.readObject();
mModel.addEvent(new EventDetails(event));
}
} catch (EOFException e) {
LOG.info("Reached EOF, closing connection");
} catch (SocketException e) {
LOG.info("Caught SocketException, closing connection");
} catch (IOException e) {
LOG.warn("Got IOException, closing connection", e);
} catch (ClassNotFoundException e) {
LOG.warn("Got ClassNotFoundException, closing connection", e);
}
try {
mClient.close();
} catch (IOException e) {
LOG.warn("Error closing connection", e);
}
}
}
/** where to put the events **/
private final MyTableModel mModel;
/** server for listening for connections **/
private final ServerSocket mSvrSock;
/**
* Creates a new <code>LoggingReceiver</code> instance.
*
* @param aModel model to place put received into
* @param aPort port to listen on
* @throws IOException if an error occurs
*/
LoggingReceiver(MyTableModel aModel, int aPort) throws IOException {
setDaemon(true);
mModel = aModel;
mSvrSock = new ServerSocket(aPort);
}
/** Listens for client connections **/
public void run() {
LOG.info("Thread started");
try {
while (true) {
LOG.debug("Waiting for a connection");
final Socket client = mSvrSock.accept();
LOG.debug("Got a connection from " +
client.getInetAddress().getHostName());
final Thread t = new Thread(new Slurper(client));
t.setDaemon(true);
t.start();
}
} catch (IOException e) {
LOG.error("Error in accepting connections, stopping.", e);
}
}
}
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