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SilverTunnel-NG Netlib is a free library for the Java programming language that implements and encapsulates all the complex network protocol stuff needed for anonymous communication over the Tor anonymity network. Netlib can be easily integrated in almost every existing and new Java application. The library requires Java 1.6/Java SE 6 or a newer version. The original silvertunnel Netlib can be found here : silvertunnel.org

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/*
 * silvertunnel.org Netlib - Java library to easily access anonymity networks
 * Copyright (c) 2009-2012 silvertunnel.org
 *
 * 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 2 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 .
 */

package org.silvertunnel_ng.netlib.layer.logger;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.logging.Level;

import org.silvertunnel_ng.netlib.api.NetSocket;
import org.slf4j.Logger;

/**
 * NetSocket of transparent NetLayer that logs input and output streams.
 * 
 * @author hapke
 */
public class LoggingNetSocket implements NetSocket
{
	private final NetSocket lowerLayerSocket;
	private final Logger summaryLog;
	private final Level summaryLogLevel;
	private final Logger detailLog;
	private final Level detailLogLevel;
	private final boolean logContent;
	private final String topDownLoggingPrefix;
	private final String bottomUpLoggingPrefix;

	private InputStream in;
	private OutputStream out;

	public LoggingNetSocket(NetSocket lowerLayerSocket, Logger summaryLog,
			Level summaryLogLevel, Logger detailLog, Level detailLogLevel,
			boolean logContent, String topDownLoggingPrefix,
			String bottomUpLoggingPrefix)
	{
		this.lowerLayerSocket = lowerLayerSocket;
		this.summaryLog = summaryLog;
		this.summaryLogLevel = summaryLogLevel;
		this.detailLog = detailLog;
		this.detailLogLevel = detailLogLevel;
		this.logContent = logContent;
		this.topDownLoggingPrefix = topDownLoggingPrefix;
		this.bottomUpLoggingPrefix = bottomUpLoggingPrefix;
	}

	@Override
	public void close() throws IOException
	{
		lowerLayerSocket.close();
	}

	@Override
	public InputStream getInputStream() throws IOException
	{
		if (in == null)
		{
			final BufferedLogger bufferedLogger = new BufferedLogger(
					summaryLog, summaryLogLevel, detailLog, detailLogLevel,
					logContent, bottomUpLoggingPrefix);
			in = new LoggingInputStream(lowerLayerSocket.getInputStream(),
					bufferedLogger);
		}
		return in;
	}

	@Override
	public OutputStream getOutputStream() throws IOException
	{
		if (out == null)
		{
			final BufferedLogger bufferedLogger = new BufferedLogger(
					summaryLog, summaryLogLevel, detailLog, detailLogLevel,
					logContent, topDownLoggingPrefix);
			out = new LoggingOutputStream(lowerLayerSocket.getOutputStream(),
					bufferedLogger);
		}
		return out;
	}

	@Override
	public String toString()
	{
		return "LoggingNetSocket(" + lowerLayerSocket + ")";
	}
}