DuplicatePrintStream.java

/*******************************************************************************
 * 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 staticContent.framework.logger;

import java.io.PrintStream;


// printstream that writes all data provided to it to two printstreams (= duplicates the stream)
public class DuplicatePrintStream extends PrintStream {

	private PrintStream outputStream2;
	private String prefix;
	
	
	public DuplicatePrintStream(PrintStream outputStream1, PrintStream outputStream2, boolean isErrorStream) {
		
		super(outputStream1);
		this.outputStream2 = outputStream2;
		this.prefix = isErrorStream ? "ERR:" : "";
		
	}

	
	@Override
	public void write(byte buf[], int off, int len) {

		try {
			
			super.write(buf, off, len);
			outputStream2.write(buf, off, len);
			
		} catch (Exception e) {
			e.printStackTrace();
		}
		
	}

	
	@Override
	public void flush() {
		
		super.flush();
		outputStream2.flush();
		
	}

	private final static boolean DEBUG = false;
	@Override
	public void println(String s) {
		if (DEBUG){
			Throwable t = new Throwable();
			StackTraceElement[] elements = t.getStackTrace();
			String postprefix = elements[1].getClassName();
			//postprefix += "."+elements[0].getMethodName();
			//postprefix += "called by"+elements[1].getMethodName();
			super.println(prefix + System.currentTimeMillis() +" " +postprefix + ": " + s);
		} else {
			super.println(prefix + System.currentTimeMillis() + ": " + s);
		}
	}

}