nl.tue.gale.ae.LogManager.java Source code

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Here is the source code for nl.tue.gale.ae.LogManager.java

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/*
    
   This file is part of GALE (Generic Adaptation Language and Engine).
    
GALE is free software: you can redistribute it and/or modify it under the 
terms of the GNU Lesser General Public License as published by the Free 
Software Foundation, either version 3 of the License, or (at your option) 
any later version.
    
GALE 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 Lesser General Public License for 
more details.
    
You should have received a copy of the GNU Lesser General Public License
along with GALE. If not, see <http://www.gnu.org/licenses/>.
    
 */
/**
 * LogManager.java
 * Last modified: $Date$
 * In revision:   $Revision$
 * Modified by:   $Author$
 *
 * Copyright (c) 2008-2011 Eindhoven University of Technology.
 * All Rights Reserved.
 *
 * This software is proprietary information of the Eindhoven University
 * of Technology. It may be used according to the GNU LGPL license.
 */
package nl.tue.gale.ae;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Map;

import com.google.common.base.Function;
import com.google.common.collect.MapMaker;

public class LogManager {
    private static File logDir = null;

    public void setLogDir(org.springframework.core.io.Resource logDirP) {
        try {
            logDir = logDirP.getFile();
            if (!logDir.exists())
                logDir.mkdir();
        } catch (Exception e) {
            throw new IllegalArgumentException("unable to open log directory: " + e.getMessage());
        }
    }

    private static final Map<String, PrintWriter> cache = new MapMaker()
            .makeComputingMap(new Function<String, PrintWriter>() {
                @Override
                public PrintWriter apply(String input) {
                    try {
                        return new PrintWriter(
                                new BufferedWriter(new FileWriter(new File(logDir, input + ".log"), true)));
                    } catch (IOException e) {
                        throw new IllegalArgumentException(e.getMessage(), e);
                    }
                }
            });

    public void log(String file, String log) {
        cache.get(file).println(log);
    }

    public void destroy() {
        for (Map.Entry<String, PrintWriter> entry : cache.entrySet())
            entry.getValue().close();
    }
}