com.joliciel.talismane.utils.LogUtils.java Source code

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Here is the source code for com.joliciel.talismane.utils.LogUtils.java

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///////////////////////////////////////////////////////////////////////////////
//Copyright (C) 2012 Assaf Urieli
//
//This file is part of Talismane.
//
//Talismane is free software: you can redistribute it and/or modify
//it under the terms of the GNU Affero General Public License as published by
//the Free Software Foundation, either version 3 of the License, or
//(at your option) any later version.
//
//Talismane 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 Affero General Public License for more details.
//
//You should have received a copy of the GNU Affero General Public License
//along with Talismane.  If not, see <http://www.gnu.org/licenses/>.
//////////////////////////////////////////////////////////////////////////////
package com.joliciel.talismane.utils;

import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;

import org.apache.commons.logging.Log;

/**
 * Various generic logging utilities.
 * @author Assaf Urieli
 *
 */
public class LogUtils {
    private static final int MEGABYTE = 1024 * 1024;

    /**
    * Return the current exception & stack trace as a String.
    */
    public static String getErrorString(Throwable e) {
        String s = null;
        try {
            StringWriter sw = new StringWriter();
            PrintWriter ps = new PrintWriter((Writer) sw);
            e.printStackTrace(ps);
            sw.flush();
            s = sw.toString();
            sw.close();
        } catch (IOException ioe) {
            // do nothing!
        }
        return s;
    }

    /**
    * Log the exception passed.
    */
    public static void logError(Log logger, Throwable e) {
        logger.error(e);
        logger.error(LogUtils.getErrorString(e));
    }

    /**
     * Log the available runtime memory.
     */
    public static void logMemory(Log logger) {
        if (logger.isTraceEnabled()) {
            //Getting the runtime reference from system
            Runtime runtime = Runtime.getRuntime();
            logger.trace("##### Heap utilization statistics [MB] #####");

            //Print used memory
            logger.trace("Used Memory:" + (runtime.totalMemory() - runtime.freeMemory()) / MEGABYTE);

            //Print free memory
            logger.trace("Free Memory:" + runtime.freeMemory() / MEGABYTE);

            //Print total available memory
            logger.trace("Total Memory:" + runtime.totalMemory() / MEGABYTE);

            //Print Maximum available memory
            logger.trace("Max Memory:" + runtime.maxMemory() / MEGABYTE);
        }
    }
}