sawslogwriter.java

一个完整的XACML工程,学习XACML技术的好例子!

/*
* Copyright (c) 2006, University of Kent
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without 
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this 
* list of conditions and the following disclaimer.
* 
* Redistributions in binary form must reproduce the above copyright notice, 
* this list of conditions and the following disclaimer in the documentation 
* and/or other materials provided with the distribution. 
*
* 1. Neither the name of the University of Kent nor the names of its 
* contributors may be used to endorse or promote products derived from this 
* software without specific prior written permission. 
*
* 2. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS  
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 
* PURPOSE ARE DISCLAIMED. 
*
* 3. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
* POSSIBILITY OF SUCH DAMAGE.
*
* 4. YOU AGREE THAT THE EXCLUSIONS IN PARAGRAPHS 2 AND 3 ABOVE ARE REASONABLE
* IN THE CIRCUMSTANCES.  IN PARTICULAR, YOU ACKNOWLEDGE (1) THAT THIS
* SOFTWARE HAS BEEN MADE AVAILABLE TO YOU FREE OF CHARGE, (2) THAT THIS
* SOFTWARE IS NOT "PRODUCT" QUALITY, BUT HAS BEEN PRODUCED BY A RESEARCH
* GROUP WHO DESIRE TO MAKE THIS SOFTWARE FREELY AVAILABLE TO PEOPLE WHO WISH
* TO USE IT, AND (3) THAT BECAUSE THIS SOFTWARE IS NOT OF "PRODUCT" QUALITY
* IT IS INEVITABLE THAT THERE WILL BE BUGS AND ERRORS, AND POSSIBLY MORE
* SERIOUS FAULTS, IN THIS SOFTWARE.
*
* 5. This license is governed, except to the extent that local laws
* necessarily apply, by the laws of England and Wales.
*/


package issrg.SAWS.util;

import java.io.IOException;
import java.io.File;

import org.apache.log4j.Logger;
import org.apache.log4j.FileAppender;
import org.apache.log4j.PatternLayout;
import org.apache.log4j.Level;
import org.apache.log4j.BasicConfigurator;

/**
 * Class that writes the log for SAWS initialization.
 * @author E. Silva.
 */

public class SAWSLogWriter {

    private Logger log;
    private FileAppender appender;
    private PatternLayout layout;
    
    /**
     * Constructor of SAWSLogWriter.
     * @param className Name of the classe that is using SAWSLogWriter.
     */
    public SAWSLogWriter(String className) {
        this.layout = new PatternLayout("\"%d{yyyy MMM dd HH:mm:ss} [%c]\n -%-5p- %m%n");
        
        try {
            File file = new File("logs/SAWS_debug.log");
            if (!file.exists()) {
                file.createNewFile();
            }
            this.appender = new FileAppender(layout, "logs/SAWS_debug.log"); //define log File location
        } catch (IOException e) {
            //System.out.println("Unable to create/access the log file. System could not be initialized.");
            //System.exit(-1);
             BasicConfigurator.configure();
        }
        
        this.log = Logger.getLogger(className);
        this.log.removeAllAppenders();
        this.log.addAppender(appender);
        this.log.setLevel(Level.DEBUG);
    }
    
    /**
     * Method that writes the log message to the log file.
     * @param message Message to be written
     */
    public void write(Object message) {
        this.log.debug(message);
    }
}