uk.org.raje.maven.plugin.msbuild.LoggingHandler.java Source code

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Here is the source code for uk.org.raje.maven.plugin.msbuild.LoggingHandler.java

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/*
 * Copyright 2013 Andrew Everitt, Andrew Heckford, Daniele Masato
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package uk.org.raje.maven.plugin.msbuild;

import java.util.logging.Handler;
import java.util.logging.Level;
import java.util.logging.LogRecord;
import java.util.logging.Logger;

import org.apache.maven.plugin.logging.Log;

/**
 * This class catches log messages generated by the standard Java logging framework and relays them onto a Maven logger.
 */
final class LoggingHandler extends Handler {
    /**
     * Create a new log handler that catches messages generated by a standard Java logger.
     * @param name the name of the standard Java logger from which to catch messages
     */
    public LoggingHandler(String name) {
        javaLogger = Logger.getLogger(name);
        javaLogger.addHandler(this);

        //Stop the propagation of log messages to the logger's parent (which could be the console). In this way we 
        // ensure that only Maven prints out log messages and prevent duplication by the Java logging framework.
        javaLogger.setUseParentHandlers(false);
    }

    /**
     * Set the Maven logger that will output the messages generated by the Java logger specified in {@link 
     * LoggingHandler#LoggingHandler(name)}.
     * @param log the Maven logger that will output the messages generated by the Java logger 
     */
    public void setLog(Log log) {
        this.mavenLogger = log;

        //Match the log level of the Java logger with that set in the Maven logger 
        if (log.isDebugEnabled()) {
            javaLogger.setLevel(Level.FINE);
        } else if (log.isInfoEnabled()) {
            javaLogger.setLevel(Level.INFO);
        } else if (log.isWarnEnabled()) {
            javaLogger.setLevel(Level.WARNING);
        } else {
            javaLogger.setLevel(Level.SEVERE);
        }
    }

    @Override
    public void publish(LogRecord record) {
        int level = record.getLevel().intValue();

        //Cast a log message from the Java logger into the corresponding message for the Maven logger 
        if (level <= Level.FINE.intValue()) {
            mavenLogger.debug(record.getMessage());
        } else if (level <= Level.INFO.intValue()) {
            mavenLogger.info(record.getMessage());
        } else if (level <= Level.WARNING.intValue()) {
            mavenLogger.warn(record.getMessage());
        } else {
            mavenLogger.error(record.getMessage());
        }
    }

    @Override
    public void flush() {
    }

    @Override
    public void close() {
    }

    private Log mavenLogger;
    private Logger javaLogger;
}