com.comcast.cats.configuration.CatsLogger.java Source code

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Here is the source code for com.comcast.cats.configuration.CatsLogger.java

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/**
 * Copyright 2014 Comcast Cable Communications Management, LLC
 *
 * This file is part of CATS.
 *
 * CATS 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.
 *
 * CATS 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 CATS.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.comcast.cats.configuration;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import javax.inject.Named;

import org.apache.commons.io.FileUtils;
import org.apache.log4j.xml.DOMConfigurator;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.annotation.DependsOn;

import com.comcast.cats.domain.configuration.CatsHome;

@Named()
@DependsOn(value = "catsHome")
/**
 * Scan for the logger after we have a reference to catsHome. This class
 * uses apache log4j explicitly as this loads the log4j configuration file.
 */
public class CatsLogger {

    public static final String CATS_HOME_CONF_RELATIVE_DIR = "conf";
    public static final String CATS_LOG_CONFIGURATION_XML = System.getProperty(CatsHome.CATS_HOME_SYSTEM_PROPERTY)
            + System.getProperty("file.separator") + CATS_HOME_CONF_RELATIVE_DIR
            + System.getProperty("file.separator") + "cats-logging.xml";

    private static final Logger logger = LoggerFactory.getLogger(CatsLogger.class);

    /**
     * Scan for the logger file definition and configure it.
     */
    public CatsLogger() {
        File destFile = new File(CATS_LOG_CONFIGURATION_XML);
        if (!destFile.exists() || !destFile.isFile()) {
            placeLogFileinCatsHome(destFile);
        }

        DOMConfigurator.configureAndWatch(destFile.getPath(), 30000L);
    }

    private void placeLogFileinCatsHome(File destFile) {
        byte[] store = new byte[1024];
        OutputStream os = null;
        InputStream is = getClass().getResourceAsStream("/cats-logging.xml");
        try {
            FileUtils.touch(destFile);
            os = new FileOutputStream(destFile);
            int c;
            while ((c = is.read(store, 0, store.length)) != -1) {
                os.write(store, 0, c);
            }

            logger.info("Log configuration file is placed in to location: " + destFile.getPath());
        } catch (IOException e) {
            logger.error("Error placing log configuration file in to catshome: " + e);
        } finally {
            try {
                if (null != is) {
                    is.close();
                }
                if (null != os) {
                    os.close();
                }
            } catch (IOException e) {
                logger.error("Error closing input/ouptput stream: " + e);
            }
        }
    }
}