org.robotbrains.data.cloud.timeseries.server.logging.Log4jLoggingProvider.java Source code

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Here is the source code for org.robotbrains.data.cloud.timeseries.server.logging.Log4jLoggingProvider.java

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/*
 * Copyright (C) 2015 Keith M. Hughes.
 *
 * 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 org.robotbrains.data.cloud.timeseries.server.logging;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.core.config.ConfigurationSource;
import org.apache.logging.log4j.core.config.Configurator;

import com.google.common.io.Closeables;

/**
 * A logging provider that uses Log4J
 * 
 * @author Keith M. Hughes
 */
public class Log4jLoggingProvider {

    /**
     * Path to the configuration file.
     * 
     * <p>
     * Can be {@code null}.
     */
    private String configurationFilePath;

    /**
     * Construct a new logging provider.
     * 
     * @param configurationFilePath
     *          path to the configuration file, can be {@code null}.
     */
    public Log4jLoggingProvider(String configurationFilePath) {
        this.configurationFilePath = configurationFilePath;
    }

    /**
     * Start the logging provider.
     */
    public void startup() {
        InputStream configurationStream = null;
        try {
            ConfigurationSource source;
            if (configurationFilePath != null) {
                File configurationFile = new File(configurationFilePath);
                configurationStream = new FileInputStream(configurationFile);
                source = new ConfigurationSource(configurationStream, configurationFile);
            } else {
                configurationStream = getClass().getClassLoader().getResourceAsStream("log4j.xml");
                source = new ConfigurationSource(configurationStream);
            }
            Configurator.initialize(null, source);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } finally {
            try {
                Closeables.close(configurationStream, true);
            } catch (IOException e) {
                // Won't happen
            }
        }
    }

    /**
     * Get the logger for the application.
     * 
     * @return the logger
     */
    public Logger getLog() {
        return LogManager.getFormatterLogger("foo");
    }
}