com.od.jtimeseries.component.AbstractJTimeSeriesComponent.java Source code

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Here is the source code for com.od.jtimeseries.component.AbstractJTimeSeriesComponent.java

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/**
 * Copyright (C) 2011 (nick @ objectdefinitions.com)
 *
 * This file is part of JTimeseries.
 *
 * JTimeseries is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * JTimeseries 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with JTimeseries.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.od.jtimeseries.component;

import com.od.jtimeseries.util.logging.LogMethods;
import com.od.jtimeseries.util.logging.LogMethodsFactory;
import com.od.jtimeseries.util.logging.LogUtils;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.io.File;
import java.net.InetAddress;
import java.net.UnknownHostException;

/**
 * Created by IntelliJ IDEA.
 * User: Nick Ebbutt
 * Date: 04-Jun-2010
 * Time: 13:28:25
 */
public class AbstractJTimeSeriesComponent {

    protected static LogMethods logMethods = LogUtils.getLogMethods(AbstractJTimeSeriesComponent.class);
    protected static ApplicationContext ctx;

    protected static void initialize(Class logClass) {
        initializeLogging(logClass);
        initializeApplicationContext();
    }

    private static void initializeLogging(Class logClass) {
        //set the hostname as a system property so that it is available on startup to the spring context property placeholder configurer
        System.setProperty("hostname", getHostname(logClass));

        //First read the logging configuration and set this up before other classes are loaded, since other classes in JTimeSeriesServer will
        //initialize their static loggers when they are first loaded, and the logging subsystem needs to be set up first.
        ApplicationContext loggingContext = new ClassPathXmlApplicationContext("logContext.xml");
        configureLogging(loggingContext, logClass);

        logMethods = LogUtils.getLogMethods(logClass);
    }

    protected static LogMethods getLogMethods() {
        return logMethods;
    }

    protected static ApplicationContext getCtx() {
        return ctx;
    }

    private static void configureLogging(ApplicationContext loggingContext, Class logClass) {
        LogMethodsFactory f = (LogMethodsFactory) loggingContext.getBean("logMethodsFactory",
                LogMethodsFactory.class);
        boolean logMethodsOk = f.isUsable();
        if (logMethodsOk) {
            LogUtils.setLogMethodFactory(f);
        } else {
            LogUtils.getLogMethods(logClass)
                    .info("Cannot write to directory for logfile path "
                            + ((File) loggingContext.getBean("logFileDirectory")).getAbsolutePath()
                            + ". Will log to standard out");
        }
    }

    private static String getHostname(Class logClass) {
        String result = "(Unknown Host)";
        try {
            result = InetAddress.getLocalHost().getHostName();
            int lastPeriod = result.indexOf(".");
            if (lastPeriod > 0) {
                result = result.substring(0, lastPeriod);
            }
        } catch (UnknownHostException e) {
            LogUtils.getLogMethods(logClass).error("Failed to find hostname", e);
        }
        return result;
    }

    protected static void initializeApplicationContext() {
        logMethods.info("Reading Spring Application Context");
        ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
    }
}