org.hbird.business.core.Starter.java Source code

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Here is the source code for org.hbird.business.core.Starter.java

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/**
 * Licensed to the Hummingbird Foundation (HF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The HF licenses this file to You 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.hbird.business.core;

import org.apache.camel.main.Main;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.support.FileSystemXmlApplicationContext;

/**
 * Provides a standard main method.
 * 
 * The Starter can be used to start hbird assemblies. The asssembly is defined in an
 * XML file following the Camel format. The file to be used is either defined using the
 * 'hbird.assembly' system property or by putting a 'main.xml' in the classpath.
 * 
 * @author Gert Villemos
 * 
 */
public class Starter {

    public static final String CONTEXT_NAME = "Hummingbird";

    /** Class logger */
    private static Logger LOG = LoggerFactory.getLogger(Starter.class);

    private static int counter = 0;

    /**
     * The main method
     * 
     * @param args Arguments are NOT used
     * @throws Exception
     */
    public static void main(String[] args) throws Exception {

        /* Configure log4j to allow dynamic changes to the log4j file. */
        String log4jFile = System.getProperty("log4j.configuration");
        if (log4jFile != null) {
            org.apache.log4j.PropertyConfigurator.configureAndWatch(log4jFile, 5000);
        }

        Starter starter = new Starter();
        starter.boot();
    }

    /**
     * Method to read the XML assembly file and run the main
     * 
     * @throws Exception
     */
    @SuppressWarnings("resource")
    protected void boot() throws Exception {
        LOG.info("Starting Hummingbird based system.");

        Main main = new Main();
        main.enableHangupSupport();

        /* Read the configuration file as the first argument. If not set, then we try the default name. */
        String assemblyFile = System.getProperty("hbird.assembly") == null ? "classpath:main.xml"
                : System.getProperty("hbird.assembly");

        LOG.info("Reading assembly file '{}'", assemblyFile);

        FileSystemXmlApplicationContext context = new FileSystemXmlApplicationContext(new String[] { assemblyFile },
                false);
        context.setDisplayName(CONTEXT_NAME + "-" + (++counter));
        LOG.info("Created Spring AppicationContext '{}'", context.getDisplayName());
        context.refresh();
        main.run();
    }
}