nz.co.jsrsolutions.ds3.DataScraper3.java Source code

Introduction

Here is the source code for nz.co.jsrsolutions.ds3.DataScraper3.java

Source

/* -*- mode: java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/*
 * @(#)DataScraper3.java        
 *
 * Copyright (c) 2012 JSR Solutions Limited
 * 4 Viridian Lane, Auckland, 0632.  New Zealand
 * All rights reserved.
 *
 * This software is the confidential and proprietary information of JSR
 * Solutions Limited. ("Confidential Information").  You shall not
 * disclose such Confidential Information and shall use it only in
 * accordance with the terms of the license agreement you entered into
 * with JSR Solutions Limited.
 */

package nz.co.jsrsolutions.ds3;

import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.CommandLineParser;
import org.apache.commons.cli.GnuParser;
import org.apache.commons.cli.HelpFormatter;
import org.apache.commons.cli.ParseException;
import org.apache.log4j.Logger;
import org.quartz.Scheduler;
import org.springframework.context.support.ClassPathXmlApplicationContext;

final class DataScraper3 {

    private static final transient Logger logger = Logger.getLogger(DataScraper3.class);

    private static final String SPRING_CONFIG_PREFIX = new String("service.");

    private static final String SPRING_CONFIG_SUFFIX = new String(".xml");

    private static final String SCHEDULER_BEAN_ID = new String("scheduler");

    private static final String CONTROLLER_BEAN_ID = new String("controller");

    private DataScraper3() {

    }

    public static void main(String[] args) {

        logger.info("Starting application [ ds3 ] ...");

        ClassPathXmlApplicationContext context = null;

        try {

            CommandLineParser parser = new GnuParser();

            CommandLine commandLine = parser.parse(CommandLineOptions.Options, args);

            if (commandLine.getOptions().length > 0 && !commandLine.hasOption(CommandLineOptions.HELP)) {

                StringBuffer environment = new StringBuffer();
                environment.append(SPRING_CONFIG_PREFIX);
                environment.append(commandLine.getOptionValue(CommandLineOptions.ENVIRONMENT));
                environment.append(SPRING_CONFIG_SUFFIX);

                context = new ClassPathXmlApplicationContext(environment.toString());
                context.registerShutdownHook();

                if (commandLine.hasOption(CommandLineOptions.SCHEDULED)) {

                    Scheduler scheduler = context.getBean(SCHEDULER_BEAN_ID, Scheduler.class);
                    scheduler.start();

                    Object lock = new Object();
                    synchronized (lock) {
                        lock.wait();
                    }

                } else {
                    DataScraper3Controller controller = context.getBean(CONTROLLER_BEAN_ID,
                            DataScraper3Controller.class);
                    controller.executeCommandLine(commandLine);
                }

            } else {

                HelpFormatter formatter = new HelpFormatter();
                formatter.printHelp("ds3", CommandLineOptions.Options);

            }

        } catch (DataScraper3Exception ds3e) {
            logger.error("Failed to execute command", ds3e);
        } catch (ParseException pe) {

            logger.error("Failed to parse command line", pe);

        } catch (Exception e) {

            logger.error("Failed to execute command", e);

        } finally {
            if (context != null) {
                context.close();
            }
        }

        logger.info("Exiting application [ ds3 ] ...");

    }

}