com.claytablet.app.MockCron.java Source code

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Here is the source code for com.claytablet.app.MockCron.java

Source

package com.claytablet.app;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.claytablet.model.AssetTaskMap;
import com.claytablet.module.MockProviderModule;
import com.claytablet.service.event.EventListener;
import com.claytablet.service.event.ProviderStatePoller;
import com.google.inject.Guice;
import com.google.inject.Injector;

/**
 * Copyright 2007 Clay Tablet Technologies Inc.
 * 
 * <p>
 * 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 <a
 * href="http://www.apache.org/licenses/LICENSE-2.0">http://www.apache.org/licenses/LICENSE-2.0</a>
 * 
 * <p>
 * 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.
 * 
 * <p>
 * 
 * @author <a href="mailto:drapin@clay-tablet.com">Dave Rapin</a>
 * 
 * <p>
 * Mock event cron that will inject and call the event listener service and the
 * state poller service at a configurable interval. Default sleep interval is
 * 300 seconds (5 minutes).
 * 
 * <p>
 * When called the event listener service checks for new message events,
 * validates them, and passes them to the receiver for processing.
 * 
 * <p>
 * When called the state poller checks for changes within the provider system
 * and sends appropriate updates back to the platform.
 */
public class MockCron {

    private static final Log log = LogFactory.getLog(MockCron.class);

    // the inteval to sleep for in seconds (300 = 5 minutes)
    private static final int SLEEP_INTERVAL = 5;

    // the maximum number of messages to retrieve and process per interval. 0
    // indicates no limit (all messages available)
    private static final int MAX_MESSAGES = 0;

    /**
     * @param args
     * @throws Exception
     */
    public static void main(String args[]) throws Exception {

        log.debug("Initialize dependencies.");

        // setup the preferred Guice injector for DI
        Injector injector = Guice.createInjector(new MockProviderModule());

        // load the listener
        EventListener listener = injector.getInstance(EventListener.class);

        // load the poller
        ProviderStatePoller poller = injector.getInstance(ProviderStatePoller.class);

        log.debug("Start the endless loop.");
        while (true) {

            log.debug("Check for messages.");
            listener.checkMessages(MAX_MESSAGES);

            log.debug("Check for state changes.");
            poller.poll();

            log.debug("Retrieve the asset task mappings.");
            AssetTaskMap assetTaskMap = injector.getInstance(AssetTaskMap.class);
            if (assetTaskMap.size() > 0) {
                log.debug("Save the asset task mappings.");
                assetTaskMap.save();
            }

            log.debug("sleeping for " + SLEEP_INTERVAL + " seconds.");
            Thread.sleep(SLEEP_INTERVAL * 1000);

        }

    }

}