RegistrationDaemon.java

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package com.sun.enterprise.registration.impl;

import com.sun.enterprise.registration.RegistrationService;
import com.sun.enterprise.registration.RegistrationException;        
import java.io.File;
import java.util.Timer;
import java.util.TimerTask;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * Entry point to start Registration Daemon thread.
 * @author Mitesh Meswani
 * 
 */
public class RegistrationDaemon {
    // The interval for timer in miliseconds defaults to 1HR 1 Hr * 60 mins * 60 sec * 1000 ms
    private static final long TIMER_INTERVAL = Long.getLong("com.sun.enterprise.registration.TIMER_INTERVAL", 24  * 60 * 60 * 1000);
    private static final Logger logger = RegistrationLogger.getLogger();

    public static void start(File serviceTagRegistry) {
        final SysnetRegistrationService registrationService = new SysnetRegistrationService(serviceTagRegistry);
        // Initiate the Daemon thread only if the repository file is writable.
        // Let the thread start even if there are no tags actually in NOT_TRANSFERRED becaue the check would do the
        // same work as an attempt to transfer the tags - which is to open the file an enumerate the tags.
        if (registrationService.isRegistrationEnabled() ) {
            final Timer registrationTimer = new Timer("registration", true); //Mark the timer as daemon so that it does not hold up appserver shutdown
            TimerTask registrationTask = new TimerTask() {
                public void run() {
                    try {
                        registrationService.transferEligibleServiceTagsToSysNet();
                        // Transfer was succseeful cancel the timer thread
                        registrationTimer.cancel();
                    } catch (RegistrationException e) {
                        //Log exception.  
                        logger.log(Level.INFO, "Exception while transfering tags" + e);
                    }
                }
            };
            registrationTimer.schedule(registrationTask, 0L, TIMER_INTERVAL);
        }
    }
}