using System;
using System.Threading;

using System.Diagnostics;

using System.ServiceModel;
using System.ServiceModel.Description; 


namespace MQFilter
{

    [System.ComponentModel.DesignerCategory("Code")]
    class PumpService : System.ServiceProcess.ServiceBase
    {
        const int INTERVAL = 5;
        TimeSpan m_delay = new TimeSpan(0, 0, 0, INTERVAL, 0);

        private Thread m_thread = null;
        private static ManualResetEvent m_shutdownEvent = new ManualResetEvent(false);

        FilterController filterController = null;

        
        protected void InitializeComponent()
        {
            
            // Initialize the operating properties for the service.
            this.CanPauseAndContinue = false;
            this.CanShutdown = true;
            this.CanHandleSessionChangeEvent = true;
            this.ServiceName = "DaoMqPump2";
        }

        // Start the service.
        protected override void OnStart(string[] args)
        {
            try
            {
                //first load transports
                filterController = FilterController.getInstance();


                //finally start the worker thread                
                // create our threadstart object to wrap our delegate method
                ThreadStart ts = new ThreadStart(this.ServiceWorkerMethod);

                // create the manual reset event and
                // set it to an initial state of unsignaled
                m_shutdownEvent = new ManualResetEvent(false);

                // create the worker thread
                m_thread = new Thread(ts);

                // go ahead and start the worker thread
                m_thread.Start();                

            }
            catch (Exception e)
            {
                EventLog.WriteEntry("MQFilter", "Error starting DaoMqPump2: " + e.Message, EventLogEntryType.Error);
                throw e;
            }
        }

        // Stop this service.
        protected override void OnStop()
        {
            // New in .NET Framework version 2.0.
            this.RequestAdditionalTime(10000);

            // signal the event to shutdown
            m_shutdownEvent.Set();

            // wait for the thread to stop giving it 10 seconds
            m_thread.Join(10000);

            // call the base class 
            base.OnStop();

            this.ExitCode = 0;
        }


        public void ServiceWorkerMethod()
        {
            bool bSignaled = false;
            int count = 20; //count starts high so we get to pump during the first iteration
            try
            {                
                do
                {
                    // Block if the service is paused or is shutting down.
                    bSignaled = m_shutdownEvent.WaitOne(m_delay, true);

                    // if we were signaled to shutdow, exit the loop
                    if (bSignaled == true)
                        break;

                    count ++;

                    int elapsed = INTERVAL * count;
                    if (elapsed >= 30) // only run every 30th second
                    {
                        filterController.transportAllMessages();
                        count = 0;//reset counter
                    }

                }
                while (true);
            }
            catch (ThreadAbortException)
            {
                // Another thread has signalled that this worker
                // thread must terminate.  Typically, this occurs when
                // the main service thread receives a service stop 
                // command.

                // Write a trace line indicating that the worker thread
                // is exiting.  Notice that this simple thread does
                // not have any local objects or data to clean up.
            }
        }
 

    }
}