Windows service with sockets

  • Thread starter Thread starter jwpaco
  • Start date Start date
J

jwpaco

I am new to services and I have quite the task. I need a windows
service that will, once started, open a socket and listen for client
connections. When a connection is made, the client will want the
service to query the db and return a value. This is for use with an IVR
system. Basically, a customer will callin and request some account
information and the service will need to qoery the db and return an
answer to the customer through the IVR system. I have started the
project but I am not getting anywhere fast. I an not even sure I am on
the right path. I thought of using web services, but that is not an
option because the machine this will be installed on will not have IIS
and it cannot be installed. I will paste my code below. Any help is
appreciated.

Justin

<code>

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.ServiceProcess;
using System.Text;
using System.Net;
using System.Net.Sockets;

namespace MyIVR
{
public partial class svcTCP : ServiceBase
{
private readonly int port = 45000;
private readonly IPAddress ip = IPAddress.Parse("127.0.0.1");
private TcpListener listener;



public svcTCP()
{
InitializeComponent();

if (!System.Diagnostics.EventLog.SourceExists("IVRSource"))
{

System.Diagnostics.EventLog.CreateEventSource("IVRSource", "IVRLog");
}
eventLog1.Source = "IVRSource";
eventLog1.Log = "IVRLog";
}

protected override void OnStart(string[] args)
{
svcTCP service = new svcTCP();

eventLog1.WriteEntry("Service Started.");

listener = new TcpListener(ip, port);
listener.Start();
}

protected override void OnStop()
{
eventLog1.WriteEntry("Service Stopped.");
}

protected override void OnContinue()
{
eventLog1.WriteEntry("Service Resumed.");
}
}
}


</code>
 
Hi,

You cannot block the onStart method, you have to create a new thread in the
OnStart and then start listening in this new thread.
If you service support more than one client you then need to spawn a new
thread for each connection in this way you can service several clients at
the same time

let me know if you need some code
 
If you have some example code...that would be great.


Justin


Hi,

You cannot block the onStart method, you have to create a new thread in the
OnStart and then start listening in this new thread.
If you service support more than one client you then need to spawn a new
thread for each connection in this way you can service several clients at
the same time

let me know if you need some code


--
--
Ignacio Machin,
ignacio.machin AT dot.state.fl.us
Florida Department Of Transportation


jwpaco said:
I am new to services and I have quite the task. I need a windows
service that will, once started, open a socket and listen for client
connections. When a connection is made, the client will want the
service to query the db and return a value. This is for use with an IVR
system. Basically, a customer will callin and request some account
information and the service will need to qoery the db and return an
answer to the customer through the IVR system. I have started the
project but I am not getting anywhere fast. I an not even sure I am on
the right path. I thought of using web services, but that is not an
option because the machine this will be installed on will not have IIS
and it cannot be installed. I will paste my code below. Any help is
appreciated.

Justin

<code>

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.ServiceProcess;
using System.Text;
using System.Net;
using System.Net.Sockets;

namespace MyIVR
{
public partial class svcTCP : ServiceBase
{
private readonly int port = 45000;
private readonly IPAddress ip = IPAddress.Parse("127.0.0.1");
private TcpListener listener;



public svcTCP()
{
InitializeComponent();

if (!System.Diagnostics.EventLog.SourceExists("IVRSource"))
{

System.Diagnostics.EventLog.CreateEventSource("IVRSource", "IVRLog");
}
eventLog1.Source = "IVRSource";
eventLog1.Log = "IVRLog";
}

protected override void OnStart(string[] args)
{
svcTCP service = new svcTCP();

eventLog1.WriteEntry("Service Started.");

listener = new TcpListener(ip, port);
listener.Start();
}

protected override void OnStop()
{
eventLog1.WriteEntry("Service Stopped.");
}

protected override void OnContinue()
{
eventLog1.WriteEntry("Service Resumed.");
}
}
}


</code>
Click to expand...
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Hi,

Here is the code, let me know if you miss something

public class MailGateway : System.ServiceProcess.ServiceBase

{

Thread listenerThread;


Queue connectionQueue= null;


protected override void OnStart(string[] args)

{

// TODO: Add code here to start your service.

listenerThread = new Thread( new ThreadStart( ListenerMethod));

listenerThread.Start();

}



protected void ListenerMethod()

{

//In this form we have no control over the children threads

Thread workingthread;

Queue unsyncq = new Queue();

connectionQueue = Queue.Synchronized( unsyncq);

//Now set the listening part

try

{

TcpClient socket;

TcpListener listener = new TcpListener( Convert.ToInt32(
System.Configuration.ConfigurationSettings.AppSettings["Port"]) );

listener.Start();

while( true)

{


socket = listener.AcceptTcpClient();

//Now we have to insert the new socket in the queue

connectionQueue.Enqueue( socket);


//create the new thread that will handle this new connection

workingthread = new Thread( new ThreadStart( TheConnectionHandler));

workingthread.Start();

}

}

catch( Exception e)

{

}

}


public void TheConnectionHandler()

{

TcpClient socket= (TcpClient)connectionQueue.Dequeue();


}

}






--
--
Ignacio Machin,
ignacio.machin AT dot.state.fl.us
Florida Department Of Transportation


jwpaco said:
If you have some example code...that would be great.


Justin


Hi,

You cannot block the onStart method, you have to create a new thread in
the
OnStart and then start listening in this new thread.
If you service support more than one client you then need to spawn a new
thread for each connection in this way you can service several clients at
the same time

let me know if you need some code


--
--
Ignacio Machin,
ignacio.machin AT dot.state.fl.us
Florida Department Of Transportation


jwpaco said:
I am new to services and I have quite the task. I need a windows
service that will, once started, open a socket and listen for client
connections. When a connection is made, the client will want the
service to query the db and return a value. This is for use with an IVR
system. Basically, a customer will callin and request some account
information and the service will need to qoery the db and return an
answer to the customer through the IVR system. I have started the
project but I am not getting anywhere fast. I an not even sure I am on
the right path. I thought of using web services, but that is not an
option because the machine this will be installed on will not have IIS
and it cannot be installed. I will paste my code below. Any help is
appreciated.

Justin

<code>

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.ServiceProcess;
using System.Text;
using System.Net;
using System.Net.Sockets;

namespace MyIVR
{
public partial class svcTCP : ServiceBase
{
private readonly int port = 45000;
private readonly IPAddress ip = IPAddress.Parse("127.0.0.1");
private TcpListener listener;



public svcTCP()
{
InitializeComponent();

if (!System.Diagnostics.EventLog.SourceExists("IVRSource"))
{

System.Diagnostics.EventLog.CreateEventSource("IVRSource", "IVRLog");
}
eventLog1.Source = "IVRSource";
eventLog1.Log = "IVRLog";
}

protected override void OnStart(string[] args)
{
svcTCP service = new svcTCP();

eventLog1.WriteEntry("Service Started.");

listener = new TcpListener(ip, port);
listener.Start();
}

protected override void OnStop()
{
eventLog1.WriteEntry("Service Stopped.");
}

protected override void OnContinue()
{
eventLog1.WriteEntry("Service Resumed.");
}
}
}


</code>
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