Windows Service calling Web Service.

[mike55]

Hi all,

 

Is it possible for a windows service to call a web service? Have successfully added a web reference to the web service and I am running the windows service, but it seems to be having no effect.

 

Any suggestions?

 

Mike55.

[TripleB]

Yes it is possible, what exactly are you trying to do?

[mike55]

Have a web service for sending SMS messages via the Http, hoping to use the windows service to call the web service every 5 minutes to send the messages in the message queue. Don't know where the problem is occuring. The web service is working correctly as I am using it with a standard windows application. Must look into the windows service as the problem might be there.

 

Mike55.

[TripleB]

I had the same problem in the same situation, also tried to send sms through webservice, but this one was located on a linux server, I am going to look at my project to see how I've solved it,

 

Greetz

[rjonas]

Does the web service attempt to perform any user authentication, and could this be failing due to it running under the system user account rather than as a normal user?

 

Can you easily test the part of the windows service that calls the web service as a standalone application running as the current user, and does this work?

 

Regards

Richard

[TripleB]

This is the code I used, nothing to fancy just using a timer to call the webservice every 8000, and according to the result of the parsing I call another webservice to send the message.

 

#pragma once

using namespace System;
using namespace System::Collections;
using namespace System::ServiceProcess;
using namespace System::ComponentModel;
using namespace System:: Diagnostics;
using namespace GsoapSMS;
using namespace MessagingSystem; 
using namespace System::Text;


namespace CheckSMS
{
/// <summary> 
/// Summary for CheckSMSWinService
/// </summary>
///
/// WARNING: If you change the name of this class, you will need to change the 
///          'Resource File Name' property for the managed resource compiler tool 
///          associated with all .resx files this class depends on.  Otherwise,
///          the designers will not be able to interact properly with localized
///          resources associated with this form.
public __gc class CheckSMSWinService : public System::ServiceProcess::ServiceBase 
{
public:
	CheckSMSWinService()
	{
		InitializeComponent();    
	}
	/// <summary>
	/// Clean up any resources being used.
	/// </summary>
	void Dispose(bool disposing)
	{
		if (disposing && components)
		{
			components->Dispose();
		}
		__super:: Dispose(disposing);
	}
private:
	bool stopping;
	int loopsleep;              //milliseconds
	Threading::Thread* servicethread;
private: System::Timers::Timer *  tmrCheck;
		 sms *LocalSMS;

protected:
	/// <summary>
	/// Set things in motion so your service can do its work.
	/// </summary>
	void OnStart(String* args[])
	{
		Threading::ThreadStart* threadStart = new Threading::ThreadStart(this,mainLoop);
		servicethread = new Threading::Thread(threadStart);
		servicethread->Start();
	}

	void mainLoop()
	{
		loopsleep = 10000;       //milliseconds
		stopping = false;
		LocalSMS = new sms();
		
		ArrayList *list = new ArrayList();
		while (!stopping)
		{
			
			if(tmrCheck->Enabled == false)
				tmrCheck->Enabled = true;
			Threading::Thread::Sleep(loopsleep);
		}
     }


	void ParseMessage(SmsInfo* info)
	{

		if(info->Message->StartsWith("[u]"))
		{
			SyntraWebService *msging = new SyntraWebService();
			StringBuilder *strBuild = new StringBuilder();
			System::Object* list[] = msging->AllContacts();
			for(int i=0;i<list->Count;i++)
			{
				strBuild->Append(list[i]->ToString());
				if(i < list->Count -1)
					strBuild->Append(",");

			}
			LocalSMS->SMSSend(info->Number->ToString(),strBuild->ToString()); 
		}
		
	}

	/// <summary>
	/// Stop this service.
	/// </summary>
	void OnStop()
	{     
		stopping = true;
	}
   		
private:
	/// <summary>
	/// Required designer variable.
	/// </summary>
	System::ComponentModel::Container *components;

	/// <summary> 
	/// Required method for Designer support - do not modify 
	/// the contents of this method with the code editor.
	/// </summary>	
	void InitializeComponent(void)
	{
		this->tmrCheck = new System::Timers::Timer();
		(__try_cast<System::ComponentModel::ISupportInitialize *  >(this->tmrCheck))->BeginInit();
		// 
		// tmrCheck
		// 
		this->tmrCheck->Enabled = true;
		this->tmrCheck->Interval = 8000;
		this->tmrCheck->Elapsed += new System::Timers::ElapsedEventHandler(this, tmrCheck_Elapsed);
		// 
		// CheckSMSWinService
		// 
		this->CanPauseAndContinue = true;
		this->ServiceName = S"CheckSMS";
		(__try_cast<System::ComponentModel::ISupportInitialize *  >(this->tmrCheck))->EndInit();

	}		
private: System::Void tmrCheck_Elapsed(System::Object *  sender, System::Timers::ElapsedEventArgs *  e)
		 {
			 SmsInfo* SmsRetval;
			 do
			{
				if((SmsRetval = LocalSMS->SMSCheck())!= 0)
				{
					ParseMessage(SmsRetval);
				}
			}while(SmsRetval->NbrofSms > 0);
		 }

};
}

 

greetz

[PlausiblyDamp]

Are you sure the timer even is firing when the service is running?

[mike55]

Hadn't though of that, will have a look at it as every other thing seems to be working correctly, i.e. the web service works correctly when I call the web methods from IE. There is no errors occuring with the windows service, as I have set it up that it will restart the machine on the first error.

 

Mike55