CODEWITHSUNDEEP
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Yoda
Yoda

Reputation: 18068

When does Start-Service know that win service actually completed full startup process and is in fully operational state?

When I create a win service I star listening on a specified port. I want to be sure that all the process of listening on that port has finished successfully before the service has running status and Start-Service command will be finished.

When I invoke Start-Service -Name $NameOfTheService in Powershell when does powershell decides to go to the next instruction?

Is this code can cause potential issues:

public WinService()
{
    InitializeComponent();
    OpenPortsCreateEndpoints();
}

Should I put openning ports for instance in protected override void OnStart(string[] args) or somewhere else?

Upvotes: 1

Views: 51

Answers (1)

henrycarteruk
henrycarteruk

Reputation: 13227

Powershell doesn't interact with the Service directly, it uses the inbuilt Service Control Manager (SCM).

Powershell requests SCM to start the service, it does so and the service then reports its status to SCM. Powershell itself just waits for SCM to signal that the service status is Running before continuing.

Services normally report their status as SERVICE_START_PENDING while they are initialising, then signal SERVICE_RUNNING once they are in a ready state.

The OnStart method must return to the operating system after the service's operation has begun. It must not loop forever or block, so use it only to initialise the service.

Walkthrough: Create a Windows service app covers all the basics, and contains example code for Set service status.

Upvotes: 1

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