Singleton instance of web service?

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davebythesea - 21 Dec 2007 16:10 GMT

Hi folks,

I'm just curious if it is possible to create a Singleton instance of a Web
Service? Currently I create my web services in VS 2005, and then in my
applications I add the Web Service via 'Add web Reference', which as you know
doubt no is a great and easy mechanism for getting the proxy class etc.. al
nice and quickly added to the project.

However, say in my project I have two forms, and both use the Web reference.
Instantiating an instance of the web service in each form, and using when
needed, and disposing when finished, must cause a bit of a performance hit
(especially in pocket pc). So I was thinking, how can one create a Singleton
instance of the web Service and use it throughout the application? Or is
there some other mechanism to achieve a similar result?

Thanks for any opinions.
Dav

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davebythesea - 21 Dec 2007 17:00 GMT

Hi folks,

I was thinking something maybe like this -

class SingletonService
{
    private static SingletonService instance;
    private static object padlock = new object();

    private Mobile.Service.Service webService = new Mobile.Service.Service();

    protected SingletonService()
    {
    }

    public bool fLogin(string username, string password)
    {
        return webService.fLogin(username, password);
    }

    public static SingletonService Instance
    {
        get
        {
            lock (padlock)
            {
                if (instance == null)
                {
                    instance = new SingletonService();
                }
                return instance;
            }
        }
    }
}

Any views?

Best,
Dave

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John Saunders [MVP] - 23 Dec 2007 18:18 GMT

> Hi folks,
>
[quoted text clipped - 14 lines]
> instance of the web Service and use it throughout the application? Or is
> there some other mechanism to achieve a similar result?

In general, I think it would be best to not solve performance problems
before they exist - you might be solving the wrong problem.

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--------------------------------------------------------------------------------
John Saunders | MVP - Windows Server System - Connected System Developer

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Singleton instance of web service?

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