Hello,
I am using a third party product for which I have written a plugin. My
plugin is executed using COM, so I have something like this (very simple
example):
[Guid("my-guid")]
[ClassInterface(ClassInterfaceType.None)]
[ProgId("myProgId")]
[ComVisible(true)]
public class MyPlugin : ICustomActivity
{
private readonly IMyWcfService service;
public MyPlugin()
{
service = Container.Resolve<IMyWcfService>();
}
public string Execute(string xml) // This is the ICustomActivity
implementation
{
string response = service.DoSomething();
return message;
}
}
"Container" is a very simple wrapper around WindsorContainer. I am using the
WCF Integration facility so the "service" object is a WCF service
proxy/client. I have marked the object as transient, for example:
<castle>
<components>
<component
id="IMyWcfService"
type="Company.Product.IMyWcfService, Company.Product"
wcfEndpointConfiguration="MyWcfServiceClientEndpointConfig"
lifestyle="transient" />
</components>
</castle>
My problem is that the "service" client is not being closed. If I run my
application under load, I hit the maximum 10 open connections and then start
to get errors for subsequent connections. I am unwilling to configure an
increase in the number of allowed connections because this would be hiding
the underlying problem.
I have used Castle's WCF Integration on a lot of projects before and I have
not experienced this problem, though this is the first time COM has ben
thrown into the mix.
Obviously, I have no hook to IDisposable. IMyWcfService does not implement
IDisposable (and imy understanding is that you should never do that). Also,
I cannot cast the proxy to IDisposable as a work around.
Can anyone shed any light on what the problem might be? Is this something to
do with the fact that the plugin is called via COM and is not disposed of
correctly? How can I ensure the client is closed and disposed properly (and
in a timely manner)?
Any help or pointers greatly appreciated.
Thanks,
Callum
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