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    <p>This is something I think people aren't really aware of when working with the Windsor container - especially the often <strong><em>surprising</em></strong> behavior that disposable transient components are held onto by the container for the lifetime of the kernel until it's disposed unless you release them yourself - though it is documented - take a look <a href="http://www.castleproject.org/container/documentation/trunk/advanced/releasepolicy.html" rel="noreferrer">here</a> - but to quickly quote:</p> <blockquote> <p>the MicroKernel has a pluggable release policy that can hook up and implement some routing to dispose the components. The MicroKernel comes with three IReleasePolicy implementations:</p> <ul> <li>AllComponentsReleasePolicy: track all components to enforce correct disposal upon the MicroKernel instance disposal</li> <li>LifecycledComponentsReleasePolicy: only track components that have a decommission lifecycle associated</li> <li>NoTrackingReleasePolicy: does not perform any tracking </li> </ul> <p>You can also implement your own release policy by using the interface IReleasePolicy. </p> </blockquote> <p>What you might find easier is to change the policy to a <strong>NoTrackingReleasePolicy</strong> and then handle the disposing yourself - this is potentially risky as well, but if your lifestyles are largely transient (or if when your container is disposed your application is about to close anyway) it's probably not a big deal. Remember however that any components which have already been injected with the singleton will hold a reference, so you could end up causing problems trying to "refresh" your singletons - it seems like a bad practice, and I wonder if perhaps you can avoid having to do this in the first place by improving the way your applications put together.</p> <p>Other approaches are to build a custom lifecycle with it's own decommission implementation (so releasing the singleton would actually dispose of the component, much like the transient lifecycle does).</p> <p>Alternatively another approach is to have a decorator for your service registered in the container with a singleton lifestyle, but your actual underlying service registered in the container with a transient lifestyle - then when you need to refresh the component just dispose of the transient underlying component held by the decorator and replace it with a freshly resolved instance (resolve it using the components key, rather then the service, to avoid getting the decorator) - this avoids issues with other singleton services (which aren't being "refreshed") from holding onto stale services which have been disposed of making them unusable, but does require a bit of casting etc. to make it work.</p>
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    1. COI have a similar problem, i very much like the decorator concept very much. Nice one...
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