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//-----------------------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//-----------------------------------------------------------------------------
namespace System.ServiceModel.Dispatcher
{
using System.Runtime;
using System.ServiceModel;
using System.ServiceModel.Channels;
class PerSessionInstanceContextProvider : InstanceContextProviderBase
{
internal PerSessionInstanceContextProvider(DispatchRuntime dispatchRuntime)
: base(dispatchRuntime)
{
}
public override InstanceContext GetExistingInstanceContext(Message message, IContextChannel channel)
{
// Here is the flow for a Sessionful channel
// 1. First request comes in on new channel.
// 2. ServiceChannel.InstanceContext is returned which is null.
// 3. InstanceBehavior.EnsureInstanceContext will create a new InstanceContext.
// 4. this.InitializeInstanceContext is called with the newly created InstanceContext and the channel.
// 5. If the channel is sessionful then its bound to the InstanceContext.
// 6. Bind channel to the InstanceContext.
// 7. For all further requests on the same channel, we will return ServiceChannel.InstanceContext which will be non null.
ServiceChannel serviceChannel = this.GetServiceChannelFromProxy(channel);
Fx.Assert((serviceChannel != null), "System.ServiceModel.Dispatcher.PerSessionInstanceContextProvider.GetExistingInstanceContext(), serviceChannel != null");
return (serviceChannel != null) ? serviceChannel.InstanceContext : null;
}
public override void InitializeInstanceContext(InstanceContext instanceContext, Message message, IContextChannel channel)
{
ServiceChannel serviceChannel = GetServiceChannelFromProxy(channel);
if (serviceChannel != null && serviceChannel.HasSession)
{
instanceContext.BindIncomingChannel(serviceChannel);
}
}
public override bool IsIdle(InstanceContext instanceContext)
{
//By default return true
return true;
}
public override void NotifyIdle(InstanceContextIdleCallback callback, InstanceContext instanceContext)
{
//no-op
}
}
}
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