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//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.ServiceModel.Description
{
using System.Collections.Generic;
using System.ServiceModel.Channels;
using System.ServiceModel.Dispatcher;
using System.ServiceModel;
using System.Xml;
using System.Runtime.Serialization;
using System.Collections.ObjectModel;
public class ServiceThrottlingBehavior : IServiceBehavior
{
//For V1: Default MaxConcurrentInstances should not enforce any throttle
//But still it should not be set to Int32.MAX;
//So compute default MaxInstances to be large enough to support MaxCalls & MaxSessions.
internal static int DefaultMaxConcurrentInstances = ServiceThrottle.DefaultMaxConcurrentCallsCpuCount + ServiceThrottle.DefaultMaxConcurrentSessionsCpuCount;
int calls = ServiceThrottle.DefaultMaxConcurrentCallsCpuCount;
int sessions = ServiceThrottle.DefaultMaxConcurrentSessionsCpuCount;
int instances = Int32.MaxValue;
bool maxInstanceSetExplicitly;
public int MaxConcurrentCalls
{
get { return this.calls; }
set
{
if (value <= 0)
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(SR.SFxThrottleLimitMustBeGreaterThanZero0)));
this.calls = value;
}
}
public int MaxConcurrentSessions
{
get { return this.sessions; }
set
{
if (value <= 0)
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(SR.SFxThrottleLimitMustBeGreaterThanZero0)));
this.sessions = value;
}
}
public int MaxConcurrentInstances
{
get
{
if (this.maxInstanceSetExplicitly)
{
return this.instances;
}
else
{
//For V1: Default MaxConcurrentInstances should not enforce any throttle
//But still it should not be set to Int32.MAX;
//So compute default MaxInstances to be large enough to support MaxCalls & MaxSessions.
this.instances = this.calls + this.sessions;
if (this.instances < 0)
{
this.instances = Int32.MaxValue;
}
}
return this.instances;
}
set
{
if (value <= 0)
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(SR.SFxThrottleLimitMustBeGreaterThanZero0)));
this.instances = value;
this.maxInstanceSetExplicitly = true;
}
}
void IServiceBehavior.Validate(ServiceDescription description, ServiceHostBase serviceHostBase)
{
}
void IServiceBehavior.AddBindingParameters(ServiceDescription description, ServiceHostBase serviceHostBase, Collection<ServiceEndpoint> endpoints, BindingParameterCollection parameters)
{
}
void IServiceBehavior.ApplyDispatchBehavior(ServiceDescription description, ServiceHostBase serviceHostBase)
{
if (serviceHostBase == null)
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentNullException("serviceHostBase"));
ServiceThrottle serviceThrottle = serviceHostBase.ServiceThrottle;
serviceThrottle.MaxConcurrentCalls = this.calls;
serviceThrottle.MaxConcurrentSessions = this.sessions;
serviceThrottle.MaxConcurrentInstances = this.MaxConcurrentInstances;
for (int i = 0; i < serviceHostBase.ChannelDispatchers.Count; i++)
{
ChannelDispatcher channelDispatcher = serviceHostBase.ChannelDispatchers[i] as ChannelDispatcher;
if (channelDispatcher != null)
{
channelDispatcher.ServiceThrottle = serviceThrottle;
}
}
}
}
}
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