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//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.ServiceModel.Dispatcher
{
using System.ServiceModel;
using System.ServiceModel.Channels;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Diagnostics;
using System.ServiceModel.Diagnostics;
using System.Threading;
class EndpointDispatcherTable
{
MessageFilterTable<EndpointDispatcher> filters;
object thisLock;
const int optimizationThreshold = 2;
List<EndpointDispatcher> cachedEndpoints;
public EndpointDispatcherTable(object thisLock)
{
this.thisLock = thisLock;
}
public int Count
{
get
{
return ((this.cachedEndpoints != null) ? cachedEndpoints.Count : 0) +
((this.filters != null) ? this.filters.Count : 0);
}
}
object ThisLock
{
get { return thisLock; }
}
public void AddEndpoint(EndpointDispatcher endpoint)
{
lock (ThisLock)
{
MessageFilter filter = endpoint.EndpointFilter;
int priority = endpoint.FilterPriority;
if (filters == null)
{
if (this.cachedEndpoints == null)
{
this.cachedEndpoints = new List<EndpointDispatcher>(optimizationThreshold);
}
if (this.cachedEndpoints.Count < optimizationThreshold)
{
this.cachedEndpoints.Add(endpoint);
}
else
{
filters = new MessageFilterTable<EndpointDispatcher>();
for (int i = 0; i < this.cachedEndpoints.Count; i++)
{
int cachedPriority = cachedEndpoints[i].FilterPriority;
MessageFilter cachedFilter = cachedEndpoints[i].EndpointFilter;
filters.Add(cachedFilter, cachedEndpoints[i], cachedPriority);
}
filters.Add(filter, endpoint, priority);
this.cachedEndpoints = null;
}
}
else
{
filters.Add(filter, endpoint, priority);
}
}
}
public void RemoveEndpoint(EndpointDispatcher endpoint)
{
lock (ThisLock)
{
if (filters == null)
{
if (cachedEndpoints != null && cachedEndpoints.Contains(endpoint))
{
cachedEndpoints.Remove(endpoint);
}
}
else
{
MessageFilter filter = endpoint.EndpointFilter;
filters.Remove(filter);
}
}
}
EndpointDispatcher LookupInCache(Message message, out bool addressMatched)
{
EndpointDispatcher result = null;
int priority = int.MinValue;
bool duplicatePriority = false;
addressMatched = false;
if (this.cachedEndpoints != null && this.cachedEndpoints.Count > 0)
{
for (int i = 0; i < this.cachedEndpoints.Count; i++)
{
EndpointDispatcher cachedEndpoint = cachedEndpoints[i];
int cachedPriority = cachedEndpoint.FilterPriority;
MessageFilter cachedFilter = cachedEndpoint.EndpointFilter;
bool matchResult;
AndMessageFilter andFilter = cachedFilter as AndMessageFilter;
if (andFilter != null)
{
bool addressResult;
matchResult = andFilter.Match(message, out addressResult);
addressMatched |= addressResult;
}
else
{
matchResult = cachedFilter.Match(message);
}
if (matchResult)
{
addressMatched = true;
if (cachedPriority > priority || result == null)
{
result = cachedEndpoint;
priority = cachedPriority;
duplicatePriority = false;
}
else if (cachedPriority == priority && result != null)
{
duplicatePriority = true;
}
}
}
}
if (duplicatePriority)
{
throw TraceUtility.ThrowHelperError(new MultipleFilterMatchesException(SR.GetString(SR.FilterMultipleMatches)), message);
}
return result;
}
public EndpointDispatcher Lookup(Message message, out bool addressMatched)
{
EndpointDispatcher data = null;
data = LookupInCache(message, out addressMatched);
if (data == null)
{
lock (ThisLock)
{
data = LookupInCache(message, out addressMatched);
if (data == null && filters != null)
{
filters.GetMatchingValue(message, out data, out addressMatched);
}
}
}
return data;
}
}
}
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