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//-----------------------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//-----------------------------------------------------------------------------
namespace System.ServiceModel.Activities
{
using System.Activities;
using System.Activities.Expressions;
using System.Activities.Statements;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Net.Security;
using System.Runtime;
using System.Security.Principal;
using System.ServiceModel.Channels;
using System.ServiceModel.Description;
using System.ServiceModel.Dispatcher;
using System.ServiceModel.XamlIntegration;
using System.Windows.Markup;
using System.Xml.Linq;
[ContentProperty("Content")]
public sealed class Send : Activity
{
ToRequest requestFormatter;
InternalSendMessage internalSend;
Collection<Type> knownTypes;
Collection<CorrelationInitializer> correlationInitializers;
bool isOneWay;
IClientMessageFormatter lazyFormatter;
IList<CorrelationQuery> lazyCorrelationQueries;
bool? channelCacheEnabled;
public Send()
{
this.isOneWay = true; // ReceiveReply if defined by user, will set this to false
this.TokenImpersonationLevel = TokenImpersonationLevel.Identification;
base.Implementation = () =>
{
// if CacheMetadata isn't called, bail early
if (this.internalSend == null)
{
return null;
}
if (this.requestFormatter == null)
{
return this.internalSend;
}
else
{
Variable<Message> request = new Variable<Message> { Name = "RequestMessage" };
this.requestFormatter.Message = new OutArgument<Message>(request);
this.requestFormatter.Send = this;
this.internalSend.Message = new InArgument<Message>(request);
this.internalSend.MessageOut = new OutArgument<Message>(request);
return new MessagingNoPersistScope
{
Body = new Sequence
{
Variables = { request },
Activities =
{
this.requestFormatter,
this.internalSend,
}
}
};
}
};
}
// the content to send (either message or parameters-based) declared by the user
[DefaultValue(null)]
public SendContent Content
{
get;
set;
}
// Internally, we should always use InternalContent since this property may have default content that we added
internal SendContent InternalContent
{
get
{
return this.Content ?? SendContent.DefaultSendContent;
}
}
// Additional correlations allow situations where a "session" involves multiple
// messages between two workflow instances.
public Collection<CorrelationInitializer> CorrelationInitializers
{
get
{
if (this.correlationInitializers == null)
{
this.correlationInitializers = new Collection<CorrelationInitializer>();
}
return this.correlationInitializers;
}
}
// Allows the action for the message to be specified by the user/designer.
// If not set, the value is constructed from the Name of the activity.
// If specified on the Send side of a message, the Receive side needs to have the same value in order
// for the message to be delivered correctly.
[DefaultValue(null)]
public string Action
{
get;
set;
}
[DefaultValue(null)]
public InArgument<CorrelationHandle> CorrelatesWith
{
get;
set;
}
// Specifies the endpoint of the service we are sending to. If not specified, it must come
// from the configuration file.
[DefaultValue(null)]
public Endpoint Endpoint
{
get;
set;
}
// This is used to load the client Endpoint from configuration. This should be mutually exclusive
// with the Endpoint property.
// optional defaults to ServiceContractName.LocalName
[DefaultValue(null)]
public string EndpointConfigurationName
{
get;
set;
}
// Allows the address portion of the endpoint to be overridden at runtime by the
// workflow instance.
[DefaultValue(null)]
public InArgument<Uri> EndpointAddress
{
get;
set;
}
// Do we need this?
public Collection<Type> KnownTypes
{
get
{
if (this.knownTypes == null)
{
this.knownTypes = new Collection<Type>();
}
return this.knownTypes;
}
}
// this will be used to construct the default value for Action if the Action property is
// not specifically set.
// There is validation to make sure either this or Action has a value.
[DefaultValue(null)]
public string OperationName
{
get;
set;
}
// The protection level for the message.
// If ValueType or Value.Expression.Type is MessageContract, the MessageContract definition may have additional settings.
// Default if this is not specified is Sign.
[DefaultValue(null)]
public ProtectionLevel? ProtectionLevel
{
get;
set;
}
// Maybe an enum to limit possibilities
// I am still a little fuzzy on this property.
[DefaultValue(SerializerOption.DataContractSerializer)]
public SerializerOption SerializerOption
{
get;
set;
}
// The service contract name. This allows the same workflow instance to implement multiple
// servce "contracts". If not specified and this is the first Receive* activity in the
// workflow, contract inference uses this activity's Name as the service contract name.
[DefaultValue(null)]
[TypeConverter(typeof(ServiceXNameTypeConverter))]
public XName ServiceContractName
{
get;
set;
}
// The token impersonation level that is allowed for the receiver of the message.
[DefaultValue(TokenImpersonationLevel.Identification)]
public TokenImpersonationLevel TokenImpersonationLevel
{
get;
set;
}
internal bool ChannelCacheEnabled
{
get
{
Fx.Assert(this.channelCacheEnabled.HasValue, "The value of channelCacheEnabled must be initialized!");
return this.channelCacheEnabled.Value;
}
}
internal bool OperationUsesMessageContract
{
get;
set;
}
internal OperationDescription OperationDescription
{
get;
set;
}
protected override void CacheMetadata(ActivityMetadata metadata)
{
if (string.IsNullOrEmpty(this.OperationName))
{
metadata.AddValidationError(SR.MissingOperationName(this.DisplayName));
}
if (this.ServiceContractName == null)
{
string errorOperationName = ContractValidationHelper.GetErrorMessageOperationName(this.OperationName);
metadata.AddValidationError(SR.MissingServiceContractName(this.DisplayName, errorOperationName));
}
if (this.Endpoint == null)
{
if (string.IsNullOrEmpty(this.EndpointConfigurationName))
{
metadata.AddValidationError(SR.EndpointNotSet(this.DisplayName, this.OperationName));
}
}
else
{
if (!string.IsNullOrEmpty(this.EndpointConfigurationName))
{
metadata.AddValidationError(SR.EndpointIncorrectlySet(this.DisplayName, this.OperationName));
}
if (this.Endpoint.Binding == null)
{
metadata.AddValidationError(SR.MissingBindingInEndpoint(this.Endpoint.Name, this.ServiceContractName));
}
}
// validate Correlation Initializers
MessagingActivityHelper.ValidateCorrelationInitializer(metadata, this.correlationInitializers, false, this.DisplayName, this.OperationName);
// Add runtime arguments
MessagingActivityHelper.AddRuntimeArgument(this.CorrelatesWith, "CorrelatesWith", Constants.CorrelationHandleType, ArgumentDirection.In, metadata);
MessagingActivityHelper.AddRuntimeArgument(this.EndpointAddress, "EndpointAddress", Constants.UriType, ArgumentDirection.In, metadata);
// Validate Content
this.InternalContent.CacheMetadata(metadata, this, this.OperationName);
if (this.correlationInitializers != null)
{
for (int i = 0; i < this.correlationInitializers.Count; i++)
{
CorrelationInitializer initializer = this.correlationInitializers[i];
initializer.ArgumentName = Constants.Parameter + i;
RuntimeArgument initializerArgument = new RuntimeArgument(initializer.ArgumentName, Constants.CorrelationHandleType, ArgumentDirection.In);
metadata.Bind(initializer.CorrelationHandle, initializerArgument);
metadata.AddArgument(initializerArgument);
}
}
if (!metadata.HasViolations)
{
if (this.InternalContent is SendMessageContent
&& MessageBuilder.IsMessageContract(((SendMessageContent)this.InternalContent).InternalDeclaredMessageType))
{
this.OperationUsesMessageContract = true;
}
this.internalSend = CreateInternalSend();
this.InternalContent.ConfigureInternalSend(this.internalSend, out this.requestFormatter);
if (this.requestFormatter != null && this.lazyFormatter != null)
{
this.requestFormatter.Formatter = this.lazyFormatter;
}
}
else
{
this.internalSend = null;
this.requestFormatter = null;
}
}
InternalSendMessage CreateInternalSend()
{
InternalSendMessage result = new InternalSendMessage
{
OwnerDisplayName = this.DisplayName,
OperationName = this.OperationName,
CorrelatesWith = new InArgument<CorrelationHandle>(new ArgumentValue<CorrelationHandle> { ArgumentName = "CorrelatesWith" }),
Endpoint = this.Endpoint,
EndpointConfigurationName = this.EndpointConfigurationName,
IsOneWay = this.isOneWay,
IsSendReply = false,
TokenImpersonationLevel = this.TokenImpersonationLevel,
ServiceContractName = this.ServiceContractName,
Action = this.Action,
Parent = this
};
if (this.correlationInitializers != null)
{
foreach (CorrelationInitializer correlation in this.correlationInitializers)
{
result.CorrelationInitializers.Add(correlation.Clone());
}
Collection<CorrelationQuery> internalCorrelationQueryCollection = ContractInferenceHelper.CreateClientCorrelationQueries(null, this.correlationInitializers,
this.Action, this.ServiceContractName, this.OperationName, false);
Fx.Assert(internalCorrelationQueryCollection.Count <= 1, "Querycollection for send cannot have more than one correlation query");
if (internalCorrelationQueryCollection.Count == 1)
{
result.CorrelationQuery = internalCorrelationQueryCollection[0];
}
}
if (this.EndpointAddress != null)
{
result.EndpointAddress = new InArgument<Uri>(context => ((InArgument<Uri>)this.EndpointAddress).Get(context));
}
if (this.lazyCorrelationQueries != null)
{
foreach (CorrelationQuery correlationQuery in this.lazyCorrelationQueries)
{
result.ReplyCorrelationQueries.Add(correlationQuery);
}
}
return result;
}
// Acccessed by ReceiveReply.CreateBody to set OneWay to false
internal void SetIsOneWay(bool value)
{
this.isOneWay = value;
if (this.internalSend != null)
{
this.internalSend.IsOneWay = this.isOneWay;
}
}
internal MessageVersion GetMessageVersion()
{
return this.internalSend.GetMessageVersion();
}
internal void SetFormatter(IClientMessageFormatter formatter)
{
if (this.requestFormatter != null)
{
this.requestFormatter.Formatter = formatter;
}
else
{
// we save the formatter and set the requestFormatter.Formatter later
this.lazyFormatter = formatter;
}
}
internal void SetReplyCorrelationQuery(CorrelationQuery replyQuery)
{
Fx.Assert(replyQuery != null, "replyQuery cannot be null!");
if (this.internalSend != null && !this.internalSend.ReplyCorrelationQueries.Contains(replyQuery))
{
this.internalSend.ReplyCorrelationQueries.Add(replyQuery);
}
else
{
// we save the CorrelationQuery and add it to InternalSendMessage later
if (this.lazyCorrelationQueries == null)
{
this.lazyCorrelationQueries = new List<CorrelationQuery>();
}
this.lazyCorrelationQueries.Add(replyQuery);
}
}
internal void InitializeChannelCacheEnabledSetting(ActivityContext context)
{
if (!this.channelCacheEnabled.HasValue)
{
SendMessageChannelCache channelCacheExtension = context.GetExtension<SendMessageChannelCache>();
Fx.Assert(channelCacheExtension != null, "channelCacheExtension must exist!");
InitializeChannelCacheEnabledSetting(channelCacheExtension);
}
}
internal void InitializeChannelCacheEnabledSetting(SendMessageChannelCache channelCacheExtension)
{
Fx.Assert(channelCacheExtension != null, "channelCacheExtension cannot be null!");
ChannelCacheSettings factorySettings = channelCacheExtension.FactorySettings;
Fx.Assert(factorySettings != null, "FactorySettings cannot be null!");
bool enabled;
if (factorySettings.IdleTimeout == TimeSpan.Zero || factorySettings.LeaseTimeout == TimeSpan.Zero || factorySettings.MaxItemsInCache == 0)
{
enabled = false;
}
else
{
enabled = true;
}
if (!this.channelCacheEnabled.HasValue)
{
this.channelCacheEnabled = enabled;
}
else
{
Fx.Assert(this.channelCacheEnabled.Value == enabled, "Once ChannelCacheEnabled is set, it cannot be changed!");
}
}
}
}
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