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#region Using directives
using System;
using System.Diagnostics;
using System.Collections.Generic;
using System.Collections;
using System.Reflection;
using System.Runtime.Serialization;
using System.Workflow.ComponentModel;
using System.Workflow.Runtime;
using System.Workflow.Runtime.Hosting;
using System.Runtime.Remoting.Messaging;
#endregion
namespace System.Workflow.Activities
{
[Serializable]
internal sealed class FollowerQueueCreator : IActivityEventListener<QueueEventArgs>
{
string followerOperation;
object sync = new object();
internal FollowerQueueCreator(string operation)
{
this.followerOperation = operation;
}
public override bool Equals(object obj)
{
if (obj == null)
return false;
FollowerQueueCreator equalsObject = obj as FollowerQueueCreator;
if (this.followerOperation == equalsObject.followerOperation)
return true;
return false;
}
public override int GetHashCode()
{
return this.followerOperation.GetHashCode();
}
#region IActivityEventListener<QueueEventArgs> Members
void IActivityEventListener<QueueEventArgs>.OnEvent(object sender, QueueEventArgs args)
{
lock (sync)
{
WorkflowQueue queue = (WorkflowQueue)sender;
// create the queue after extracting the correlation values from the message
EventQueueName staticId = (EventQueueName)queue.QueueName;
WorkflowActivityTrace.Activity.TraceEvent(TraceEventType.Information, 0, "FollowerQueueCreator: initialized on operation {0} for follower {1}", staticId.InterfaceType.Name + staticId.MethodName, this.followerOperation);
IMethodMessage message = queue.Peek() as IMethodMessage;
ICollection<CorrelationProperty> corrValues = CorrelationResolver.ResolveCorrelationValues(staticId.InterfaceType, staticId.MethodName, message.Args, false);
EventQueueName queueName = new EventQueueName(staticId.InterfaceType, this.followerOperation, corrValues);
if (!queue.QueuingService.Exists(queueName))
{
WorkflowActivityTrace.Activity.TraceEvent(TraceEventType.Information, 0, "FollowerQueueCreator::CreateQueue creating q {0}", queueName.GetHashCode());
queue.QueuingService.CreateWorkflowQueue(queueName, true);
}
}
}
#endregion
}
}
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