/// <summary>
/// Unregisters a previous registration with the <see cref="ServiceBusService"/> to produce or consume <see cref="Message"/>s
/// </summary>
/// <param name="request">The <see cref="RegistrationRequest"/> used when registering.</param>
public virtual void Unregister(RegistrationRequest request)
{
// Retrieve registration information.
RegistrationInfo registration;
if (request.MessageType == MessageType.Queue)
{
// Queue
m_queuesLock.EnterReadLock();
try
{
m_queues.TryGetValue(request.MessageName, out registration);
}
finally
{
m_queuesLock.ExitReadLock();
}
}
else if (request.MessageType == MessageType.Topic)
{
// Topic
m_topicsLock.EnterReadLock();
try
{
m_topics.TryGetValue(request.MessageName, out registration);
}
finally
{
m_topicsLock.ExitReadLock();
}
}
else
{
// Unsupported
throw new NotSupportedException(string.Format("Message type '{0}' is not supported by this operation", request.MessageType));
}
// Update registration information.
if (registration != null)
{
List<ClientInfo> clients = (request.RegistrationType == RegistrationType.Produce ? registration.Producers : registration.Consumers);
lock (clients)
{
clients.RemoveAt(clients.FindIndex(client => client.SessionId == OperationContext.Current.SessionId));
}
}
}
/// <summary>
/// Gets the latest <see cref="Message"/> distributed to the subscribers of the specified <paramref name="topic"/>.
/// </summary>
/// <param name="topic">The topic <see cref="RegistrationRequest"/> used when registering.</param>
/// <returns>The latest <see cref="Message"/> distributed to the <paramref name="topic"/> subscribers.</returns>
public virtual Message GetLatestMessage(RegistrationRequest topic)
{
// Retrieve registration information.
RegistrationInfo registration;
m_topicsLock.EnterReadLock();
try
{
m_topics.TryGetValue(topic.MessageName, out registration);
}
finally
{
m_topicsLock.ExitReadLock();
}
// Retrieve the latest message.
if (registration != null)
{
lock (registration.Consumers)
{
if (registration.Consumers.Exists(consumer => consumer.SessionId == OperationContext.Current.SessionId))
// Requestor has subscribed to the topic.
return registration.LatestMessage;
else
// Requestor didn't subscribe to the topic.
return null;
}
}
else
{
return null;
}
}
/// <summary>
/// Registers with the <see cref="ServiceBusService"/> to produce or consume <see cref="Message"/>s.
/// </summary>
/// <param name="request">An <see cref="RegistrationRequest"/> containing registration data.</param>
public virtual void Register(RegistrationRequest request)
{
// Initialize if uninitialized.
Initialize();
// Save client information if not already present.
ClientInfo client;
m_clientsLock.EnterUpgradeableReadLock();
try
{
if (!m_clients.TryGetValue(OperationContext.Current.SessionId, out client))
{
m_clientsLock.EnterWriteLock();
try
{
client = new ClientInfo(OperationContext.Current);
m_clients.Add(client.SessionId, client);
client.OperationContext.Channel.Faulted += OnChannelFaulted;
client.OperationContext.Channel.Closing += OnChannelClosing;
}
finally
{
m_clientsLock.ExitWriteLock();
}
}
}
finally
{
m_clientsLock.ExitUpgradeableReadLock();
}
// Retrieve registration information.
RegistrationInfo registration;
if (request.MessageType == MessageType.Queue)
{
// Queue
m_queuesLock.EnterUpgradeableReadLock();
try
{
if (!m_queues.TryGetValue(request.MessageName, out registration))
{
m_queuesLock.EnterWriteLock();
try
{
registration = new RegistrationInfo(request);
m_queues.Add(request.MessageName, registration);
}
finally
{
m_queuesLock.ExitWriteLock();
}
}
}
finally
{
m_queuesLock.ExitUpgradeableReadLock();
}
}
else if (request.MessageType == MessageType.Topic)
{
// Topic
m_topicsLock.EnterUpgradeableReadLock();
try
{
if (!m_topics.TryGetValue(request.MessageName, out registration))
{
m_topicsLock.EnterWriteLock();
try
{
registration = new RegistrationInfo(request);
m_topics.Add(request.MessageName, registration);
}
finally
{
m_topicsLock.ExitWriteLock();
}
}
}
finally
{
m_topicsLock.ExitUpgradeableReadLock();
}
}
else
{
// Unsupported
throw new NotSupportedException(string.Format("Message type '{0}' is not supported by this operation", request.MessageType));
}
// Update registration information.
if (registration != null)
{
List<ClientInfo> clients = (request.RegistrationType == RegistrationType.Produce ? registration.Producers : registration.Consumers);
lock (clients)
{
if (!clients.Contains(client))
clients.Add(client);
}
}
}
/// <summary>
/// Initializes a new instance of the <see cref="RegistrationInfo"/> class.
/// </summary>
/// <param name="request">An <see cref="RegistrationRequest"/> object.</param>
internal RegistrationInfo(RegistrationRequest request)
{
MessageType = request.MessageType;
MessageName = request.MessageName;
Producers = new List<ClientInfo>();
Consumers = new List<ClientInfo>();
ProducersLock = new ReaderWriterLockSlim();
ConsumersLock = new ReaderWriterLockSlim();
}
