MessageQueue.PeekByCorrelationId Método

public:
 System::Messaging::Message ^ PeekByCorrelationId(System::String ^ correlationId);

public System.Messaging.Message PeekByCorrelationId (string correlationId);

member this.PeekByCorrelationId : string -> System.Messaging.Message

Public Function PeekByCorrelationId (correlationId As String) As Message

Parámetros

Devoluciones

Message cuya propiedad CorrelationId coincide con el parámetro correlationId pasado.

Excepciones

Ejemplos

En el ejemplo de código siguiente se envía y recibe un mensaje que contiene un orden hacia y desde una cola. Solicita específicamente una confirmación positiva cuando el mensaje original alcanza o se recupera de la cola.

#using <system.dll>
#using <system.messaging.dll>

using namespace System;
using namespace System::Messaging;
ref class MyNewQueue
{
public:
   static void CreateQueue( String^ queuePath )
   {
      try
      {
         if (  !MessageQueue::Exists( queuePath ) )
         {
            MessageQueue::Create( queuePath );
         }
         else
         {
            Console::WriteLine(  "{0} already exists.", queuePath );
         }
      }
      catch ( MessageQueueException^ e ) 
      {
         Console::WriteLine( e->Message );
      }

   }

   void SendMessage()
   {
      // Connect to a queue on the local computer.
      MessageQueue^ myQueue = gcnew MessageQueue( ".\\myQueue" );

      // Create a new message.
      Message^ myMessage = gcnew Message( "Original Message" );
      myMessage->AdministrationQueue = gcnew MessageQueue( ".\\myAdministrationQueue" );
      myMessage->AcknowledgeType = (AcknowledgeTypes)(AcknowledgeTypes::PositiveReceive | AcknowledgeTypes::PositiveArrival);

      // Send the Order to the queue.
      myQueue->Send( myMessage );
      return;
   }

   String^ ReceiveMessage()
   {
      // Connect to the a queue on the local computer.
      MessageQueue^ myQueue = gcnew MessageQueue( ".\\myQueue" );
      myQueue->MessageReadPropertyFilter->CorrelationId = true;
      array<Type^>^p = gcnew array<Type^>(1);
      p[ 0 ] = String::typeid;
      myQueue->Formatter = gcnew XmlMessageFormatter( p );
      String^ returnString = nullptr;
      try
      {
         // Receive and format the message. 
         Message^ myMessage = myQueue->Receive();

         // Display message information.
         Console::WriteLine( "____________________________________________" );
         Console::WriteLine( "Original message information--" );
         Console::WriteLine( "Body: {0}", myMessage->Body );
         Console::WriteLine( "Id: {0}", myMessage->Id );
         Console::WriteLine( "____________________________________________" );
         returnString = myMessage->Id;
      }
      catch ( MessageQueueException^ ) 
      {
         // Handle Message Queuing exceptions.
      }
      // Handle invalid serialization format.
      catch ( InvalidOperationException^ e ) 
      {
         Console::WriteLine( e->Message );
      }

      // Catch other exceptions as necessary.
      return returnString;
   }

   void ReceiveAcknowledgment( String^ messageId, String^ queuePath )
   {
      bool found = false;
      MessageQueue^ queue = gcnew MessageQueue( queuePath );
      queue->MessageReadPropertyFilter->CorrelationId = true;
      queue->MessageReadPropertyFilter->Acknowledgment = true;
      try
      {
         while ( queue->PeekByCorrelationId( messageId ) != nullptr )
         {
            Message^ myAcknowledgmentMessage = queue->ReceiveByCorrelationId( messageId );

            // Output acknowledgment message information. The correlation Id is identical
            // to the id of the original message.
            Console::WriteLine( "Acknowledgment Message Information--" );
            Console::WriteLine( "Correlation Id: {0}", myAcknowledgmentMessage->CorrelationId );
            Console::WriteLine( "Id: {0}", myAcknowledgmentMessage->Id );
            Console::WriteLine( "Acknowledgment Type: {0}", myAcknowledgmentMessage->Acknowledgment );
            Console::WriteLine( "____________________________________________" );
            found = true;
         }
      }
      catch ( InvalidOperationException^ e ) 
      {
         // This exception would be thrown if there is no (further) acknowledgment message
         // with the specified correlation Id. Only output a message if there are no messages;
         // not if the loop has found at least one.
         if ( found == false )
         {
            Console::WriteLine( e->Message );
         }

         // Handle other causes of invalid operation exception.
      }

   }

};

int main()
{
   // Create a new instance of the class.
   MyNewQueue^ myNewQueue = gcnew MyNewQueue;

   // Create new queues.
   MyNewQueue::CreateQueue( ".\\myQueue" );
   MyNewQueue::CreateQueue( ".\\myAdministrationQueue" );

   // Send messages to a queue.
   myNewQueue->SendMessage();

   // Receive messages from a queue.
   String^ messageId = myNewQueue->ReceiveMessage();

   // Receive acknowledgment message.
   if ( messageId != nullptr )
   {
      myNewQueue->ReceiveAcknowledgment( messageId, ".\\myAdministrationQueue" );
   }

   return 0;
}

using System;
using System.Messaging;

namespace MyProject
{

    /// <summary>
    /// Provides a container class for the example.
    /// </summary>
    public class MyNewQueue
    {

        //**************************************************
        // Provides an entry point into the application.
        //		
        // This example sends and receives a message from
        // a queue.
        //**************************************************

        public static void Main()
        {
            // Create a new instance of the class.
            MyNewQueue myNewQueue = new MyNewQueue();

            // Create new queues.
            CreateQueue(".\\myQueue");
            CreateQueue(".\\myAdministrationQueue");

            // Send messages to a queue.
            myNewQueue.SendMessage();

            // Receive messages from a queue.
            string messageId = myNewQueue.ReceiveMessage();

            // Receive acknowledgment message.
            if(messageId != null)
            {
                myNewQueue.ReceiveAcknowledgment(messageId, ".\\myAdministrationQueue");
            }

            return;
        }

        //**************************************************
        // Creates a new queue.
        //**************************************************

        public static void CreateQueue(string queuePath)
        {
            try	
            {
                if(!MessageQueue.Exists(queuePath))
                {
                    MessageQueue.Create(queuePath);
                }
                else
                {
                    Console.WriteLine(queuePath + " already exists.");
                }
            }
            catch (MessageQueueException e)
            {
                Console.WriteLine(e.Message);
            }
        }

        //**************************************************
        // Sends a string message to a queue.
        //**************************************************
        
        public void SendMessage()
        {

            // Connect to a queue on the local computer.
            MessageQueue myQueue = new MessageQueue(".\\myQueue");

            // Create a new message.
            Message myMessage = new Message("Original Message");

            myMessage.AdministrationQueue = new MessageQueue(".\\myAdministrationQueue");
            myMessage.AcknowledgeType = AcknowledgeTypes.PositiveReceive | AcknowledgeTypes.PositiveArrival;

            // Send the Order to the queue.
            myQueue.Send(myMessage);

            return;
        }

        //**************************************************
        // Receives a message containing an Order.
        //**************************************************
        
        public  string ReceiveMessage()
        {
            // Connect to the a queue on the local computer.
            MessageQueue myQueue = new MessageQueue(".\\myQueue");

            myQueue.MessageReadPropertyFilter.CorrelationId = true;

            // Set the formatter to indicate body contains an Order.
            myQueue.Formatter = new XmlMessageFormatter(new Type[]
                {typeof(string)});

            string returnString = null;
            
            try
            {
                // Receive and format the message.
                Message myMessage =	myQueue.Receive();

                // Display message information.
                Console.WriteLine("____________________________________________");
                Console.WriteLine("Original message information--");
                Console.WriteLine("Body: " +myMessage.Body.ToString());
                Console.WriteLine("Id: " + myMessage.Id.ToString());
                Console.WriteLine("____________________________________________");

                returnString =  myMessage.Id;
            }
            
            catch (MessageQueueException)
            {
                // Handle Message Queuing exceptions.
            }

            // Handle invalid serialization format.
            catch (InvalidOperationException e)
            {
                Console.WriteLine(e.Message);
            }
            
            // Catch other exceptions as necessary.

            return returnString;
        }

        //**************************************************
        // Receives a message containing an Order.
        //**************************************************
        
        public void ReceiveAcknowledgment(string messageId, string queuePath)
        {
            bool found = false;
            MessageQueue queue = new MessageQueue(queuePath);
            queue.MessageReadPropertyFilter.CorrelationId = true;
            queue.MessageReadPropertyFilter.Acknowledgment = true;

            try
            {
                while(queue.PeekByCorrelationId(messageId) != null)
                {
                    Message myAcknowledgmentMessage = queue.ReceiveByCorrelationId(messageId);
            
                    // Output acknowledgment message information. The correlation Id is identical
                    // to the id of the original message.
                    Console.WriteLine("Acknowledgment Message Information--");
                    Console.WriteLine("Correlation Id: " + myAcknowledgmentMessage.CorrelationId.ToString());
                    Console.WriteLine("Id: " + myAcknowledgmentMessage.Id.ToString());
                    Console.WriteLine("Acknowledgment Type: " + myAcknowledgmentMessage.Acknowledgment.ToString());
                    Console.WriteLine("____________________________________________");

                    found = true;
                }
            }
            catch (InvalidOperationException e)
            {
                // This exception would be thrown if there is no (further) acknowledgment message
                // with the specified correlation Id. Only output a message if there are no messages;
                // not if the loop has found at least one.
                if(found == false)
                {	
                    Console.WriteLine(e.Message);
                }

                // Handle other causes of invalid operation exception.
            }
        }
    }
}

Imports System.Messaging


' Provides a container class for the example.

Public Class MyNewQueue
   
   

   ' Provides an entry point into the application.       
   ' This example sends and receives a message from
   ' a queue.
      
   Public Shared Sub Main()
         ' Create a new instance of the class.
         Dim myNewQueue As New MyNewQueue()
         
         ' Create new queues.
         CreateQueue(".\myQueue")
         CreateQueue(".\myAdministrationQueue")
         
         ' Send messages to a queue.
         myNewQueue.SendMessage()
         
         ' Receive messages from a queue.
         Dim messageId As String = myNewQueue.ReceiveMessage()
         
         ' Receive acknowledgment message.
         If Not (messageId Is Nothing) Then
            myNewQueue.ReceiveAcknowledgment(messageId, ".\myAdministrationQueue")
         End If
         
         Return
   End Sub
      
      
      ' Creates a new queue.

   Public Shared Sub CreateQueue(queuePath As String)
         Try
            If Not MessageQueue.Exists(queuePath) Then
               MessageQueue.Create(queuePath)
            Else
               Console.WriteLine((queuePath + " already exists."))
            End If
         Catch e As MessageQueueException
            Console.WriteLine(e.Message)
         End Try
   End Sub
       
      
      
 
      ' Sends a string message to a queue.
 
   Public Sub SendMessage()
         
         ' Connect to a queue on the local computer.
         Dim myQueue As New MessageQueue(".\myQueue")
         
         ' Create a new message.
         Dim myMessage As New Message("Original Message")
         
         myMessage.AdministrationQueue = New MessageQueue(".\myAdministrationQueue")
         myMessage.AcknowledgeType = AcknowledgeTypes.PositiveReceive Or AcknowledgeTypes.PositiveArrival
         
         ' Send the Order to the queue.
         myQueue.Send(myMessage)
         
         Return
   End Sub
      
      
      
 
      ' Receives a message containing an Order.
 
   Public Function ReceiveMessage() As String
         ' Connect to the a queue on the local computer.
         Dim myQueue As New MessageQueue(".\myQueue")
         
         myQueue.MessageReadPropertyFilter.CorrelationId = True
         
         
         ' Set the formatter to indicate body contains an Order.
         myQueue.Formatter = New XmlMessageFormatter(New Type() {GetType(String)})
         
         Dim returnString As String = Nothing
         
         Try
            ' Receive and format the message. 
            Dim myMessage As Message = myQueue.Receive()
            
            
            ' Display message information.
            Console.WriteLine("____________________________________________")
            Console.WriteLine("Original message information--")
            Console.WriteLine(("Body: " + myMessage.Body.ToString()))
            Console.WriteLine(("Id: " + myMessage.Id.ToString()))
            Console.WriteLine("____________________________________________")
            
            returnString = myMessage.Id
         
         
                  
         ' Handle invalid serialization format.
         Catch e As InvalidOperationException
            Console.WriteLine(e.Message)
         End Try
         
         ' Catch other exceptions as necessary.
         Return returnString
   End Function 'ReceiveMessage
      
      
 
      ' Receives a message containing an Order.
 
   Public Sub ReceiveAcknowledgment(messageId As String, queuePath As String)
         Dim found As Boolean = False
         Dim queue As New MessageQueue(queuePath)
         queue.MessageReadPropertyFilter.CorrelationId = True
         queue.MessageReadPropertyFilter.Acknowledgment = True
         
         Try
            While Not (queue.PeekByCorrelationId(messageId) Is Nothing)
               Dim myAcknowledgmentMessage As Message = queue.ReceiveByCorrelationId(messageId)
               
               ' Output acknowledgment message information. The correlation Id is identical
               ' to the id of the original message.
               Console.WriteLine("Acknowledgment Message Information--")
               Console.WriteLine(("Correlation Id: " + myAcknowledgmentMessage.CorrelationId.ToString()))
               Console.WriteLine(("Id: " + myAcknowledgmentMessage.Id.ToString()))
               Console.WriteLine(("Acknowledgment Type: " + myAcknowledgmentMessage.Acknowledgment.ToString()))
               Console.WriteLine("____________________________________________")
               
               found = True
            End While
         Catch e As InvalidOperationException
            ' This exception would be thrown if there is no (further) acknowledgment message
            ' with the specified correlation Id. Only output a message if there are no messages;
            ' not if the loop has found at least one.
            If found = False Then
               Console.WriteLine(e.Message)
            End If
         End Try 
   End Sub
 End Class

Comentarios

Este método busca en la cola a la que hace MessageQueue referencia un mensaje cuya CorrelationId coincidencia coincide con el parámetro especificado correlationId . Si no se encuentra ningún mensaje que coincida con el correlationID parámetro , se produce una excepción.

La CorrelationId propiedad se usa para vincular un mensaje enviado a la cola a los mensajes de respuesta, informe o confirmación asociados.

Otros dos métodos permiten ver mensajes en una cola. El Peek método devuelve el primer mensaje de la cola y el PeekById(String) método se usa para recuperar un mensaje especificando su identificador único.

En la tabla siguiente se muestra si este método está disponible en varios modos de grupo de trabajo.

Consulte también

• CorrelationId
• Peek()
• BeginPeek()

public:
 System::Messaging::Message ^ PeekByCorrelationId(System::String ^ correlationId, TimeSpan timeout);

public System.Messaging.Message PeekByCorrelationId (string correlationId, TimeSpan timeout);

member this.PeekByCorrelationId : string * TimeSpan -> System.Messaging.Message

Public Function PeekByCorrelationId (correlationId As String, timeout As TimeSpan) As Message

Parámetros

Devoluciones

Message cuya propiedad CorrelationId coincide con el parámetro correlationId pasado.

Excepciones

Ejemplos

En el siguiente ejemplo de código se muestra el uso de PeekByCorrelationId(String, TimeSpan).

// Connect to a queue on the local computer.
MessageQueue^ queue = gcnew MessageQueue(".\\exampleQueue");

// Create a new message.
Message^ msg = gcnew Message("Example Message Body");

// Designate a queue to receive the acknowledgement message for this
// message.
msg->AdministrationQueue = 
    gcnew MessageQueue(".\\exampleAdminQueue");

// Set the message to generate an acknowledgement message upon its
// arrival.
msg->AcknowledgeType = AcknowledgeTypes::PositiveArrival;

// Send the message.
queue->Send(msg, "Example Message Label");

// Get the message's Id property value.
String^ id = msg->Id;

// Receive the message from the queue.
msg = queue->ReceiveById(id, TimeSpan::FromSeconds(10.0));

// Connect to the admin queue.
MessageQueue^ adminQueue = 
    gcnew MessageQueue(".\\exampleAdminQueue");

// Set the admin queue's MessageReadPropertyFilter property to ensure
// that the acknowledgement message includes the desired properties.
adminQueue->MessageReadPropertyFilter->Acknowledgment = true;
adminQueue->MessageReadPropertyFilter->CorrelationId = true;

// Peek at the acknowledgement message.
Message^ ackMsg = adminQueue->PeekByCorrelationId(id,
    TimeSpan::FromSeconds(10.0));

// Display the acknowledgement message's property values.
Console::WriteLine("Message.Label: {0}", ackMsg->Label);
Console::WriteLine("Message.Acknowledgment: {0}",
    ackMsg->Acknowledgment);
Console::WriteLine("Message.CorrelationId: {0}", ackMsg->CorrelationId);

adminQueue->Close();
queue->Close();

// Connect to a queue on the local computer.
MessageQueue queue = new MessageQueue(".\\exampleQueue");

// Create a new message.
Message msg = new Message("Example Message Body");

// Designate a queue to receive the acknowledgement message for this
// message.
msg.AdministrationQueue = new MessageQueue(".\\exampleAdminQueue");

// Set the message to generate an acknowledgement message upon its
// arrival.
msg.AcknowledgeType = AcknowledgeTypes.PositiveArrival;

// Send the message.
queue.Send(msg, "Example Message Label");

// Get the message's Id property value.
string id = msg.Id;

// Receive the message from the queue.
msg = queue.ReceiveById(id, TimeSpan.FromSeconds(10.0));

// Connect to the admin queue.
MessageQueue adminQueue = new MessageQueue(".\\exampleAdminQueue");

// Set the admin queue's MessageReadPropertyFilter property to ensure
// that the acknowledgement message includes the desired properties.
adminQueue.MessageReadPropertyFilter.Acknowledgment = true;
adminQueue.MessageReadPropertyFilter.CorrelationId = true;

// Peek at the acknowledgement message.
Message ackMsg = adminQueue.PeekByCorrelationId(id,
    TimeSpan.FromSeconds(10.0));

// Display the acknowledgement message's property values.
Console.WriteLine("Message.Label: {0}", ackMsg.Label);
Console.WriteLine("Message.Acknowledgment: {0}", ackMsg.Acknowledgment);
Console.WriteLine("Message.CorrelationId: {0}", ackMsg.CorrelationId);

Comentarios

Este método busca en la cola a la que hace MessageQueue referencia un mensaje cuya CorrelationId coincidencia coincide con el parámetro especificado correlationId . Si no se encuentra ningún mensaje que coincida con el correlationID parámetro y no llega ningún mensaje nuevo en la cola dentro del período especificado por el timeout parámetro , se produce una excepción.

El timeout parámetro no especifica el tiempo de ejecución total para este método. En su lugar, especifica el tiempo de espera para que llegue un nuevo mensaje a la cola. Cada vez que llega un nuevo mensaje, este método examina el CorrelationId del nuevo mensaje para ver si coincide con el correlationId parámetro . Si no es así, este método inicia el período de tiempo de espera y espera a que llegue otro mensaje nuevo. Por lo tanto, si los nuevos mensajes continúan llegando dentro del período de tiempo de espera, es posible que este método siga ejecutándose indefinidamente, ya sea hasta que expire el período de tiempo de espera sin que lleguen mensajes nuevos o hasta que llegue un mensaje cuyo CorrelationId parámetro coincida correlationId .

La CorrelationId propiedad se usa para vincular un mensaje enviado a la cola a los mensajes de respuesta, informe o confirmación asociados.

Otros dos métodos permiten ver mensajes en una cola. El Peek método devuelve el primer mensaje de la cola y el PeekById(String) método se usa para recuperar un mensaje especificando su identificador único.

En la tabla siguiente se muestra si este método está disponible en varios modos de grupo de trabajo.

Consulte también

• InfiniteTimeout
• CorrelationId
• Peek()
• BeginPeek()