Acknowledgment 列挙体
アセンブリ: System.Messaging (system.messaging.dll 内)
構文
Acknowledgment クラスは、メッセージ キューによって管理キューにポストされる受信確認メッセージのタイプと、受信確認メッセージ送信の原因となる条件を定義します。受信確認のタイプは 4 つのグループに大別できます。肯定到達受信確認、肯定読み取り受信確認、否定到達受信確認、および否定読み取り受信確認です。
メッセージに関連付ける管理キューは Message.AdministrationQueue プロパティで指定します。
メッセージ キューは、受信確認メッセージを作成するときに Message.Acknowledgment プロパティを Acknowledgment 列挙値の 1 つに設定します。Message.Acknowledgment プロパティ値は、通常、システムが送信した受信確認メッセージがインスタンスによって参照されているときだけ意味を持ちます。受信確認メッセージ以外のメッセージの Message.Acknowledgment プロパティを読み取ると例外がスローされます。
メッセージ キューは、送信元アプリケーションが要求した場合を除いて、受信確認メッセージを送信しません。アプリケーションは Message.AcknowledgeType プロパティに適切な値を設定することによりこの要求を行います。メッセージ キューは、元の Message の AdministrationQueue プロパティで指定された管理キューにすべての受信確認メッセージを送信します。
オーダーを含んでいるメッセージをキューに送信し、またオーダーを含んでいるメッセージをキューから受信するコード例を次に示します。これは特に、元のメッセージがキューに到着するか、元のメッセージがキューから取得されたときに、肯定受信確認を要求します。
Imports System 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 'Main ' 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 'CreateQueue ' 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 'SendMessage ' 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 'ReceiveAcknowledgment ' Handle other causes of invalid operation exception. End Class 'MyNewQueue
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. } } } }
#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; }
package MyProject; import System.*; import System.Messaging.*; /// <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(String[] args) { // 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; } //main //************************************************** // 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.get_Message()); } } //CreateQueue //************************************************** // 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.set_AdministrationQueue( new MessageQueue(".\\myAdministrationQueue")); myMessage.set_AcknowledgeType(AcknowledgeTypes.PositiveReceive | AcknowledgeTypes.PositiveArrival); // Send the Order to the queue. myQueue.Send(myMessage); return; } //SendMessage //************************************************** // Receives a message containing an Order. //************************************************** public String ReceiveMessage() { // Connect to the a queue on the local computer. MessageQueue myQueue = new MessageQueue(".\\myQueue"); myQueue.get_MessageReadPropertyFilter().set_CorrelationId(true); // Set the formatter to indicate body contains an Order. myQueue.set_Formatter(new XmlMessageFormatter( new Type[] { String.class.ToType() })); 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.get_Body().ToString()); Console.WriteLine("Id: " + myMessage.get_Id().ToString()); Console.WriteLine("____________________________________________"); returnString = myMessage.get_Id(); } catch (MessageQueueException exp) { // Handle Message Queuing exceptions. } // Handle invalid serialization format. catch (InvalidOperationException e) { Console.WriteLine(e.get_Message()); } // Catch other exceptions as necessary. return returnString; } //ReceiveMessage //************************************************** // Receives a message containing an Order. //************************************************** public void ReceiveAcknowledgment(String messageId, String queuePath) { boolean found = false; MessageQueue queue = new MessageQueue(queuePath); queue.get_MessageReadPropertyFilter().set_CorrelationId(true); queue.get_MessageReadPropertyFilter().set_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.get_CorrelationId().ToString()); Console.WriteLine("Id: " + myAcknowledgmentMessage.get_Id().ToString()); Console.WriteLine("Acknowledgment Type: " + myAcknowledgmentMessage.get_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.get_Message()); } // Handle other causes of invalid operation exception. } } //ReceiveAcknowledgment } //MyNewQueue
Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
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参照
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