使用ODP.net出队后Oracle Advanced Queue的消息状态未更新

如何解决使用ODP.net出队后Oracle Advanced Queue的消息状态未更新

我正在尝试通过ODP.NET通过服务从oracle AQ中出消息

一旦服务使消息出队，该记录就不能用于其他服务实例，这意味着它应该被锁定，直到事务提交或事务到期为止

我的问题是我能够成功地使记录出队，但是消息状态没有从就绪状态更新为任何其他状态，我也能够获得有效载荷数据

 Public Shared Sub DequeueMessage(ByVal MessageID As String)
        Dim constr As String = "mystring"
        Dim con As Oracle.DataAccess.Client.OracleConnection = New Oracle.DataAccess.Client.OracleConnection(constr)
        Dim queue As OracleAQQueue = New OracleAQQueue("MyQueuname",con)

        Try
            con.Open()
            Dim oracleCommand As OracleCommand = New OracleCommand("Select MSGID  from INTEGRATION_MSG_QUEUE where msgid='B85439241C9241A4A6B1869F08F382E7'",con)
            Dim K = oracleCommand.ExecuteScalar()
            Dim rawBytesFromOracle As Byte() = TryCast(K,Byte())
            Dim txn As Oracle.DataAccess.Client.OracleTransaction = con.BeginTransaction()
            queue.DequeueOptions.Visibility = OracleAQVisibilityMode.OnCommit
            queue.DequeueOptions.Wait = 0
            queue.DequeueOptions.DequeueMode = OracleAQDequeueMode.Locked
            queue.DequeueOptions.MessageId = rawBytesFromOracle
            queue.MessageType = OracleAQMessageType.Udt
            queue.UdtTypeName = "TRIGGER_AUDIT_TYPE"
            Dim deqMsg As OracleAQMessage = queue.Dequeue()
            Dim data As TRIGGER_AUDIT_TYPE = CType(deqMsg.Payload,TRIGGER_AUDIT_TYPE)
            Console.WriteLine("Dequeued message...." & data.CMESSAGEBODY) ''Iam getting data here
            txn.Commit()
        Catch e As Exception
            Console.WriteLine("Error: {0}",e.Message)
        Finally
            con.Close()
            con.Dispose()
        End Try
    End Sub

我的队列就像

BEGIN DBMS_AQADM.CREATE_QUEUE_TABLE(
     Queue_table        => '"instance"."INTEGRATION_MSG_QUEUE"',Queue_payload_type => '"instance"."TRIGGER_AUDIT_TYPE"',Sort_list          => 'ENQ_TIME',Compatible         => '10.0.0',primary_instance   => 3,secondary_instance => 2);
  END;
  
   BEGIN DBMS_AQADM.CREATE_QUEUE(
     Queue_name          => '"instance"."INTEGRATION_MSG_QUEUE_Q"',Queue_table         => '"instance"."INTEGRATION_MSG_QUEUE"',Queue_type          =>  0,Max_retries         =>  5,Retry_delay         =>  0,dependency_tracking =>  FALSE);
  END;

有人可以建议我做错了吗

解决方法

你需要使用：

queue.DequeueOptions.DequeueMode = OracleAQDequeueMode.Remove

或：

queue.DequeueOptions.DequeueMode = OracleAQDequeueMode.RemoveNoData

当您使用 Locked 模式时，您只是在浏览并获取消息的锁定。您需要实际更新它。

见： https://docs.oracle.com/cd/E11882_01/win.112/e23174/OracleAQDequeueModeEnumeration.htm#ODPNT3687