| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| using System; |
| |
| using Apache.NMS.ActiveMQ.Util; |
| using Apache.NMS.ActiveMQ.Commands; |
| |
| namespace Apache.NMS.ActiveMQ |
| { |
| /// <summary> |
| /// Consumes Advisory Messages for Temp Destination creation on deletion so that |
| /// the connection can track valid destinations for its sessions, and session resources. |
| /// </summary> |
| internal class AdvisoryConsumer : IDispatcher |
| { |
| private readonly Connection connection; |
| private readonly ConsumerInfo info; |
| |
| private bool closed = false; |
| private int deliveredCounter = 0; |
| |
| internal AdvisoryConsumer(Connection connection, ConsumerId consumerId) : base() |
| { |
| this.connection = connection; |
| this.info = new ConsumerInfo(); |
| this.info.ConsumerId = consumerId; |
| this.info.Destination = AdvisorySupport.TEMP_DESTINATION_COMPOSITE_ADVISORY_TOPIC; |
| this.info.PrefetchSize = 1000; |
| this.info.NoLocal = true; |
| |
| this.connection.AddDispatcher(consumerId, this); |
| this.connection.SyncRequest(this.info); |
| } |
| |
| internal void Dispose() |
| { |
| if(!closed) |
| { |
| this.closed = true; |
| try |
| { |
| RemoveInfo removeIt = new RemoveInfo(); |
| removeIt.ObjectId = this.info.ConsumerId; |
| this.connection.Oneway(removeIt); |
| } |
| catch(Exception e) |
| { |
| Tracer.Debug("Failed to send remove for AdvisoryConsumer: " + e.Message); |
| } |
| this.connection.RemoveDispatcher(this.info.ConsumerId); |
| } |
| } |
| |
| public void Dispatch(MessageDispatch messageDispatch) |
| { |
| // Auto ack messages when we reach 75% of the prefetch |
| deliveredCounter++; |
| |
| if(deliveredCounter > (0.75 * this.info.PrefetchSize)) |
| { |
| try |
| { |
| MessageAck ack = new MessageAck(); |
| ack.AckType = (byte)AckType.ConsumedAck; |
| ack.ConsumerId = messageDispatch.ConsumerId; |
| ack.Destination = messageDispatch.Destination; |
| ack.FirstMessageId = messageDispatch.Message.MessageId; |
| ack.MessageCount = deliveredCounter; |
| |
| this.connection.Oneway(ack); |
| this.deliveredCounter = 0; |
| } |
| catch(Exception e) |
| { |
| this.connection.OnAsyncException(e); |
| } |
| } |
| |
| DestinationInfo destInfo = messageDispatch.Message.DataStructure as DestinationInfo; |
| if(destInfo != null) |
| { |
| ProcessDestinationInfo(destInfo); |
| } |
| else |
| { |
| // This can happen across networks |
| Tracer.Debug("Unexpected message was dispatched to the AdvisoryConsumer: " + messageDispatch); |
| } |
| } |
| |
| private void ProcessDestinationInfo(DestinationInfo destInfo) |
| { |
| ActiveMQDestination dest = destInfo.Destination; |
| if(!dest.IsTemporary) |
| { |
| return; |
| } |
| |
| ActiveMQTempDestination tempDest = dest as ActiveMQTempDestination; |
| if(destInfo.OperationType == DestinationInfo.ADD_OPERATION_TYPE) |
| { |
| if(Tracer.IsDebugEnabled) |
| { |
| Tracer.Debug("AdvisoryConsumer adding: " + tempDest); |
| } |
| this.connection.AddTempDestination(tempDest); |
| } |
| else if(destInfo.OperationType == DestinationInfo.REMOVE_OPERATION_TYPE) |
| { |
| if(Tracer.IsDebugEnabled) |
| { |
| Tracer.Debug("AdvisoryConsumer removing: " + tempDest); |
| } |
| this.connection.RemoveTempDestination(tempDest); |
| } |
| } |
| } |
| } |
| |