| /* |
| * |
| * 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. |
| * |
| */ |
| package org.apache.qpid.server.virtualhost.plugins.policies; |
| |
| import org.apache.commons.configuration.ConfigurationException; |
| import org.apache.log4j.Logger; |
| |
| import org.apache.qpid.AMQException; |
| import org.apache.qpid.protocol.AMQConstant; |
| import org.apache.qpid.server.binding.Binding; |
| import org.apache.qpid.server.configuration.plugins.ConfigurationPlugin; |
| import org.apache.qpid.server.exchange.TopicExchange; |
| import org.apache.qpid.server.logging.actors.CurrentActor; |
| import org.apache.qpid.server.protocol.AMQSessionModel; |
| import org.apache.qpid.server.queue.AMQQueue; |
| import org.apache.qpid.server.virtualhost.plugins.logging.TopicDeletePolicyMessages; |
| import org.apache.qpid.slowconsumerdetection.policies.SlowConsumerPolicyPlugin; |
| import org.apache.qpid.slowconsumerdetection.policies.SlowConsumerPolicyPluginFactory; |
| |
| public class TopicDeletePolicy implements SlowConsumerPolicyPlugin |
| { |
| private Logger _logger = Logger.getLogger(TopicDeletePolicy.class); |
| private TopicDeletePolicyConfiguration _configuration; |
| |
| public static class TopicDeletePolicyFactory implements SlowConsumerPolicyPluginFactory |
| { |
| public TopicDeletePolicy newInstance(ConfigurationPlugin configuration) throws ConfigurationException |
| { |
| TopicDeletePolicyConfiguration config = |
| configuration.getConfiguration(TopicDeletePolicyConfiguration.class.getName()); |
| |
| TopicDeletePolicy policy = new TopicDeletePolicy(); |
| policy.configure(config); |
| return policy; |
| } |
| |
| public String getPluginName() |
| { |
| return "topicdelete"; |
| } |
| |
| public Class<TopicDeletePolicy> getPluginClass() |
| { |
| return TopicDeletePolicy.class; |
| } |
| } |
| |
| public void performPolicy(AMQQueue q) |
| { |
| if (q == null) |
| { |
| return; |
| } |
| |
| AMQSessionModel owner = q.getExclusiveOwningSession(); |
| |
| // Only process exclusive queues |
| if (owner == null) |
| { |
| return; |
| } |
| |
| //Only process Topics |
| if (!validateQueueIsATopic(q)) |
| { |
| return; |
| } |
| |
| try |
| { |
| CurrentActor.get().message(owner.getLogSubject(),TopicDeletePolicyMessages.DISCONNECTING()); |
| // Close the consumer . this will cause autoDelete Queues to be purged |
| owner.getConnectionModel(). |
| closeSession(owner, AMQConstant.RESOURCE_ERROR, |
| "Consuming to slow."); |
| |
| // Actively delete non autoDelete queues if deletePersistent is set |
| if (!q.isAutoDelete() && (_configuration != null && _configuration.deletePersistent())) |
| { |
| CurrentActor.get().message(q.getLogSubject(), TopicDeletePolicyMessages.DELETING_QUEUE()); |
| q.delete(); |
| } |
| |
| } |
| catch (AMQException e) |
| { |
| _logger.warn("Unable to close consumer:" + owner + ", on queue:" + q.getName()); |
| } |
| |
| } |
| |
| /** |
| * Check the queue bindings to validate the queue is bound to the |
| * topic exchange. |
| * |
| * @param q the Queue |
| * |
| * @return true iff Q is bound to a TopicExchange |
| */ |
| private boolean validateQueueIsATopic(AMQQueue q) |
| { |
| for (Binding binding : q.getBindings()) |
| { |
| if (binding.getExchange() instanceof TopicExchange) |
| { |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| public void configure(ConfigurationPlugin config) |
| { |
| _configuration = (TopicDeletePolicyConfiguration) config; |
| } |
| |
| @Override |
| public String toString() |
| { |
| return "TopicDelete" + (_configuration == null ? "" : "[" + _configuration + "]"); |
| } |
| } |