diff options
Diffstat (limited to 'qpid/java/broker/src/main/java/org/apache/qpid/server/handler/BasicConsumeMethodHandler.java')
| -rw-r--r-- | qpid/java/broker/src/main/java/org/apache/qpid/server/handler/BasicConsumeMethodHandler.java | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/qpid/java/broker/src/main/java/org/apache/qpid/server/handler/BasicConsumeMethodHandler.java b/qpid/java/broker/src/main/java/org/apache/qpid/server/handler/BasicConsumeMethodHandler.java new file mode 100644 index 0000000000..7cd4afdb77 --- /dev/null +++ b/qpid/java/broker/src/main/java/org/apache/qpid/server/handler/BasicConsumeMethodHandler.java @@ -0,0 +1,169 @@ +/* + * + * 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.handler; + +import org.apache.log4j.Logger; +import org.apache.qpid.AMQException; +import org.apache.qpid.framing.*; +import org.apache.qpid.protocol.AMQConstant; +import org.apache.qpid.server.AMQChannel; +import org.apache.qpid.server.ConsumerTagNotUniqueException; +import org.apache.qpid.server.protocol.AMQProtocolSession; +import org.apache.qpid.server.queue.AMQQueue; +import org.apache.qpid.server.security.access.Permission; +import org.apache.qpid.server.state.AMQStateManager; +import org.apache.qpid.server.state.StateAwareMethodListener; +import org.apache.qpid.server.virtualhost.VirtualHost; + +public class BasicConsumeMethodHandler implements StateAwareMethodListener<BasicConsumeBody> +{ + private static final Logger _logger = Logger.getLogger(BasicConsumeMethodHandler.class); + + private static final BasicConsumeMethodHandler _instance = new BasicConsumeMethodHandler(); + + public static BasicConsumeMethodHandler getInstance() + { + return _instance; + } + + private BasicConsumeMethodHandler() + { + } + + public void methodReceived(AMQStateManager stateManager, BasicConsumeBody body, int channelId) throws AMQException + { + AMQProtocolSession session = stateManager.getProtocolSession(); + + + + + AMQChannel channel = session.getChannel(channelId); + + VirtualHost vHost = session.getVirtualHost(); + + if (channel == null) + { + throw body.getChannelNotFoundException(channelId); + } + else + { + if (_logger.isDebugEnabled()) + { + _logger.debug("BasicConsume: from '" + body.getQueue() + + "' for:" + body.getConsumerTag() + + " nowait:" + body.getNowait() + + " args:" + body.getArguments()); + } + + AMQQueue queue = body.getQueue() == null ? channel.getDefaultQueue() : vHost.getQueueRegistry().getQueue(body.getQueue().intern()); + + if (queue == null) + { + if (_logger.isDebugEnabled()) + { + _logger.debug("No queue for '" + body.getQueue() + "'"); + } + if (body.getQueue() != null) + { + String msg = "No such queue, '" + body.getQueue() + "'"; + throw body.getChannelException(AMQConstant.NOT_FOUND, msg); + } + else + { + String msg = "No queue name provided, no default queue defined."; + throw body.getConnectionException(AMQConstant.NOT_ALLOWED, msg); + } + } + else + { + + final AMQShortString consumerTagName; + + //Perform ACLs + vHost.getAccessManager().authorise(session, Permission.CONSUME, body, queue); + + if (body.getConsumerTag() != null) + { + consumerTagName = body.getConsumerTag().intern(); + } + else + { + consumerTagName = null; + } + + try + { + AMQShortString consumerTag = channel.subscribeToQueue(consumerTagName, queue, session, !body.getNoAck(), + body.getArguments(), body.getNoLocal(), body.getExclusive()); + if (!body.getNowait()) + { + MethodRegistry methodRegistry = session.getMethodRegistry(); + AMQMethodBody responseBody = methodRegistry.createBasicConsumeOkBody(consumerTag); + session.writeFrame(responseBody.generateFrame(channelId)); + + } + + //now allow queue to start async processing of any backlog of messages + queue.deliverAsync(); + } + catch (org.apache.qpid.AMQInvalidArgumentException ise) + { + _logger.debug("Closing connection due to invalid selector"); + + MethodRegistry methodRegistry = session.getMethodRegistry(); + AMQMethodBody responseBody = methodRegistry.createChannelCloseBody(AMQConstant.INVALID_ARGUMENT.getCode(), + new AMQShortString(ise.getMessage()), + body.getClazz(), + body.getMethod()); + session.writeFrame(responseBody.generateFrame(channelId)); + + + } + catch (ConsumerTagNotUniqueException e) + { + AMQShortString msg = new AMQShortString("Non-unique consumer tag, '" + body.getConsumerTag() + "'"); + + MethodRegistry methodRegistry = session.getMethodRegistry(); + AMQMethodBody responseBody = methodRegistry.createConnectionCloseBody(AMQConstant.NOT_ALLOWED.getCode(), // replyCode + msg, // replytext + body.getClazz(), + body.getMethod()); + session.writeFrame(responseBody.generateFrame(0)); + } + catch (AMQQueue.ExistingExclusiveSubscription e) + { + throw body.getChannelException(AMQConstant.ACCESS_REFUSED, + "Cannot subscribe to queue " + + queue.getName() + + " as it already has an existing exclusive consumer"); + } + catch (AMQQueue.ExistingSubscriptionPreventsExclusive e) + { + throw body.getChannelException(AMQConstant.ACCESS_REFUSED, + "Cannot subscribe to queue " + + queue.getName() + + " exclusively as it already has a consumer"); + } + + } + } + } +} |