diff options
Diffstat (limited to 'trunk/qpid/java/management/client/src/main/java/org/apache/qpid/management/domain/services/BrokerMessageListener.java')
| -rw-r--r-- | trunk/qpid/java/management/client/src/main/java/org/apache/qpid/management/domain/services/BrokerMessageListener.java | 183 |
1 files changed, 0 insertions, 183 deletions
diff --git a/trunk/qpid/java/management/client/src/main/java/org/apache/qpid/management/domain/services/BrokerMessageListener.java b/trunk/qpid/java/management/client/src/main/java/org/apache/qpid/management/domain/services/BrokerMessageListener.java deleted file mode 100644 index fc9819fce4..0000000000 --- a/trunk/qpid/java/management/client/src/main/java/org/apache/qpid/management/domain/services/BrokerMessageListener.java +++ /dev/null @@ -1,183 +0,0 @@ -/* - * - * 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.management.domain.services; - -import java.io.IOException; -import java.nio.ByteBuffer; -import java.util.Arrays; -import java.util.HashMap; -import java.util.Map; -import java.util.Map.Entry; - -import org.apache.qpid.api.Message; -import org.apache.qpid.management.Messages; -import org.apache.qpid.management.Protocol; -import org.apache.qpid.management.domain.handler.base.IMessageHandler; -import org.apache.qpid.management.domain.model.DomainModel; -import org.apache.qpid.nclient.util.MessageListener; -import org.apache.qpid.transport.codec.BBDecoder; -import org.apache.qpid.transport.util.Logger; - -/** - * Message listener used for processing incoming messages. - * So it is installed as a consumer on a specific channel and when a new message arrives: - * - * 1) Performs a sanity check on the message (magic number, sequence number) - * 2) Extracts the opcode and looks for one message handler associated with that opcode. - * 3) If a message handler is found the delegates the message processing; otherwise a log message is written to indicate - * that the message will be skipped. - * - * @author Andrea Gazzarini - */ -class BrokerMessageListener implements MessageListener -{ - private final static Logger LOGGER = Logger.get(BrokerMessageListener.class); - - private static class Log - { - // Debugs the content of the incoming message. - static void debugIncomingMessage(ByteBuffer message) - { - if (LOGGER.isDebugEnabled()) - { - LOGGER.debug(Messages.QMAN_200001_INCOMING_MESSAGE_HAS_BEEN_RECEIVED, Arrays.toString(message.array())); - } - } - - // Debugs all the configured handlers. - static void debugConfiguredHandlers (Map<Character, IMessageHandler> _handlers) - { - if (LOGGER.isDebugEnabled()) - { - for (Entry<Character, IMessageHandler> entry : _handlers.entrySet()) - { - LOGGER.debug(Messages.QMAN_200002_OPCODE_HANDLER_ASSOCIATION,entry.getKey(),entry.getValue()); - } - } - } - } - - Map<Character, IMessageHandler> _handlers = new HashMap<Character, IMessageHandler>(); - private DomainModel _domainModel; - - /** - * Builds a new message listener with the given broker domain model. - * - * @param model the managed broker domain model. - */ - BrokerMessageListener(DomainModel model) - { - this._domainModel = model; - } - - /** - * When a new message arrives this method is called. - * 1) Performs a sanity check on the message (magic number, sequence number) - * 2) Extracts the opcode and looks for one message handler associated with that opcode. - * 3) If a message handler is found the delegates the message processing; otherwise a log message is written to indicate - * that the message will be skipped. - * - * @param message the incoming message. - */ - public void onMessage (Message compoundMessage) - { - try - { - MessageTokenizer tokenizer = new MessageTokenizer(compoundMessage); - while (tokenizer.hasMoreElements()) - { - dispatch(tokenizer.nextElement()); - } - } catch(IOException exception) - { - LOGGER.error(exception,Messages.QMAN_100002_MESSAGE_READ_FAILURE); - } catch(Exception exception) - { - LOGGER.error(exception,Messages.QMAN_100003_MESSAGE_PROCESS_FAILURE); - } - } - - /** - * Configures a new handler with this listener. - * After that, each time a message arrives with the specified opcode, this handler will be responsible for - * processing. - * Note that calling this method will switch this listener to a WORKING state. - * - * @param opcode the operation code. - * @param handler the message handler. - */ - void setHandlers(Map<Character, IMessageHandler> handlers) - { - for (Entry<Character, IMessageHandler> entry : handlers.entrySet()) - { - char opcode = entry.getKey(); - IMessageHandler handler = entry.getValue(); - try - { - handler.setDomainModel(_domainModel); - _handlers.put(opcode, handler); - } catch (Exception exception) { - LOGGER.error(exception, - Messages.QMAN_100004_HANDLER_INITIALIZATION_FAILURE, - opcode); - } - } - } - - - - /** - * Dispatches the given message to the appropriate handler. - * - * @param message - * the incoming message. - * @throws IOException - * when the message content cannot be read. - */ - private void dispatch(Message message) throws IOException - { - ByteBuffer buffer = message.readData(); - - String magicNumber = new String(new byte[] {buffer.get(),buffer.get(),buffer.get()}); - if (!Protocol.MAGIC_NUMBER.equals(magicNumber)) - { - LOGGER.error(Messages.QMAN_100001_BAD_MAGIC_NUMBER_FAILURE,magicNumber); - return; - } - - char opcode = (char)buffer.get(); - - IMessageHandler handler = _handlers.get(opcode); - if (handler != null) - { - BBDecoder decoder = new BBDecoder(); - decoder.init(buffer); - - LOGGER.debug(Messages.QMAN_200003_MESSAGE_FORWARDING,opcode,handler); - - handler.process(decoder,decoder.readSequenceNo()); - } else - { - LOGGER.warn(Messages.QMAN_300001_MESSAGE_DISCARDED,opcode); - Log.debugConfiguredHandlers(_handlers); - } - } -} |