| /** |
| * 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.activemq.transport; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.DataInputStream; |
| import java.io.IOException; |
| |
| import org.apache.activemq.command.Command; |
| import org.apache.activemq.command.LastPartialCommand; |
| import org.apache.activemq.command.PartialCommand; |
| import org.apache.activemq.openwire.OpenWireFormat; |
| import org.apache.activemq.util.ByteArrayInputStream; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Joins together of partial commands which were split into individual chunks of |
| * data. |
| * |
| * |
| */ |
| public class CommandJoiner extends TransportFilter { |
| private static final Logger LOG = LoggerFactory.getLogger(CommandJoiner.class); |
| |
| private ByteArrayOutputStream out = new ByteArrayOutputStream(); |
| private OpenWireFormat wireFormat; |
| |
| public CommandJoiner(Transport next, OpenWireFormat wireFormat) { |
| super(next); |
| this.wireFormat = wireFormat; |
| } |
| |
| public void onCommand(Object o) { |
| Command command = (Command)o; |
| byte type = command.getDataStructureType(); |
| if (type == PartialCommand.DATA_STRUCTURE_TYPE || type == LastPartialCommand.DATA_STRUCTURE_TYPE) { |
| PartialCommand header = (PartialCommand)command; |
| byte[] partialData = header.getData(); |
| try { |
| out.write(partialData); |
| } catch (IOException e) { |
| getTransportListener().onException(e); |
| } |
| if (type == LastPartialCommand.DATA_STRUCTURE_TYPE) { |
| try { |
| byte[] fullData = out.toByteArray(); |
| out.reset(); |
| DataInputStream dataIn = new DataInputStream(new ByteArrayInputStream(fullData)); |
| Command completeCommand = (Command)wireFormat.unmarshal(dataIn); |
| |
| LastPartialCommand lastCommand = (LastPartialCommand)command; |
| lastCommand.configure(completeCommand); |
| |
| getTransportListener().onCommand(completeCommand); |
| } catch (IOException e) { |
| LOG.warn("Failed to unmarshal partial command: " + command); |
| getTransportListener().onException(e); |
| } |
| } |
| } else { |
| getTransportListener().onCommand(command); |
| } |
| } |
| |
| public void stop() throws Exception { |
| super.stop(); |
| out = null; |
| } |
| |
| public String toString() { |
| return next.toString(); |
| } |
| } |