| /* |
| * 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.ode.jbi; |
| |
| import javax.jbi.messaging.DeliveryChannel; |
| import javax.jbi.messaging.ExchangeStatus; |
| import javax.jbi.messaging.InOnly; |
| import javax.jbi.messaging.InOut; |
| import javax.jbi.messaging.MessageExchange; |
| import javax.jbi.messaging.MessagingException; |
| import javax.jbi.messaging.NormalizedMessage; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| |
| /** |
| * Base message exchange processor; handles common JBI message exchange conditions and delegates |
| * actual invocation to subclass. |
| */ |
| public abstract class BaseMessageExchangeProcessor implements JbiMessageExchangeProcessor { |
| final Log LOG = LogFactory.getLog(getClass()); |
| |
| DeliveryChannel _channel; |
| |
| public BaseMessageExchangeProcessor(DeliveryChannel channel) { |
| _channel = channel; |
| } |
| |
| /** |
| * Handle the JBI message exchange |
| */ |
| public void onJbiMessageExchange(MessageExchange jbiMex) throws MessagingException { |
| if (jbiMex.getStatus() == ExchangeStatus.DONE) { |
| // everything went right, nothing to do |
| return; |
| } |
| if (jbiMex.getStatus() == ExchangeStatus.ERROR) { |
| LOG.error("Error reported for JBI mex "+jbiMex, jbiMex.getError()); |
| return; |
| } |
| |
| if (jbiMex.getPattern().equals(MessageExchangePattern.IN_ONLY)) { |
| boolean success = false; |
| Exception err = null; |
| try { |
| invoke((InOnly) jbiMex); |
| success = true; |
| } catch (Exception ex) { |
| LOG.error("Error invoking "+getClass(), ex); |
| err = ex; |
| } finally { |
| if (!success) { |
| jbiMex.setStatus(ExchangeStatus.ERROR); |
| if (err != null && jbiMex.getError() == null) |
| jbiMex.setError(err); |
| } else { |
| if (jbiMex.getStatus() == ExchangeStatus.ACTIVE) |
| jbiMex.setStatus(ExchangeStatus.DONE); |
| } |
| _channel.send(jbiMex); |
| } |
| } else if (jbiMex.getPattern().equals(MessageExchangePattern.IN_OUT)) { |
| InOut mex = (InOut) jbiMex; |
| boolean success = false; |
| Exception err = null; |
| try { |
| NormalizedMessage response = invoke(mex); |
| mex.setOutMessage(response); |
| _channel.send(jbiMex); |
| success = true; |
| } catch (Exception ex) { |
| LOG.error("Error invoking "+getClass(), ex); |
| err = ex; |
| } catch (Throwable t) { |
| LOG.error("Unexpected error invoking ODE.", t); |
| err = new RuntimeException(t); |
| } finally { |
| // If we got an error that wasn't sent. |
| if (jbiMex.getStatus() == ExchangeStatus.ACTIVE && !success) { |
| if (err != null && jbiMex.getError() == null) { |
| jbiMex.setError(err); |
| } |
| jbiMex.setStatus(ExchangeStatus.ERROR); |
| _channel.send(jbiMex); |
| } |
| } |
| } else { |
| LOG.error("JBI MessageExchange " + jbiMex.getExchangeId() + " is of an unsupported pattern " |
| + jbiMex.getPattern()); |
| jbiMex.setStatus(ExchangeStatus.ERROR); |
| jbiMex.setError(new Exception("Unknown message exchange pattern: " + jbiMex.getPattern())); |
| } |
| |
| } |
| |
| /** |
| * Invoke with an In-Out message exchange pattern. |
| */ |
| public abstract NormalizedMessage invoke(InOut mex) throws MessagingException; |
| |
| /** |
| * Invoke with an In-Only message exchange pattern. |
| */ |
| public abstract void invoke(InOnly mex) throws MessagingException; |
| |
| } |