001 /** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 package org.apache.camel.processor; 018 019 import org.apache.camel.AsyncCallback; 020 import org.apache.camel.AsyncProcessor; 021 import org.apache.camel.Exchange; 022 import org.apache.camel.Processor; 023 import org.apache.camel.spi.RouteContext; 024 025 /** 026 * A processor that processes the processor in a {@link org.apache.camel.spi.SubUnitOfWork} context. 027 * <p/> 028 * This processor ensures the {@link org.apache.camel.spi.UnitOfWork#beginSubUnitOfWork(org.apache.camel.Exchange)} 029 * and {@link org.apache.camel.spi.UnitOfWork#endSubUnitOfWork(org.apache.camel.Exchange)} is executed. 030 * 031 * @see org.apache.camel.spi.SubUnitOfWork 032 * @see org.apache.camel.spi.SubUnitOfWorkCallback 033 */ 034 public class SubUnitOfWorkProcessor extends UnitOfWorkProcessor { 035 036 // See code comment in DefaultUnitOfWork for reasons why this implementation is named SubUnitOfWorkProcessor 037 038 public SubUnitOfWorkProcessor(Processor processor) { 039 super(processor); 040 } 041 042 public SubUnitOfWorkProcessor(AsyncProcessor processor) { 043 super(processor); 044 } 045 046 public SubUnitOfWorkProcessor(RouteContext routeContext, Processor processor) { 047 super(routeContext, processor); 048 } 049 050 public SubUnitOfWorkProcessor(RouteContext routeContext, AsyncProcessor processor) { 051 super(routeContext, processor); 052 } 053 054 @Override 055 public boolean process(final Exchange exchange, final AsyncCallback callback) { 056 // begin savepoint 057 exchange.getUnitOfWork().beginSubUnitOfWork(exchange); 058 // process the exchange 059 return super.process(exchange, new AsyncCallback() { 060 @Override 061 public void done(boolean doneSync) { 062 try { 063 // end sub unit of work 064 exchange.getUnitOfWork().endSubUnitOfWork(exchange); 065 } finally { 066 // must ensure callback is invoked 067 callback.done(doneSync); 068 } 069 } 070 071 @Override 072 public String toString() { 073 return "SubUnitOfWorkCallback"; 074 } 075 }); 076 } 077 078 @Override 079 public String toString() { 080 return "SubUnitOfWorkProcessor[" + processor + "]"; 081 } 082 }