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.impl;
018    
019    import java.util.ArrayList;
020    import java.util.List;
021    
022    import org.apache.camel.Exchange;
023    import org.apache.camel.spi.SubUnitOfWork;
024    import org.apache.camel.spi.SubUnitOfWorkCallback;
025    
026    /**
027     * A default implementation of {@link org.apache.camel.spi.SubUnitOfWork} combined
028     * with a {@link SubUnitOfWorkCallback} to gather callbacks into this {@link SubUnitOfWork} state
029     */
030    public class DefaultSubUnitOfWork implements SubUnitOfWork, SubUnitOfWorkCallback {
031    
032        private List<Exception> failedExceptions;
033        private boolean failed;
034    
035        @Override
036        public void onExhausted(Exchange exchange) {
037            if (exchange.getException() != null) {
038                addFailedException(exchange.getException());
039                failed = true;
040            }
041        }
042    
043        @Override
044        public void onDone(Exchange exchange) {
045            if (exchange.getException() != null) {
046                addFailedException(exchange.getException());
047                failed = true;
048            }
049        }
050    
051        @Override
052        public boolean isFailed() {
053            return failed;
054        }
055    
056        @Override
057        public List<Exception> getExceptions() {
058            return failedExceptions;
059        }
060    
061        private void addFailedException(Exception exception) {
062            if (failedExceptions == null) {
063                failedExceptions = new ArrayList<Exception>();
064            }
065            failedExceptions.add(exception);
066        }
067    
068    }