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.util; 018 019 import java.util.ArrayList; 020 import java.util.Collections; 021 import java.util.List; 022 023 import org.apache.camel.Exchange; 024 import org.apache.camel.spi.Synchronization; 025 import org.slf4j.Logger; 026 027 /** 028 * @version 029 */ 030 public final class UnitOfWorkHelper { 031 032 private UnitOfWorkHelper() { 033 } 034 035 public static void doneSynchronizations(Exchange exchange, List<Synchronization> synchronizations, Logger log) { 036 boolean failed = exchange.isFailed(); 037 038 if (synchronizations != null && !synchronizations.isEmpty()) { 039 // work on a copy of the list to avoid any modification which may cause ConcurrentModificationException 040 List<Synchronization> copy = new ArrayList<Synchronization>(synchronizations); 041 042 // reverse so we invoke it FILO style instead of FIFO 043 Collections.reverse(copy); 044 // and honor if any was ordered by sorting it accordingly 045 Collections.sort(copy, new OrderedComparator()); 046 047 // invoke synchronization callbacks 048 for (Synchronization synchronization : copy) { 049 try { 050 if (failed) { 051 log.trace("Invoking synchronization.onFailure: {} with {}", synchronization, exchange); 052 synchronization.onFailure(exchange); 053 } else { 054 log.trace("Invoking synchronization.onComplete: {} with {}", synchronization, exchange); 055 synchronization.onComplete(exchange); 056 } 057 } catch (Throwable e) { 058 // must catch exceptions to ensure all synchronizations have a chance to run 059 log.warn("Exception occurred during onCompletion. This exception will be ignored.", e); 060 } 061 } 062 } 063 } 064 065 }