001/* 002 * (C) Copyright 2013 Nuxeo SA (http://nuxeo.com/) and contributors. 003 * 004 * All rights reserved. This program and the accompanying materials 005 * are made available under the terms of the GNU Lesser General Public License 006 * (LGPL) version 2.1 which accompanies this distribution, and is available at 007 * http://www.gnu.org/licenses/lgpl-2.1.html 008 * 009 * This library is distributed in the hope that it will be useful, 010 * but WITHOUT ANY WARRANTY; without even the implied warranty of 011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 012 * Lesser General Public License for more details. 013 * 014 * Contributors: 015 * Vladimir Pasquier <vpasquier@nuxeo.com> 016 */ 017package org.nuxeo.ecm.automation.core.exception; 018 019import java.util.HashMap; 020import java.util.Map; 021 022import org.nuxeo.ecm.automation.ChainException; 023import org.nuxeo.ecm.automation.OperationException; 024import org.nuxeo.runtime.model.ContributionFragmentRegistry; 025 026/** 027 * @since 5.7.3 028 */ 029public class ChainExceptionRegistry extends ContributionFragmentRegistry<ChainException> { 030 031 /** 032 * Modifiable automation filter registry. Modifying the registry is using a lock and it's thread safe. Modifications 033 * are removing the cache. 034 */ 035 protected final Map<String, ChainException> chainExceptions = new HashMap<>(); 036 037 /** 038 * Read only cache for automation filter lookup. Thread safe. Not using synchronization if cache already created. 039 */ 040 protected volatile Map<String, ChainException> lookup; 041 042 public synchronized void addContribution(ChainException chainException, boolean replace) throws OperationException { 043 if (!replace && chainExceptions.containsKey(chainException.getId())) { 044 throw new OperationException("An exception chain is already bound to: " + chainException.getId() 045 + ". Use 'replace=true' to replace an existing exception chain"); 046 } 047 super.addContribution(chainException); 048 } 049 050 @Override 051 public boolean isSupportingMerge() { 052 return false; 053 } 054 055 @Override 056 public String getContributionId(ChainException contrib) { 057 return contrib.getId(); 058 } 059 060 @Override 061 public void contributionUpdated(String id, ChainException contrib, ChainException newOrigContrib) { 062 chainExceptions.put(id, contrib); 063 lookup = null; 064 } 065 066 @Override 067 public void contributionRemoved(String id, ChainException origContrib) { 068 chainExceptions.remove(id); 069 lookup = null; 070 } 071 072 @Override 073 public ChainException clone(ChainException orig) { 074 throw new UnsupportedOperationException(); 075 } 076 077 @Override 078 public void merge(ChainException src, ChainException dst) { 079 throw new UnsupportedOperationException(); 080 } 081 082 public Map<String, ChainException> lookup() { 083 Map<String, ChainException> _lookup = lookup; 084 if (_lookup == null) { 085 synchronized (this) { 086 lookup = new HashMap<String, ChainException>(chainExceptions); 087 _lookup = lookup; 088 } 089 } 090 return _lookup; 091 } 092 093 public ChainException getChainException(String onChainId) { 094 for (ChainException chainException : lookup().values()) { 095 if (onChainId.equals(chainException.getOnChainId())) { 096 return chainException; 097 } 098 } 099 return null; 100 } 101}