001/* 002 * (C) Copyright 2006-2014 Nuxeo SA (http://nuxeo.com/) and others. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 * 016 * Contributors: 017 * Florent Guillaume 018 */ 019package org.nuxeo.ecm.core.opencmis.bindings; 020 021import java.util.function.Supplier; 022 023import org.apache.chemistry.opencmis.commons.data.ExtensionsData; 024import org.apache.chemistry.opencmis.commons.data.FailedToDeleteData; 025import org.apache.chemistry.opencmis.commons.enums.UnfileObject; 026import org.apache.chemistry.opencmis.commons.exceptions.CmisBaseException; 027import org.apache.chemistry.opencmis.commons.exceptions.CmisInvalidArgumentException; 028import org.apache.chemistry.opencmis.commons.exceptions.CmisRuntimeException; 029import org.apache.chemistry.opencmis.commons.exceptions.CmisUpdateConflictException; 030import org.apache.chemistry.opencmis.commons.server.CmisService; 031import org.apache.chemistry.opencmis.server.support.wrapper.ConformanceCmisServiceWrapper; 032import org.nuxeo.ecm.core.api.ConcurrentUpdateException; 033import org.nuxeo.ecm.core.api.RecoverableClientException; 034import org.nuxeo.ecm.core.query.QueryParseException; 035import org.nuxeo.runtime.transaction.TransactionHelper; 036import org.slf4j.Logger; 037import org.slf4j.LoggerFactory; 038 039/** 040 * CMIS Conformance Service Wrapper that has better exception handling than the default. 041 */ 042public class NuxeoCmisServiceWrapper extends ConformanceCmisServiceWrapper { 043 044 private static final Logger LOG = LoggerFactory.getLogger(NuxeoCmisServiceWrapper.class); 045 046 public NuxeoCmisServiceWrapper(CmisService service) { 047 super(service); 048 } 049 050 /** 051 * Converts the given exception into a CMIS exception. 052 */ 053 @Override 054 protected CmisBaseException createCmisException(Exception e) { 055 // make sure that the transaction is marked rollback-only, as higher layers in the 056 // CMIS services stack will swallow it and turn it into a high-level HTTP error 057 TransactionHelper.setTransactionRollbackOnly(); 058 059 // map exception into CmisBaseException 060 if (e == null) { 061 return new CmisRuntimeException("Unknown exception!"); 062 } else if (e instanceof CmisBaseException) { 063 return (CmisBaseException) e; 064 } else if (e instanceof RecoverableClientException) { 065 return new CmisRuntimeException(e.getMessage(), e); 066 } else if (e instanceof QueryParseException) { 067 return new CmisInvalidArgumentException(e.getMessage(), e); 068 } else if (e instanceof ConcurrentUpdateException) { 069 return new CmisUpdateConflictException(e.getMessage(), e); 070 } else { 071 // should not happen if the connector works correctly 072 // it's alarming enough to log the exception 073 LOG.warn(e.toString(), e); 074 return new CmisRuntimeException(e.getMessage(), e); 075 } 076 } 077 078 protected void runWithRetryOnConflict(Runnable runnable) { 079 runWithRetryOnConflict(() -> { 080 runnable.run(); 081 return null; 082 }); 083 } 084 085 protected <R> R runWithRetryOnConflict(Supplier<R> supplier) { 086 try { 087 return supplier.get(); 088 } catch (CmisUpdateConflictException e) { 089 // retry once 090 TransactionHelper.setTransactionRollbackOnly(); 091 TransactionHelper.commitOrRollbackTransaction(); 092 TransactionHelper.startTransaction(); 093 return supplier.get(); 094 } 095 } 096 097 @Override 098 public void deleteObject(String repositoryId, String objectId, Boolean allVersions, ExtensionsData extension) { 099 runWithRetryOnConflict(() -> super.deleteObject(repositoryId, objectId, allVersions, extension)); 100 } 101 102 @Override 103 public void deleteObjectOrCancelCheckOut(String repositoryId, String objectId, Boolean allVersions, 104 ExtensionsData extension) { 105 runWithRetryOnConflict( 106 () -> super.deleteObjectOrCancelCheckOut(repositoryId, objectId, allVersions, extension)); 107 } 108 109 @Override 110 public FailedToDeleteData deleteTree(String repositoryId, String folderId, Boolean allVersions, 111 UnfileObject unfileObjects, Boolean continueOnFailure, ExtensionsData extension) { 112 return runWithRetryOnConflict(() -> super.deleteTree(repositoryId, folderId, allVersions, unfileObjects, 113 continueOnFailure, extension)); 114 } 115 116}