001/* 002 * (C) Copyright 2017 Nuxeo (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 * Funsho David 018 * 019 */ 020 021package org.nuxeo.directory.mongodb; 022 023import static org.nuxeo.directory.mongodb.MongoDBSerializationHelper.MONGODB_ID; 024import static org.nuxeo.directory.mongodb.MongoDBSerializationHelper.MONGODB_SEQ; 025import static org.nuxeo.ecm.directory.BaseDirectoryDescriptor.CREATE_TABLE_POLICY_ALWAYS; 026import static org.nuxeo.ecm.directory.BaseDirectoryDescriptor.CREATE_TABLE_POLICY_ON_MISSING_COLUMNS; 027 028import java.util.Arrays; 029import java.util.HashMap; 030import java.util.Map; 031 032import org.nuxeo.ecm.core.schema.SchemaManager; 033import org.nuxeo.ecm.core.schema.types.Schema; 034import org.nuxeo.ecm.directory.AbstractDirectory; 035import org.nuxeo.ecm.directory.Directory; 036import org.nuxeo.ecm.directory.DirectoryCSVLoader; 037import org.nuxeo.ecm.directory.DirectoryException; 038import org.nuxeo.ecm.directory.Session; 039import org.nuxeo.runtime.api.Framework; 040 041import com.mongodb.client.MongoCollection; 042 043/** 044 * MongoDB implementation of a {@link Directory} 045 * 046 * @since 9.1 047 */ 048public class MongoDBDirectory extends AbstractDirectory { 049 050 protected String countersCollectionName; 051 052 // used in double-checked locking for lazy init 053 protected volatile boolean initialized; 054 055 public MongoDBDirectory(MongoDBDirectoryDescriptor descriptor) { 056 super(descriptor, MongoDBReference.class); 057 058 // Add specific references 059 addMongoDBReferences(descriptor.getMongoDBReferences()); 060 061 // cache fallback 062 fallbackOnDefaultCache(); 063 064 countersCollectionName = getName() + ".counters"; 065 } 066 067 @Override 068 public MongoDBDirectoryDescriptor getDescriptor() { 069 return (MongoDBDirectoryDescriptor) descriptor; 070 } 071 072 @Override 073 public Session getSession() throws DirectoryException { 074 MongoDBSession session = new MongoDBSession(this); 075 addSession(session); 076 initializeIfNeeded(session); 077 return session; 078 } 079 080 protected void initializeIfNeeded(MongoDBSession session) { 081 if (!initialized) { 082 synchronized (this) { 083 if (!initialized) { 084 initialize(session); 085 initialized = true; 086 } 087 } 088 } 089 } 090 091 protected void initialize(MongoDBSession session) { 092 initSchemaFieldMap(); 093 094 // Initialize counters collection if autoincrement enabled 095 if (descriptor.isAutoincrementIdField() && !session.hasCollection(countersCollectionName)) { 096 Map<String, Object> seq = new HashMap<>(); 097 seq.put(MONGODB_ID, getName()); 098 seq.put(MONGODB_SEQ, 0L); 099 session.getCollection(countersCollectionName).insertOne(MongoDBSerializationHelper.fieldMapToBson(seq)); 100 } 101 102 String policy = descriptor.getCreateTablePolicy(); 103 MongoCollection collection = session.getCollection(getName()); 104 boolean dropCollection = false; 105 boolean loadData = false; 106 107 switch (policy) { 108 case CREATE_TABLE_POLICY_ALWAYS: 109 dropCollection = true; 110 loadData = true; 111 break; 112 case CREATE_TABLE_POLICY_ON_MISSING_COLUMNS: 113 // As MongoDB does not have the notion of columns, only load data if collection doesn't exist 114 if (!session.hasCollection(getName())) { 115 loadData = true; 116 } 117 default: 118 break; 119 } 120 if (dropCollection) { 121 collection.drop(); 122 } 123 if (loadData) { 124 SchemaManager schemaManager = Framework.getService(SchemaManager.class); 125 Schema schema = schemaManager.getSchema(getSchema()); 126 loadData(schema, session); 127 } 128 } 129 130 protected void loadData(Schema schema, Session session) { 131 if (descriptor.getDataFileName() != null) { 132 Framework.doPrivileged(() -> DirectoryCSVLoader.loadData(descriptor.getDataFileName(), 133 descriptor.getDataFileCharacterSeparator(), schema, session::createEntry)); 134 } 135 } 136 137 protected void addMongoDBReferences(MongoDBReferenceDescriptor[] mongodbReferences) { 138 if (mongodbReferences != null) { 139 Arrays.stream(mongodbReferences).map(MongoDBReference::new).forEach(this::addReference); 140 } 141 } 142 143 public String getCountersCollectionName() { 144 return countersCollectionName; 145 } 146 147 @Override 148 public void shutdown() { 149 super.shutdown(); 150 } 151 152}