| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.hugegraph.backend.store.memory; |
| |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| import org.apache.hugegraph.backend.store.AbstractBackendStoreProvider; |
| import org.apache.hugegraph.backend.store.BackendStore; |
| import org.apache.hugegraph.util.Events; |
| import org.apache.hugegraph.backend.store.memory.InMemoryDBStore.InMemoryGraphStore; |
| import org.apache.hugegraph.backend.store.memory.InMemoryDBStore.InMemorySchemaStore; |
| import org.apache.hugegraph.backend.store.memory.InMemoryDBStore.InMemorySystemStore; |
| import org.apache.hugegraph.config.HugeConfig; |
| |
| public class InMemoryDBStoreProvider extends AbstractBackendStoreProvider { |
| |
| public static final String TYPE = "memory"; |
| |
| private static Map<String, InMemoryDBStoreProvider> providers = null; |
| |
| public static boolean matchType(String type) { |
| return TYPE.equalsIgnoreCase(type); |
| } |
| |
| public static synchronized InMemoryDBStoreProvider instance(String graph) { |
| if (providers == null) { |
| providers = new ConcurrentHashMap<>(); |
| } |
| if (!providers.containsKey(graph)) { |
| InMemoryDBStoreProvider p = new InMemoryDBStoreProvider(graph); |
| providers.putIfAbsent(graph, p); |
| } |
| return providers.get(graph); |
| } |
| |
| private InMemoryDBStoreProvider(String graph) { |
| this.open(graph); |
| } |
| |
| @Override |
| public void open(String graph) { |
| super.open(graph); |
| /* |
| * Memory store need to init some system property, |
| * like task related property-keys and vertex-labels. |
| * don't notify from store.open() due to task-tx will |
| * call it again and cause dead |
| */ |
| this.notifyAndWaitEvent(Events.STORE_INIT); |
| } |
| |
| @Override |
| protected BackendStore newSchemaStore(HugeConfig config, String store) { |
| return new InMemorySchemaStore(this, this.graph(), store); |
| } |
| |
| @Override |
| protected BackendStore newGraphStore(HugeConfig config, String store) { |
| return new InMemoryGraphStore(this, this.graph(), store); |
| } |
| |
| @Override |
| protected BackendStore newSystemStore(HugeConfig config, String store) { |
| return new InMemorySystemStore(this, this.graph(), store); |
| } |
| |
| @Override |
| public String type() { |
| return TYPE; |
| } |
| |
| @Override |
| public String driverVersion() { |
| /* |
| * Versions history: |
| * [1.0] HugeGraph-1328: supports backend table version checking |
| * [1.1] HugeGraph-1322: add support for full-text search |
| * [1.2] #296: support range sortKey feature |
| * [1.3] #270 & #398: support shard-index and vertex + sortkey prefix, |
| * also split range table to rangeInt, rangeFloat, |
| * rangeLong and rangeDouble |
| * [1.4] #746: support userdata for indexlabel |
| * [1.5] #820: store vertex properties in one column |
| * [1.6] #894: encode label id in string index |
| * [1.7] #1333: support read frequency for property key |
| * [1.8] #1533: add meta table in system store |
| */ |
| return "1.8"; |
| } |
| } |