| /* |
| * 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.rocksdb; |
| |
| import java.util.List; |
| import java.util.Set; |
| |
| import org.apache.commons.lang3.tuple.Pair; |
| import org.rocksdb.RocksDBException; |
| |
| import org.apache.hugegraph.backend.store.BackendEntry.BackendColumnIterator; |
| import org.apache.hugegraph.backend.store.BackendSession.AbstractBackendSession; |
| import org.apache.hugegraph.backend.store.BackendSessionPool; |
| import org.apache.hugegraph.config.HugeConfig; |
| |
| public abstract class RocksDBSessions extends BackendSessionPool { |
| |
| public RocksDBSessions(HugeConfig config, String database, String store) { |
| super(config, database + "/" + store); |
| } |
| |
| public abstract Set<String> openedTables(); |
| |
| public abstract void createTable(String... tables) throws RocksDBException; |
| |
| public abstract void dropTable(String... tables) throws RocksDBException; |
| |
| public abstract boolean existsTable(String table); |
| |
| public abstract List<String> property(String property); |
| |
| public abstract void compactRange(); |
| |
| public abstract RocksDBSessions copy(HugeConfig config, |
| String database, String store); |
| |
| public abstract void createSnapshot(String snapshotPath); |
| |
| public abstract void resumeSnapshot(String snapshotPath); |
| |
| public abstract String buildSnapshotPath(String snapshotPrefix); |
| |
| public abstract String hardLinkSnapshot(String snapshotPath) |
| throws RocksDBException; |
| |
| public abstract void reloadRocksDB() throws RocksDBException; |
| |
| public abstract void forceCloseRocksDB(); |
| |
| @Override |
| public abstract Session session(); |
| |
| /** |
| * Session for RocksDB |
| */ |
| public abstract static class Session extends AbstractBackendSession { |
| |
| public static final int SCAN_ANY = 0x80; |
| public static final int SCAN_PREFIX_BEGIN = 0x01; |
| public static final int SCAN_PREFIX_END = 0x02; |
| public static final int SCAN_GT_BEGIN = 0x04; |
| public static final int SCAN_GTE_BEGIN = 0x0c; |
| public static final int SCAN_LT_END = 0x10; |
| public static final int SCAN_LTE_END = 0x30; |
| |
| public abstract String dataPath(); |
| |
| public abstract String walPath(); |
| |
| public abstract String property(String table, String property); |
| |
| public abstract Pair<byte[], byte[]> keyRange(String table); |
| |
| public abstract void compactRange(String table); |
| |
| public abstract void put(String table, byte[] key, byte[] value); |
| |
| public abstract void merge(String table, byte[] key, byte[] value); |
| |
| public abstract void increase(String table, byte[] key, byte[] value); |
| |
| public abstract void delete(String table, byte[] key); |
| |
| public abstract void deleteSingle(String table, byte[] key); |
| |
| public abstract void deletePrefix(String table, byte[] key); |
| |
| public abstract void deleteRange(String table, |
| byte[] keyFrom, byte[] keyTo); |
| |
| public abstract byte[] get(String table, byte[] key); |
| |
| public abstract BackendColumnIterator get(String table, |
| List<byte[]> keys); |
| |
| public abstract BackendColumnIterator scan(String table); |
| |
| public abstract BackendColumnIterator scan(String table, |
| byte[] prefix); |
| |
| public abstract BackendColumnIterator scan(String table, |
| byte[] keyFrom, |
| byte[] keyTo, |
| int scanType); |
| |
| public BackendColumnIterator scan(String table, |
| byte[] keyFrom, |
| byte[] keyTo) { |
| return this.scan(table, keyFrom, keyTo, SCAN_LT_END); |
| } |
| |
| public static boolean matchScanType(int expected, int actual) { |
| return (expected & actual) == expected; |
| } |
| } |
| |
| public interface Countable { |
| |
| long count(); |
| } |
| } |