| /* |
| * 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.flink.contrib.streaming.state; |
| |
| import org.rocksdb.ColumnFamilyOptions; |
| import org.rocksdb.DBOptions; |
| import org.rocksdb.ReadOptions; |
| import org.rocksdb.WriteOptions; |
| |
| import java.util.Collection; |
| |
| /** |
| * A factory for {@link DBOptions} and {@link ColumnFamilyOptions} to be passed to the {@link |
| * EmbeddedRocksDBStateBackend}. Options have to be created lazily by this factory, because the |
| * {@code Options} class is not serializable and holds pointers to native code. |
| * |
| * <p>A typical pattern to use this RocksDBOptionsFactory is as follows: |
| * |
| * <pre>{@code |
| * rocksDbBackend.setRocksDBOptions(new RocksDBOptionsFactory() { |
| * |
| * public DBOptions createDBOptions(DBOptions currentOptions, Collection<AutoCloseable> handlesToClose) { |
| * return currentOptions.setMaxOpenFiles(1024); |
| * } |
| * |
| * public ColumnFamilyOptions createColumnOptions(ColumnFamilyOptions currentOptions, Collection<AutoCloseable> handlesToClose) { |
| * BloomFilter bloomFilter = new BloomFilter(); |
| * handlesToClose.add(bloomFilter); |
| * |
| * return currentOptions |
| * .setTableFormatConfig( |
| * new BlockBasedTableConfig().setFilter(bloomFilter)); |
| * } |
| * }); |
| * }</pre> |
| */ |
| public interface RocksDBOptionsFactory extends java.io.Serializable { |
| |
| /** |
| * This method should set the additional options on top of the current options object. The |
| * current options object may contain pre-defined options based on flags that have been |
| * configured on the state backend. |
| * |
| * <p>It is important to set the options on the current object and return the result from the |
| * setter methods, otherwise the pre-defined options may get lost. |
| * |
| * @param currentOptions The options object with the pre-defined options. |
| * @param handlesToClose The collection to register newly created {@link |
| * org.rocksdb.RocksObject}s. |
| * @return The options object on which the additional options are set. |
| */ |
| DBOptions createDBOptions(DBOptions currentOptions, Collection<AutoCloseable> handlesToClose); |
| |
| /** |
| * This method should set the additional options on top of the current options object. The |
| * current options object may contain pre-defined options based on flags that have been |
| * configured on the state backend. |
| * |
| * <p>It is important to set the options on the current object and return the result from the |
| * setter methods, otherwise the pre-defined options may get lost. |
| * |
| * @param currentOptions The options object with the pre-defined options. |
| * @param handlesToClose The collection to register newly created {@link |
| * org.rocksdb.RocksObject}s. |
| * @return The options object on which the additional options are set. |
| */ |
| ColumnFamilyOptions createColumnOptions( |
| ColumnFamilyOptions currentOptions, Collection<AutoCloseable> handlesToClose); |
| |
| /** |
| * This method should enable certain RocksDB metrics to be forwarded to Flink's metrics |
| * reporter. |
| * |
| * <p>Enabling these monitoring options may degrade RockDB performance and should be set with |
| * care. |
| * |
| * @param nativeMetricOptions The options object with the pre-defined options. |
| * @return The options object on which the additional options are set. |
| */ |
| default RocksDBNativeMetricOptions createNativeMetricsOptions( |
| RocksDBNativeMetricOptions nativeMetricOptions) { |
| return nativeMetricOptions; |
| } |
| |
| /** |
| * This method should set the additional options on top of the current options object. The |
| * current options object may contain pre-defined options based on flags that have been |
| * configured on the state backend. |
| * |
| * <p>It is important to set the options on the current object and return the result from the |
| * setter methods, otherwise the pre-defined options may get lost. |
| * |
| * @param currentOptions The options object with the pre-defined options. |
| * @param handlesToClose The collection to register newly created {@link |
| * org.rocksdb.RocksObject}s. |
| * @return The options object on which the additional options are set. |
| */ |
| default WriteOptions createWriteOptions( |
| WriteOptions currentOptions, Collection<AutoCloseable> handlesToClose) { |
| return currentOptions; |
| } |
| |
| /** |
| * This method should set the additional options on top of the current options object. The |
| * current options object may contain pre-defined options based on flags that have been |
| * configured on the state backend. |
| * |
| * <p>It is important to set the options on the current object and return the result from the |
| * setter methods, otherwise the pre-defined options may get lost. |
| * |
| * @param currentOptions The options object with the pre-defined options. |
| * @param handlesToClose The collection to register newly created {@link |
| * org.rocksdb.RocksObject}s. |
| * @return The options object on which the additional options are set. |
| */ |
| default ReadOptions createReadOptions( |
| ReadOptions currentOptions, Collection<AutoCloseable> handlesToClose) { |
| return currentOptions; |
| } |
| } |