reswqa commented on code in PR #28402: URL: https://github.com/apache/flink/pull/28402#discussion_r3401280540
########## flink-runtime-web/src/main/java/org/apache/flink/runtime/webmonitor/history/RocksDBArchiveStorage.java: ########## @@ -0,0 +1,270 @@ +/* + * 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.runtime.webmonitor.history; + +import org.apache.flink.configuration.Configuration; +import org.apache.flink.configuration.HistoryServerOptions; +import org.apache.flink.configuration.ReadableConfig; +import org.apache.flink.util.FileUtils; +import org.apache.flink.util.IOUtils; + +import org.rocksdb.BlockBasedTableConfig; +import org.rocksdb.BloomFilter; +import org.rocksdb.CompressionType; +import org.rocksdb.NativeLibraryLoader; +import org.rocksdb.Options; +import org.rocksdb.RocksDB; +import org.rocksdb.RocksDBException; +import org.rocksdb.RocksIterator; +import org.rocksdb.WriteOptions; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import javax.annotation.Nullable; + +import java.io.File; +import java.io.IOException; +import java.nio.file.Files; +import java.util.ArrayList; +import java.util.List; +import java.util.UUID; + +import static java.nio.charset.StandardCharsets.UTF_8; +import static org.apache.flink.util.Preconditions.checkNotNull; + +/** + * A {@link ArchiveStorage} implementation backed by RocksDB. + * + * <p>All archived data is stored as key-value pairs in a single RocksDB instance, avoiding the + * problem of numerous small files. The key is the request path (e.g. {@code + * /jobs/xxx/config.json}), and the value is a JSON string. + */ +public class RocksDBArchiveStorage implements ArchiveStorage<String> { + + private static final Logger LOG = LoggerFactory.getLogger(RocksDBArchiveStorage.class); + + private final RocksDB db; + + private BlockBasedTableConfig tableFormatConfig; + + private Options dbOptions; + + private WriteOptions writeOptions; + + private BloomFilter bloomFilter; + + private final ArrayList<AutoCloseable> handlesToClose; + + /** + * Creates a new {@link RocksDBArchiveStorage} instance with default RocksDB options. + * + * @param dbPath the RocksDB database directory path + * @throws IOException if the RocksDB database cannot be opened + */ + public RocksDBArchiveStorage(File dbPath) throws IOException { + this(dbPath, new Configuration()); + } + + /** + * Creates a new {@link RocksDBArchiveStorage} instance. + * + * @param dbPath the RocksDB database directory path + * @param config the configuration used to read RocksDB related options (see {@link + * HistoryServerOptions}) + * @throws IOException if the RocksDB native library cannot be loaded or the database cannot be + * opened + */ + public RocksDBArchiveStorage(File dbPath, ReadableConfig config) throws IOException { + checkNotNull(dbPath, "dbPath cannot be null"); + checkNotNull(config, "config cannot be null"); + this.handlesToClose = new ArrayList<>(); + String rocksDBNativeLibDir = + config.get(HistoryServerOptions.HISTORY_SERVER_ARCHIVE_ROCKSDB_NATIVE_LIB_DIR); + + try { + loadRocksDBLibrary(rocksDBNativeLibDir); + loadConfiguration(config); + this.db = RocksDB.open(dbOptions, dbPath.getAbsolutePath()); + handlesToClose.add(db); + } catch (Throwable t) { + throw new IOException("Failed to initialize RocksDBArchiveStorage", t); + } + } + + @Override + public boolean exists(String key) throws IOException { + try { + return db.get(key.getBytes(UTF_8)) != null; + } catch (RocksDBException e) { + LOG.warn("Failed to check existence of key: {}", key, e); + return false; + } + } + + @Nullable + @Override + public String get(String key) throws IOException { + try { + byte[] value = db.get(key.getBytes(UTF_8)); + if (value == null) { + return null; + } + return new String(value, UTF_8); + } catch (RocksDBException e) { + throw new IOException("Failed to get key: " + key, e); + } + } + + @Override + public void put(String key, String value) throws IOException { + try { + db.put(writeOptions, key.getBytes(UTF_8), value.getBytes(UTF_8)); + } catch (RocksDBException e) { + throw new IOException("Failed to put key: " + key, e); + } + } + + @Override + public void delete(String key) throws IOException { + try { + db.delete(writeOptions, key.getBytes(UTF_8)); + } catch (RocksDBException e) { + throw new IOException("Failed to delete key: " + key, e); + } + } + + @Override + public void deletePrefix(String keyPrefix) throws IOException { + if (keyPrefix == null || keyPrefix.isEmpty()) { + return; + } Review Comment: ```suggestion if(StringUtils.isNullOrWhitespaceOnly(keyPrefix)) return; ``` -- This is an automated message from the Apache Git Service. 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