| /* |
| * 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.bookkeeper.statelib.impl.kv; |
| |
| import static org.apache.bookkeeper.statelib.impl.kv.KVUtils.newCommand; |
| |
| import com.google.protobuf.InvalidProtocolBufferException; |
| import io.netty.buffer.ByteBuf; |
| import io.netty.buffer.ByteBufUtil; |
| import lombok.AccessLevel; |
| import lombok.Cleanup; |
| import lombok.NoArgsConstructor; |
| import lombok.extern.slf4j.Slf4j; |
| import org.apache.bookkeeper.proto.statestore.kv.Command; |
| import org.apache.bookkeeper.proto.statestore.kv.DeleteRequest; |
| import org.apache.bookkeeper.proto.statestore.kv.PutRequest; |
| import org.apache.bookkeeper.statelib.impl.journal.CommandProcessor; |
| |
| /** |
| * A command processor to apply commands happened to the kv state store. |
| */ |
| @Slf4j |
| @NoArgsConstructor(access = AccessLevel.PRIVATE) |
| class KVCommandProcessor implements CommandProcessor<RocksdbKVStore<byte[], byte[]>> { |
| |
| public static KVCommandProcessor of() { |
| return new KVCommandProcessor(); |
| } |
| |
| @Override |
| public void applyCommand(long revision, ByteBuf cmdBuf, RocksdbKVStore<byte[], byte[]> store) { |
| Command command; |
| try { |
| command = newCommand(cmdBuf); |
| } catch (InvalidProtocolBufferException e) { |
| log.error("Invalid kv command found : buffer = {}, txid = {}", cmdBuf, revision); |
| // TODO: better to handle this |
| return; |
| } |
| |
| switch (command.getReqCase()) { |
| case NOP_REQ: |
| break; |
| case PUT_IF_ABSENT_REQ: |
| applyPutIfAbsentCommand(revision, command, store); |
| return; |
| case PUT_REQ: |
| applyPutCommand(revision, command, store); |
| return; |
| case DEL_REQ: |
| applyDeleteCommand(revision, command, store); |
| return; |
| default: |
| return; |
| } |
| } |
| |
| private void applyPutCommand(long revision, Command command, RocksdbKVStore<byte[], byte[]> store) { |
| PutRequest putReq = command.getPutReq(); |
| byte[] keyBytes = putReq.getKey().toByteArray(); |
| byte[] valBytes = putReq.getValue().toByteArray(); |
| @Cleanup("release") ByteBuf serializedValBuf = KVUtils.serialize(valBytes, revision); |
| byte[] serializedValBytes = ByteBufUtil.getBytes(serializedValBuf); |
| store.put(keyBytes, serializedValBytes, revision); |
| } |
| |
| private void applyPutIfAbsentCommand(long revision, Command command, RocksdbKVStore<byte[], byte[]> store) { |
| PutRequest putReq = command.getPutReq(); |
| byte[] keyBytes = putReq.getKey().toByteArray(); |
| byte[] valBytes = putReq.getValue().toByteArray(); |
| @Cleanup("release") ByteBuf serializedValBuf = KVUtils.serialize(valBytes, revision); |
| byte[] serializedValBytes = ByteBufUtil.getBytes(serializedValBuf); |
| store.putIfAbsent(keyBytes, serializedValBytes, revision); |
| } |
| |
| private void applyDeleteCommand(long revision, Command command, RocksdbKVStore<byte[], byte[]> store) { |
| DeleteRequest delReq = command.getDelReq(); |
| byte[] keyBytes = delReq.getKey().toByteArray(); |
| store.delete(keyBytes, revision); |
| } |
| } |