| /** |
| * 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 com.twitter.distributedlog.bk; |
| |
| import com.google.common.base.Objects; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Configuration for quorums |
| */ |
| public class QuorumConfig { |
| |
| private static final Logger logger = LoggerFactory.getLogger(QuorumConfig.class); |
| |
| private final int ensembleSize; |
| private final int writeQuorumSize; |
| private final int ackQuorumSize; |
| |
| public QuorumConfig(int ensembleSize, |
| int writeQuorumSize, |
| int ackQuorumSize) { |
| this.ensembleSize = ensembleSize; |
| if (this.ensembleSize < writeQuorumSize) { |
| this.writeQuorumSize = this.ensembleSize; |
| logger.warn("Setting write quorum size {} greater than ensemble size {}", |
| writeQuorumSize, this.ensembleSize); |
| } else { |
| this.writeQuorumSize = writeQuorumSize; |
| } |
| if (this.writeQuorumSize < ackQuorumSize) { |
| this.ackQuorumSize = this.writeQuorumSize; |
| logger.warn("Setting write ack quorum size {} greater than write quorum size {}", |
| ackQuorumSize, this.writeQuorumSize); |
| } else { |
| this.ackQuorumSize = ackQuorumSize; |
| } |
| } |
| |
| public int getEnsembleSize() { |
| return ensembleSize; |
| } |
| |
| public int getWriteQuorumSize() { |
| return writeQuorumSize; |
| } |
| |
| public int getAckQuorumSize() { |
| return ackQuorumSize; |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hashCode(ensembleSize, writeQuorumSize, ackQuorumSize); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (!(obj instanceof QuorumConfig)) { |
| return false; |
| } |
| QuorumConfig other = (QuorumConfig) obj; |
| return ensembleSize == other.ensembleSize |
| && writeQuorumSize == other.writeQuorumSize |
| && ackQuorumSize == other.ackQuorumSize; |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder sb = new StringBuilder(); |
| sb.append("QuorumConfig[ensemble=") |
| .append(ensembleSize).append(", write quorum=") |
| .append(writeQuorumSize).append(", ack quorum=") |
| .append(ackQuorumSize).append("]"); |
| return sb.toString(); |
| } |
| } |