| /* |
| * 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.ratis.server.raftlog; |
| |
| import org.apache.ratis.proto.RaftProtos.LogEntryProto; |
| import org.apache.ratis.proto.RaftProtos.LogEntryProto.LogEntryBodyCase; |
| import org.apache.ratis.server.protocol.TermIndex; |
| |
| import java.util.Comparator; |
| |
| /** The header of a {@link LogEntryProto} including {@link TermIndex} and {@link LogEntryBodyCase}. */ |
| public interface LogEntryHeader extends Comparable<LogEntryHeader> { |
| LogEntryHeader[] EMPTY_ARRAY = {}; |
| |
| /** @return the {@link TermIndex}. */ |
| TermIndex getTermIndex(); |
| |
| default long getTerm() { |
| return getTermIndex().getTerm(); |
| } |
| |
| default long getIndex() { |
| return getTermIndex().getIndex(); |
| } |
| |
| /** @return the {@link LogEntryBodyCase}. */ |
| LogEntryBodyCase getLogEntryBodyCase(); |
| |
| static LogEntryHeader valueOf(LogEntryProto entry) { |
| return valueOf(TermIndex.valueOf(entry), entry.getLogEntryBodyCase()); |
| } |
| |
| static LogEntryHeader valueOf(TermIndex ti, LogEntryBodyCase logEntryBodyCase) { |
| return new LogEntryHeader() { |
| @Override |
| public TermIndex getTermIndex() { |
| return ti; |
| } |
| |
| @Override |
| public LogEntryBodyCase getLogEntryBodyCase() { |
| return logEntryBodyCase; |
| } |
| |
| @Override |
| public int compareTo(LogEntryHeader that) { |
| return Comparator.comparing(LogEntryHeader::getTermIndex) |
| .thenComparing(LogEntryHeader::getLogEntryBodyCase) |
| .compare(this, that); |
| } |
| |
| @Override |
| public int hashCode() { |
| return ti.hashCode(); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (obj == this) { |
| return true; |
| } else if (!(obj instanceof LogEntryHeader)) { |
| return false; |
| } |
| |
| final LogEntryHeader that = (LogEntryHeader) obj; |
| return this.getLogEntryBodyCase() == that.getLogEntryBodyCase() |
| && this.getTermIndex().equals(that.getTermIndex()); |
| } |
| }; |
| } |
| } |