content: /*
   * 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.bifromq.basekv.raft;
  
  import org.apache.bifromq.basekv.raft.proto.RaftNodeSyncState;
  import org.slf4j.Logger;
  
  final class PeerLogReplicator implements IPeerLogReplicator {
      private PeerLogReplicatorState state;
  
      PeerLogReplicator(String peerId, RaftConfig config, IRaftStateStore stateStorage, Logger logger) {
          this.state = new PeerLogReplicatorStateProbing(peerId, config, stateStorage, logger);
      }
  
      @Override
      public long matchIndex() {
          return this.state.matchIndex();
      }
  
      @Override
      public long nextIndex() {
          return this.state.nextIndex();
      }
  
      @Override
      public RaftNodeSyncState status() {
          return this.state.state();
      }
  
      @Override
      public boolean tick() {
          PeerLogReplicatorState newState = this.state.tick();
          if (this.state != newState) {
              this.state = newState;
              return true;
          }
          return false;
      }
  
      @Override
      public long catchupRate() {
          return this.state.catchupRate();
      }
  
      @Override
      public boolean pauseReplicating() {
          return this.state.pauseReplicating();
      }
  
      @Override
      public boolean needHeartbeat() {
          return this.state.needHeartbeat();
      }
  
      @Override
      public boolean backoff(long peerRejectedIndex, long peerLastIndex) {
          PeerLogReplicatorState newState = this.state.backoff(peerRejectedIndex, peerLastIndex);
          if (this.state != newState) {
              this.state = newState;
              return true;
          }
          return false;
      }
  
      @Override
      public boolean confirmMatch(long peerLastIndex) {
          PeerLogReplicatorState newState = this.state.confirmMatch(peerLastIndex);
          if (this.state != newState) {
              this.state = newState;
              return true;
          }
          return false;
      }
  
      @Override
      public boolean replicateBy(long endIndex) {
          PeerLogReplicatorState newState = this.state.replicateTo(endIndex);
          if (this.state != newState) {
              this.state = newState;
              return true;
          }
          return false;
      }
  }
  