content: /*
   * Copyright 1999-2018 Alibaba Group Holding Ltd.
   *
   * Licensed 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.alibaba.nacos.core.distributed.raft.utils;
  
  import com.alibaba.nacos.common.executor.ExecutorFactory;
  import com.alibaba.nacos.common.executor.NameThreadFactory;
  import com.alibaba.nacos.core.distributed.raft.JRaftServer;
  import com.alibaba.nacos.core.distributed.raft.RaftConfig;
  import com.alibaba.nacos.core.distributed.raft.RaftSysConstants;
  import com.alibaba.nacos.core.utils.ClassUtils;
  
  import java.util.concurrent.ExecutorService;
  import java.util.concurrent.ScheduledExecutorService;
  import java.util.concurrent.TimeUnit;
  
  /**
   * raft executor.
   *
   * @author <a href="mailto:liaochuntao@live.com">liaochuntao</a>
   */
  public final class RaftExecutor {
      
      private static ExecutorService raftCoreExecutor;
      
      private static ExecutorService raftCliServiceExecutor;
      
      private static ScheduledExecutorService raftCommonExecutor;
      
      private static ExecutorService raftSnapshotExecutor;
      
      private static final String OWNER = ClassUtils.getCanonicalName(JRaftServer.class);
      
      private RaftExecutor() {
      }
      
      /**
       * init raft executor by {@link RaftConfig}.
       *
       * @param config {@link RaftConfig}
       */
      public static void init(RaftConfig config) {
          
          int raftCoreThreadNum = Integer.parseInt(config.getValOfDefault(RaftSysConstants.RAFT_CORE_THREAD_NUM, "8"));
          int raftCliServiceThreadNum = Integer
                  .parseInt(config.getValOfDefault(RaftSysConstants.RAFT_CLI_SERVICE_THREAD_NUM, "4"));
          
          raftCoreExecutor = ExecutorFactory.Managed.newFixedExecutorService(OWNER, raftCoreThreadNum,
                  new NameThreadFactory("com.alibaba.nacos.core.raft-core"));
          
          raftCliServiceExecutor = ExecutorFactory.Managed.newFixedExecutorService(OWNER, raftCliServiceThreadNum,
                  new NameThreadFactory("com.alibaba.nacos.core.raft-cli-service"));
          
          raftCommonExecutor = ExecutorFactory.Managed.newScheduledExecutorService(OWNER, 8,
                  new NameThreadFactory("com.alibaba.nacos.core.protocol.raft-common"));
          
          int snapshotNum = raftCoreThreadNum / 2;
          snapshotNum = snapshotNum == 0 ? raftCoreThreadNum : snapshotNum;
          
          raftSnapshotExecutor = ExecutorFactory.Managed.newFixedExecutorService(OWNER, snapshotNum,
                          new NameThreadFactory("com.alibaba.nacos.core.raft-snapshot"));
          
      }
      
      public static void scheduleRaftMemberRefreshJob(Runnable runnable, long initialDelay, long period, TimeUnit unit) {
          raftCommonExecutor.scheduleAtFixedRate(runnable, initialDelay, period, unit);
      }
      
      public static ExecutorService getRaftCoreExecutor() {
          return raftCoreExecutor;
      }
      
      public static ExecutorService getRaftCliServiceExecutor() {
          return raftCliServiceExecutor;
      }
      
      public static void executeByCommon(Runnable r) {
          raftCommonExecutor.execute(r);
      }
      
      public static void scheduleByCommon(Runnable r, long delayMs) {
          raftCommonExecutor.schedule(r, delayMs, TimeUnit.MILLISECONDS);
      }
      
      public static void scheduleAtFixedRateByCommon(Runnable command, long initialDelayMs, long periodMs) {
          raftCommonExecutor.scheduleAtFixedRate(command, initialDelayMs, periodMs, TimeUnit.MILLISECONDS);
      }
      
      public static ScheduledExecutorService getRaftCommonExecutor() {
          return raftCommonExecutor;
      }
      
      public static void doSnapshot(Runnable runnable) {
          raftSnapshotExecutor.execute(runnable);
      }
      
  }
  