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 com.alibaba.jstorm.container.cgroup.core;
  
  import java.io.IOException;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  import com.alibaba.jstorm.container.CgroupUtils;
  import com.alibaba.jstorm.container.Constants;
  import com.alibaba.jstorm.container.SubSystemType;
  
  public class CpuacctCore implements CgroupCore {
  
      public static final String CPUACCT_USAGE = "/cpuacct.usage";
      public static final String CPUACCT_STAT = "/cpuacct.stat";
      public static final String CPUACCT_USAGE_PERCPU = "/cpuacct.usage_percpu";
  
      private final String dir;
  
      public CpuacctCore(String dir) {
          this.dir = dir;
      }
  
      @Override
      public SubSystemType getType() {
          return SubSystemType.cpuacct;
      }
  
      public Long getCpuUsage() throws IOException {
          return Long.parseLong(CgroupUtils.readFileByLine(Constants.getDir(this.dir, CPUACCT_USAGE)).get(0));
      }
  
      public Map<StatType, Long> getCpuStat() throws IOException {
          List<String> strs = CgroupUtils.readFileByLine(Constants.getDir(this.dir, CPUACCT_STAT));
          Map<StatType, Long> result = new HashMap<>();
          result.put(StatType.user, Long.parseLong(strs.get(0).split(" ")[1]));
          result.put(StatType.system, Long.parseLong(strs.get(1).split(" ")[1]));
          return result;
      }
  
      public Long[] getPerCpuUsage() throws IOException {
          String str = CgroupUtils.readFileByLine(Constants.getDir(this.dir, CPUACCT_USAGE_PERCPU)).get(0);
          String[] strArgs = str.split(" ");
          Long[] result = new Long[strArgs.length];
          for (int i = 0; i < result.length; i++) {
              result[i] = Long.parseLong(strArgs[i]);
          }
          return result;
      }
  
      public enum StatType {
          user, system;
      }
  
  }
  