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.List;
  
  import com.alibaba.jstorm.container.CgroupUtils;
  import com.alibaba.jstorm.container.Constants;
  import com.alibaba.jstorm.container.SubSystemType;
  
  public class CpuCore implements CgroupCore {
  
      public static final String CPU_SHARES = "/cpu.shares";
      public static final String CPU_RT_RUNTIME_US = "/cpu.rt_runtime_us";
      public static final String CPU_RT_PERIOD_US = "/cpu.rt_period_us";
      public static final String CPU_CFS_PERIOD_US = "/cpu.cfs_period_us";
      public static final String CPU_CFS_QUOTA_US = "/cpu.cfs_quota_us";
      public static final String CPU_STAT = "/cpu.stat";
  
      private final String dir;
  
      public CpuCore(String dir) {
          this.dir = dir;
      }
  
      @Override
      public SubSystemType getType() {
          return SubSystemType.cpu;
      }
  
      public void setCpuShares(int weight) throws IOException {
          CgroupUtils.writeFileByLine(Constants.getDir(this.dir, CPU_SHARES), String.valueOf(weight));
      }
  
      public int getCpuShares() throws IOException {
          return Integer.parseInt(CgroupUtils.readFileByLine(Constants.getDir(this.dir, CPU_SHARES)).get(0));
      }
  
      public void setCpuRtRuntimeUs(long us) throws IOException {
          CgroupUtils.writeFileByLine(Constants.getDir(this.dir, CPU_RT_RUNTIME_US), String.valueOf(us));
      }
  
      public long getCpuRtRuntimeUs() throws IOException {
          return Long.parseLong(CgroupUtils.readFileByLine(Constants.getDir(this.dir, CPU_RT_RUNTIME_US)).get(0));
      }
  
      public void setCpuRtPeriodUs(long us) throws IOException {
          CgroupUtils.writeFileByLine(Constants.getDir(this.dir, CPU_RT_PERIOD_US), String.valueOf(us));
      }
  
      public Long getCpuRtPeriodUs() throws IOException {
          return Long.parseLong(CgroupUtils.readFileByLine(Constants.getDir(this.dir, CPU_RT_PERIOD_US)).get(0));
      }
  
      public void setCpuCfsPeriodUs(long us) throws IOException {
          CgroupUtils.writeFileByLine(Constants.getDir(this.dir, CPU_CFS_PERIOD_US), String.valueOf(us));
      }
  
      public Long getCpuCfsPeriodUs(long us) throws IOException {
          return Long.parseLong(CgroupUtils.readFileByLine(Constants.getDir(this.dir, CPU_CFS_PERIOD_US)).get(0));
      }
  
      public void setCpuCfsQuotaUs(long us) throws IOException {
          CgroupUtils.writeFileByLine(Constants.getDir(this.dir, CPU_CFS_QUOTA_US), String.valueOf(us));
      }
  
      public Long getCpuCfsQuotaUs(long us) throws IOException {
          return Long.parseLong(CgroupUtils.readFileByLine(Constants.getDir(this.dir, CPU_CFS_QUOTA_US)).get(0));
      }
  
      public Stat getCpuStat() throws IOException {
          return new Stat(CgroupUtils.readFileByLine(Constants.getDir(this.dir, CPU_STAT)));
      }
  
      public static class Stat {
          public final int nrPeriods;
          public final int nrThrottled;
          public final int throttledTime;
  
          public Stat(List<String> statStr) {
              this.nrPeriods = Integer.parseInt(statStr.get(0).split(" ")[1]);
              this.nrThrottled = Integer.parseInt(statStr.get(1).split(" ")[1]);
              this.throttledTime = Integer.parseInt(statStr.get(2).split(" ")[1]);
          }
  
          @Override
          public int hashCode() {
              final int prime = 31;
              int result = 1;
              result = prime * result + nrPeriods;
              result = prime * result + nrThrottled;
              result = prime * result + throttledTime;
              return result;
          }
  
          @Override
          public boolean equals(Object obj) {
              if (this == obj)
                  return true;
              if (obj == null)
                  return false;
              if (getClass() != obj.getClass())
                  return false;
              Stat other = (Stat) obj;
              if (nrPeriods != other.nrPeriods)
                  return false;
              if (nrThrottled != other.nrThrottled)
                  return false;
              if (throttledTime != other.throttledTime)
                  return false;
              return true;
          }
  
      }
  
  }
  