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 NetPrioCore implements CgroupCore {
  
      public static final String NET_PRIO_PRIOIDX = "/net_prio.prioidx";
      public static final String NET_PRIO_IFPRIOMAP = "/net_prio.ifpriomap";
  
      private final String dir;
  
      public NetPrioCore(String dir) {
          this.dir = dir;
      }
  
      @Override
      public SubSystemType getType() {
          return SubSystemType.net_prio;
      }
  
      public int getPrioId() throws IOException {
          return Integer.parseInt(CgroupUtils.readFileByLine(Constants.getDir(this.dir, NET_PRIO_PRIOIDX)).get(0));
      }
  
      public void setIfPrioMap(String iface, int priority) throws IOException {
          StringBuilder sb = new StringBuilder();
          sb.append(iface);
          sb.append(' ');
          sb.append(priority);
          CgroupUtils.writeFileByLine(Constants.getDir(this.dir, NET_PRIO_IFPRIOMAP), sb.toString());
      }
  
      public Map<String, Integer> getIfPrioMap() throws IOException {
          Map<String, Integer> result = new HashMap<>();
          List<String> strs = CgroupUtils.readFileByLine(Constants.getDir(this.dir, NET_PRIO_IFPRIOMAP));
          for (String str : strs) {
              String[] strArgs = str.split(" ");
              result.put(strArgs[0], Integer.valueOf(strArgs[1]));
          }
          return result;
      }
  
  }
  