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;
  import com.alibaba.jstorm.container.cgroup.Device;
  
  public class BlkioCore implements CgroupCore {
  
      public static final String BLKIO_WEIGHT = "/blkio.weight";
      public static final String BLKIO_WEIGHT_DEVICE = "/blkio.weight_device";
      public static final String BLKIO_RESET_STATS = "/blkio.reset_stats";
  
      public static final String BLKIO_THROTTLE_READ_BPS_DEVICE = "/blkio.throttle.read_bps_device";
      public static final String BLKIO_THROTTLE_WRITE_BPS_DEVICE = "/blkio.throttle.write_bps_device";
      public static final String BLKIO_THROTTLE_READ_IOPS_DEVICE = "/blkio.throttle.read_iops_device";
      public static final String BLKIO_THROTTLE_WRITE_IOPS_DEVICE = "/blkio.throttle.write_iops_device";
  
      public static final String BLKIO_THROTTLE_IO_SERVICED = "/blkio.throttle.io_serviced";
      public static final String BLKIO_THROTTLE_IO_SERVICE_BYTES = "/blkio.throttle.io_service_bytes";
  
      public static final String BLKIO_TIME = "/blkio.time";
      public static final String BLKIO_SECTORS = "/blkio.sectors";
      public static final String BLKIO_IO_SERVICED = "/blkio.io_serviced";
      public static final String BLKIO_IO_SERVICE_BYTES = "/blkio.io_service_bytes";
      public static final String BLKIO_IO_SERVICE_TIME = "/blkio.io_service_time";
      public static final String BLKIO_IO_WAIT_TIME = "/blkio.io_wait_time";
      public static final String BLKIO_IO_MERGED = "/blkio.io_merged";
      public static final String BLKIO_IO_QUEUED = "/blkio.io_queued";
  
      private final String dir;
  
      public BlkioCore(String dir) {
          this.dir = dir;
      }
  
      @Override
      public SubSystemType getType() {
          return SubSystemType.blkio;
      }
  
      /* weight: 100-1000 */
      public void setBlkioWeight(int weight) throws IOException {
          CgroupUtils.writeFileByLine(Constants.getDir(this.dir, BLKIO_WEIGHT), String.valueOf(weight));
      }
  
      public int getBlkioWeight() throws IOException {
          return Integer.valueOf(CgroupUtils.readFileByLine(Constants.getDir(this.dir, BLKIO_WEIGHT)).get(0));
      }
  
      public void setBlkioWeightDevice(Device device, int weight) throws IOException {
          CgroupUtils.writeFileByLine(Constants.getDir(this.dir, BLKIO_WEIGHT_DEVICE), makeContext(device, weight));
      }
  
      public Map<Device, Integer> getBlkioWeightDevice() throws IOException {
          List<String> strings = CgroupUtils.readFileByLine(Constants.getDir(this.dir, BLKIO_WEIGHT_DEVICE));
          Map<Device, Integer> result = new HashMap<>();
          for (String string : strings) {
              String[] strArgs = string.split(" ");
              Device device = new Device(strArgs[0]);
              Integer weight = Integer.valueOf(strArgs[1]);
              result.put(device, weight);
          }
          return result;
      }
  
      public void setReadBps(Device device, long bps) throws IOException {
          CgroupUtils.writeFileByLine(Constants.getDir(this.dir, BLKIO_THROTTLE_READ_BPS_DEVICE), makeContext(device, bps));
      }
  
      public Map<Device, Long> getReadBps() throws IOException {
          List<String> strings = CgroupUtils.readFileByLine(Constants.getDir(this.dir, BLKIO_THROTTLE_READ_BPS_DEVICE));
          Map<Device, Long> result = new HashMap<>();
          for (String string : strings) {
              String[] strArgs = string.split(" ");
              Device device = new Device(strArgs[0]);
              Long bps = Long.valueOf(strArgs[1]);
              result.put(device, bps);
          }
          return result;
      }
  
      public void setWriteBps(Device device, long bps) throws IOException {
          CgroupUtils.writeFileByLine(Constants.getDir(this.dir, BLKIO_THROTTLE_WRITE_BPS_DEVICE), makeContext(device, bps));
      }
  
      public Map<Device, Long> getWriteBps() throws IOException {
          List<String> strings = CgroupUtils.readFileByLine(Constants.getDir(this.dir, BLKIO_THROTTLE_WRITE_BPS_DEVICE));
          Map<Device, Long> result = new HashMap<>();
          for (String string : strings) {
              String[] strArgs = string.split(" ");
              Device device = new Device(strArgs[0]);
              Long bps = Long.valueOf(strArgs[1]);
              result.put(device, bps);
          }
          return result;
      }
  
      public void setReadIOps(Device device, long iops) throws IOException {
          CgroupUtils.writeFileByLine(Constants.getDir(this.dir, BLKIO_THROTTLE_READ_IOPS_DEVICE), makeContext(device, iops));
      }
  
      public Map<Device, Long> getReadIOps() throws IOException {
          List<String> strings = CgroupUtils.readFileByLine(Constants.getDir(this.dir, BLKIO_THROTTLE_READ_IOPS_DEVICE));
          Map<Device, Long> result = new HashMap<>();
          for (String string : strings) {
              String[] strArgs = string.split(" ");
              Device device = new Device(strArgs[0]);
              Long iops = Long.valueOf(strArgs[1]);
              result.put(device, iops);
          }
          return result;
      }
  
      public void setWriteIOps(Device device, long iops) throws IOException {
          CgroupUtils.writeFileByLine(Constants.getDir(this.dir, BLKIO_THROTTLE_WRITE_IOPS_DEVICE), makeContext(device, iops));
      }
  
      public Map<Device, Long> getWriteIOps() throws IOException {
          List<String> strings = CgroupUtils.readFileByLine(Constants.getDir(this.dir, BLKIO_THROTTLE_WRITE_IOPS_DEVICE));
          Map<Device, Long> result = new HashMap<>();
          for (String string : strings) {
              String[] strArgs = string.split(" ");
              Device device = new Device(strArgs[0]);
              Long iops = Long.valueOf(strArgs[1]);
              result.put(device, iops);
          }
          return result;
      }
  
      public Map<Device, Map<RecordType, Long>> getThrottleIOServiced() throws IOException {
          return this.analyseRecord(CgroupUtils.readFileByLine(Constants.getDir(this.dir, BLKIO_THROTTLE_IO_SERVICED)));
      }
  
      public Map<Device, Map<RecordType, Long>> getThrottleIOServiceByte() throws IOException {
          return this.analyseRecord(CgroupUtils.readFileByLine(Constants.getDir(this.dir, BLKIO_THROTTLE_IO_SERVICE_BYTES)));
      }
  
      public Map<Device, Long> getBlkioTime() throws IOException {
          Map<Device, Long> result = new HashMap<>();
          List<String> strs = CgroupUtils.readFileByLine(Constants.getDir(this.dir, BLKIO_TIME));
          for (String str : strs) {
              String[] strArgs = str.split(" ");
              result.put(new Device(strArgs[0]), Long.parseLong(strArgs[1]));
          }
          return result;
      }
  
      public Map<Device, Long> getBlkioSectors() throws IOException {
          Map<Device, Long> result = new HashMap<>();
          List<String> strs = CgroupUtils.readFileByLine(Constants.getDir(this.dir, BLKIO_SECTORS));
          for (String str : strs) {
              String[] strArgs = str.split(" ");
              result.put(new Device(strArgs[0]), Long.parseLong(strArgs[1]));
          }
          return result;
      }
  
      public Map<Device, Map<RecordType, Long>> getIOServiced() throws IOException {
          return this.analyseRecord(CgroupUtils.readFileByLine(Constants.getDir(this.dir, BLKIO_IO_SERVICED)));
      }
  
      public Map<Device, Map<RecordType, Long>> getIOServiceBytes() throws IOException {
          return this.analyseRecord(CgroupUtils.readFileByLine(Constants.getDir(this.dir, BLKIO_IO_SERVICE_BYTES)));
      }
  
      public Map<Device, Map<RecordType, Long>> getIOServiceTime() throws IOException {
          return this.analyseRecord(CgroupUtils.readFileByLine(Constants.getDir(this.dir, BLKIO_IO_SERVICE_TIME)));
      }
  
      public Map<Device, Map<RecordType, Long>> getIOWaitTime() throws IOException {
          return this.analyseRecord(CgroupUtils.readFileByLine(Constants.getDir(this.dir, BLKIO_IO_WAIT_TIME)));
      }
  
      public Map<Device, Map<RecordType, Long>> getIOMerged() throws IOException {
          return this.analyseRecord(CgroupUtils.readFileByLine(Constants.getDir(this.dir, BLKIO_IO_MERGED)));
      }
  
      public Map<Device, Map<RecordType, Long>> getIOQueued() throws IOException {
          return this.analyseRecord(CgroupUtils.readFileByLine(Constants.getDir(this.dir, BLKIO_IO_QUEUED)));
      }
  
      public void resetStats() throws IOException {
          CgroupUtils.writeFileByLine(Constants.getDir(this.dir, BLKIO_RESET_STATS), "1");
      }
  
      private String makeContext(Device device, Object data) {
          StringBuilder sb = new StringBuilder();
          sb.append(device.toString()).append(" ").append(data);
          return sb.toString();
      }
  
      private Map<Device, Map<RecordType, Long>> analyseRecord(List<String> strs) {
          Map<Device, Map<RecordType, Long>> result = new HashMap<>();
          for (String str : strs) {
              String[] strArgs = str.split(" ");
              if (strArgs.length != 3)
                  continue;
              Device device = new Device(strArgs[0]);
              RecordType key = RecordType.getType(strArgs[1]);
              Long value = Long.parseLong(strArgs[2]);
              Map<RecordType, Long> record = result.get(device);
              if (record == null) {
                  record = new HashMap<>();
                  result.put(device, record);
              }
              record.put(key, value);
          }
          return result;
      }
  
      public enum RecordType {
          read, write, sync, async, total;
  
          public static RecordType getType(String type) {
              if (type.equals("Read"))
                  return read;
              else if (type.equals("Write"))
                  return write;
              else if (type.equals("Sync"))
                  return sync;
              else if (type.equals("Async"))
                  return async;
              else if (type.equals("Total"))
                  return total;
              else
                  return null;
          }
      }
  
  }
  