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.metrics.os.windows;
  
  import com.alibaba.metrics.CachedMetricSet;
  import com.alibaba.metrics.Clock;
  import com.alibaba.metrics.Metric;
  import com.alibaba.metrics.MetricName;
  import com.alibaba.metrics.PersistentGauge;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.util.HashMap;
  import java.util.Map;
  import java.util.concurrent.TimeUnit;
  
  public class TcpGaugeSet extends CachedMetricSet{
  
      private static final Logger logger = LoggerFactory.getLogger(TcpGaugeSet.class);
  
      private Map<MetricName, Metric> gauges = new HashMap<MetricName, Metric>();
  
      private static final String[] METRICS = {
              "tcp.active_opens",   // active opening connections
              "tcp.passive_opens",  // passive opening connections
              "tcp.attempt_fails",  // number of failed connection attempts
              "tcp.estab_resets",   // number of resets that have occurred at ESTABLISHED
              "tcp.in_segs",        // incoming segments
              "tcp.out_segs",       // outgoing segments
              "tcp.retran_segs",    // number of retran segements
              "tcp.in_errs",        // incoming segments with errs, e.g. checksum error
              "tcp.out_rsts",       // outgoing segments with resets
      };
  
      /**
       * Number of connections that is in ESTABLISHED state, which is a gauge value
       */
      private static final String CURRENT_ESTAB = "tcp.current_estab";
      /**
       * The ratio of retran segments and outgoing segments
       */
      private static final String RETRAN_RATIO = "tcp.retran_ratio";
  
      /**
       * The counters of the metrics
       */
      private long[] counters;
  
      /**
       * The rate of the counters, e.g. active open connections per seconds
       */
      private double[] rates;
  
      /**
       * The number of tcp connections that is in established state.
       * Note that this data is not a counter
       */
      private long currentEstab;
  
      /**
       * retranRatio = (RetransSegs－last RetransSegs) ／ (OutSegs－last OutSegs)
       */
      private double retranRatio;
  
      /**
       * Whether it is the first collection or not, if true, rate will be calculated as 0.
       */
      private boolean firstCollection;
  
      public TcpGaugeSet(long dataTTL, TimeUnit unit, Clock clock) {
  
          super(dataTTL, unit, clock);
          this.counters = new long[METRICS.length];
          this.rates = new double[METRICS.length];
          this.gauges = new HashMap<MetricName, Metric>();
          this.firstCollection = true;
          populateGauges();
  
      }
  
      @Override
      public Map<MetricName, Metric> getMetrics() {
          return gauges;
      }
  
      @Override
      protected void getValueInternal() {
  
  //        String[] lst = sigar.getNetInterfaceList();
  //        NetInterfaceStat netStat;
  //
  //        if (lst != null && lst.length > 2){
  //            netStat = sigar.getNetInterfaceStat(lst[1]);
  //        }
  
  //        netStat.get
  //
  //        netInfoList.add(new SigarInfoEntity(nIfStat.getRxPackets() + "",
  //                "接收的总包裹数" + i));
  //        netInfoList.add(new SigarInfoEntity(nIfStat.getTxPackets() + "",
  //                "发送的总包裹数" + i));
  //        netInfoList.add(new SigarInfoEntity(nIfStat.getRxBytes() + "",
  //                "接收到的总字节数" + i));
  //        netInfoList.add(new SigarInfoEntity(nIfStat.getTxBytes() + "",
  //                "发送的总字节数" + i));
  //        netInfoList.add(new SigarInfoEntity(nIfStat.getRxErrors() + "",
  //                "接收到的错误包数" + i));
  //        netInfoList.add(new SigarInfoEntity(nIfStat.getTxErrors() + "",
  //                "发送数据包时的错误数" + i));
  //        netInfoList.add(new SigarInfoEntity(nIfStat.getRxDropped() + "",
  //                "接收时丢弃的包数" + i));
  //        netInfoList.add(new SigarInfoEntity(nIfStat.getTxDropped() + "",
  //                "发送时丢弃的包数" + i));
  //
  //        long[] counts = {
  //                Long.parseLong(tokens[5]),  // tcp.active_opens
  //                Long.parseLong(tokens[6]),  // tcp.passive_opens
  //                Long.parseLong(tokens[7]),  // tcp.attempt_fails
  //                Long.parseLong(tokens[8]),  // tcp.estab_resets
  //                Long.parseLong(tokens[10]), // tcp.in_segs
  //                Long.parseLong(tokens[11]), // tcp.out_segs
  //                Long.parseLong(tokens[12]), // tcp.retran_segs
  //                Long.parseLong(tokens[13]), // tcp.in_errs
  //                Long.parseLong(tokens[14]), // tcp.out_rsts
  //            };
  
      }
  
      private void populateGauges() {
          for (int i = 0; i < METRICS.length; i++) {
              gauges.put(MetricName.build(METRICS[i]), new TcpGauge(i));
          }
          // add tcp.current_estab
          gauges.put(MetricName.build(CURRENT_ESTAB), new PersistentGauge<Long>() {
              @Override
              public Long getValue() {
                  return currentEstab;
              }
          });
          // add tcp.retran_ratio
          gauges.put(MetricName.build(RETRAN_RATIO), new PersistentGauge<Double>() {
              @Override
              public Double getValue() {
                  return retranRatio;
              }
          });
      }
  
      private class TcpGauge extends PersistentGauge<Double> {
  
          private int index;
  
          public TcpGauge(int index) {
              this.index = index;
          }
  
          @Override
          public Double getValue() {
              try {
                  refreshIfNecessary();
                  return rates[index];
              } catch (Exception e) {
                  return 0.0d;
              }
          }
      }
  }
  