text: /**
   * 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 org.lealone.bats.api;
  
  import java.io.Serializable;
  import java.util.ArrayList;
  import java.util.Map;
  
  /**
   * <p>Stats interface.</p>
   *
   * @since 0.9.1
   */
  public interface Stats extends Serializable
  {
    long INVALID_TIME_MILLIS = -1;
  
    interface Checkpoint extends Serializable
    {
      long getWindowId();
    }
  
    class CheckpointStats implements Stats
    {
      public long checkpointStartTime;
      public long checkpointTime;
  
      @Override
      public String toString()
      {
        return "CheckpointStats{" + "checkpointStartTime=" + checkpointStartTime + ", checkpointTime=" + checkpointTime + '}';
      }
    }
  
    class OperatorStats implements Stats
    {
      public long windowId;
      public Checkpoint checkpoint;
      public ArrayList<PortStats> inputPorts;
      public ArrayList<PortStats> outputPorts;
      public long cpuTimeUsed;
      public CheckpointStats checkpointStats;
      /**
       * @deprecated use {@link #metrics}
       */
      @Deprecated
      public Object counters;
      public Map<String, Object> metrics;
  
      /**
       * If there is a recording on the operator, this contains the recording id, otherwise null
       */
      public String recordingId;
  
      public static class PortStats implements Stats
      {
        private static final long serialVersionUID = 201309131906L;
        public final String id;
        public int tupleCount;
        public long endWindowTimestamp;
        public long bufferServerBytes;
        public int queueSize;
        /**
         * If there is a recording on the port, this contains the recording id, otherwise null
         */
        public String recordingId;
  
        public PortStats(String id)
        {
          this.id = id;
        }
  
        @Override
        public String toString()
        {
          return "PortStats{" + "portname=" + id + ", processedCount=" + tupleCount + ", bufferServerBytes = " + bufferServerBytes + ", queueSize = " + queueSize + ", endWindowTimestamp=" + endWindowTimestamp + '}';
        }
  
      }
  
      @Override
      public String toString()
      {
        return "OperatorStats{" + "windowId=" + windowId + ", checkpointedWindowId=" + checkpoint + ", inputPorts=" + inputPorts + ", outputPorts=" + outputPorts + ", cpuTimeUsed=" + cpuTimeUsed +
          ", checkpointStats=" + checkpointStats + '}';
      }
  
      private static final long serialVersionUID = 201309131905L;
    }
  
  }
  