storm-compatibility/src/java/backtype/storm/metric/api/IMetricsConsumer.java

/**
 * 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
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * 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 backtype.storm.metric.api;

import java.util.Collection;
import java.util.Map;
import java.util.Objects;

import org.apache.storm.task.IErrorReporter;
import org.apache.storm.task.TopologyContext;

public interface IMetricsConsumer {
  class TaskInfo {
    public TaskInfo() {
    }

    public TaskInfo(String srcWorkerHost, int srcWorkerPort, String srcComponentId,
                    int srcTaskId, long timestamp, int updateIntervalSecs) {
      this.srcWorkerHost = srcWorkerHost;
      this.srcWorkerPort = srcWorkerPort;
      this.srcComponentId = srcComponentId;
      this.srcTaskId = srcTaskId;
      this.timestamp = timestamp;
      this.updateIntervalSecs = updateIntervalSecs;
    }

    public String srcWorkerHost;
    public int srcWorkerPort;
    public String srcComponentId;
    public int srcTaskId;
    public long timestamp;
    public int updateIntervalSecs;
  }

  // We can't move this to outside without breaking backward compatibility.
  class DataPoint {
    public DataPoint() {
    }

    public DataPoint(String name, Object value) {
      this.name = name;
      this.value = value;
    }

    @Override
    public String toString() {
      return "[" + name + " = " + value + "]";
    }

    public String name;
    public Object value;

    @Override
    public boolean equals(Object o) {
      if (this == o) {
        return true;
      }
      if (!(o instanceof DataPoint)) {
        return false;
      }

      DataPoint dataPoint = (DataPoint) o;

      return Objects.equals(name, dataPoint.name) && Objects.deepEquals(value, dataPoint.value);
    }

    @Override
    public int hashCode() {
      int result = name != null ? name.hashCode() : 0;
      result = 31 * result + (value != null ? value.hashCode() : 0);
      return result;
    }
  }

  @SuppressWarnings("rawtypes")
  void prepare(Map stormConf, Object registrationArgument,
               TopologyContext context, IErrorReporter errorReporter);

  void handleDataPoints(TaskInfo taskInfo, Collection<DataPoint> dataPoints);

  void cleanup();
}