/*
 * Copyright DataStax, Inc.
 *
 * Licensed 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.datastax.oss.driver.api.core.cql;

import edu.umd.cs.findbugs.annotations.Nullable;
import java.net.InetAddress;

An event in a QueryTrace. /** An event in a {@link QueryTrace}. */
public interface TraceEvent {

  
Which activity this event corresponds to. /** Which activity this event corresponds to. */
  @Nullable
  String getActivity();

  
The server-side timestamp of the event. /** The server-side timestamp of the event. */
  long getTimestamp();

  
The IP of the host having generated this event. /** The IP of the host having generated this event. */
  @Nullable
  InetAddress getSource();

  
The number of microseconds elapsed on the source when this event occurred since the moment when
the source started handling the query.
/**
   * The number of microseconds elapsed on the source when this event occurred since the moment when
   * the source started handling the query.
   */
  int getSourceElapsedMicros();

  
The name of the thread on which this event occurred. /** The name of the thread on which this event occurred. */
  @Nullable
  String getThreadName();
}