fe/src/test/java/org/apache/impala/testutil/CountingQueryEventHook.java

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// 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,
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package org.apache.impala.testutil;

import org.apache.impala.hooks.QueryCompleteContext;
import org.apache.impala.hooks.QueryEventHook;

import java.util.concurrent.atomic.AtomicInteger;

public class CountingQueryEventHook implements QueryEventHook {
  private final AtomicInteger startupCount = new AtomicInteger(0);
  private final AtomicInteger postQueryCount = new AtomicInteger(0);

  @Override
  public void onImpalaStartup() {
    startupCount.incrementAndGet();
  }

  @Override
  public void onQueryComplete(QueryCompleteContext context) {
    postQueryCount.incrementAndGet();
  }

  /**
   * @return # of times postQueryExecute has been invoked since construction
   */
  public int getImpalaStartupInvocations() {
    return startupCount.get();
  }

  /**
   * @return # of times postQueryExecute has been invoked since construction
   */
  public int getPostQueryExecuteInvocations() {
    return postQueryCount.get();
  }
}