TestConnectionCache.java example

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/*
 *
 * 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
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package org.apache.hadoop.hbase.util;

import junit.framework.TestCase;
import org.apache.hadoop.hbase.HBaseTestingUtility;
import org.apache.hadoop.hbase.testclassification.MediumTests;
import org.apache.hadoop.hbase.testclassification.MiscTests;
import org.apache.hadoop.hbase.security.UserProvider;
import org.junit.Test;
import org.junit.experimental.categories.Category;

@Category({MiscTests.class, MediumTests.class})
public class TestConnectionCache extends TestCase {
  private static final HBaseTestingUtility UTIL = new HBaseTestingUtility();

  /**
   * test for ConnectionCache cleaning expired Connection
   */
  @Test
  public void testConnectionChore() throws Exception {
    UTIL.startMiniCluster();

    //1s for clean interval & 5s for maxIdleTime
    ConnectionCache cache = new ConnectionCache(UTIL.getConfiguration(),
        UserProvider.instantiate(UTIL.getConfiguration()), 1000, 5000);
    ConnectionCache.ConnectionInfo info = cache.getCurrentConnection();

    assertEquals(false, info.connection.isClosed());

    Thread.sleep(7000);

    assertEquals(true, info.connection.isClosed());
    UTIL.shutdownMiniCluster();
  }

}