content: /*
   * 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.apache.ambari.server.api.services;
  
  import java.util.Map;
  
  import org.apache.ambari.server.H2DatabaseCleaner;
  import org.apache.ambari.server.orm.GuiceJpaInitializer;
  import org.apache.ambari.server.orm.InMemoryDefaultTestModule;
  import org.junit.After;
  import org.junit.Assert;
  import org.junit.Before;
  import org.junit.Test;
  
  import com.google.inject.Guice;
  import com.google.inject.Injector;
  
  
  public class PersistKeyValueImplTest extends Assert {
  
    public static final int NUMB_THREADS = 1000;
  
    private Injector injector;
  
    @Before
    public void setUp() throws Exception {
      injector = Guice.createInjector(new InMemoryDefaultTestModule());
      injector.getInstance(GuiceJpaInitializer.class);
    }
  
    @After
    public void tearDown() throws Exception {
      H2DatabaseCleaner.clearDatabaseAndStopPersistenceService(injector);
    }
  
    @Test
    public void testStore() throws Exception {
      PersistKeyValueImpl impl = injector.getInstance(PersistKeyValueImpl.class);
      Map<String, String> map = impl.getAllKeyValues();
      assertEquals(0, map.size());
  
      impl.put("key1", "value1");
      impl.put("key2", "value2");
  
      map = impl.getAllKeyValues();
      assertEquals(2, map.size());
      assertEquals("value1", impl.getValue("key1"));
      assertEquals("value2", impl.getValue("key2"));
      assertEquals(map.get("key1"), impl.getValue("key1"));
  
      impl.put("key1", "value1-2");
      assertEquals("value1-2", impl.getValue("key1"));
      assertEquals(2, map.size());
  
      StringBuilder largeValueBuilder = new StringBuilder();
      for (int i = 0; i < 320; i++) {
        largeValueBuilder.append("0123456789");
      }
      String largeValue = largeValueBuilder.toString();
  
      impl.put("key3", largeValue);
  
      assertEquals(largeValue, impl.getValue("key3"));
  
    }
  
    @Test
    public void testMultiThreaded() throws Exception {
      final PersistKeyValueImpl impl = injector.getInstance(PersistKeyValueImpl.class);
      Thread[] threads = new Thread[NUMB_THREADS];
  
      for ( int i = 0; i < NUMB_THREADS; ++i ) {
        threads[i] = new Thread() {
          @Override
          public void run() {
  
            for (int i = 0; i < 100; ++i) {
              impl.put("key1", "value1");
              impl.put("key2", "value2");
              impl.put("key3", "value3");
              impl.put("key4", "value4");
            }
          }
        };
      }
  
      for ( int i = 0; i < NUMB_THREADS; ++i ) {
        threads[i].start();
      }
  
      for ( int i = 0; i < NUMB_THREADS; ++i ) {
        threads[i].join();
      }
    }
  }
  