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.state.alerts;
  
  import java.util.List;
  
  import jakarta.persistence.EntityManager;
  
  import org.apache.ambari.server.H2DatabaseCleaner;
  import org.apache.ambari.server.events.AlertReceivedEvent;
  import org.apache.ambari.server.events.InitialAlertEvent;
  import org.apache.ambari.server.events.MockEventListener;
  import org.apache.ambari.server.events.publishers.AlertEventPublisher;
  import org.apache.ambari.server.orm.GuiceJpaInitializer;
  import org.apache.ambari.server.orm.InMemoryDefaultTestModule;
  import org.apache.ambari.server.orm.OrmTestHelper;
  import org.apache.ambari.server.orm.dao.AlertDefinitionDAO;
  import org.apache.ambari.server.orm.dao.AlertsDAO;
  import org.apache.ambari.server.orm.entities.AlertCurrentEntity;
  import org.apache.ambari.server.orm.entities.AlertDefinitionEntity;
  import org.apache.ambari.server.orm.entities.RepositoryVersionEntity;
  import org.apache.ambari.server.state.Alert;
  import org.apache.ambari.server.state.AlertFirmness;
  import org.apache.ambari.server.state.AlertState;
  import org.apache.ambari.server.state.Cluster;
  import org.apache.ambari.server.state.Clusters;
  import org.apache.ambari.server.state.ServiceFactory;
  import org.apache.ambari.server.state.StackId;
  import org.apache.ambari.server.utils.EventBusSynchronizer;
  import org.junit.After;
  import org.junit.Before;
  import org.junit.Test;
  import org.junit.experimental.categories.Category;
  
  import com.google.common.eventbus.EventBus;
  import com.google.inject.Binder;
  import com.google.inject.Guice;
  import com.google.inject.Injector;
  import com.google.inject.Module;
  import com.google.inject.util.Modules;
  
  import junit.framework.Assert;
  
  /**
   * Tests that {@link InitialAlertEventTest} instances are fired correctly.
   */
  @Category({ category.AlertTest.class })
  public class InitialAlertEventTest {
  
    private AlertsDAO m_alertsDao;
    private AlertEventPublisher m_eventPublisher;
    private Injector m_injector;
    private MockEventListener m_listener;
  
    private AlertDefinitionDAO m_definitionDao;
    private Clusters m_clusters;
    private Cluster m_cluster;
    private String m_clusterName;
    private ServiceFactory m_serviceFactory;
  
    private OrmTestHelper m_helper;
  
    private final String STACK_VERSION = "2.0.6";
    private final String REPO_VERSION = "2.0.6-1234";
    private final StackId STACK_ID = new StackId("HDP", STACK_VERSION);
    private RepositoryVersionEntity m_repositoryVersion;
  
    /**
     *
     */
    @Before
    public void setup() throws Exception {
      m_injector = Guice.createInjector(Modules.override(
          new InMemoryDefaultTestModule()).with(new MockModule()));
  
      m_injector.getInstance(GuiceJpaInitializer.class);
  
      // get a mock listener
      m_listener = m_injector.getInstance(MockEventListener.class);
  
      // create the publisher and mock listener
      m_eventPublisher = m_injector.getInstance(AlertEventPublisher.class);
  
      // register listeners needed
      EventBus synchronizedBus = EventBusSynchronizer.synchronizeAlertEventPublisher(m_injector);
      synchronizedBus.register(m_listener);
  
      m_definitionDao = m_injector.getInstance(AlertDefinitionDAO.class);
      m_clusters = m_injector.getInstance(Clusters.class);
      m_serviceFactory = m_injector.getInstance(ServiceFactory.class);
  
      m_alertsDao = m_injector.getInstance(AlertsDAO.class);
      m_helper = m_injector.getInstance(OrmTestHelper.class);
  
      m_repositoryVersion = m_helper.getOrCreateRepositoryVersion(STACK_ID, REPO_VERSION);
  
      m_clusterName = "c1";
      m_clusters.addCluster(m_clusterName, STACK_ID);
      m_cluster = m_clusters.getCluster(m_clusterName);
      Assert.assertNotNull(m_cluster);
  
      // install HDFS to get 6 definitions
      installHdfsService();
      Assert.assertEquals(1, m_cluster.getServices().size());
      Assert.assertEquals(6, m_definitionDao.findAll().size());
    }
  
    /**
     * @throws Exception
     */
    @After
    public void teardown() throws Exception {
      H2DatabaseCleaner.clearDatabase(m_injector.getProvider(EntityManager.class).get());
      m_injector = null;
    }
  
    /**
     * Tests that when a new alert is received that an {@link InitialAlertEvent}
     * is fired.
     *
     * @throws Exception
     */
    @Test
    public void testInitialAlertEvent() throws Exception {
      // ensure there are no historical items
      Assert.assertEquals(0, m_alertsDao.findAll().size());
      Assert.assertEquals(0,
          m_listener.getAlertEventReceivedCount(InitialAlertEvent.class));
  
      // get a definition to use for the incoming alert
      AlertDefinitionEntity definition = m_definitionDao.findAll(
          m_cluster.getClusterId()).get(0);
  
      // create the "first" alert
      Alert alert = new Alert(definition.getDefinitionName(), null,
          definition.getServiceName(), definition.getComponentName(), null,
          AlertState.CRITICAL);
  
      alert.setClusterId(m_cluster.getClusterId());
  
      AlertReceivedEvent event = new AlertReceivedEvent(m_cluster.getClusterId(), alert);
  
      // public the received event
      m_eventPublisher.publish(event);
  
      // ensure we now have a history item and a current
      Assert.assertEquals(1, m_alertsDao.findAll().size());
      List<AlertCurrentEntity> currentAlerts = m_alertsDao.findCurrent();
      Assert.assertEquals(1, currentAlerts.size());
  
      // verify that that initial alert is HARD
      Assert.assertEquals(AlertFirmness.HARD, currentAlerts.get(0).getFirmness());
      Assert.assertEquals(AlertState.CRITICAL,
          currentAlerts.get(0).getAlertHistory().getAlertState());
  
      // verify that the initial alert event was triggered
      Assert.assertEquals(1,
          m_listener.getAlertEventReceivedCount(InitialAlertEvent.class));
  
      // clear the initial alert event that was recorded
      m_listener.reset();
  
      // alert the alert and re-fire
      alert.setState(AlertState.WARNING);
      m_eventPublisher.publish(event);
  
      // ensure that the initial alert event was NOT received again
      Assert.assertEquals(0,
          m_listener.getAlertEventReceivedCount(InitialAlertEvent.class));
    }
  
    private void installHdfsService() throws Exception {
      String serviceName = "HDFS";
      m_serviceFactory.createNew(m_cluster, serviceName, m_repositoryVersion);
      Assert.assertNotNull(m_cluster.getService(serviceName));
    }
  
    /**
     *
     */
    private static class MockModule implements Module {
      /**
       * {@inheritDoc}
       */
      @Override
      public void configure(Binder binder) {
        // sychronize on the ambari event bus for this test to work properly
        EventBusSynchronizer.synchronizeAmbariEventPublisher(binder);
      }
    }
  }
  