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.alerts;
  
  import static junit.framework.Assert.assertEquals;
  import static org.easymock.EasyMock.expect;
  
  import java.lang.reflect.Field;
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  import org.apache.ambari.server.api.services.AmbariMetaInfo;
  import org.apache.ambari.server.events.AlertEvent;
  import org.apache.ambari.server.events.AlertReceivedEvent;
  import org.apache.ambari.server.events.MockEventListener;
  import org.apache.ambari.server.events.publishers.AlertEventPublisher;
  import org.apache.ambari.server.orm.dao.AlertDefinitionDAO;
  import org.apache.ambari.server.orm.entities.AlertDefinitionEntity;
  import org.apache.ambari.server.orm.entities.RepositoryVersionEntity;
  import org.apache.ambari.server.orm.entities.UpgradeEntity;
  import org.apache.ambari.server.stack.upgrade.Direction;
  import org.apache.ambari.server.state.Alert;
  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.ComponentInfo;
  import org.apache.ambari.server.state.Host;
  import org.apache.ambari.server.state.Service;
  import org.apache.ambari.server.state.ServiceComponent;
  import org.apache.ambari.server.state.ServiceComponentHost;
  import org.apache.ambari.server.state.StackId;
  import org.apache.ambari.server.testutils.PartialNiceMockBinder;
  import org.easymock.EasyMock;
  import org.easymock.EasyMockSupport;
  import org.junit.After;
  import org.junit.Before;
  import org.junit.Test;
  
  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;
  
  /**
   * Tests {@link ComponentVersionAlertRunnable}.
   */
  public class ComponentVersionAlertRunnableTest extends EasyMockSupport {
  
    private final static long CLUSTER_ID = 1;
    private final static String CLUSTER_NAME = "c1";
    private final static String HOSTNAME_1 = "c6401.ambari.apache.org";
    private final static String HOSTNAME_2 = "c6402.ambari.apache.org";
  
    private final static String EXPECTED_VERSION = "2.6.0.0-1234";
    private final static String WRONG_VERSION = "9.9.9.9-9999";
  
    private final static String DEFINITION_NAME = "ambari_server_component_version";
    private final static String DEFINITION_SERVICE = "AMBARI";
    private final static String DEFINITION_COMPONENT = "AMBARI_SERVER";
    private final static String DEFINITION_LABEL = "Mock Definition";
  
    private Clusters m_clusters;
    private Cluster m_cluster;
    private Injector m_injector;
    private AlertDefinitionDAO m_definitionDao;
    private AlertDefinitionEntity m_definition;
    private MockEventListener m_listener;
    private AmbariMetaInfo m_metaInfo;
  
    private AlertEventPublisher m_eventPublisher;
    private EventBus m_synchronizedBus;
  
    private Collection<Host> m_hosts;
    private Map<String, List<ServiceComponentHost>> m_hostComponentMap = new HashMap<>();
    private StackId m_desidredStackId;
  
    /**
     *
     */
    @Before
    public void setup() throws Exception {
      m_injector = Guice.createInjector(new MockModule());
      m_definitionDao = m_injector.getInstance(AlertDefinitionDAO.class);
      m_clusters = m_injector.getInstance(Clusters.class);
      m_cluster = m_injector.getInstance(Cluster.class);
      m_eventPublisher = m_injector.getInstance(AlertEventPublisher.class);
      m_listener = m_injector.getInstance(MockEventListener.class);
      m_definition = createNiceMock(AlertDefinitionEntity.class);
      m_metaInfo = m_injector.getInstance(AmbariMetaInfo.class);
  
      // !!! need a synchronous op for testing
      m_synchronizedBus = new EventBus();
      Field field = AlertEventPublisher.class.getDeclaredField("m_eventBus");
      field.setAccessible(true);
      field.set(m_eventPublisher, m_synchronizedBus);
  
      // register mock listener
      m_synchronizedBus.register(m_listener);
  
      // create the cluster map
      Map<String,Cluster> clusterMap = new HashMap<>();
      clusterMap.put(CLUSTER_NAME, m_cluster);
  
      // hosts
      m_hosts = new ArrayList<>();
      Host host1 = createNiceMock(Host.class);
      Host host2 = createNiceMock(Host.class);
      expect(host1.getHostName()).andReturn(HOSTNAME_1).atLeastOnce();
      expect(host2.getHostName()).andReturn(HOSTNAME_2).atLeastOnce();
      m_hosts.add(host1);
      m_hosts.add(host2);
  
      m_hostComponentMap.put(HOSTNAME_1, new ArrayList<>());
      m_hostComponentMap.put(HOSTNAME_2, new ArrayList<>());
  
      // desired stack
      m_desidredStackId = createNiceMock(StackId.class);
      expect(m_desidredStackId.getStackName()).andReturn("SOME-STACK").atLeastOnce();
      expect(m_desidredStackId.getStackVersion()).andReturn("STACK-VERSION").atLeastOnce();
  
      RepositoryVersionEntity repositoryVersionEntity = createNiceMock(RepositoryVersionEntity.class);
      expect(repositoryVersionEntity.getVersion()).andReturn(EXPECTED_VERSION).anyTimes();
  
      // services
      Service service = createNiceMock(Service.class);
      expect(service.getDesiredRepositoryVersion()).andReturn(repositoryVersionEntity).atLeastOnce();
  
      ServiceComponent serviceComponent = createNiceMock(ServiceComponent.class);
      expect(serviceComponent.getDesiredStackId()).andReturn(m_desidredStackId).atLeastOnce();
      expect(service.getServiceComponent(EasyMock.anyString())).andReturn(serviceComponent).atLeastOnce();
  
      // components
      ServiceComponentHost sch1_1 = createNiceMock(ServiceComponentHost.class);
      ServiceComponentHost sch1_2 = createNiceMock(ServiceComponentHost.class);
      ServiceComponentHost sch2_1 = createNiceMock(ServiceComponentHost.class);
      ServiceComponentHost sch2_2 = createNiceMock(ServiceComponentHost.class);
  
      expect(sch1_1.getServiceName()).andReturn("FOO").atLeastOnce();
      expect(sch1_1.getServiceComponentName()).andReturn("FOO_COMPONENT").atLeastOnce();
      expect(sch1_1.getVersion()).andReturn(EXPECTED_VERSION).atLeastOnce();
      expect(sch1_2.getServiceName()).andReturn("BAR").atLeastOnce();
      expect(sch1_2.getServiceComponentName()).andReturn("BAR_COMPONENT").atLeastOnce();
      expect(sch1_2.getVersion()).andReturn(EXPECTED_VERSION).atLeastOnce();
      expect(sch2_1.getServiceName()).andReturn("FOO").atLeastOnce();
      expect(sch2_1.getServiceComponentName()).andReturn("FOO_COMPONENT").atLeastOnce();
      expect(sch2_1.getVersion()).andReturn(EXPECTED_VERSION).atLeastOnce();
      expect(sch2_2.getServiceName()).andReturn("BAZ").atLeastOnce();
      expect(sch2_2.getServiceComponentName()).andReturn("BAZ_COMPONENT").atLeastOnce();
      expect(sch2_2.getVersion()).andReturn(EXPECTED_VERSION).atLeastOnce();
  
      m_hostComponentMap.get(HOSTNAME_1).add(sch1_1);
      m_hostComponentMap.get(HOSTNAME_1).add(sch1_2);
      m_hostComponentMap.get(HOSTNAME_2).add(sch2_1);
      m_hostComponentMap.get(HOSTNAME_2).add(sch2_2);
  
      // mock the definition for the alert
      expect(m_definition.getDefinitionName()).andReturn(DEFINITION_NAME).atLeastOnce();
      expect(m_definition.getServiceName()).andReturn(DEFINITION_SERVICE).atLeastOnce();
      expect(m_definition.getComponentName()).andReturn(DEFINITION_COMPONENT).atLeastOnce();
      expect(m_definition.getLabel()).andReturn(DEFINITION_LABEL).atLeastOnce();
      expect(m_definition.getEnabled()).andReturn(true).atLeastOnce();
  
      // mock the cluster
      expect(m_cluster.getClusterId()).andReturn(CLUSTER_ID).atLeastOnce();
      expect(m_cluster.getHosts()).andReturn(m_hosts).atLeastOnce();
      expect(m_cluster.getService(EasyMock.anyString())).andReturn(service).atLeastOnce();
  
      // mock clusters
      expect(m_clusters.getClusters()).andReturn(clusterMap).atLeastOnce();
  
      // mock the definition DAO
      expect(m_definitionDao.findByName(CLUSTER_ID, DEFINITION_NAME)).andReturn(
          m_definition).atLeastOnce();
  
      m_metaInfo.init();
      EasyMock.expectLastCall().anyTimes();
  
      // expect the cluster host mapping
      expect(m_cluster.getServiceComponentHosts(HOSTNAME_1)).andReturn(
          m_hostComponentMap.get(HOSTNAME_1)).once();
      expect(m_cluster.getServiceComponentHosts(HOSTNAME_2)).andReturn(
          m_hostComponentMap.get(HOSTNAME_2)).once();
  
      // expect the component from metainfo
      ComponentInfo componentInfo = createNiceMock(ComponentInfo.class);
      expect(componentInfo.isVersionAdvertised()).andReturn(true).atLeastOnce();
      expect(m_metaInfo.getComponent(EasyMock.anyString(), EasyMock.anyString(), EasyMock.anyString(),
          EasyMock.anyString())).andReturn(componentInfo).atLeastOnce();
      }
  
    /**
     * @throws Exception
     */
    @After
    public void teardown() throws Exception {
    }
  
    /**
     * Tests that the alert is SKIPPED when there is an upgrade in progress.
     */
    @Test
    public void testUpgradeInProgress() throws Exception {
      UpgradeEntity upgrade = createNiceMock(UpgradeEntity.class);
      expect(upgrade.getDirection()).andReturn(Direction.UPGRADE).atLeastOnce();
      expect(m_cluster.getUpgradeInProgress()).andReturn(upgrade).once();
  
      replayAll();
  
      m_metaInfo.init();
  
      // precondition that no events were fired
      assertEquals(0, m_listener.getAlertEventReceivedCount(AlertReceivedEvent.class));
  
      // instantiate and inject mocks
      ComponentVersionAlertRunnable runnable = new ComponentVersionAlertRunnable(
          m_definition.getDefinitionName());
  
      m_injector.injectMembers(runnable);
  
      // run the alert
      runnable.run();
  
      assertEquals(1, m_listener.getAlertEventReceivedCount(AlertReceivedEvent.class));
  
      List<AlertEvent> events = m_listener.getAlertEventInstances(AlertReceivedEvent.class);
      assertEquals(1, events.size());
  
      AlertReceivedEvent event = (AlertReceivedEvent) events.get(0);
      Alert alert = event.getAlert();
      assertEquals("AMBARI", alert.getService());
      assertEquals("AMBARI_SERVER", alert.getComponent());
      assertEquals(AlertState.SKIPPED, alert.getState());
      assertEquals(DEFINITION_NAME, alert.getName());
    }
  
    /**
     * Tests the alert that fires when all components are reporting correct
     * versions.
     */
    @Test
    public void testAllComponentVersionsCorrect() throws Exception {
      replayAll();
  
      m_metaInfo.init();
  
      // precondition that no events were fired
      assertEquals(0, m_listener.getAlertEventReceivedCount(AlertReceivedEvent.class));
  
      // instantiate and inject mocks
      ComponentVersionAlertRunnable runnable = new ComponentVersionAlertRunnable(
          m_definition.getDefinitionName());
  
      m_injector.injectMembers(runnable);
  
      // run the alert
      runnable.run();
  
      assertEquals(1, m_listener.getAlertEventReceivedCount(AlertReceivedEvent.class));
  
      List<AlertEvent> events = m_listener.getAlertEventInstances(AlertReceivedEvent.class);
      assertEquals(1, events.size());
  
      AlertReceivedEvent event = (AlertReceivedEvent) events.get(0);
      Alert alert = event.getAlert();
      assertEquals("AMBARI", alert.getService());
      assertEquals("AMBARI_SERVER", alert.getComponent());
      assertEquals(AlertState.OK, alert.getState());
      assertEquals(DEFINITION_NAME, alert.getName());
  
      verifyAll();
    }
  
    /**
     * Tests that the alert which fires when there is a mismatch is a WARNING.
     */
    @Test
    public void testomponentVersionMismatch() throws Exception {
      // reset expectation so that it returns a wrong version
      ServiceComponentHost sch = m_hostComponentMap.get(HOSTNAME_1).get(0);
      EasyMock.reset(sch);
      expect(sch.getServiceName()).andReturn("FOO").atLeastOnce();
      expect(sch.getServiceComponentName()).andReturn("FOO_COMPONENT").atLeastOnce();
      expect(sch.getVersion()).andReturn(WRONG_VERSION).atLeastOnce();
  
      replayAll();
  
      m_metaInfo.init();
  
      // precondition that no events were fired
      assertEquals(0, m_listener.getAlertEventReceivedCount(AlertReceivedEvent.class));
  
      // instantiate and inject mocks
      ComponentVersionAlertRunnable runnable = new ComponentVersionAlertRunnable(
          m_definition.getDefinitionName());
  
      m_injector.injectMembers(runnable);
  
      // run the alert
      runnable.run();
  
      assertEquals(1, m_listener.getAlertEventReceivedCount(AlertReceivedEvent.class));
  
      List<AlertEvent> events = m_listener.getAlertEventInstances(AlertReceivedEvent.class);
      assertEquals(1, events.size());
  
      AlertReceivedEvent event = (AlertReceivedEvent) events.get(0);
      Alert alert = event.getAlert();
      assertEquals("AMBARI", alert.getService());
      assertEquals("AMBARI_SERVER", alert.getComponent());
      assertEquals(AlertState.WARNING, alert.getState());
      assertEquals(DEFINITION_NAME, alert.getName());
  
      verifyAll();
    }
  
  
    /**
     *
     */
    private class MockModule implements Module {
      /**
       *
       */
      @Override
      public void configure(Binder binder) {
        Cluster cluster = createNiceMock(Cluster.class);
  
        PartialNiceMockBinder.newBuilder(ComponentVersionAlertRunnableTest.this).addConfigsBindings()
            .addDBAccessorBinding()
            .addFactoriesInstallBinding()
            .addAmbariMetaInfoBinding()
            .addLdapBindings()
            .build().configure(binder);
  
        binder.bind(AmbariMetaInfo.class).toInstance(createNiceMock(AmbariMetaInfo.class));
        binder.bind(Cluster.class).toInstance(cluster);
        binder.bind(AlertDefinitionDAO.class).toInstance(createNiceMock(AlertDefinitionDAO.class));
      }
    }
  }
  