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
   * <p>
   * http://www.apache.org/licenses/LICENSE-2.0
   * <p>
   * 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.atlas.web.service;
  
  import org.apache.atlas.ha.HAConfiguration;
  import org.apache.commons.configuration.Configuration;
  import org.apache.curator.framework.CuratorFramework;
  import org.apache.curator.framework.api.CreateBuilder;
  import org.apache.curator.framework.api.ExistsBuilder;
  import org.apache.curator.framework.api.GetDataBuilder;
  import org.apache.curator.framework.api.SetDataBuilder;
  import org.apache.zookeeper.CreateMode;
  import org.apache.zookeeper.ZooDefs;
  import org.apache.zookeeper.data.ACL;
  import org.apache.zookeeper.data.Id;
  import org.apache.zookeeper.data.Stat;
  import org.mockito.Mock;
  import org.mockito.MockitoAnnotations;
  import org.testng.annotations.BeforeTest;
  import org.testng.annotations.Test;
  
  import java.nio.charset.StandardCharsets;
  import java.util.Arrays;
  
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.verify;
  import static org.mockito.Mockito.when;
  import static org.testng.Assert.assertEquals;
  import static org.testng.Assert.assertNull;
  
  public class ActiveInstanceStateTest {
      private static final String HOST_PORT      = "127.0.0.1:21000";
      public static final  String SERVER_ADDRESS = "http://" + HOST_PORT;
  
      @Mock
      private Configuration configuration;
  
      @Mock
      private CuratorFactory curatorFactory;
  
      @Mock
      private CuratorFramework curatorFramework;
  
      @BeforeTest
      public void setup() {
          MockitoAnnotations.initMocks(this);
      }
  
      @Test
      public void testSharedPathIsCreatedIfNotExists() throws Exception {
          when(configuration.getString(HAConfiguration.ATLAS_SERVER_ADDRESS_PREFIX + "id1")).thenReturn(HOST_PORT);
          when(configuration.getString(HAConfiguration.ATLAS_SERVER_HA_ZK_ROOT_KEY, HAConfiguration.ATLAS_SERVER_ZK_ROOT_DEFAULT)).thenReturn(HAConfiguration.ATLAS_SERVER_ZK_ROOT_DEFAULT);
  
          when(curatorFactory.clientInstance()).thenReturn(curatorFramework);
  
          ExistsBuilder existsBuilder = mock(ExistsBuilder.class);
  
          when(curatorFramework.checkExists()).thenReturn(existsBuilder);
          when(existsBuilder.forPath(getPath())).thenReturn(null);
  
          CreateBuilder createBuilder = mock(CreateBuilder.class);
  
          when(curatorFramework.create()).thenReturn(createBuilder);
          when(createBuilder.withMode(CreateMode.EPHEMERAL)).thenReturn(createBuilder);
          when(createBuilder.withACL(ZooDefs.Ids.OPEN_ACL_UNSAFE)).thenReturn(createBuilder);
  
          SetDataBuilder setDataBuilder = mock(SetDataBuilder.class);
  
          when(curatorFramework.setData()).thenReturn(setDataBuilder);
  
          ActiveInstanceState activeInstanceState = new ActiveInstanceState(configuration, curatorFactory);
  
          activeInstanceState.update("id1");
  
          verify(createBuilder).forPath(getPath());
      }
  
      @Test
      public void testSharedPathIsCreatedWithRightACLIfNotExists() throws Exception {
          when(configuration.getString(HAConfiguration.ATLAS_SERVER_ADDRESS_PREFIX + "id1")).thenReturn(HOST_PORT);
          when(configuration.getString(HAConfiguration.HA_ZOOKEEPER_ACL)).thenReturn("sasl:myclient@EXAMPLE.COM");
          when(configuration.getString(HAConfiguration.ATLAS_SERVER_HA_ZK_ROOT_KEY, HAConfiguration.ATLAS_SERVER_ZK_ROOT_DEFAULT)).thenReturn(HAConfiguration.ATLAS_SERVER_ZK_ROOT_DEFAULT);
  
          when(curatorFactory.clientInstance()).thenReturn(curatorFramework);
  
          ExistsBuilder existsBuilder = mock(ExistsBuilder.class);
  
          when(curatorFramework.checkExists()).thenReturn(existsBuilder);
          when(existsBuilder.forPath(getPath())).thenReturn(null);
  
          CreateBuilder createBuilder = mock(CreateBuilder.class);
  
          when(curatorFramework.create()).thenReturn(createBuilder);
          when(createBuilder.withMode(CreateMode.EPHEMERAL)).thenReturn(createBuilder);
  
          ACL expectedAcl  = new ACL(ZooDefs.Perms.ALL, new Id("sasl", "myclient@EXAMPLE.COM"));
          ACL expectedAcl1 = new ACL(ZooDefs.Perms.READ, new Id("world", "anyone"));
  
          when(createBuilder.withACL(Arrays.asList(expectedAcl, expectedAcl1))).thenReturn(createBuilder);
  
          SetDataBuilder setDataBuilder = mock(SetDataBuilder.class);
  
          when(curatorFramework.setData()).thenReturn(setDataBuilder);
  
          ActiveInstanceState activeInstanceState = new ActiveInstanceState(configuration, curatorFactory);
  
          activeInstanceState.update("id1");
  
          verify(createBuilder).forPath(getPath());
      }
  
      @Test
      public void testDataIsUpdatedWithAtlasServerAddress() throws Exception {
          when(configuration.getString(HAConfiguration.ATLAS_SERVER_ADDRESS_PREFIX + "id1")).thenReturn(HOST_PORT);
          when(configuration.getString(HAConfiguration.ATLAS_SERVER_HA_ZK_ROOT_KEY, HAConfiguration.ATLAS_SERVER_ZK_ROOT_DEFAULT)).thenReturn(HAConfiguration.ATLAS_SERVER_ZK_ROOT_DEFAULT);
  
          when(curatorFactory.clientInstance()).thenReturn(curatorFramework);
  
          ExistsBuilder existsBuilder = mock(ExistsBuilder.class);
  
          when(curatorFramework.checkExists()).thenReturn(existsBuilder);
          when(existsBuilder.forPath(getPath())).thenReturn(new Stat());
  
          SetDataBuilder setDataBuilder = mock(SetDataBuilder.class);
  
          when(curatorFramework.setData()).thenReturn(setDataBuilder);
  
          ActiveInstanceState activeInstanceState = new ActiveInstanceState(configuration, curatorFactory);
  
          activeInstanceState.update("id1");
  
          verify(setDataBuilder).forPath(getPath(), SERVER_ADDRESS.getBytes(StandardCharsets.UTF_8));
      }
  
      @Test
      public void testShouldReturnActiveServerAddress() throws Exception {
          when(curatorFactory.clientInstance()).thenReturn(curatorFramework);
          when(configuration.getString(HAConfiguration.ATLAS_SERVER_HA_ZK_ROOT_KEY, HAConfiguration.ATLAS_SERVER_ZK_ROOT_DEFAULT)).thenReturn(HAConfiguration.ATLAS_SERVER_ZK_ROOT_DEFAULT);
  
          GetDataBuilder getDataBuilder = mock(GetDataBuilder.class);
  
          when(curatorFramework.getData()).thenReturn(getDataBuilder);
          when(getDataBuilder.forPath(getPath())).thenReturn(SERVER_ADDRESS.getBytes(StandardCharsets.UTF_8));
  
          ActiveInstanceState activeInstanceState = new ActiveInstanceState(configuration, curatorFactory);
          String              actualServerAddress = activeInstanceState.getActiveServerAddress();
  
          assertEquals(actualServerAddress, SERVER_ADDRESS);
      }
  
      @Test
      public void testShouldHandleExceptionsInFetchingServerAddress() throws Exception {
          when(curatorFactory.clientInstance()).thenReturn(curatorFramework);
          when(configuration.getString(HAConfiguration.ATLAS_SERVER_HA_ZK_ROOT_KEY, HAConfiguration.ATLAS_SERVER_ZK_ROOT_DEFAULT)).thenReturn(HAConfiguration.ATLAS_SERVER_ZK_ROOT_DEFAULT);
  
          GetDataBuilder getDataBuilder = mock(GetDataBuilder.class);
  
          when(curatorFramework.getData()).thenReturn(getDataBuilder);
          when(getDataBuilder.forPath(getPath())).thenThrow(new Exception());
  
          ActiveInstanceState activeInstanceState = new ActiveInstanceState(configuration, curatorFactory);
  
          assertNull(activeInstanceState.getActiveServerAddress());
      }
  
      private String getPath() {
          return HAConfiguration.ATLAS_SERVER_ZK_ROOT_DEFAULT + ActiveInstanceState.APACHE_ATLAS_ACTIVE_SERVER_INFO;
      }
  }
  