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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
   * 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
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  package org.apache.atlas.storm.hook;
  
  import com.fasterxml.jackson.databind.JsonNode;
  import org.apache.atlas.ApplicationProperties;
  import org.apache.atlas.AtlasClient;
  import org.apache.atlas.hive.bridge.HiveMetaStoreBridge;
  import org.apache.atlas.storm.model.StormDataTypes;
  import org.apache.atlas.utils.AuthenticationUtil;
  import org.apache.atlas.v1.model.instance.Referenceable;
  import org.apache.commons.configuration.Configuration;
  import org.apache.storm.ILocalCluster;
  import org.apache.storm.generated.StormTopology;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.testng.annotations.AfterClass;
  import org.testng.annotations.BeforeClass;
  import org.testng.annotations.Test;
  
  import static org.testng.Assert.assertNotNull;
  
  @Test
  public class StormAtlasHookIT {
      public static final Logger LOG = LoggerFactory.getLogger(StormAtlasHookIT.class);
  
      private static final String ATLAS_URL = "http://localhost:21000/";
      private static final String TOPOLOGY_NAME = "word-count";
  
      private ILocalCluster stormCluster;
      private AtlasClient atlasClient;
  
      @BeforeClass
      public void setUp() throws Exception {
          // start a local storm cluster
          stormCluster = StormTestUtil.createLocalStormCluster();
          LOG.info("Created a storm local cluster");
  
          Configuration configuration = ApplicationProperties.get();
          if (!AuthenticationUtil.isKerberosAuthenticationEnabled()) {
              atlasClient = new AtlasClient(configuration.getStringArray(HiveMetaStoreBridge.ATLAS_ENDPOINT), new String[] {"admin", "admin"});
          } else {
              atlasClient = new AtlasClient(configuration.getStringArray(HiveMetaStoreBridge.ATLAS_ENDPOINT));
          }
      }
  
      @AfterClass
      public void tearDown() throws Exception {
          LOG.info("Shutting down storm local cluster");
          stormCluster.shutdown();
  
          atlasClient = null;
      }
  
      @Test
      public void testAddEntities() throws Exception {
          StormTopology stormTopology = StormTestUtil.createTestTopology();
          StormTestUtil.submitTopology(stormCluster, TOPOLOGY_NAME, stormTopology);
          LOG.info("Submitted topology {}", TOPOLOGY_NAME);
  
          // todo: test if topology metadata is registered in atlas
          String guid = getTopologyGUID();
          assertNotNull(guid);
          LOG.info("GUID is {}", guid);
  
          Referenceable topologyReferenceable = atlasClient.getEntity(guid);
          assertNotNull(topologyReferenceable);
      }
  
      private String getTopologyGUID() throws Exception {
          LOG.debug("Searching for topology {}", TOPOLOGY_NAME);
          String query = String.format("from %s where name = \"%s\"",
                  StormDataTypes.STORM_TOPOLOGY.getName(), TOPOLOGY_NAME);
  
          JsonNode results = atlasClient.search(query, 10, 0);
          JsonNode  row    = results.get(0);
  
          return row.has("$id$") ? row.get("$id$").get("id").asText() : null;
      }
  }
  