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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.sqoop.hook;
  
  import org.apache.atlas.ApplicationProperties;
  import org.apache.atlas.AtlasClient;
  import org.apache.atlas.hive.bridge.HiveMetaStoreBridge;
  import org.apache.atlas.hive.model.HiveDataTypes;
  import org.apache.atlas.sqoop.model.SqoopDataTypes;
  import org.apache.atlas.utils.AuthenticationUtil;
  import org.apache.atlas.utils.ParamChecker;
  import org.apache.atlas.v1.model.instance.Referenceable;
  import org.apache.commons.configuration.Configuration;
  import org.apache.sqoop.SqoopJobDataPublisher;
  import org.slf4j.Logger;
  import org.testng.annotations.BeforeClass;
  import org.testng.annotations.Test;
  
  import java.util.Properties;
  
  import static org.testng.Assert.assertNotNull;
  import static org.testng.Assert.fail;
  
  public class SqoopHookIT {
      public static final Logger LOG = org.slf4j.LoggerFactory.getLogger(SqoopHookIT.class);
      private static final String CLUSTER_NAME = "primary";
      public static final String DEFAULT_DB = "default";
      private static final int MAX_WAIT_TIME = 2000;
      private AtlasClient atlasClient;
  
      @BeforeClass
      public void setUp() throws Exception {
          //Set-up sqoop session
          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));
          }
      }
  
      @Test
      public void testSqoopImport() throws Exception {
          SqoopJobDataPublisher.Data d = new SqoopJobDataPublisher.Data("import", "jdbc:mysql:///localhost/db",
                  "mysqluser", "mysql", "myTable", null, "default", "hiveTable", new Properties(),
                  System.currentTimeMillis() - 100, System.currentTimeMillis());
          SqoopHook hook = new SqoopHook();
          hook.publish(d);
          Thread.sleep(1000);
          String storeName  = SqoopHook.getSqoopDBStoreName(d);
          assertDBStoreIsRegistered(storeName);
          String name = SqoopHook.getSqoopProcessName(d, CLUSTER_NAME);
          assertSqoopProcessIsRegistered(name);
          assertHiveTableIsRegistered(DEFAULT_DB, "hiveTable");
      }
  
      @Test
      public void testSqoopExport() throws Exception {
          SqoopJobDataPublisher.Data d = new SqoopJobDataPublisher.Data("export", "jdbc:mysql:///localhost/db",
                  "mysqluser", "mysql", "myTable", null, "default", "hiveTable", new Properties(),
                  System.currentTimeMillis() - 100, System.currentTimeMillis());
          SqoopHook hook = new SqoopHook();
          hook.publish(d);
          Thread.sleep(1000);
          String storeName  = SqoopHook.getSqoopDBStoreName(d);
          assertDBStoreIsRegistered(storeName);
          String name = SqoopHook.getSqoopProcessName(d, CLUSTER_NAME);
          assertSqoopProcessIsRegistered(name);
          assertHiveTableIsRegistered(DEFAULT_DB, "hiveTable");
      }
  
      private String assertDBStoreIsRegistered(String storeName) throws Exception {
          LOG.debug("Searching for db store {}",  storeName);
          return assertEntityIsRegistered(SqoopDataTypes.SQOOP_DBDATASTORE.getName(), AtlasClient.REFERENCEABLE_ATTRIBUTE_NAME, storeName, null);
      }
  
      private String assertHiveTableIsRegistered(String dbName, String tableName) throws Exception {
          LOG.debug("Searching for table {}.{}", dbName, tableName);
          return assertEntityIsRegistered(HiveDataTypes.HIVE_TABLE.getName(), AtlasClient.REFERENCEABLE_ATTRIBUTE_NAME, HiveMetaStoreBridge.getTableQualifiedName(CLUSTER_NAME, dbName, tableName), null);
      }
  
      private String assertSqoopProcessIsRegistered(String processName) throws Exception {
          LOG.debug("Searching for sqoop process {}",  processName);
          return assertEntityIsRegistered(SqoopDataTypes.SQOOP_PROCESS.getName(), AtlasClient.REFERENCEABLE_ATTRIBUTE_NAME, processName, null);
      }
  
      protected String assertEntityIsRegistered(final String typeName, final String property, final String value,
                                                final AssertPredicate assertPredicate) throws Exception {
          waitFor(80000, new Predicate() {
              @Override
              public void evaluate() throws Exception {
                  Referenceable entity = atlasClient.getEntity(typeName, property, value);
                  assertNotNull(entity);
                  if (assertPredicate != null) {
                      assertPredicate.assertOnEntity(entity);
                  }
              }
          });
          Referenceable entity = atlasClient.getEntity(typeName, property, value);
          return entity.getId()._getId();
      }
  
      public interface Predicate {
          void evaluate() throws Exception;
      }
  
      public interface AssertPredicate {
          void assertOnEntity(Referenceable entity) throws Exception;
      }
  
      protected void waitFor(int timeout, Predicate predicate) throws Exception {
          ParamChecker.notNull(predicate, "predicate");
          long mustEnd = System.currentTimeMillis() + timeout;
  
          while (true) {
              try {
                  predicate.evaluate();
                  return;
              } catch (Error | Exception e) {
                  if (System.currentTimeMillis() >= mustEnd) {
                      fail("Assertions failed. Failing after waiting for timeout " + timeout + " msecs", e);
                  }
                  LOG.debug("Waiting up to {} msec as assertion failed", mustEnd - System.currentTimeMillis(), e);
                  Thread.sleep(5000);
              }
          }
      }
  }
  