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.impala.hook;
  
  import org.apache.impala.hooks.QueryCompleteContext;
  import org.apache.impala.hooks.QueryEventHook;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public class ImpalaHook implements QueryEventHook {
      private static final Logger LOG = LoggerFactory.getLogger(ImpalaHook.class);
  
      private ImpalaLineageHook lineageHook;
  
      /**
       * Execute Impala hook
       */
      public void onQueryComplete(QueryCompleteContext context)  {
          try {
              lineageHook.process(context.getLineageGraph());
          } catch (Exception ex) {
              String errorMessage = String.format("Error in processing impala lineage: {}", context.getLineageGraph());
              LOG.error(errorMessage, ex);
          }
      }
  
      /**
       * Initialization of Impala hook
       */
      public void onImpalaStartup() {
          lineageHook = new ImpalaLineageHook();
      }
  }
  