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Extension to rename Druid dimension values using Kafka8

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/*
 * Licensed to Metamarkets Group Inc. (Metamarkets) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. Metamarkets 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 io.druid.query.lookup;

import com.google.common.util.concurrent.ListenableFuture;

import javax.ws.rs.GET;
import javax.ws.rs.core.Response;

public class KafkaLookupExtractorIntrospectionHandler implements LookupIntrospectHandler
{
  private KafkaLookupExtractorFactory kafkaLookupExtractorFactory;

  public KafkaLookupExtractorIntrospectionHandler(KafkaLookupExtractorFactory kafkaLookupExtractorFactory)
  {
    this.kafkaLookupExtractorFactory = kafkaLookupExtractorFactory;
  }

  @GET
  public Response getActive()
  {
    final ListenableFuture future = kafkaLookupExtractorFactory.getFuture();
    if (future != null && !future.isDone()) {
      return Response.ok().build();
    } else {
      return Response.status(Response.Status.GONE).build();
    }
  }
}