content: /**
   * Licensed 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 org.apache.aurora.scheduler.http;
  
  import java.util.Objects;
  import java.util.stream.Collectors;
  import java.util.stream.StreamSupport;
  import javax.inject.Inject;
  import javax.ws.rs.GET;
  import javax.ws.rs.Path;
  import javax.ws.rs.Produces;
  import javax.ws.rs.core.MediaType;
  import javax.ws.rs.core.Response;
  
  import com.fasterxml.jackson.annotation.JsonInclude;
  import com.fasterxml.jackson.core.JsonProcessingException;
  import com.fasterxml.jackson.databind.ObjectMapper;
  import com.fasterxml.jackson.databind.PropertyNamingStrategy;
  import com.hubspot.jackson.datatype.protobuf.ProtobufModule;
  
  import org.apache.aurora.scheduler.offers.OfferManager;
  
  /**
   * Servlet that exposes resource offers that the scheduler is currently retaining.
   */
  @Path("/offers")
  public class Offers {
  
    private final OfferManager offerManager;
    private final ObjectMapper mapper;
  
    @Inject
    Offers(OfferManager offerManager) {
      this.offerManager = Objects.requireNonNull(offerManager);
      mapper = new ObjectMapper()
          .registerModule(new ProtobufModule())
          .setPropertyNamingStrategy(PropertyNamingStrategy.CAMEL_CASE_TO_LOWER_CASE_WITH_UNDERSCORES)
          .setSerializationInclusion(JsonInclude.Include.NON_NULL);
    }
  
    /**
     * Dumps the offers queued in the scheduler.
     *
     * @return HTTP response.
     */
    @GET
    @Produces(MediaType.APPLICATION_JSON)
    public Response getOffers() throws JsonProcessingException {
      return Response.ok(
          mapper.writeValueAsString(
              StreamSupport.stream(offerManager.getAll().spliterator(), false)
                  .map(o -> o.getOffer())
                  .collect(Collectors.toList())))
          .build();
    }
  }
  