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 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.google.common.collect.ImmutableMap;
  import com.google.inject.Inject;
  
  import org.apache.aurora.scheduler.TierManager;
  
  /*
   * HTTP interface that exposes tier configurations of scheduler.
   */
  @Path("/tiers")
  public class Tiers {
  
    private final TierManager tierManager;
  
    @Inject
    Tiers(TierManager tierManager) {
      this.tierManager = Objects.requireNonNull(tierManager);
    }
  
    /**
     * Dumps tier configuration file (tiers.json).
     *
     * @return HTTP response.
     */
    @GET
    @Produces(MediaType.APPLICATION_JSON)
    public Response getTiers() {
      ImmutableMap<String, Object> tierConfigurations = ImmutableMap.of(
          "default", tierManager.getDefaultTierName(),
          "tiers", tierManager.getTiers());
      return Response.ok(tierConfigurations).build();
    }
  }
  