package org.apache.helix.controller.restlet;
   
   /*
    * 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 limitations
   * under the License.
   */
  
  import java.io.StringReader;
  import java.util.Map;
  import java.util.TreeMap;
  
  import org.apache.log4j.Logger;
  import org.codehaus.jackson.map.ObjectMapper;
  import org.codehaus.jackson.type.TypeReference;
  import org.restlet.data.Form;
  import org.restlet.data.MediaType;
  import org.restlet.data.Status;
  import org.restlet.resource.Representation;
  import org.restlet.resource.Resource;
  
  /**
   * REST resource for ZkPropertyTransfer server to receive PUT requests 
   * that submits ZNRecordUpdates
   * */
  public class ZNRecordUpdateResource  extends Resource
  {
    public static final String UPDATEKEY = "ZNRecordUpdate";
    private static Logger LOG = Logger.getLogger(ZNRecordUpdateResource.class);
    @Override
    public boolean allowGet()
    {
      return false;
    }
  
    @Override
    public boolean allowPost()
    {
      return false;
    }
  
    @Override
    public boolean allowPut()
    {
      return true;
    }
  
    @Override
    public boolean allowDelete()
    {
      return false;
    }
    
    @Override
    public void storeRepresentation(Representation entity)
    {
      try
      {
        ZKPropertyTransferServer server = ZKPropertyTransferServer.getInstance();
        
        Form form = new Form(entity);
        String jsonPayload = form.getFirstValue(UPDATEKEY, true);
        
        // Parse the map from zkPath --> ZNRecordUpdate from the payload
        StringReader sr = new StringReader(jsonPayload);
        ObjectMapper mapper = new ObjectMapper();
        TypeReference<TreeMap<String, ZNRecordUpdate>> typeRef =
            new TypeReference<TreeMap<String, ZNRecordUpdate>>()
            {
            };
        Map<String, ZNRecordUpdate> holderMap = mapper.readValue(sr, typeRef);
        // Enqueue the ZNRecordUpdate for sending
        for(ZNRecordUpdate holder : holderMap.values())
        {
          server.enqueueData(holder);
          LOG.info("Received " + holder.getPath() + " from " + getRequest().getClientInfo().getAddress());
        }
        getResponse().setStatus(Status.SUCCESS_OK);
      }
      catch(Exception e)
      {
        LOG.error("", e);
        getResponse().setStatus(Status.SERVER_ERROR_INTERNAL);
      }
    }
  }