com.linkedin.restli.examples.greetings.server.PartialUpdateGreetingResource Maven / Gradle / Ivy

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/*
   Copyright (c) 2018 LinkedIn Corp.

   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 com.linkedin.restli.examples.greetings.server;

import com.linkedin.data.transform.DataProcessingException;
import com.linkedin.restli.common.HttpStatus;
import com.linkedin.restli.common.PatchRequest;
import com.linkedin.restli.examples.greetings.api.Greeting;
import com.linkedin.restli.examples.greetings.api.Tone;
import com.linkedin.restli.server.RestLiServiceException;
import com.linkedin.restli.server.UpdateEntityResponse;
import com.linkedin.restli.server.annotations.RestLiCollection;
import com.linkedin.restli.server.annotations.ReturnEntity;
import com.linkedin.restli.server.annotations.RestMethod;
import com.linkedin.restli.server.resources.KeyValueResource;
import com.linkedin.restli.server.util.PatchApplier;
import java.util.HashMap;
import java.util.Map;


/**
 * Resource for testing a PARTIAL_UPDATE method that returns the patched entity.
 *
 * @author Evan Williams
 */
@RestLiCollection(
    name = "partialUpdateGreeting",
    namespace = "com.linkedin.restli.examples.greetings.client",
    keyName = "key"
)
public class PartialUpdateGreetingResource implements KeyValueResource
{
  private static final int SIZE = 20;

  private static final Map _db = new HashMap<>();
  static
  {
    for (long i = 0; i < SIZE; i++)
    {
      _db.put(i, new Greeting().setId(i).setMessage("Message " + i).setTone(Tone.FRIENDLY));
    }
  }

  @ReturnEntity
  @RestMethod.PartialUpdate
  public UpdateEntityResponse partialUpdate(Long key, PatchRequest patch)
  {
    if (!_db.containsKey(key))
    {
      throw new RestLiServiceException(HttpStatus.S_404_NOT_FOUND);
    }

    Greeting greeting = _db.get(key);

    try
    {
      PatchApplier.applyPatch(greeting, patch);
    }
    catch (DataProcessingException e)
    {
      throw new RestLiServiceException(HttpStatus.S_400_BAD_REQUEST);
    }

    return new UpdateEntityResponse<>(HttpStatus.S_200_OK, greeting);
  }
}