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

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/*
 * Copyright (c) 2017 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.common.callback.Callback;
import com.linkedin.data.ByteString;
import com.linkedin.entitystream.EntityStreams;
import com.linkedin.entitystream.SingletonWriter;
import com.linkedin.entitystream.Writer;
import com.linkedin.restli.common.CompoundKey;
import com.linkedin.restli.common.HttpStatus;
import com.linkedin.restli.server.CreateResponse;
import com.linkedin.restli.server.UnstructuredDataReactiveReader;
import com.linkedin.restli.server.UnstructuredDataReactiveResult;
import com.linkedin.restli.server.UpdateResponse;
import com.linkedin.restli.server.annotations.CallbackParam;
import com.linkedin.restli.server.annotations.Key;
import com.linkedin.restli.server.annotations.RestLiAssociation;
import com.linkedin.restli.server.annotations.UnstructuredDataReactiveReaderParam;
import com.linkedin.restli.server.resources.unstructuredData.UnstructuredDataAssociationResourceReactiveTemplate;

import static com.linkedin.restli.examples.greetings.server.GreetingUnstructuredDataUtils.MIME_TYPE;
import static com.linkedin.restli.examples.greetings.server.GreetingUnstructuredDataUtils.UNSTRUCTURED_DATA_BYTES;


/**
 * This resource models an association resource that reactively streams unstructured data response.
 *
 * For more comprehensive examples, look at {@link GreetingUnstructuredDataCollectionResourceReactive}
 */
@RestLiAssociation(
  name = "reactiveGreetingAssociationUnstructuredData",
  namespace = "com.linkedin.restli.examples.greetings.client",
  assocKeys = {
    @Key(name = "src", type = String.class),
    @Key(name = "dest", type = String.class)
  }
)
public class GreetingUnstructuredDataAssociationResourceReactive extends UnstructuredDataAssociationResourceReactiveTemplate
{
  @Override
  public void get(CompoundKey key, @CallbackParam Callback callback)
  {
    Writer writer = new SingletonWriter<>(ByteString.copy(UNSTRUCTURED_DATA_BYTES));
    callback.onSuccess(new UnstructuredDataReactiveResult(EntityStreams.newEntityStream(writer), MIME_TYPE));
  }

  @Override
  public void create(@UnstructuredDataReactiveReaderParam UnstructuredDataReactiveReader reader, @CallbackParam Callback responseCallback)
  {
    reader.getEntityStream().setReader(new GreetingUnstructuredDataReader(responseCallback)
    {
      @Override
      CreateResponse buildResponse()
      {
        return new CreateResponse(1);
      }
    });
  }

  @Override
  public void update(CompoundKey key, @UnstructuredDataReactiveReaderParam UnstructuredDataReactiveReader reader, @CallbackParam final Callback responseCallback)
  {
    reader.getEntityStream().setReader(new GreetingUnstructuredDataReader(responseCallback)
    {
      @Override
      UpdateResponse buildResponse()
      {
        return new UpdateResponse(HttpStatus.S_200_OK);
      }
    });
  }

  @Override
  public void delete(CompoundKey key, @CallbackParam Callback callback)
  {
    callback.onSuccess(new UpdateResponse(HttpStatus.S_200_OK));
  }
}