BaseRestServer.java

/*
   Copyright (c) 2012 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.server;


import com.linkedin.common.callback.Callback;
import com.linkedin.r2.message.RequestContext;
import com.linkedin.r2.message.rest.RestRequest;
import com.linkedin.r2.message.rest.RestResponse;
import com.linkedin.r2.message.stream.StreamRequest;
import com.linkedin.r2.message.stream.StreamResponse;
import com.linkedin.r2.transport.common.RestRequestHandler;
import com.linkedin.r2.transport.common.StreamRequestHandler;
import com.linkedin.restli.internal.server.model.ResourceModel;

import java.util.Map;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;


/**
 * @author dellamag
 */
public abstract class BaseRestServer implements RestRequestHandler, StreamRequestHandler
{
  private static final Logger log = LoggerFactory.getLogger(BaseRestServer.class);

  private final RestLiConfig _config;
  protected Map<String, ResourceModel> _rootResources;

  public BaseRestServer(final RestLiConfig config)
  {
    _config = config;
  }

  /**
   * @see com.linkedin.r2.transport.common.RestRequestHandler#handleRequest(com.linkedin.r2.message.rest.RestRequest,
   *      com.linkedin.r2.message.RequestContext, com.linkedin.common.callback.Callback)
   */
  @Override
  public void handleRequest(final RestRequest request, final RequestContext requestContext,
                            final Callback<RestResponse> callback)
  {
    try
    {
      doHandleRequest(request, requestContext, callback);
    }
    catch (Exception e)
    {
      log.error("Uncaught exception", e);
      callback.onError(e);
    }
  }

  protected abstract void doHandleRequest(RestRequest request,
                                          RequestContext requestContext,
                                          Callback<RestResponse> callback);

  /**
   * @see com.linkedin.r2.transport.common.StreamRequestHandler#handleRequest(com.linkedin.r2.message.stream.StreamRequest,
   *      com.linkedin.r2.message.RequestContext, com.linkedin.common.callback.Callback)
   */
  @Override
  public void handleRequest(StreamRequest request, RequestContext requestContext, Callback<StreamResponse> callback)
  {
    try
    {
      doHandleStreamRequest(request, requestContext, callback);
    }
    catch (Exception e)
    {
      log.error("Uncaught exception", e);
      callback.onError(e);
    }
  }

  protected abstract void doHandleStreamRequest(StreamRequest request,
                                                RequestContext requestContext,
                                                Callback<StreamResponse> callback);

  protected RestLiConfig getConfig()
  {
    return _config;
  }
}