content: /*
   * 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
   *
   *     https://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.avro.ipc;
  
  import java.io.IOException;
  import java.nio.ByteBuffer;
  import java.util.List;
  
  import javax.servlet.ServletException;
  import javax.servlet.http.HttpServlet;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  import org.apache.avro.AvroRuntimeException;
  
  /** An {@link HttpServlet} that responds to Avro RPC requests. */
  public class ResponderServlet extends HttpServlet {
    private Responder responder;
  
    public ResponderServlet(Responder responder) throws IOException {
      this.responder = responder;
    }
  
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
      response.setContentType(HttpTransceiver.CONTENT_TYPE);
      List<ByteBuffer> requestBufs = HttpTransceiver.readBuffers(request.getInputStream());
      try {
        List<ByteBuffer> responseBufs = responder.respond(requestBufs);
        response.setContentLength(HttpTransceiver.getLength(responseBufs));
        HttpTransceiver.writeBuffers(responseBufs, response.getOutputStream());
      } catch (AvroRuntimeException e) {
        throw new ServletException(e);
      }
    }
  }
  