| /* |
| * 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. |
| */ |
| package org.apache.calcite.avatica.remote; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.IOException; |
| import java.nio.charset.StandardCharsets; |
| |
| /** |
| * ProtobufService implementation that queries against a remote implementation, using |
| * protocol buffers as the serialized form. |
| */ |
| public class RemoteProtobufService extends ProtobufService { |
| private static final Logger LOG = LoggerFactory.getLogger(RemoteProtobufService.class); |
| |
| private final AvaticaHttpClient client; |
| private final ProtobufTranslation translation; |
| |
| public RemoteProtobufService(AvaticaHttpClient client, ProtobufTranslation translation) { |
| this.client = client; |
| this.translation = translation; |
| } |
| |
| @Override public Response _apply(Request request) { |
| final Response resp; |
| byte[] response = null; |
| try { |
| response = client.send(translation.serializeRequest(request)); |
| } catch (IOException e) { |
| LOG.debug("Failed to execute remote request: {}", request); |
| // Failed to get a response from the server for the request. |
| throw new RuntimeException(e); |
| } |
| |
| try { |
| resp = translation.parseResponse(response); |
| } catch (IOException e) { |
| LOG.debug("Failed to deserialize reponse to {}. '{}'", request, |
| new String(response, StandardCharsets.UTF_8)); |
| // Not a protobuf that we could parse. |
| throw new RuntimeException(e); |
| } |
| |
| // The server had an error, throw an Exception for that. |
| if (resp instanceof ErrorResponse) { |
| throw ((ErrorResponse) resp).toException(); |
| } |
| |
| return resp; |
| } |
| } |
| |
| // End RemoteProtobufService.java |