| /* |
| * 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.tinkerpop.gremlin.driver.handler; |
| |
| import io.netty.buffer.ByteBufInputStream; |
| import io.netty.channel.ChannelHandler; |
| import io.netty.channel.ChannelHandlerContext; |
| import io.netty.handler.codec.MessageToMessageDecoder; |
| import io.netty.handler.codec.http.FullHttpResponse; |
| import io.netty.handler.codec.http.HttpResponseStatus; |
| import org.apache.tinkerpop.gremlin.driver.MessageSerializer; |
| import org.apache.tinkerpop.gremlin.driver.Tokens; |
| import org.apache.tinkerpop.gremlin.driver.message.ResponseMessage; |
| import org.apache.tinkerpop.gremlin.driver.message.ResponseStatusCode; |
| import org.apache.tinkerpop.gremlin.driver.ser.SerTokens; |
| import org.apache.tinkerpop.shaded.jackson.databind.JsonNode; |
| import org.apache.tinkerpop.shaded.jackson.databind.ObjectMapper; |
| |
| import java.util.List; |
| import java.util.UUID; |
| |
| /** |
| * Converts {@code HttpResponse} to a {@link ResponseMessage}. |
| */ |
| @ChannelHandler.Sharable |
| public final class HttpGremlinResponseDecoder extends MessageToMessageDecoder<FullHttpResponse> { |
| private final MessageSerializer<?> serializer; |
| private final ObjectMapper mapper = new ObjectMapper(); |
| |
| public HttpGremlinResponseDecoder(final MessageSerializer<?> serializer) { |
| this.serializer = serializer; |
| } |
| |
| @Override |
| protected void decode(final ChannelHandlerContext channelHandlerContext, final FullHttpResponse httpResponse, final List<Object> objects) throws Exception { |
| if (httpResponse.status() == HttpResponseStatus.OK) { |
| objects.add(serializer.deserializeResponse(httpResponse.content())); |
| } else { |
| final JsonNode root = mapper.readTree(new ByteBufInputStream(httpResponse.content())); |
| objects.add(ResponseMessage.build(UUID.fromString(root.get(Tokens.REQUEST_ID).asText())) |
| .code(ResponseStatusCode.SERVER_ERROR) |
| .statusMessage(root.get(SerTokens.TOKEN_MESSAGE).asText()) |
| .create()); |
| } |
| } |
| } |