| /* |
| * 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 org.apache.tinkerpop.gremlin.driver.MessageSerializer; |
| import org.apache.tinkerpop.gremlin.driver.exception.ResponseException; |
| import org.apache.tinkerpop.gremlin.driver.message.RequestMessage; |
| import org.apache.tinkerpop.gremlin.driver.message.ResponseStatusCode; |
| import org.apache.tinkerpop.gremlin.driver.ser.MessageTextSerializer; |
| import io.netty.buffer.ByteBuf; |
| import io.netty.channel.ChannelHandler; |
| import io.netty.channel.ChannelHandlerContext; |
| import io.netty.handler.codec.MessageToByteEncoder; |
| import io.netty.util.CharsetUtil; |
| import org.apache.tinkerpop.gremlin.driver.simple.WebSocketClient; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * @author Stephen Mallette (http://stephen.genoprime.com) |
| * @deprecated As of release 3.3.10, not replaced, use {@link WebSocketClient}. |
| */ |
| @Deprecated |
| public final class NioGremlinRequestEncoder extends MessageToByteEncoder<Object> { |
| private boolean binaryEncoding = false; |
| |
| private final MessageSerializer serializer; |
| |
| public NioGremlinRequestEncoder(final boolean binaryEncoding, final MessageSerializer serializer) { |
| this.binaryEncoding = binaryEncoding; |
| this.serializer = serializer; |
| } |
| |
| @Override |
| protected void encode(final ChannelHandlerContext channelHandlerContext, final Object msg, final ByteBuf byteBuf) throws Exception { |
| final RequestMessage requestMessage = (RequestMessage) msg; |
| try { |
| if (binaryEncoding) { |
| // wrap the serialized message/payload inside of a "frame". this works around the problem where |
| // the length of the payload is not encoded into the general protocol. that length isn't needed |
| // for websockets because under that protocol, the message is wrapped in a "websocket frame". this |
| // is not the optimal way to deal with this really, but it does prevent a protocol change in this |
| // immediate moment trying to get the NioChannelizer working. |
| final ByteBuf bytes = serializer.serializeRequestAsBinary(requestMessage, channelHandlerContext.alloc()); |
| byteBuf.writeInt(bytes.capacity()); |
| byteBuf.writeBytes(bytes); |
| } else { |
| final MessageTextSerializer textSerializer = (MessageTextSerializer) serializer; |
| final byte [] bytes = textSerializer.serializeRequestAsString(requestMessage).getBytes(CharsetUtil.UTF_8); |
| byteBuf.writeInt(bytes.length); |
| byteBuf.writeBytes(bytes); |
| } |
| } catch (Exception ex) { |
| throw new ResponseException(ResponseStatusCode.REQUEST_ERROR_SERIALIZATION, String.format( |
| "An error occurred during serialization of this request [%s] - it could not be sent to the server - Reason: %s", |
| requestMessage, ex)); |
| } |
| } |
| } |