| /* |
| * 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.nifi.processors.standard.relp.frame; |
| |
| import io.netty.buffer.Unpooled; |
| import io.netty.channel.ChannelHandler; |
| import io.netty.channel.ChannelHandlerContext; |
| import io.netty.channel.SimpleChannelInboundHandler; |
| import org.apache.nifi.processors.standard.relp.event.RELPMessage; |
| import org.apache.nifi.processors.standard.relp.response.RELPChannelResponse; |
| import org.apache.nifi.processors.standard.relp.response.RELPResponse; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.nio.charset.Charset; |
| import java.util.concurrent.BlockingQueue; |
| |
| /** |
| * Decode data received into a RELPMessage |
| */ |
| @ChannelHandler.Sharable |
| public class RELPMessageChannelHandler extends SimpleChannelInboundHandler<RELPMessage> { |
| |
| private static final Logger LOGGER = LoggerFactory.getLogger(RELPMessageChannelHandler.class); |
| private final BlockingQueue<RELPMessage> events; |
| private final RELPEncoder encoder; |
| |
| public RELPMessageChannelHandler(BlockingQueue<RELPMessage> events, final Charset charset) { |
| this.events = events; |
| this.encoder = new RELPEncoder(charset); |
| } |
| |
| @Override |
| protected void channelRead0(ChannelHandlerContext ctx, RELPMessage msg) { |
| LOGGER.debug("RELP Message Received Length [{}] Remote Address [{}] ", msg.getMessage().length, msg.getSender()); |
| if (events.offer(msg)) { |
| LOGGER.debug("Event Queued: RELP Message Sender [{}] Transaction Number [{}]", msg.getSender(), msg.getTxnr()); |
| ctx.writeAndFlush(Unpooled.wrappedBuffer(new RELPChannelResponse(encoder, RELPResponse.ok(msg.getTxnr())).toByteArray())); |
| } else { |
| LOGGER.debug("Event Queue Full: Failed RELP Message Sender [{}] Transaction Number [{}]", msg.getSender(), msg.getTxnr()); |
| ctx.writeAndFlush(Unpooled.wrappedBuffer(new RELPChannelResponse(encoder, RELPResponse.serverFullError(msg.getTxnr())).toByteArray())); |
| } |
| } |
| } |