Java tutorial
/* * Copyright 2014 The Netty Project * * The Netty Project 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 io.netty.handler.codec.mqtt; import io.netty.buffer.ByteBuf; import io.netty.buffer.ByteBufHolder; import io.netty.util.IllegalReferenceCountException; /** * See <a href="http://public.dhe.ibm.com/software/dw/webservices/ws-mqtt/mqtt-v3r1.html#publish">MQTTV3.1/publish</a> */ public class MqttPublishMessage extends MqttMessage implements ByteBufHolder { public MqttPublishMessage(MqttFixedHeader mqttFixedHeader, MqttPublishVariableHeader variableHeader, ByteBuf payload) { super(mqttFixedHeader, variableHeader, payload); } @Override public MqttPublishVariableHeader variableHeader() { return (MqttPublishVariableHeader) super.variableHeader(); } @Override public ByteBuf payload() { return content(); } @Override public ByteBuf content() { final ByteBuf data = (ByteBuf) super.payload(); if (data.refCnt() <= 0) { throw new IllegalReferenceCountException(data.refCnt()); } return data; } @Override public MqttPublishMessage copy() { return replace(content().copy()); } @Override public MqttPublishMessage duplicate() { return replace(content().duplicate()); } @Override public MqttPublishMessage retainedDuplicate() { return replace(content().retainedDuplicate()); } @Override public MqttPublishMessage replace(ByteBuf content) { return new MqttPublishMessage(fixedHeader(), variableHeader(), content); } @Override public int refCnt() { return content().refCnt(); } @Override public MqttPublishMessage retain() { content().retain(); return this; } @Override public MqttPublishMessage retain(int increment) { content().retain(increment); return this; } @Override public MqttPublishMessage touch() { content().touch(); return this; } @Override public MqttPublishMessage touch(Object hint) { content().touch(hint); return this; } @Override public boolean release() { return content().release(); } @Override public boolean release(int decrement) { return content().release(decrement); } }