103 lines
2.9 KiB
Java
103 lines
2.9 KiB
Java
/**
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* Copyright © 2016-2020 The Thingsboard Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.thingsboard.mqtt;
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import io.netty.channel.EventLoop;
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import io.netty.handler.codec.mqtt.MqttSubscribeMessage;
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import io.netty.util.concurrent.Promise;
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import java.util.HashSet;
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import java.util.Set;
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import java.util.function.Consumer;
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final class MqttPendingSubscription {
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private final Promise<Void> future;
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private final String topic;
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private final Set<MqttPendingHandler> handlers = new HashSet<>();
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private final MqttSubscribeMessage subscribeMessage;
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private final RetransmissionHandler<MqttSubscribeMessage> retransmissionHandler = new RetransmissionHandler<>();
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private boolean sent = false;
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MqttPendingSubscription(Promise<Void> future, String topic, MqttSubscribeMessage message) {
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this.future = future;
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this.topic = topic;
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this.subscribeMessage = message;
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this.retransmissionHandler.setOriginalMessage(message);
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}
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Promise<Void> getFuture() {
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return future;
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}
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String getTopic() {
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return topic;
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}
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boolean isSent() {
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return sent;
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}
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void setSent(boolean sent) {
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this.sent = sent;
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}
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MqttSubscribeMessage getSubscribeMessage() {
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return subscribeMessage;
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}
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void addHandler(MqttHandler handler, boolean once){
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this.handlers.add(new MqttPendingHandler(handler, once));
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}
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Set<MqttPendingHandler> getHandlers() {
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return handlers;
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}
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void startRetransmitTimer(EventLoop eventLoop, Consumer<Object> sendPacket) {
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if(this.sent){ //If the packet is sent, we can start the retransmit timer
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this.retransmissionHandler.setHandle((fixedHeader, originalMessage) ->
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sendPacket.accept(new MqttSubscribeMessage(fixedHeader, originalMessage.variableHeader(), originalMessage.payload())));
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this.retransmissionHandler.start(eventLoop);
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}
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}
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void onSubackReceived(){
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this.retransmissionHandler.stop();
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}
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final class MqttPendingHandler {
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private final MqttHandler handler;
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private final boolean once;
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MqttPendingHandler(MqttHandler handler, boolean once) {
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this.handler = handler;
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this.once = once;
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}
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MqttHandler getHandler() {
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return handler;
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}
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boolean isOnce() {
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return once;
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}
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}
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}
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