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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,35 @@ | ||
| <?xml version="1.0" encoding="UTF-8" standalone="no"?> | ||
| <object class="300" name="MqttSubscription" version="1"> | ||
| <features> | ||
| <feature get="true" index="0" name="Topic" set="true" type="str" unit="string"> | ||
| <hint lang="pl" value="Topic"/> | ||
| <hint lang="en" value="Topic"/> | ||
| <desc resKey="mqttsubscription_topic"/> | ||
| </feature> | ||
| <feature get="true" index="1" name="Message" set="false" type="str" unit="string"> | ||
| <hint lang="pl" value="Zawartość wiadomości MQTT"/> | ||
| <hint lang="en" value="The content of MQTT message"/> | ||
| <desc resKey="mqttsubscription_message"/> | ||
| </feature> | ||
| </features> | ||
| <methods> | ||
| <method call="set" index="0" name="SetTopic" return="void"> | ||
| <param name="Topic" type="str" unit="string"/> | ||
| <hint lang="pl" value="Zmienia topic"/> | ||
| <hint lang="en" value="Changes topic"/> | ||
| <desc resKey="mqttsubscription_settopic"/> | ||
| </method> | ||
| <method call="execute" index="0" name="NextMessage" return="void"> | ||
| <hint lang="pl" value="Oznacza wiadomość jako otrzymaną"/> | ||
| <hint lang="en" value="Marks message as received"/> | ||
| <desc resKey="mqttsubscription_nextmessage"/> | ||
| </method> | ||
| </methods> | ||
| <events> | ||
| <event address="0" name="OnMessage"> | ||
| <hint lang="pl" value="Zdarzenie wywoływane w momencie otrzymania wiadomości"/> | ||
| <hint lang="en" value="Event occurring when the message is received"/> | ||
| <desc resKey="mqttsubscription_onmessage"/> | ||
| </event> | ||
| </events> | ||
| </object> |
72 changes: 72 additions & 0 deletions
72
vclu/src/main/java/pl/psobiech/opengr8on/vclu/MqttSubscription.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,72 @@ | ||
| /* | ||
| * OpenGr8on, open source extensions to systems based on Grenton devices | ||
| * Copyright (C) 2023 Piotr Sobiech | ||
| * | ||
| * This program is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation, either version 3 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with this program. If not, see <https://www.gnu.org/licenses/>. | ||
| */ | ||
|
|
||
| package pl.psobiech.opengr8on.vclu; | ||
|
|
||
| import java.util.concurrent.LinkedBlockingDeque; | ||
|
|
||
| import org.luaj.vm2.LuaValue; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
|
|
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| public class MqttSubscription extends VirtualObject { | ||
| private static final Logger LOGGER = LoggerFactory.getLogger(MqttSubscription.class); | ||
|
|
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| private final LinkedBlockingDeque<byte[]> messageQueue = new LinkedBlockingDeque<>(); | ||
|
|
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| public MqttSubscription(String name) { | ||
| super(name); | ||
|
|
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| methodFunctions.put(0, this::onNextMessage); // mqttsubscription_nextmessage | ||
| } | ||
|
|
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| private LuaValue onNextMessage(LuaValue arg1) { | ||
| featureValues.remove(1); | ||
|
|
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| return LuaValue.NIL; | ||
| } | ||
|
|
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| public String getTopic() { | ||
| return String.valueOf(featureValues.get(0).checkstring()); | ||
| } | ||
|
|
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| public void enqueueMessage(int id, byte[] payload) { | ||
| while (!messageQueue.offer(payload)) { | ||
| // TODO: retry/fail logic | ||
| Thread.yield(); | ||
| } | ||
| } | ||
|
|
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| @Override | ||
| public void loop() { | ||
| final LuaValue currentPayload = featureValues.get(1); // mqttsubscription_message | ||
| if (currentPayload == null) { | ||
| final byte[] payload = messageQueue.poll(); | ||
| if (payload != null) { | ||
| featureValues.put(1, LuaValue.valueOf(new String(payload))); | ||
|
|
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| triggerEvent(0); // mqttsubscription_onmessage | ||
| } | ||
| } | ||
| } | ||
|
|
||
| @Override | ||
| public void close() { | ||
| // NOP | ||
| } | ||
| } |
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