57 lines
1.7 KiB
Groovy
57 lines
1.7 KiB
Groovy
@Grab(group='org.fusesource.mqtt-client', module='mqtt-client', version='1.10')
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import org.fusesource.mqtt.client.BlockingConnection
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import org.fusesource.mqtt.client.MQTT
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import org.fusesource.mqtt.client.Message
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import org.fusesource.mqtt.client.QoS
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import org.fusesource.mqtt.client.Topic
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import java.util.concurrent.TimeUnit
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String host = args.size() == 1 ? args[0] : "localhost"
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MQTT mqttSub = new MQTT()
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mqttSub.setHost(host, 1883)
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mqttSub.setClientId("Subscriber")
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mqttSub.cleanSession = false
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//AT_MOST_ONCE,
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//AT_LEAST_ONCE,
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//EXACTLY_ONCE
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BlockingConnection clientSub = mqttSub.blockingConnection()
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clientSub.connect()
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println "Sub connected"
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Topic[] overlappingSubscriptions = [new Topic("a/+", QoS.EXACTLY_ONCE),
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new Topic("a/b", QoS.AT_LEAST_ONCE)]
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byte[] qoses = clientSub.subscribe(overlappingSubscriptions)
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println "Sub subscribed"
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MQTT mqttPub = new MQTT()
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mqttPub.setHost(host, 1883)
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mqttPub.setClientId("Publisher")
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mqttPub.cleanSession = false
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BlockingConnection clientPub = mqttPub.blockingConnection()
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clientPub.connect()
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println "Pub connected"
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clientPub.publish("a/b", "Hello world".bytes, QoS.AT_LEAST_ONCE, false)
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println "Pub published"
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Message msg = clientSub.receive()
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println "Sub received message \n\t Topic: ${msg.topic}, payload: ${new String(msg.payload)}"
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msg.ack()
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//try to receive another NOT want publish
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msg = clientSub.receive(1, TimeUnit.SECONDS)
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if (msg != null) {
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println "Second possible message, payload: ${new String(msg.payload)}, topic: ${msg.topic}"
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}
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clientPub.disconnect()
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clientPub.kill()
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println "Pub disconnected"
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clientSub.disconnect()
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clientSub.kill()
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println "Sub disconnected"
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println "Finished!!\n\n"
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