69 lines
2.3 KiB
Groovy
69 lines
2.3 KiB
Groovy
@GrabResolver(name='Paho', root='https://repo.eclipse.org/content/repositories/paho-releases/')
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@Grab(group='org.eclipse.paho', module='mqtt-client', version='0.4.0')
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import org.eclipse.paho.client.mqttv3.MqttClient
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import org.eclipse.paho.client.mqttv3.MqttMessage
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import org.eclipse.paho.client.mqttv3.MqttException
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import org.eclipse.paho.client.mqttv3.MqttCallback
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import org.eclipse.paho.client.mqttv3.IMqttDeliveryToken
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import org.eclipse.paho.client.mqttv3.persist.MqttDefaultFilePersistence
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import java.util.concurrent.CountDownLatch
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import java.util.concurrent.TimeUnit
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class SubscriberCallback implements MqttCallback {
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int m_numReceived = 0
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long m_startTime
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boolean firstMessageReceived = false
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private CountDownLatch m_latch = new CountDownLatch(1)
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void waitFinish() {
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m_latch.await()
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}
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public void connectionLost(Throwable cause) {
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m_latch.countDown()
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}
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public void messageArrived(String topic, MqttMessage message) throws Exception {
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//println "Received message ${new String(message.payload)} on topic [${topic}]"
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if (!firstMessageReceived) {
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m_startTime = System.currentTimeMillis()
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firstMessageReceived = true
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}
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if (topic == "/exit") {
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long stopTime = System.currentTimeMillis()
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long spentTime = stopTime - m_startTime
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println "/exit received"
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println "subscriber disconnected, received ${m_numReceived} messages in ${spentTime} ms"
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client.disconnect()
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m_latch.countDown()
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} else {
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println "Received $message on topic $topic"
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m_numReceived++
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}
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}
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public void deliveryComplete(IMqttDeliveryToken token) {
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//To change body of implemented methods use File | Settings | File Templates.
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}
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}
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String host = args[0]
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String topicSubscription = args[1]
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String tmpDir = System.getProperty("java.io.tmpdir")
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MqttDefaultFilePersistence dataStore = new MqttDefaultFilePersistence(tmpDir)
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MqttClient client = new MqttClient("tcp://${host}:1883", "SubscriberClient", dataStore)
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def callback = new SubscriberCallback()
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client.callback = callback
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client.connect()
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client.subscribe(topicSubscription, 0)
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println "subscribed to $topicSubscription"
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client.subscribe("/exit", 0)
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println "subscribed to /exit"
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callback.waitFinish() |