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Java MQTT Client

joynr supports the HiveMQ MQTT Client with MQTT v5 protocol as transport layer.

JEE applications

HiveMQ MQTT client is automatically used by the JEE Integration.

Pure Java applications

For pure Java applications please include the following dependency in your application (Maven dependency syntax shown):

	<dependency>
		<groupId>io.joynr.java.messaging.mqtt</groupId>
		<artifactId>hivemq-mqtt-client</artifactId>
		<version>${joynr.version}</version>
	</dependency>

Configuration

For detailed info about MQTT related configuration settings please refer to Java ConfigurationReference.

The following is a list of supported settings:

  • MqttModule.PROPERTY_KEY_MQTT_RECONNECT_SLEEP_MS
  • MqttModule.PROPERTY_MQTT_BROKER_URIS
  • MqttModule.MQTT_BROKER_URI_ARRAY
  • MqttModule.MQTT_GBID_TO_BROKERURI_MAP
  • MqttModule.PROPERTY_KEY_MQTT_CLIENT_ID_PREFIX
  • MqttModule.PROPERTY_KEY_MQTT_KEEP_ALIVE_TIMERS_SEC
  • MqttModule.MQTT_TO_KEEP_ALIVE_TIMER_SEC_MAP
  • MqttModule.PROPERTY_KEY_MQTT_CONNECTION_TIMEOUTS_SEC
  • MqttModule.MQTT_GBID_TO_CONNECTION_TIMEOUT_SEC_MAP
  • MqttModule.PROPERTY_KEY_MQTT_KEYSTORE_PATH
  • MqttModule.PROPERTY_KEY_MQTT_TRUSTSTORE_PATH
  • MqttModule.PROPERTY_KEY_MQTT_KEYSTORE_TYPE
  • MqttModule.PROPERTY_KEY_MQTT_TRUSTSTORE_TYPE
  • MqttModule.PROPERTY_KEY_MQTT_KEYSTORE_PWD
  • MqttModule.PROPERTY_KEY_MQTT_TRUSTSTORE_PWD
  • MqttModule.PROPERTY_KEY_MQTT_CIPHERSUITES
  • MqttModule.MQTT_CIPHERSUITE_LIST
  • MqttModule.PROPERTY_KEY_MQTT_SEPARATE_CONNECTIONS
  • MqttModule.PROPERTY_KEY_MQTT_USERNAME
  • MqttModule.PROPERTY_KEY_MQTT_PASSWORD
  • MqttModule.PROPERTY_KEY_MQTT_DISABLE_HOSTNAME_VERIFICATION
  • MqttModule.PROPERTY_KEY_MQTT_RECEIVE_MAXIMUM
  • MqttModule.PROPERTY_KEY_MQTT_CONNECT_ON_START
  • MqttModule.PROPERTY_KEY_MQTT_RETAIN
  • MqttModule.PROPERTY_KEY_MQTT_ENABLE_SHARED_SUBSCRIPTIONS
  • MqttModule.PROPERTY_MQTT_CLEAN_SESSION