MQTT event receiver is an internal event receiver that comes with WSO2 products. You can configure it with XML, JSON, and text input mapping types.
...
Follow the steps below before starting the MQTT event receiver configurations.
- Download MQTT client library (
mqtt-client-0.4.0.jar). - Add the JAR file to the
<PRODUCT_HOME>/repository/components/lib/directory. Configure WSO2 CEP by adding relevant jars to support MQTT transport.
- Start the MQTT-supported server.
...
For instructions on creating a MQTT event receiver, see Receiving Events. see Configuring Event Receivers.
Configuring adapter properties
...
Adapter Property | Description | Configuration file property | Example |
|---|---|---|---|
Topic | A valid name for the MQTT broker topic which is used to receive messages on the MQTT input event adapter. | topic | MQTTInputEventAdapter |
Broker Url | MQTT broker URL. You can use the same URL f or WSO2 MB (when offset is zero). | url | tcp://localhost:1883 |
| Username | A valid username for the broker connection. | username | mqtt-user |
| Password | A valid password for the broker connection. | password | mqtt-password |
| Clean Session | Persist topic subscriptions and acknowledge positions across client sessions. | cleanSession | true/false |
| Client Id | Unique client ID used by the server to identify a client when it reconnects. Used for durable subscriptions or reliable delivery of messages. | clientId | clientid |
Related samples
For more information on MQTT event receiver type, see the following sample.