MQTT event publisher is used to send events to a MQTT broker based on the configurations you provide. You can configure it with XML, JSON, and text output mapping types.
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Prerequisites
Follow the steps below before starting the MQTT event publisher configuration.
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Adapter Property | Description | Configuration file property | Example |
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Client Id | Client identifier is used by the server to identify a client when it reconnects, It used for durable subscriptions or reliable delivery of messages is required | clientId | test-client |
Broker Url | MQTT broker URL. The same URL can be used f or WSO2 MB when offset=0 | url | tcp://localhost:1883 |
| Username | Username of the broker | username | mqtt-user |
| Password | Password of the broker | password | mqtt-password |
| Clean Session | Whether to persist topic subscriptions and acknowledge positions across client sessions | cleanSession | true/false |
| Quality of Service | Quality of service for delivering messages between clients and servers. There are three QoS levels in MQTT are as follows.
| qos | 0,1,2 |
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Adapter Property | Description | Configuration file property | Example |
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Topic | The topic that will be used to send messages to MQTT broker. | topic | sensordata |
Related samples
For more information on mqtt event publisher type, see the following sample in WSO2 CEP Documentation.