use of software.amazon.awssdk.iot.iotjobs.model.NextJobExecutionChangedEvent in project aws-iot-device-sdk-java-v2 by aws.
the class IotJobsClient method SubscribeToNextJobExecutionChangedEvents.
/**
* Once subscribed, `handler` is invoked each time a message matching
* the `topic` is received. It is possible for such messages to arrive before
* the SUBACK is received.
*
* AWS documentation: https://docs.aws.amazon.com/iot/latest/developerguide/jobs-api.html#mqtt-nextjobexecutionchanged
*
* @param request Subscription request configuration
* @param qos Maximum requested QoS that server may use when sending messages to the client.
* The server may grant a lower QoS in the SUBACK
* @param handler callback function to invoke with messages received on the subscription topic
* @param exceptionHandler callback function to invoke if an exception occurred deserializing a message
*
* @return a future containing the MQTT packet id used to perform the subscribe operation
*/
public CompletableFuture<Integer> SubscribeToNextJobExecutionChangedEvents(NextJobExecutionChangedSubscriptionRequest request, QualityOfService qos, Consumer<NextJobExecutionChangedEvent> handler, Consumer<Exception> exceptionHandler) {
String topic = "$aws/things/{thingName}/jobs/notify-next";
if (request.thingName == null) {
CompletableFuture<Integer> result = new CompletableFuture<Integer>();
result.completeExceptionally(new MqttException("NextJobExecutionChangedSubscriptionRequest must have a non-null thingName"));
return result;
}
topic = topic.replace("{thingName}", request.thingName);
Consumer<MqttMessage> messageHandler = (message) -> {
try {
String payload = new String(message.getPayload(), StandardCharsets.UTF_8);
NextJobExecutionChangedEvent response = gson.fromJson(payload, NextJobExecutionChangedEvent.class);
handler.accept(response);
} catch (Exception e) {
if (exceptionHandler != null) {
exceptionHandler.accept(e);
}
}
};
return connection.subscribe(topic, qos, messageHandler);
}
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