Examples with ShadowDeltaUpdatedEvent software.amazon.awssdk.iot.iotshadow.model.ShadowDeltaUpdatedEvent used on opensource projects

Example 1 with ShadowDeltaUpdatedEvent

use of software.amazon.awssdk.iot.iotshadow.model.ShadowDeltaUpdatedEvent in project aws-iot-device-sdk-java-v2 by aws.

the class IotShadowClient method SubscribeToNamedShadowDeltaUpdatedEvents.

/**
 * Subscribe to NamedShadowDelta events for a named shadow of an AWS IoT thing.
 *
 * 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/device-shadow-mqtt.html#update-delta-pub-sub-topic
 *
 * @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> SubscribeToNamedShadowDeltaUpdatedEvents(NamedShadowDeltaUpdatedSubscriptionRequest request, QualityOfService qos, Consumer<ShadowDeltaUpdatedEvent> handler, Consumer<Exception> exceptionHandler) {
    String topic = "$aws/things/{thingName}/shadow/name/{shadowName}/update/delta";
    if (request.thingName == null) {
        CompletableFuture<Integer> result = new CompletableFuture<Integer>();
        result.completeExceptionally(new MqttException("NamedShadowDeltaUpdatedSubscriptionRequest must have a non-null thingName"));
        return result;
    }
    topic = topic.replace("{thingName}", request.thingName);
    if (request.shadowName == null) {
        CompletableFuture<Integer> result = new CompletableFuture<Integer>();
        result.completeExceptionally(new MqttException("NamedShadowDeltaUpdatedSubscriptionRequest must have a non-null shadowName"));
        return result;
    }
    topic = topic.replace("{shadowName}", request.shadowName);
    Consumer<MqttMessage> messageHandler = (message) -> {
        try {
            String payload = new String(message.getPayload(), StandardCharsets.UTF_8);
            ShadowDeltaUpdatedEvent response = gson.fromJson(payload, ShadowDeltaUpdatedEvent.class);
            handler.accept(response);
        } catch (Exception e) {
            if (exceptionHandler != null) {
                exceptionHandler.accept(e);
            }
        }
    };
    return connection.subscribe(topic, qos, messageHandler);
}

Example 2 with ShadowDeltaUpdatedEvent

use of software.amazon.awssdk.iot.iotshadow.model.ShadowDeltaUpdatedEvent in project aws-iot-device-sdk-java-v2 by aws.

the class IotShadowClient method SubscribeToShadowDeltaUpdatedEvents.

/**
 * Subscribe to ShadowDelta events for the (classic) shadow of an AWS IoT thing.
 *
 * 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/device-shadow-mqtt.html#update-delta-pub-sub-topic
 *
 * @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> SubscribeToShadowDeltaUpdatedEvents(ShadowDeltaUpdatedSubscriptionRequest request, QualityOfService qos, Consumer<ShadowDeltaUpdatedEvent> handler, Consumer<Exception> exceptionHandler) {
    String topic = "$aws/things/{thingName}/shadow/update/delta";
    if (request.thingName == null) {
        CompletableFuture<Integer> result = new CompletableFuture<Integer>();
        result.completeExceptionally(new MqttException("ShadowDeltaUpdatedSubscriptionRequest 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);
            ShadowDeltaUpdatedEvent response = gson.fromJson(payload, ShadowDeltaUpdatedEvent.class);
            handler.accept(response);
        } catch (Exception e) {
            if (exceptionHandler != null) {
                exceptionHandler.accept(e);
            }
        }
    };
    return connection.subscribe(topic, qos, messageHandler);
}