Examples with ApplicationClient org.eclipse.hono.application.client.ApplicationClient used on opensource projects

Example 1 with ApplicationClient

use of org.eclipse.hono.application.client.ApplicationClient in project hono by eclipse.

the class HonoExampleApplicationBase method consumeData.

/**
 * Start the application client and set the message handling method to treat data that is received.
 */
protected void consumeData() {
    final CompletableFuture<ApplicationClient<? extends MessageContext>> startup = new CompletableFuture<>();
    if (client instanceof AmqpApplicationClient) {
        final AmqpApplicationClient ac = (AmqpApplicationClient) client;
        ac.addDisconnectListener(c -> LOG.info("lost connection to Hono, trying to reconnect ..."));
        ac.addReconnectListener(c -> LOG.info("reconnected to Hono"));
    }
    client.start().compose(v -> CompositeFuture.all(createEventConsumer(), createTelemetryConsumer())).onSuccess(ok -> startup.complete(client)).onFailure(startup::completeExceptionally);
    try {
        startup.join();
        LOG.info("Consumer ready for telemetry and event messages");
        System.in.read();
    } catch (final CompletionException e) {
        LOG.error("{} consumer failed to start [{}:{}]", USE_KAFKA ? "Kafka" : "AMQP", HonoExampleConstants.HONO_MESSAGING_HOST, port, e.getCause());
    } catch (final IOException e) {
    // nothing we can do
    }
    final CompletableFuture<ApplicationClient<? extends MessageContext>> shutDown = new CompletableFuture<>();
    @SuppressWarnings("rawtypes") final List<Future> closeFutures = new ArrayList<>();
    Optional.ofNullable(eventConsumer).map(MessageConsumer::close).ifPresent(closeFutures::add);
    Optional.ofNullable(telemetryConsumer).map(MessageConsumer::close).ifPresent(closeFutures::add);
    Optional.ofNullable(client).map(Lifecycle::stop).ifPresent(closeFutures::add);
    CompositeFuture.join(closeFutures).compose(ok -> vertx.close()).recover(t -> vertx.close()).onComplete(ar -> shutDown.complete(client));
    // wait for clients to be closed
    shutDown.join();
    LOG.info("Consumer has been shut down");
}