Examples with PlcFieldConfig org.apache.plc4x.java.examples.connectivity.mqtt.model.PlcFieldConfig used on opensource projects

Example 1 with PlcFieldConfig

use of org.apache.plc4x.java.examples.connectivity.mqtt.model.PlcFieldConfig in project plc4x by apache.

the class MqttConnector method run.

private void run() throws PlcException {
    // Create a new MQTT client.
    final Mqtt3RxClient client = MqttClient.builder().identifier(UUID.randomUUID().toString()).serverHost(config.getMqttConfig().getServerHost()).serverPort(config.getMqttConfig().getServerPort()).useMqttVersion3().buildRx();
    // Connect to the MQTT broker.
    final Single<Mqtt3ConnAck> connAckSingle = client.connect().timeout(10, TimeUnit.SECONDS);
    // Connect to the PLC.
    try (PlcConnection plcConnection = new PlcDriverManager().getConnection(config.getPlcConfig().getConnection())) {
        // Check if this connection support reading of data.
        if (!plcConnection.getMetadata().canRead()) {
            System.err.println("This connection doesn't support reading.");
            return;
        }
        // Create a new read request.
        PlcReadRequest.Builder builder = plcConnection.readRequestBuilder();
        for (PlcFieldConfig fieldConfig : config.getPlcConfig().getPlcFields()) {
            builder = builder.addItem(fieldConfig.getName(), fieldConfig.getAddress());
        }
        PlcReadRequest readRequest = builder.build();
        // Send a message containing the PLC read response.
        Flowable<Mqtt3Publish> messagesToPublish = Flowable.generate(emitter -> {
            PlcReadResponse response = readRequest.execute().get();
            String jsonPayload = getPayload(response);
            final Mqtt3Publish publishMessage = Mqtt3Publish.builder().topic(config.getMqttConfig().getTopicName()).qos(MqttQos.AT_LEAST_ONCE).payload(jsonPayload.getBytes()).build();
            emitter.onNext(publishMessage);
        });
        // Emit 1 message only every 100 milliseconds.
        messagesToPublish = messagesToPublish.zipWith(Flowable.interval(config.getPollingInterval(), TimeUnit.MILLISECONDS), (publish, aLong) -> publish);
        final Single<Mqtt3ConnAck> connectScenario = connAckSingle.doOnSuccess(connAck -> System.out.println("Connected with return code " + connAck.getReturnCode())).doOnError(throwable -> System.out.println("Connection failed, " + throwable.getMessage()));
        final Flowable<Mqtt3PublishResult> publishScenario = client.publish(messagesToPublish).doOnNext(publishResult -> System.out.println("Publish acknowledged: " + new String(publishResult.getPublish().getPayloadAsBytes())));
        connectScenario.toCompletable().andThen(publishScenario).blockingSubscribe();
    } catch (Exception e) {
        throw new PlcException("Error creating connection to " + config.getPlcConfig().getConnection(), e);
    }
}