Dataservices - Data Processing mit Microservices
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The document defines a Kubernetes deployment for an NGINX application with 3 replicas, a corresponding service using NodePort, and an ingress configuration for routing traffic. Additionally, it includes Java code for an MQTT listener that processes JSON payloads related to weather updates. Key elements of the code involve setting activation configuration properties and handling JSON data.
Dataservices - Data Processing mit Microservices
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- 24. apiVersion: extensions/v1beta1 kind: Deployment metadata: name: nginx spec: replicas: 3 strategy: type: RollingUpdate template: metadata: labels: app: nginx spec: containers: - name: nginx image: nginx:1.7.9 ports: - containerPort: 80 livenessProbe: ... readinessProbe: ... --- apiVersion: v1 kind: Service metadata: name: nginx labels: app: nginx namespace: default spec: type: NodePort ports: - port: 80 selector: app: nginx --- apiVersion: extensions/v1beta1 kind: Ingress metadata: name: nginx labels: app: nginx namespace: default spec: rules: - host: nginx.cloudkoffer http: paths: - path: / backend: serviceName: nginx servicePort: 80
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- 42. CDI Extensions Web Fragments Bean Validation 2.0 CDI 2.0 Managed Beans 1.0 JCA 1.7 JPA 2.2 JMS 2.0 JSP 2.3 EL 3.0 EJB 3.2 Batch 1.0 JSF 2.3 Interceptors 1.2 Mail 1.6 Common Annotations 1.3 JTA 1.2 JAX-WS 1.4 JAX-RS 2.1 Concurrency 1.0 JSON-P 1.1 JSON-B 1.0 WebSocket 1.1 JAPSIC 1.1 JACC 1.5 Security 1.0 Servlet 4.0 JCache 1.0
- 45. @MessageDriven(activationConfig = { @ActivationConfigProperty(propertyName = "serverURIs", propertyValue = "tcp://eclipse-mosquitto:1883"), @ActivationConfigProperty(propertyName = "cleanSession", propertyValue = "false"), @ActivationConfigProperty(propertyName = "automaticReconnect", propertyValue = "true"), @ActivationConfigProperty(propertyName = "filePersistence", propertyValue = "false"), @ActivationConfigProperty(propertyName = "connectionTimeout", propertyValue = "30"), @ActivationConfigProperty(propertyName = "maxInflight", propertyValue = "3"), @ActivationConfigProperty(propertyName = "keepAliveInterval", propertyValue = "5"), @ActivationConfigProperty(propertyName = "topicFilter", propertyValue = "de/qaware/oss/cloud/mqtt"), @ActivationConfigProperty(propertyName = "qos", propertyValue = "1") }) public class MqttSourceMDB implements MQTTListener { @OnMQTTMessage @TransactionAttribute(value = TransactionAttributeType.REQUIRED) @Transactional(Transactional.TxType.REQUIRED) public void onMQTTMessage(String topic, MqttMessage message) { JsonReader reader = Json.createReader(new ByteArrayInputStream(message.getPayload())); JsonObject jsonObject = reader.readObject(); // TODO do stuff with the JSON payload } }
- 46. JsonObject currentWeather = Json.createObjectBuilder() .add("city", “London") .add("weather", “Drizzle") .build(); StringWriter payload = new StringWriter(); JsonWriter jsonWriter = Json.createWriter(payload); jsonWriter.writeObject(currentWeather); TextMessage msg = session.createTextMessage(payload.toString()); msg.setJMSType("CurrentWeather"); msg.setStringProperty("contentType", "application/vnd.weather.v1+json"); @ActivationConfigProperty(propertyName = "messageSelector", propertyValue = "(JMSType = 'CurrentWeather') AND (contentType = 'application/vnd.weather.v1+json‘)“) JsonReader reader = Json.createReader(new StringReader(body)); JsonObject jsonObject = reader.readObject();