introduce JMS queue

src/de/hottis/MeasurementCollector/ADataObject.java

@@ -1,12 +1,15 @@
 package de.hottis.MeasurementCollector;
 
+import java.io.Serializable;
 import java.time.LocalDateTime;
 import java.util.Map;
 
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
-public abstract class ADataObject {
+public abstract class ADataObject implements Serializable {
+	private static final long serialVersionUID = 1L;
+
 	final protected Logger logger = LogManager.getRootLogger();
 
 	private LocalDateTime timestamp;

src/de/hottis/MeasurementCollector/AJmsQueue.java

@@ -0,0 +1,42 @@
+package de.hottis.MeasurementCollector;
+
+import javax.jms.Connection;
+import javax.jms.Destination;
+import javax.jms.JMSException;
+import javax.jms.Session;
+
+import org.apache.activemq.ActiveMQConnectionFactory;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+public abstract class AJmsQueue {
+	final protected Logger logger = LogManager.getRootLogger();
+
+	protected Connection connection;
+	protected Session session;
+	protected Destination destination;
+
+	public AJmsQueue() {
+
+	}
+
+
+	public void init() throws MeasurementCollectorException {
+		try {
+			ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory("tcp://localhost:61616");
+			logger.debug("connectionFactory: " + connectionFactory);
+			connection = connectionFactory.createConnection();
+			connection.start();
+			logger.debug("connection: " + connection);
+			session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
+			logger.debug("session: " + session);
+			destination = session.createQueue("TEST.FOO");
+			logger.debug("destination: " + destination);
+		} catch (JMSException e) {
+			logger.error("JMSException in AJmsQueue.init", e); 
+			throw new MeasurementCollectorException("JMSException in AJmsQueue.init", e);
+		}
+	}
+
+
+}

src/de/hottis/MeasurementCollector/AMessageParser.java

@@ -1,6 +1,7 @@
 package de.hottis.MeasurementCollector;
 
 import java.time.LocalDateTime;
+import java.util.List;
 import java.util.Properties;
 
 import org.apache.logging.log4j.LogManager;
@@ -10,18 +11,34 @@ public abstract class AMessageParser {
 	final protected Logger logger = LogManager.getRootLogger();
 
 	private String topic;
-	protected DataObjectQueue queue;
+	//private DataObjectQueue queue;
+	private JmsQueueProducer<ADataObject> jmsQueue = new JmsQueueProducer<ADataObject>();
 	protected Properties config;
-	
+
 	public AMessageParser(String topic, Properties config, DataObjectQueue queue) {
 		this.topic = topic;
 		this.config = config;
-		this.queue = queue;
+		//this.queue = queue;
 	}
-	
+
+	public void init() throws MeasurementCollectorException {
+		jmsQueue.init();
+	}
+
+
 	public String getTopic() {
 		return this.topic;
 	}
-	
+
+	public void enqueue(List<ADataObject> itemList) throws MeasurementCollectorException {
+		for (ADataObject ado : itemList) {
+			jmsQueue.enqueue(ado);
+			logger.debug("message enqueued");
+		}
+
+		//queue.add(itemList);
+		//logger.debug("Queue size: " + queue.size());
+	}
+
 	abstract public void execute(LocalDateTime timestamp, String msgPayload);
 }

src/de/hottis/MeasurementCollector/ElectricEnergyDataObject.java

@@ -4,6 +4,7 @@ import java.time.LocalDateTime;
 import java.util.HashMap;
 
 public class ElectricEnergyDataObject extends ADataObject {
+	private static final long serialVersionUID = 1L;
 	static final String ENERGY_KEY = "energy";
 	static final String POWER_KEY = "power";
 	static final String TABLE_NAME = "ElectricEnergy";

src/de/hottis/MeasurementCollector/JmsQueueProducer.java

@@ -0,0 +1,44 @@
+package de.hottis.MeasurementCollector;
+
+import java.io.Serializable;
+
+import javax.jms.DeliveryMode;
+import javax.jms.JMSException;
+import javax.jms.MessageProducer;
+import javax.jms.ObjectMessage;
+
+public class JmsQueueProducer<T extends Serializable> extends AJmsQueue {
+	private MessageProducer producer;
+
+	public JmsQueueProducer() {
+		super();
+	}
+
+	public void init() throws MeasurementCollectorException {
+		super.init();
+
+		try {
+			producer = session.createProducer(destination);
+			producer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
+			logger.debug("producer: " + producer);
+		} catch (JMSException e) {
+			logger.error("JMSException in AJmsQueue.init", e); 
+			throw new MeasurementCollectorException("JMSException in JmsQueueProducer.init", e);
+		}
+	}
+
+	public void enqueue(T item) throws MeasurementCollectorException {
+		try {
+			ObjectMessage message = session.createObjectMessage();
+			message.setObject(item);
+			producer.send(message);
+			logger.debug("message enqueued");
+		} catch (JMSException e) {
+			logger.error("JMSException in JmsQueueProducer.enqueue", e);
+			logger.error("Calling init");
+			init();
+			throw new MeasurementCollectorException("JMSException in JmsQueueProducer.enqueue", e);
+		}
+	}
+
+}

src/de/hottis/MeasurementCollector/MBusParser.java

@@ -85,13 +85,12 @@ public class MBusParser extends AMessageParser {
 				//	logger.debug(ado);
 				//}
 
-				queue.add(measurementItems);
-				//logger.debug("Queue size: " + queue.size());
+				enqueue(measurementItems);
 			} else {
 				logger.warn("unknown name: " + name);
 			}
 		} catch (Exception e) {
-			logger.error("Exception when handling mbus message: " + e);
+			logger.error("Exception when handling mbus message: ", e);
 		}
 
 	}

src/de/hottis/MeasurementCollector/MeasurementCollector.java

@@ -26,6 +26,7 @@ public class MeasurementCollector {
 		logger.debug("Queue instantiated");
 		
 		MBusParser mbusParser = new MBusParser(config, queue);
+		mbusParser.init();
 		mbusParser.registerConfiguredDataParsers();
 		mqttReceiver.registerParser(mbusParser);
 		logger.debug("MBusParser started");

src/de/hottis/MeasurementCollector/TemperatureDataObject.java

@@ -4,6 +4,7 @@ import java.time.LocalDateTime;
 import java.util.HashMap;
 
 public class TemperatureDataObject extends ADataObject {
+	private static final long serialVersionUID = 1L;
 	static final String TEMPERATURE_KEY = "temperature";
 	static final String TABLE_NAME = "Temperature";