execution/uc1-application/aggregation-deployment.yaml

@@ -15,13 +15,15 @@ spec:
       terminationGracePeriodSeconds: 0
       containers:
       - name: uc1-application
-        image: "soerenhenning/uc1-app:latest"
+        image: "theodolite/theodolite-uc1-kstreams-app:latest"
         ports:
         - containerPort: 5555
           name: jmx
         env:
         - name: KAFKA_BOOTSTRAP_SERVERS
           value: "my-confluent-cp-kafka:9092"
+        - name: SCHEMA_REGISTRY_URL
+          value: "http://my-confluent-cp-schema-registry:8081"
         - name: COMMIT_INTERVAL_MS
           value: "{{KAFKA_STREAMS_COMMIT_INTERVAL_MS}}"
         - name: JAVA_OPTS
@@ -50,4 +52,4 @@ spec:
       volumes:
         - name: jmx-config
           configMap:
-            name: aggregation-jmx-configmap
+            name: aggregation-jmx-configmap
\ No newline at end of file

execution/uc1-workload-generator/deployment.yaml

 apiVersion: apps/v1
-kind: StatefulSet
+kind: Deployment
 metadata:
   name: titan-ccp-load-generator
 spec:
   selector:
     matchLabels:
       app: titan-ccp-load-generator
-  serviceName: titan-ccp-load-generator
   replicas: {{INSTANCES}}
   template:
     metadata:
@@ -16,10 +15,16 @@ spec:
       terminationGracePeriodSeconds: 0
       containers:
       - name: workload-generator
-        image: soerenhenning/uc1-wg:latest 
+        image: theodolite/theodolite-uc1-workload-generator:latest
         env:
+        - name: ZK_HOST
+          value: "my-confluent-cp-zookeeper"
+        - name: ZK_PORT
+          value: "2181"
         - name: KAFKA_BOOTSTRAP_SERVERS
           value: "my-confluent-cp-kafka:9092"
+        - name: SCHEMA_REGISTRY_URL
+          value: "http://my-confluent-cp-schema-registry:8081"
         - name: NUM_SENSORS
           value: "{{NUM_SENSORS}}"
         - name: POD_NAME
@@ -28,4 +33,3 @@ spec:
               fieldPath: metadata.name
         - name: INSTANCES
           value: "{{INSTANCES}}"
-          
\ No newline at end of file

execution/uc2-application/aggregation-deployment.yaml

@@ -15,17 +15,21 @@ spec:
       terminationGracePeriodSeconds: 0
       containers:
       - name: uc2-application
-        image: "benediktwetzel/uc2-app:latest"
+        image: "theodolite/theodolite-uc2-kstreams-app:latest"
         ports:
         - containerPort: 5555
           name: jmx
         env:
         - name: KAFKA_BOOTSTRAP_SERVERS
           value: "my-confluent-cp-kafka:9092"
+        - name: SCHEMA_REGISTRY_URL
+          value: "http://my-confluent-cp-schema-registry:8081"
         - name: COMMIT_INTERVAL_MS
           value: "{{KAFKA_STREAMS_COMMIT_INTERVAL_MS}}"
         - name: JAVA_OPTS
           value: "-Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.port=5555"
+        - name: LOG_LEVEL
+          value: "INFO"
         resources:
           limits:
             memory: "{{MEMORY_LIMIT}}"
@@ -50,4 +54,4 @@ spec:
       volumes:
         - name: jmx-config
           configMap:
-            name: aggregation-jmx-configmap
+            name: aggregation-jmx-configmap
\ No newline at end of file

execution/uc2-workload-generator/deployment.yaml

@@ -6,7 +6,7 @@ spec:
   selector:
     matchLabels:
       app: titan-ccp-load-generator
-  replicas: 1
+  replicas: {{INSTANCES}}
   template:
     metadata:
       labels:
@@ -15,14 +15,23 @@ spec:
       terminationGracePeriodSeconds: 0
       containers:
       - name: workload-generator
-        image: benediktwetzel/uc2-wg:latest 
+        image: theodolite/theodolite-uc2-workload-generator:latest
         env:
+        - name: ZK_HOST
+          value: "my-confluent-cp-zookeeper"
+        - name: ZK_PORT
+          value: "2181"
         - name: KAFKA_BOOTSTRAP_SERVERS
           value: "my-confluent-cp-kafka:9092"
-        - name: HIERARCHY
-          value: "full"
+        - name: SCHEMA_REGISTRY_URL
+          value: "http://my-confluent-cp-schema-registry:8081"
         - name: NUM_SENSORS
           value: "4"
         - name: NUM_NESTED_GROUPS
           value: "{{NUM_NESTED_GROUPS}}"
-          
+        - name: POD_NAME
\ No newline at end of file
+          valueFrom:
+            fieldRef:
+              fieldPath: metadata.name
+        - name: INSTANCES
+          value: "{{INSTANCES}}"

execution/uc3-application/aggregation-deployment.yaml

@@ -15,13 +15,15 @@ spec:
       terminationGracePeriodSeconds: 0
       containers:
       - name: uc3-application
-        image: "soerenhenning/uc3-app:latest"
+        image: "theodolite/theodolite-uc3-kstreams-app:latest"
         ports:
         - containerPort: 5555
           name: jmx
         env:
         - name: KAFKA_BOOTSTRAP_SERVERS
           value: "my-confluent-cp-kafka:9092"
+        - name: SCHEMA_REGISTRY_URL
+          value: "http://my-confluent-cp-schema-registry:8081"
         - name: KAFKA_WINDOW_DURATION_MINUTES
           value: "1"
         - name: COMMIT_INTERVAL_MS
@@ -52,4 +54,4 @@ spec:
       volumes:
         - name: jmx-config
           configMap:
-            name: aggregation-jmx-configmap
+            name: aggregation-jmx-configmap
\ No newline at end of file

execution/uc3-workload-generator/deployment.yaml

 apiVersion: apps/v1
-kind: StatefulSet
+kind: Deployment
 metadata:
   name: titan-ccp-load-generator
 spec:
   selector:
     matchLabels:
       app: titan-ccp-load-generator
-  serviceName: titan-ccp-load-generator
   replicas: {{INSTANCES}}
   template:
     metadata:
@@ -16,10 +15,16 @@ spec:
       terminationGracePeriodSeconds: 0
       containers:
       - name: workload-generator
-        image: soerenhenning/uc3-wg:latest 
+        image: theodolite/theodolite-uc3-workload-generator:latest
         env:
+        - name: ZK_HOST
+          value: "my-confluent-cp-zookeeper"
+        - name: ZK_PORT
+          value: "2181"
         - name: KAFKA_BOOTSTRAP_SERVERS
           value: "my-confluent-cp-kafka:9092"
+        - name: SCHEMA_REGISTRY_URL
+          value: "http://my-confluent-cp-schema-registry:8081"
         - name: NUM_SENSORS
           value: "{{NUM_SENSORS}}"
         - name: POD_NAME
@@ -28,4 +33,3 @@ spec:
               fieldPath: metadata.name
         - name: INSTANCES
           value: "{{INSTANCES}}"
-          
\ No newline at end of file

execution/uc4-application/aggregation-deployment.yaml

@@ -15,13 +15,15 @@ spec:
       terminationGracePeriodSeconds: 0
       containers:
       - name: uc4-application
-        image: "soerenhenning/uc4-app:latest"
+        image: "theodolite/theodolite-uc4-kstreams-app:latest"
         ports:
         - containerPort: 5555
           name: jmx
         env:
         - name: KAFKA_BOOTSTRAP_SERVERS
           value: "my-confluent-cp-kafka:9092"
+        - name: SCHEMA_REGISTRY_URL
+          value: "http://my-confluent-cp-schema-registry:8081"
         - name: AGGREGATION_DURATION_DAYS
           value: "3" #AGGREGATION_DURATION_DAYS
         - name: AGGREGATION_DURATION_ADVANCE
@@ -54,4 +56,4 @@ spec:
       volumes:
         - name: jmx-config
           configMap:
-            name: aggregation-jmx-configmap
+            name: aggregation-jmx-configmap
\ No newline at end of file

execution/uc4-workload-generator/deployment.yaml

@@ -6,7 +6,7 @@ spec:
   selector:
     matchLabels:
       app: titan-ccp-load-generator
-  replicas: 1
+  replicas: {{INSTANCES}}
   template:
     metadata:
       labels:
@@ -15,10 +15,21 @@ spec:
       terminationGracePeriodSeconds: 0
       containers:
       - name: workload-generator
-        image: soerenhenning/uc4-wg:latest 
+        image: theodolite/theodolite-uc4-workload-generator:latest
         env:
+        - name: ZK_HOST
+          value: "my-confluent-cp-zookeeper"
+        - name: ZK_PORT
+          value: "2181"
         - name: KAFKA_BOOTSTRAP_SERVERS
           value: "my-confluent-cp-kafka:9092"
+        - name: SCHEMA_REGISTRY_URL
+          value: "http://my-confluent-cp-schema-registry:8081"
         - name: NUM_SENSORS
           value: "{{NUM_SENSORS}}"
-          
+        - name: POD_NAME
\ No newline at end of file
+          valueFrom:
+            fieldRef:
+              fieldPath: metadata.name
+        - name: INSTANCES
+          value: "{{INSTANCES}}"

settings.gradle

 rootProject.name = 'scalability-benchmarking'
 
+include 'workload-generator-commons'
 include 'application-kafkastreams-commons'
 
 include 'uc1-workload-generator'

uc1-application/src/main/java/theodolite/uc1/application/ConfigurationKeys.java

-package theodolite.uc1.application;
-
-/**
- * Keys to access configuration parameters.
- */
-public final class ConfigurationKeys {
-
-  public static final String APPLICATION_NAME = "application.name";
-
-  public static final String APPLICATION_VERSION = "application.version";
-
-  public static final String NUM_THREADS = "num.threads";
-
-  public static final String COMMIT_INTERVAL_MS = "commit.interval.ms";
-
-  public static final String CACHE_MAX_BYTES_BUFFERING = "cache.max.bytes.buffering";
-
-  public static final String KAFKA_BOOTSTRAP_SERVERS = "kafka.bootstrap.servers";
-
-  public static final String KAFKA_INPUT_TOPIC = "kafka.input.topic";
-
-
-  private ConfigurationKeys() {}
-
-}

uc1-application/src/main/java/theodolite/uc1/application/HistoryService.java

@@ -3,8 +3,9 @@ package theodolite.uc1.application;
 import java.util.concurrent.CompletableFuture;
 import org.apache.commons.configuration2.Configuration;
 import org.apache.kafka.streams.KafkaStreams;
+import theodolite.commons.kafkastreams.ConfigurationKeys;
 import theodolite.uc1.streamprocessing.Uc1KafkaStreamsBuilder;
-import titan.ccp.common.configuration.Configurations;
+import titan.ccp.common.configuration.ServiceConfigurations;
 
 /**
  * A microservice that manages the history and, therefore, stores and aggregates incoming
@@ -13,7 +14,7 @@ import titan.ccp.common.configuration.Configurations;
  */
 public class HistoryService {
 
-  private final Configuration config = Configurations.create();
+  private final Configuration config = ServiceConfigurations.createWithDefaults();
 
   private final CompletableFuture<Void> stopEvent = new CompletableFuture<>();
 
@@ -40,6 +41,7 @@ public class HistoryService {
         .commitIntervalMs(this.config.getInt(ConfigurationKeys.COMMIT_INTERVAL_MS))
         .cacheMaxBytesBuffering(this.config.getInt(ConfigurationKeys.CACHE_MAX_BYTES_BUFFERING))
         .bootstrapServers(this.config.getString(ConfigurationKeys.KAFKA_BOOTSTRAP_SERVERS))
+        .schemaRegistry(this.config.getString(ConfigurationKeys.SCHEMA_REGISTRY_URL))
         .build();
 
     this.stopEvent.thenRun(kafkaStreams::close);

uc1-application/src/main/java/theodolite/uc1/streamprocessing/TopologyBuilder.java

@@ -7,8 +7,8 @@ import org.apache.kafka.streams.Topology;
 import org.apache.kafka.streams.kstream.Consumed;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-import titan.ccp.common.kieker.kafka.IMonitoringRecordSerde;
-import titan.ccp.models.records.ActivePowerRecordFactory;
+import titan.ccp.common.kafka.avro.SchemaRegistryAvroSerdeFactory;
+import titan.ccp.model.records.ActivePowerRecord;
 
 /**
  * Builds Kafka Stream Topology for the History microservice.
@@ -18,14 +18,19 @@ public class TopologyBuilder {
   private static final Logger LOGGER = LoggerFactory.getLogger(TopologyBuilder.class);
 
   private final String inputTopic;
+  private final SchemaRegistryAvroSerdeFactory srAvroSerdeFactory;
+
   private final Gson gson = new Gson();
   private final StreamsBuilder builder = new StreamsBuilder();
 
+
   /**
    * Create a new {@link TopologyBuilder} using the given topics.
    */
-  public TopologyBuilder(final String inputTopic) {
+  public TopologyBuilder(final String inputTopic,
+      final SchemaRegistryAvroSerdeFactory srAvroSerdeFactory) {
     this.inputTopic = inputTopic;
+    this.srAvroSerdeFactory = srAvroSerdeFactory;
   }
 
   /**
@@ -35,7 +40,7 @@ public class TopologyBuilder {
     this.builder
         .stream(this.inputTopic, Consumed.with(
             Serdes.String(),
-            IMonitoringRecordSerde.serde(new ActivePowerRecordFactory())))
+            this.srAvroSerdeFactory.<ActivePowerRecord>forValues()))
         .mapValues(v -> this.gson.toJson(v))
         .foreach((k, v) -> LOGGER.info("Key: " + k + " Value: " + v));
 

uc1-application/src/main/java/theodolite/uc1/streamprocessing/Uc1KafkaStreamsBuilder.java

@@ -3,6 +3,7 @@ package theodolite.uc1.streamprocessing;
 import java.util.Objects;
 import org.apache.kafka.streams.Topology;
 import theodolite.commons.kafkastreams.KafkaStreamsBuilder;
+import titan.ccp.common.kafka.avro.SchemaRegistryAvroSerdeFactory;
 
 /**
  * Builder for the Kafka Streams configuration.
@@ -18,6 +19,7 @@ public class Uc1KafkaStreamsBuilder extends KafkaStreamsBuilder {
   @Override
   protected Topology buildTopology() {
     Objects.requireNonNull(this.inputTopic, "Input topic has not been set.");
-    return new TopologyBuilder(this.inputTopic).build();
+    return new TopologyBuilder(this.inputTopic,
+        new SchemaRegistryAvroSerdeFactory(this.schemaRegistryUrl)).build();
   }
 }

uc1-application/src/main/resources/META-INF/application.properties

@@ -5,6 +5,8 @@ kafka.bootstrap.servers=localhost:9092
 kafka.input.topic=input
 kafka.output.topic=output
 
+schema.registry.url=http://localhost:8091
+
 num.threads=1
 commit.interval.ms=100
 cache.max.bytes.buffering=-1

uc1-workload-generator/src/main/java/theodolite/uc1/workloadgenerator/LoadGenerator.java

 package theodolite.uc1.workloadgenerator;
 
 import java.io.IOException;
-import java.util.List;
+import java.time.Duration;
+import java.time.temporal.ChronoUnit;
 import java.util.Objects;
 import java.util.Properties;
-import java.util.Random;
-import java.util.concurrent.Executors;
-import java.util.concurrent.ScheduledExecutorService;
-import java.util.concurrent.TimeUnit;
-import java.util.regex.Pattern;
-import java.util.stream.Collectors;
-import java.util.stream.IntStream;
 import org.apache.kafka.clients.producer.ProducerConfig;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-import theodolite.kafkasender.KafkaRecordSender;
-import titan.ccp.models.records.ActivePowerRecord;
+import theodolite.commons.workloadgeneration.communication.kafka.KafkaRecordSender;
+import theodolite.commons.workloadgeneration.dimensions.KeySpace;
+import theodolite.commons.workloadgeneration.generators.KafkaWorkloadGenerator;
+import theodolite.commons.workloadgeneration.generators.KafkaWorkloadGeneratorBuilder;
+import theodolite.commons.workloadgeneration.misc.ZooKeeper;
+import titan.ccp.model.records.ActivePowerRecord;
 
-public class LoadGenerator {
+/**
+ * Load Generator for UC1.
+ */
+public final class LoadGenerator {
 
   private static final Logger LOGGER = LoggerFactory.getLogger(LoadGenerator.class);
 
-  private static final int WL_MAX_RECORDS = 150_000;
+  private static final long MAX_DURATION_IN_DAYS = 30L;
 
+  private LoadGenerator() {}
+
+  /**
+   * Entry point.
+   */
   public static void main(final String[] args) throws InterruptedException, IOException {
+    // uc1
     LOGGER.info("Start workload generator for use case UC1.");
 
+    // get environment variables
+    final String zooKeeperHost = Objects.requireNonNullElse(System.getenv("ZK_HOST"), "localhost");
+    final int zooKeeperPort =
+        Integer.parseInt(Objects.requireNonNullElse(System.getenv("ZK_PORT"), "2181"));
     final int numSensors =
         Integer.parseInt(Objects.requireNonNullElse(System.getenv("NUM_SENSORS"), "10"));
-    final int instanceId = getInstanceId();
     final int periodMs =
         Integer.parseInt(Objects.requireNonNullElse(System.getenv("PERIOD_MS"), "1000"));
-    final int value = Integer.parseInt(Objects.requireNonNullElse(System.getenv("VALUE"), "10"));
-    final int threads = Integer.parseInt(Objects.requireNonNullElse(System.getenv("THREADS"), "4"));
+    final double value =
+        Double.parseDouble(Objects.requireNonNullElse(System.getenv("VALUE"), "10"));
+    final int threads = Integer.parseInt(Objects.requireNonNullElse(System.getenv("THREADS"),
+        "4"));
     final String kafkaBootstrapServers =
         Objects.requireNonNullElse(System.getenv("KAFKA_BOOTSTRAP_SERVERS"), "localhost:9092");
+    final String schemaRegistryUrl =
+        Objects.requireNonNullElse(System.getenv("SCHEMA_REGISTRY_URL"), "http://localhost:8091");
     final String kafkaInputTopic =
         Objects.requireNonNullElse(System.getenv("KAFKA_INPUT_TOPIC"), "input");
     final String kafkaBatchSize = System.getenv("KAFKA_BATCH_SIZE");
     final String kafkaLingerMs = System.getenv("KAFKA_LINGER_MS");
     final String kafkaBufferMemory = System.getenv("KAFKA_BUFFER_MEMORY");
+    final int instances =
+        Integer.parseInt(Objects.requireNonNullElse(System.getenv("INSTANCES"), "1"));
 
-    final int idStart = instanceId * WL_MAX_RECORDS;
-    final int idEnd = Math.min((instanceId + 1) * WL_MAX_RECORDS, numSensors);
-    LOGGER.info("Generating data for sensors with IDs from {} to {} (exclusive).", idStart, idEnd);
-    final List<String> sensors = IntStream.range(idStart, idEnd)
-        .mapToObj(i -> "s_" + i)
-        .collect(Collectors.toList());
-
+    // create kafka record sender
     final Properties kafkaProperties = new Properties();
     // kafkaProperties.put("acks", this.acknowledges);
     kafkaProperties.compute(ProducerConfig.BATCH_SIZE_CONFIG, (k, v) -> kafkaBatchSize);
     kafkaProperties.compute(ProducerConfig.LINGER_MS_CONFIG, (k, v) -> kafkaLingerMs);
     kafkaProperties.compute(ProducerConfig.BUFFER_MEMORY_CONFIG, (k, v) -> kafkaBufferMemory);
-    final KafkaRecordSender<ActivePowerRecord> kafkaRecordSender = new KafkaRecordSender<>(
-        kafkaBootstrapServers,
-        kafkaInputTopic,
-        r -> r.getIdentifier(),
-        r -> r.getTimestamp(),
-        kafkaProperties);
-
-    final ScheduledExecutorService executor = Executors.newScheduledThreadPool(threads);
-    final Random random = new Random();
 
-    for (final String sensor : sensors) {
-      final int initialDelay = random.nextInt(periodMs);
-      executor.scheduleAtFixedRate(() -> {
-        kafkaRecordSender.write(new ActivePowerRecord(sensor, System.currentTimeMillis(), value));
-      }, initialDelay, periodMs, TimeUnit.MILLISECONDS);
-    }
+    final KafkaRecordSender<ActivePowerRecord> kafkaRecordSender =
+        new KafkaRecordSender.Builder<ActivePowerRecord>(
+            kafkaBootstrapServers,
+            kafkaInputTopic,
+            schemaRegistryUrl)
+                .keyAccessor(r -> r.getIdentifier())
+                .timestampAccessor(r -> r.getTimestamp())
+                .defaultProperties(kafkaProperties)
+                .build();
 
-    System.out.println("Wait for termination...");
-    executor.awaitTermination(30, TimeUnit.DAYS);
-    System.out.println("Will terminate now");
+    // create workload generator
+    final KafkaWorkloadGenerator<ActivePowerRecord> workloadGenerator =
+        KafkaWorkloadGeneratorBuilder.<ActivePowerRecord>builder()
+            .instances(instances)
+            .keySpace(new KeySpace("s_", numSensors))
+            .threads(threads)
+            .period(Duration.of(periodMs, ChronoUnit.MILLIS))
+            .duration(Duration.of(MAX_DURATION_IN_DAYS, ChronoUnit.DAYS))
+            .generatorFunction(
+                sensor -> new ActivePowerRecord(sensor, System.currentTimeMillis(), value))
+            .zooKeeper(new ZooKeeper(zooKeeperHost, zooKeeperPort))
+            .kafkaRecordSender(kafkaRecordSender)
+            .build();
 
+    // start
+    workloadGenerator.start();
   }
-
-  private static int getInstanceId() {
-    final String podName = System.getenv("POD_NAME");
-    if (podName == null) {
-      return 0;
-    } else {
-      return Pattern.compile("-")
-          .splitAsStream(podName)
-          .reduce((p, x) -> x)
-          .map(Integer::parseInt)
-          .orElse(0);
-    }
-  }
-
 }

uc2-application/src/main/java/theodolite/uc2/application/AggregationService.java

@@ -4,8 +4,9 @@ import java.time.Duration;
 import java.util.concurrent.CompletableFuture;
 import org.apache.commons.configuration2.Configuration;
 import org.apache.kafka.streams.KafkaStreams;
+import theodolite.commons.kafkastreams.ConfigurationKeys;
 import theodolite.uc2.streamprocessing.Uc2KafkaStreamsBuilder;
-import titan.ccp.common.configuration.Configurations;
+import titan.ccp.common.configuration.ServiceConfigurations;
 
 /**
  * A microservice that manages the history and, therefore, stores and aggregates incoming
@@ -14,7 +15,7 @@ import titan.ccp.common.configuration.Configurations;
  */
 public class AggregationService {
 
-  private final Configuration config = Configurations.create();
+  private final Configuration config = ServiceConfigurations.createWithDefaults();
 
   private final CompletableFuture<Void> stopEvent = new CompletableFuture<>();
 
@@ -39,16 +40,18 @@ public class AggregationService {
     final Uc2KafkaStreamsBuilder uc2KafkaStreamsBuilder = new Uc2KafkaStreamsBuilder();
     uc2KafkaStreamsBuilder
         .inputTopic(this.config.getString(ConfigurationKeys.KAFKA_INPUT_TOPIC))
+        .feedbackTopic(this.config.getString(ConfigurationKeys.KAFKA_FEEDBACK_TOPIC))
         .outputTopic(this.config.getString(ConfigurationKeys.KAFKA_OUTPUT_TOPIC))
-        .configurationTopic(this.config.getString(ConfigurationKeys.CONFIGURATION_KAFKA_TOPIC))
-        .windowSize(Duration.ofMillis(this.config.getLong(ConfigurationKeys.WINDOW_SIZE_MS)))
-        .gracePeriod(Duration.ofMillis(this.config.getLong(ConfigurationKeys.WINDOW_GRACE_MS)));
+        .configurationTopic(this.config.getString(ConfigurationKeys.KAFKA_CONFIGURATION_TOPIC))
+        .emitPeriod(Duration.ofMillis(this.config.getLong(ConfigurationKeys.EMIT_PERIOD_MS)))
+        .gracePeriod(Duration.ofMillis(this.config.getLong(ConfigurationKeys.GRACE_PERIOD_MS)));
 
     // Configuration of the stream application
     final KafkaStreams kafkaStreams = uc2KafkaStreamsBuilder
         .applicationName(this.config.getString(ConfigurationKeys.APPLICATION_NAME))
         .applicationVersion(this.config.getString(ConfigurationKeys.APPLICATION_VERSION))
         .bootstrapServers(this.config.getString(ConfigurationKeys.KAFKA_BOOTSTRAP_SERVERS))
+        .schemaRegistry(this.config.getString(ConfigurationKeys.SCHEMA_REGISTRY_URL))
         .numThreads(this.config.getInt(ConfigurationKeys.NUM_THREADS))
         .commitIntervalMs(this.config.getInt(ConfigurationKeys.COMMIT_INTERVAL_MS))
         .cacheMaxBytesBuffering(this.config.getInt(ConfigurationKeys.CACHE_MAX_BYTES_BUFFERING))

uc2-application/src/main/java/theodolite/uc2/application/ConfigurationKeys.java

-package theodolite.uc2.application;
-
-/**
- * Keys to access configuration parameters.
- */
-public final class ConfigurationKeys {
-  public static final String APPLICATION_NAME = "application.name";
-
-  public static final String APPLICATION_VERSION = "application.version";
-
-  public static final String CONFIGURATION_KAFKA_TOPIC = "configuration.kafka.topic";
-
-  public static final String KAFKA_BOOTSTRAP_SERVERS = "kafka.bootstrap.servers";
-
-  public static final String KAFKA_OUTPUT_TOPIC = "kafka.output.topic";
-
-  public static final String KAFKA_INPUT_TOPIC = "kafka.input.topic";
-
-  public static final String WINDOW_SIZE_MS = "window.size.ms";
-
-  public static final String WINDOW_GRACE_MS = "window.grace.ms";
-
-  public static final String NUM_THREADS = "num.threads";
-
-  public static final String COMMIT_INTERVAL_MS = "commit.interval.ms";
-
-  public static final String CACHE_MAX_BYTES_BUFFERING = "cache.max.bytes.buffering";
-
-  private ConfigurationKeys() {}
-
-}

uc2-application/src/main/java/theodolite/uc2/streamprocessing/ChildParentsTransformerFactory.java → uc2-application/src/main/java/theodolite/uc2/streamprocessing/ChildParentsTransformerSupplier.java

@@ -5,6 +5,7 @@ import java.util.Optional;
 import java.util.Set;
 import org.apache.kafka.common.serialization.Serdes;
 import org.apache.kafka.streams.KeyValue;
+import org.apache.kafka.streams.kstream.Transformer;
 import org.apache.kafka.streams.kstream.TransformerSupplier;
 import org.apache.kafka.streams.state.KeyValueStore;
 import org.apache.kafka.streams.state.StoreBuilder;
@@ -13,40 +14,27 @@ import titan.ccp.configuration.events.Event;
 import titan.ccp.model.sensorregistry.SensorRegistry;
 
 /**
- * Factory class configuration required by {@link ChildParentsTransformer}.
+ * Supplier class for a {@link ChildParentsTransformer}.
  */
-public class ChildParentsTransformerFactory {
+public class ChildParentsTransformerSupplier implements
+    TransformerSupplier<Event, SensorRegistry, Iterable<KeyValue<String, Optional<Set<String>>>>> {
 
   private static final String STORE_NAME = "CHILD-PARENTS-TRANSFORM-STATE";
 
-  /**
-   * Returns a {@link TransformerSupplier} for {@link ChildParentsTransformer}.
-   */
-  public TransformerSupplier<Event, SensorRegistry, Iterable<KeyValue<String, Optional<Set<String>>>>> getTransformerSupplier() { // NOCS
-    return new TransformerSupplier<>() {
-      @Override
-      public ChildParentsTransformer get() {
-        return new ChildParentsTransformer(STORE_NAME);
-      }
-    };
+  @Override
+  public Transformer<Event, SensorRegistry, Iterable<KeyValue<String, Optional<Set<String>>>>> get() { // NOCS
+    return new ChildParentsTransformer(STORE_NAME);
   }
 
-  /**
-   * Returns a {@link StoreBuilder} for {@link ChildParentsTransformer}.
-   */
-  public StoreBuilder<KeyValueStore<String, Set<String>>> getStoreBuilder() {
-    return Stores.keyValueStoreBuilder(
+  @Override
+  public Set<StoreBuilder<?>> stores() {
+    final StoreBuilder<KeyValueStore<String, Set<String>>> store = Stores.keyValueStoreBuilder(
         Stores.persistentKeyValueStore(STORE_NAME),
         Serdes.String(),
         ParentsSerde.serde())
         .withLoggingEnabled(Map.of());
-  }
 
-  /**
-   * Returns the store name for {@link ChildParentsTransformer}.
-   */
-  public String getStoreName() {
-    return STORE_NAME;
+    return Set.of(store);
   }
 
 }

uc2-application/src/main/java/theodolite/uc2/streamprocessing/JointFlatTransformer.java

@@ -9,7 +9,7 @@ import org.apache.kafka.streams.KeyValue;
 import org.apache.kafka.streams.kstream.Transformer;
 import org.apache.kafka.streams.processor.ProcessorContext;
 import org.apache.kafka.streams.state.KeyValueStore;
-import titan.ccp.models.records.ActivePowerRecord;
+import titan.ccp.model.records.ActivePowerRecord;
 
 /**
  * Transforms the join result of an {@link ActivePowerRecord} and the corresponding sensor parents

uc2-application/src/main/java/theodolite/uc2/streamprocessing/JointFlatTransformerFactory.java → uc2-application/src/main/java/theodolite/uc2/streamprocessing/JointFlatTransformerSupplier.java

@@ -4,47 +4,35 @@ import java.util.Map;
 import java.util.Set;
 import org.apache.kafka.common.serialization.Serdes;
 import org.apache.kafka.streams.KeyValue;
+import org.apache.kafka.streams.kstream.Transformer;
 import org.apache.kafka.streams.kstream.TransformerSupplier;
 import org.apache.kafka.streams.state.KeyValueStore;
 import org.apache.kafka.streams.state.StoreBuilder;
 import org.apache.kafka.streams.state.Stores;
-import titan.ccp.models.records.ActivePowerRecord;
+import titan.ccp.model.records.ActivePowerRecord;
 
 /**
- * Factory class configuration required by {@link JointFlatTransformerFactory}.
+ * Supplier class for {@link JointFlatTransformerSupplier}.
  */
-public class JointFlatTransformerFactory {
+public class JointFlatTransformerSupplier implements
+    TransformerSupplier<String, JointRecordParents, Iterable<KeyValue<SensorParentKey, ActivePowerRecord>>> { // NOCS
 
   private static final String STORE_NAME = "JOINT-FLAT-MAP-TRANSFORM-STATE";
 
-  /**
-   * Returns a {@link TransformerSupplier} for {@link JointFlatTransformer}.
-   */
-  public TransformerSupplier<String, JointRecordParents, Iterable<KeyValue<SensorParentKey, ActivePowerRecord>>> getTransformerSupplier() { // NOCS
-    return new TransformerSupplier<>() {
-      @Override
-      public JointFlatTransformer get() {
-        return new JointFlatTransformer(STORE_NAME);
-      }
-    };
+  @Override
+  public Transformer<String, JointRecordParents, Iterable<KeyValue<SensorParentKey, ActivePowerRecord>>> get() { // NOCS
+    return new JointFlatTransformer(STORE_NAME);
   }
 
-  /**
-   * Returns a {@link StoreBuilder} for {@link JointFlatTransformer}.
-   */
-  public StoreBuilder<KeyValueStore<String, Set<String>>> getStoreBuilder() {
-    return Stores.keyValueStoreBuilder(
+  @Override
+  public Set<StoreBuilder<?>> stores() {
+    final StoreBuilder<KeyValueStore<String, Set<String>>> store = Stores.keyValueStoreBuilder(
         Stores.persistentKeyValueStore(STORE_NAME),
         Serdes.String(),
         ParentsSerde.serde())
         .withLoggingEnabled(Map.of());
-  }
 
-  /**
-   * Returns the store name for {@link JointFlatTransformer}.
-   */
-  public String getStoreName() {
-    return STORE_NAME;
+    return Set.of(store);
   }
 
 }