Unify logging among all streaming engines

Fix #406 (closed), depends on !307 (merged).

theodolite-benchmarks/uc2-kstreams/src/main/java/rocks/theodolite/benchmarks/uc2/kstreams/TopologyBuilder.java

@@ -11,8 +11,6 @@ import org.apache.kafka.streams.kstream.Consumed;
 import org.apache.kafka.streams.kstream.Materialized;
 import org.apache.kafka.streams.kstream.Produced;
 import org.apache.kafka.streams.kstream.TimeWindows;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 import rocks.theodolite.benchmarks.commons.kafka.avro.SchemaRegistryAvroSerdeFactory;
 import rocks.theodolite.benchmarks.commons.kstreams.GenericSerde;
 import rocks.theodolite.benchmarks.commons.model.records.ActivePowerRecord;
@@ -23,8 +21,6 @@ import rocks.theodolite.benchmarks.uc2.kstreams.util.StatsFactory;
  */
 public class TopologyBuilder {
 
-  private static final Logger LOGGER = LoggerFactory.getLogger(TopologyBuilder.class);
-
   private final String inputTopic;
   private final String outputTopic;
   private final SchemaRegistryAvroSerdeFactory srAvroSerdeFactory;
@@ -54,10 +50,6 @@ public class TopologyBuilder {
                 this.srAvroSerdeFactory.<ActivePowerRecord>forValues()))
         .groupByKey()
         .windowedBy(TimeWindows.ofSizeWithNoGrace(this.duration))
-        // .aggregate(
-        // () -> 0.0,
-        // (key, activePowerRecord, agg) -> agg + activePowerRecord.getValueInW(),
-        // Materialized.with(Serdes.String(), Serdes.Double()))
         .aggregate(
             () -> Stats.of(),
             (k, record, stats) -> StatsFactory.accumulate(stats, record.getValueInW()),
@@ -66,7 +58,7 @@ public class TopologyBuilder {
                 GenericSerde.from(Stats::toByteArray, Stats::fromByteArray)))
         .toStream()
         .map((k, s) -> KeyValue.pair(k.key(), s.toString()))
-        .peek((k, v) -> LOGGER.info(k + ": " + v))
+        // .peek((k, v) -> LOGGER.info(k + ": " + v))
         .to(this.outputTopic, Produced.with(Serdes.String(), Serdes.String()));
 
     return this.builder.build(properties);