Simplify type hinting

theodolite-benchmarks/uc2-application-flink/src/main/java/theodolite/uc2/application/HistoryServiceFlinkJob.java

@@ -5,8 +5,6 @@ import java.util.Properties;
 import org.apache.commons.configuration2.Configuration;
 import org.apache.flink.api.common.eventtime.WatermarkStrategy;
 import org.apache.flink.api.common.serialization.DeserializationSchema;
-import org.apache.flink.api.common.typeinfo.TypeHint;
-import org.apache.flink.api.common.typeinfo.TypeInformation;
 import org.apache.flink.api.common.typeinfo.Types;
 import org.apache.flink.api.java.tuple.Tuple2;
 import org.apache.flink.formats.avro.registry.confluent.ConfluentRegistryAvroDeserializationSchema;
@@ -71,7 +69,7 @@ public class HistoryServiceFlinkJob {
         new FlinkKafkaKeyValueSerde<>(outputTopic,
             Serdes::String,
             Serdes::String,
-            TypeInformation.of(new TypeHint<Tuple2<String, String>>() {}));
+            Types.TUPLE(Types.STRING, Types.STRING));
     kafkaProps.setProperty("transaction.timeout.ms", "" + 5 * 60 * 1000); // TODO necessary?
     final FlinkKafkaProducer<Tuple2<String, String>> kafkaSink = new FlinkKafkaProducer<>(
         outputTopic, sinkSerde, kafkaProps, FlinkKafkaProducer.Semantic.AT_LEAST_ONCE);

theodolite-benchmarks/uc3-application-flink/src/main/java/theodolite/uc3/application/HistoryServiceFlinkJob.java

@@ -8,8 +8,6 @@ import java.util.Properties;
 import org.apache.commons.configuration2.Configuration;
 import org.apache.flink.api.common.eventtime.WatermarkStrategy;
 import org.apache.flink.api.common.serialization.DeserializationSchema;
-import org.apache.flink.api.common.typeinfo.TypeHint;
-import org.apache.flink.api.common.typeinfo.TypeInformation;
 import org.apache.flink.api.common.typeinfo.Types;
 import org.apache.flink.api.java.functions.KeySelector;
 import org.apache.flink.api.java.tuple.Tuple2;
@@ -87,7 +85,7 @@ public class HistoryServiceFlinkJob {
         new FlinkKafkaKeyValueSerde<>(outputTopic,
             Serdes::String,
             Serdes::String,
-            TypeInformation.of(new TypeHint<Tuple2<String, String>>() {}));
+            Types.TUPLE(Types.STRING, Types.STRING));
 
     final FlinkKafkaProducer<Tuple2<String, String>> kafkaSink = new FlinkKafkaProducer<>(
         outputTopic, sinkSerde, kafkaProps, FlinkKafkaProducer.Semantic.AT_LEAST_ONCE);

theodolite-benchmarks/uc4-application-flink/src/main/java/theodolite/uc4/application/AggregationServiceFlinkJob.java

@@ -123,7 +123,7 @@ public class AggregationServiceFlinkJob {
             outputTopic,
             Serdes::String,
             () -> new SchemaRegistryAvroSerdeFactory(schemaRegistryUrl).forValues(),
-            TypeInformation.of(new TypeHint<Tuple2<String, AggregatedActivePowerRecord>>() {}));
+            Types.TUPLE(Types.STRING, TypeInformation.of(AggregatedActivePowerRecord.class)));
 
     final FlinkKafkaProducer<Tuple2<String, AggregatedActivePowerRecord>> kafkaAggregationSink =
         new FlinkKafkaProducer<>(