- Properties props = new Properties();
- props.put(StreamsConfig.APPLICATION_ID_CONFIG, properties.getApplicationId());
- props.put(StreamsConfig.APPLICATION_SERVER_CONFIG, properties.getApplicationServer());
- props.put(StreamsConfig.BOOTSTRAP_SERVERS_CONFIG, properties.getBootstrapServer());
- props.put(StreamsConfig.DEFAULT_KEY_SERDE_CLASS_CONFIG, Serdes.String().getClass().getName());
- props.put(StreamsConfig.DEFAULT_VALUE_SERDE_CLASS_CONFIG, Serdes.String().getClass().getName());
- props.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");
+ KTable<String, String> users = builder.table(usersInputTopic);
+ KStream<String, String> rankings = builder.stream(rankingInputTopic);
+
+ rankings
+ .join(users, (rankingJson, userJson) ->
+ {
+ try
+ {
+ Ranking ranking = mapper.readValue(rankingJson, Ranking.class);
+ User user = mapper.readValue(userJson, User.class);
+
+ return mapper.writeValueAsString(
+ UserRanking.of(
+ user.getFirstName(),
+ user.getLastName(),
+ ranking.getEntries()));
+ }
+ catch (JsonProcessingException e)
+ {
+ throw new RuntimeException(e);
+ }
+ })
+ .toTable(Materialized.as(storeSupplier));
+
+ Topology topology = builder.build();
+ log.info("\n\n{}", topology.describe());
+
+ return topology;
+ }