query: 1.0.5 - Updated Spring Boot to `3.2.5`

[demos/kafka/wordcount] / src / main / java / de / juplo / kafka / wordcount / query / QueryStreamProcessor.java

diff --git a/src/main/java/de/juplo/kafka/wordcount/query/QueryStreamProcessor.java b/src/main/java/de/juplo/kafka/wordcount/query/QueryStreamProcessor.java
index 319861d..fed75b3 100644 (file)
--- a/src/main/java/de/juplo/kafka/wordcount/query/QueryStreamProcessor.java
+++ b/src/main/java/de/juplo/kafka/wordcount/query/QueryStreamProcessor.java
@@ -2,20 +2,21 @@ package de.juplo.kafka.wordcount.query;
 
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
+import jakarta.annotation.PostConstruct;
+import jakarta.annotation.PreDestroy;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.kafka.clients.consumer.ConsumerConfig;
 import org.apache.kafka.common.serialization.Serdes;
 import org.apache.kafka.streams.*;
+import org.apache.kafka.streams.kstream.KStream;
+import org.apache.kafka.streams.kstream.KTable;
 import org.apache.kafka.streams.kstream.Materialized;
 import org.apache.kafka.streams.state.HostInfo;
 import org.apache.kafka.streams.state.QueryableStoreTypes;
 import org.apache.kafka.streams.state.ReadOnlyKeyValueStore;
 import org.springframework.boot.SpringApplication;
 import org.springframework.context.ConfigurableApplicationContext;
-import org.springframework.stereotype.Component;
 
-import javax.annotation.PostConstruct;
-import javax.annotation.PreDestroy;
 import java.net.URI;
 import java.util.Optional;
 import java.util.Properties;
@@ -25,7 +26,6 @@ import static org.apache.kafka.streams.errors.StreamsUncaughtExceptionHandler.St
 
 
 @Slf4j
-@Component
 public class QueryStreamProcessor
 {
        public final KafkaStreams streams;
@@ -36,18 +36,44 @@ public class QueryStreamProcessor
 
 
        public QueryStreamProcessor(
-                       QueryApplicationProperties properties,
+                       String applicationId,
+                       HostInfo applicationServer,
+                       String bootstrapServer,
+                       String usersInputTopic,
+                       String rankingInputTopic,
                        ObjectMapper mapper,
                        ConfigurableApplicationContext context)
        {
                StreamsBuilder builder = new StreamsBuilder();
 
-               builder.table(properties.getRankingInputTopic(), Materialized.as(storeName));
+               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(storeName));
 
                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.APPLICATION_ID_CONFIG, applicationId);
+               props.put(StreamsConfig.APPLICATION_SERVER_CONFIG, applicationServer.host() + ":" + applicationServer.port());
+               props.put(StreamsConfig.BOOTSTRAP_SERVERS_CONFIG, bootstrapServer);
                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");
@@ -64,7 +90,7 @@ public class QueryStreamProcessor
                        return SHUTDOWN_CLIENT;
                });
 
-               hostInfo = HostInfo.buildFromEndpoint(properties.getApplicationServer());
+               hostInfo = applicationServer;
                storeParameters = StoreQueryParameters.fromNameAndType(storeName, QueryableStoreTypes.keyValueStore());;
                this.mapper = mapper;
        }
@@ -75,7 +101,7 @@ public class QueryStreamProcessor
                HostInfo activeHost = metadata.activeHost();
                log.debug("Local store for {}: {}, {}:{}", username, metadata.partition(), activeHost.host(), activeHost.port());
 
-               if (activeHost.equals(this.hostInfo))
+               if (activeHost.equals(this.hostInfo) || activeHost.equals(HostInfo.unavailable()))
                {
                        return Optional.empty();
                }
@@ -85,7 +111,7 @@ public class QueryStreamProcessor
                return Optional.of(location);
        }
 
-       public Optional<Ranking> getRanking(String username)
+       public Optional<UserRanking> getUserRanking(String username)
        {
                return
                                Optional
@@ -94,7 +120,7 @@ public class QueryStreamProcessor
                                                {
                                                        try
                                                        {
-                                                               return mapper.readValue(json, Ranking.class);
+                                                               return mapper.readValue(json, UserRanking.class);
                                                        }
                                                        catch (JsonProcessingException e)
                                                        {