counter: 1.2.15 - Added assertion for the expected state

[demos/kafka/wordcount] / src / main / java / de / juplo / kafka / wordcount / counter / CounterStreamProcessor.java

diff --git a/src/main/java/de/juplo/kafka/wordcount/counter/CounterStreamProcessor.java b/src/main/java/de/juplo/kafka/wordcount/counter/CounterStreamProcessor.java
index 3dd8c0f..712ab65 100644 (file)
--- a/src/main/java/de/juplo/kafka/wordcount/counter/CounterStreamProcessor.java
+++ b/src/main/java/de/juplo/kafka/wordcount/counter/CounterStreamProcessor.java
@@ -2,14 +2,13 @@ package de.juplo.kafka.wordcount.counter;
 
 import lombok.extern.slf4j.Slf4j;
 import org.apache.kafka.common.serialization.Serdes;
-import org.apache.kafka.streams.KafkaStreams;
-import org.apache.kafka.streams.KeyValue;
-import org.apache.kafka.streams.StreamsBuilder;
-import org.apache.kafka.streams.Topology;
+import org.apache.kafka.streams.*;
 import org.apache.kafka.streams.kstream.Consumed;
 import org.apache.kafka.streams.kstream.KStream;
 import org.apache.kafka.streams.kstream.Materialized;
 import org.apache.kafka.streams.state.KeyValueBytesStoreSupplier;
+import org.apache.kafka.streams.state.QueryableStoreTypes;
+import org.apache.kafka.streams.state.ReadOnlyKeyValueStore;
 
 import java.util.Properties;
 
@@ -17,6 +16,9 @@ import java.util.Properties;
 @Slf4j
 public class CounterStreamProcessor
 {
+       public static final String STORE_NAME = "counter";
+
+
        public final KafkaStreams streams;
 
 
@@ -50,7 +52,7 @@ public class CounterStreamProcessor
                                .groupByKey()
                                .count(Materialized.as(storeSupplier))
                                .toStream()
-                               .map((word, count) -> new KeyValue<>(word, WordCount.of(word, count)))
+                               .map((word, counter) -> new KeyValue<>(word, WordCounter.of(word, counter)))
                                .to(outputTopic);
 
                Topology topology = builder.build();
@@ -59,6 +61,11 @@ public class CounterStreamProcessor
                return topology;
        }
 
+       ReadOnlyKeyValueStore<Word, Long> getStore()
+       {
+               return streams.store(StoreQueryParameters.fromNameAndType(STORE_NAME, QueryableStoreTypes.keyValueStore()));
+       }
+
        public void start()
        {
                log.info("Starting Stream-Processor");