package de.juplo.kafka;
+import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
-import org.apache.kafka.clients.consumer.ConsumerRecord;
+import java.time.Duration;
import java.util.HashMap;
import java.util.Map;
+import java.util.Optional;
+@RequiredArgsConstructor
@Slf4j
-public class ApplicationRecordHandler implements RecordHandler<String, String>
+public class ApplicationRecordHandler implements RecordHandler
{
+ private final AdderResults results;
+ private final Optional<Duration> throttle;
+ private final String id;
+
private final Map<Integer, AdderBusinessLogic> state = new HashMap<>();
@Override
- public void accept(ConsumerRecord<String, String> record)
+ public void addNumber(
+ String topic,
+ Integer partition,
+ Long offset,
+ String user,
+ MessageAddNumber message)
+ {
+ state.get(partition).addToSum(user, message.getNext());
+ throttle();
+ }
+
+ @Override
+ public void calculateSum(
+ String topic,
+ Integer partition,
+ Long offset,
+ String user,
+ MessageCalculateSum message)
{
- Integer partition = record.partition();
- String user = record.key();
- String message = record.value();
- switch (message)
+ AdderResult result = state.get(partition).calculate(user);
+ log.info("{} - New result for {}: {}", id, user, result);
+ results.addResults(partition, user, result);
+ throttle();
+ }
+
+ private void throttle()
+ {
+ if (throttle.isPresent())
{
- case "START":
- state.get(partition).startSum(user);
- break;
-
- case "END":
- Long result = state.get(partition).endSum(user);
- log.info("New result for {}: {}", user, result);
- break;
-
- default:
- state.get(partition).addToSum(user, Integer.parseInt(message));
- break;
+ try
+ {
+ Thread.sleep(throttle.get().toMillis());
+ }
+ catch (InterruptedException e)
+ {
+ log.warn("{} - Intrerrupted while throttling: {}", id, e);
+ }
}
}
- protected void addPartition(Integer partition, Map<String, Long> state)
+ protected void addPartition(Integer partition, Map<String, AdderResult> state)
{
this.state.put(partition, new AdderBusinessLogic(state));
}
- protected Map<String, Long> removePartition(Integer partition)
+ protected Map<String, AdderResult> removePartition(Integer partition)
{
return this.state.remove(partition).getState();
}
{
return state;
}
+
+ public AdderBusinessLogic getState(Integer partition)
+ {
+ return state.get(partition);
+ }
}