X-Git-Url: https://juplo.de/gitweb/?a=blobdiff_plain;f=src%2Fmain%2Fjava%2Fde%2Fjuplo%2Fkafka%2FEndlessProducer.java;fp=src%2Fmain%2Fjava%2Fde%2Fjuplo%2Fkafka%2FEndlessProducer.java;h=43b0e41e7625364083aa1ae6157adb34799dda74;hb=6db60eede6c6a14a20fb88cdcd0e0be0e959d31b;hp=0000000000000000000000000000000000000000;hpb=d4bf2b7400df95df6c3f2534519671e596163be2;p=demos%2Fkafka%2Ftraining diff --git a/src/main/java/de/juplo/kafka/EndlessProducer.java b/src/main/java/de/juplo/kafka/EndlessProducer.java new file mode 100644 index 0000000..43b0e41 --- /dev/null +++ b/src/main/java/de/juplo/kafka/EndlessProducer.java @@ -0,0 +1,171 @@ +package de.juplo.kafka; + +import lombok.extern.slf4j.Slf4j; +import org.apache.kafka.clients.producer.KafkaProducer; +import org.apache.kafka.clients.producer.ProducerRecord; +import org.apache.kafka.common.serialization.StringSerializer; + +import javax.annotation.PreDestroy; +import java.util.Properties; +import java.util.concurrent.ExecutionException; +import java.util.concurrent.ExecutorService; +import java.util.concurrent.Future; + + +@Slf4j +public class EndlessProducer implements Runnable +{ + private final ExecutorService executor; + private final String id; + private final String topic; + private final String acks; + private final int throttleMs; + private final KafkaProducer producer; + + private boolean running = false; + private long i = 0; + private long produced = 0; + private Future future = null; + + public EndlessProducer( + ExecutorService executor, + String bootstrapServer, + String clientId, + String topic, + String acks, + int throttleMs) + { + this.executor = executor; + this.id = clientId; + this.topic = topic; + this.acks = acks; + this.throttleMs = throttleMs; + + Properties props = new Properties(); + props.put("bootstrap.servers", bootstrapServer); + props.put("client.id", clientId); + props.put("acks", acks); + props.put("key.serializer", StringSerializer.class.getName()); + props.put("value.serializer", StringSerializer.class.getName()); + + this.producer = new KafkaProducer<>(props); + } + + @Override + public void run() + { + try + { + for (; running; i++) + { + final long time = System.currentTimeMillis(); + + final ProducerRecord record = new ProducerRecord<>( + topic, // Topic + Long.toString(i % 10), // Key + Long.toString(i) // Value + ); + + producer.send(record, (metadata, e) -> + { + long now = System.currentTimeMillis(); + if (e == null) + { + // HANDLE SUCCESS + produced++; + log.debug( + "{} - Sent key={} message={} partition={}/{} timestamp={} latency={}ms", + id, + record.key(), + record.value(), + metadata.partition(), + metadata.offset(), + metadata.timestamp(), + now - time + ); + } + else + { + // HANDLE ERROR + log.error( + "{} - ERROR key={} timestamp={} latency={}ms: {}", + id, + record.key(), + metadata == null ? -1 : metadata.timestamp(), + now - time, + e.toString() + ); + } + }); + + long now = System.currentTimeMillis(); + log.trace( + "{} - Queued #{} key={} latency={}ms", + id, + i, + record.key(), + now - time + ); + + if (throttleMs > 0) + { + try + { + Thread.sleep(throttleMs); + } + catch (InterruptedException e) + { + log.warn("{} - Interrupted while throttling!", e); + } + } + } + + log.info("{} - Done", id); + } + catch (Exception e) + { + + } + } + + public synchronized void start() + { + if (running) + throw new IllegalStateException("Producer instance " + id + " is already running!"); + + log.info("{} - Starting - produced {} messages before", id, produced); + running = true; + future = executor.submit(this); + } + + public synchronized void stop() throws ExecutionException, InterruptedException + { + if (!running) + throw new IllegalStateException("Producer instance " + id + " is not running!"); + + log.info("{} - Stopping...", id); + running = false; + future.get(); + log.info("{} - Stopped - produced {} messages so far", id, produced); + } + + @PreDestroy + public void destroy() throws ExecutionException, InterruptedException + { + log.info("{} - Destroy!", id); + try + { + stop(); + } + catch (IllegalStateException e) + { + log.info("{} - Was already stopped", id); + } + finally + { + log.info("{} - Closing the KafkaProducer", id); + producer.close(); + log.info("{}: Produced {} messages in total, exiting!", id, produced); + } + } +}