は、いくつかのサンプルコード(カフカクライアントのlibバージョン0.10.1.1)である:
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.apache.kafka.clients.consumer.MockConsumer;
import org.apache.kafka.clients.consumer.OffsetResetStrategy;
import org.apache.kafka.common.TopicPartition;
...
String topic = "MyTopic";
Collection<TopicPartition> partitions = new ArrayList<TopicPartition>();
Collection<String> topicsCollection = new ArrayList<String>();
partitions.add(new TopicPartition(topic, 1));
Map<TopicPartition, Long> partitionsBeginningMap = new HashMap<TopicPartition, Long>();
Map<TopicPartition, Long> partitionsEndMap = new HashMap<TopicPartition, Long>();
long records = 10;
for (TopicPartition partition : partitions) {
partitionsBeginningMap.put(partition, 0l);
partitionsEndMap.put(partition, records);
topicsCollection.add(partition.topic());
}
MockConsumer<String, MyObject> second = new MockConsumer<String, MyObject>(
OffsetResetStrategy.EARLIEST);
second.subscribe(topicsCollection);
second.rebalance(partitions);
second.updateBeginningOffsets(partitionsBeginningMap);
second.updateEndOffsets(partitionsEndMap);
for (long i = 0; i < 10; i++) {
MyObject value = Generator.generate();
ConsumerRecord<String, MyObject> record = new ConsumerRecord<String, MyObject>(
topic, 1, i, null,value);
second.addRecord(record);
}
...