kafka_test.partitioner01

import java.util.List;
import java.util.Map;
import org.apache.kafka.clients.producer.Partitioner;
import org.apache.kafka.common.Cluster;
import org.apache.kafka.common.PartitionInfo;

public class TestPartitioner implements Partitioner{

	@Override
	public void configure(Map<String, ?> arg0) {
		// Do nothing
	}

	@Override
	public void close() {
		// Do nothing
	}

	@Override
	public int partition(String topic, Object key, byte[] keyBytes, Object value, byte[] valueBytes, Cluster cluster) {
        List<PartitionInfo> partitions = cluster.partitionsForTopic(topic);
        int numPartitions = partitions.size();
        String strKey = (String)key;
        String partitionToken = strKey.substring(0, strKey.indexOf('.')); // dept1 ~ dept5
		return partitionToken.hashCode() % numPartitions;
	}

}