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package org.apache.kafka.clients.producer;
public interface Partitioner extends Configurable {

/**
 * This is called after partitioner is registered.
 */
 public void init(); 

/**
 * Configure partitioner class with given key,value pairs from partitioner.metadata config.
 */
 @override
 public void configure(Map<String, ?> configs);

/**
 * Compute the partition for the given record.
 *
 * @param topic The topic name
 * @param key The key to partition on (or null if no key)
 * @param keyBytes The serialized key to partition on( or null if no key)
 * @param value The value to partition on
 * @param valueBytes The serialized value to partition on
 * @param partition The partition to use (or null if none)
 * @param cluster The current cluster metadata
 */
 public int partition(String topic, Object key, byte[] key, Object value, byte[] value, Cluster cluster);

 /**
  * This is called when partitioner is closed.
  */
  public void close();
  

 }