Package com.arpnetworking.clusteraggregator.partitioning

Class DatabasePartitionSet

java.lang.Object

com.arpnetworking.clusteraggregator.partitioning.DatabasePartitionSet

All Implemented Interfaces:

PartitionSet

public class DatabasePartitionSet
extends Object
implements PartitionSet

A partition set that is backed by an eBean database.

Author:

Brandon Arp (brandon dot arp at inscopemetrics dot com)

Constructor Summary

Constructors

Constructor	Description
DatabasePartitionSet(Database database, PartitionSet partitionSet)	Public constructor.

Method Summary

Modifier and Type	Method	Description
Optional<Integer>	getExistingPartition(String key)	Will return an existing partition mapping, or Optional.absent if one does not exist.
Optional<Integer>	getOrCreatePartition(String key)	Will return the partition mapping, creating one if possible.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

DatabasePartitionSet

public DatabasePartitionSet(Database database,
 PartitionSet partitionSet)

Public constructor.

Parameters:

database - The database to use to back the data

partitionSet - The partition set model backing this instance

Method Details

getExistingPartition

public Optional<Integer> getExistingPartition(String key)

Description copied from interface: PartitionSet

Will return an existing partition mapping, or Optional.absent if one does not exist.

Specified by:

getExistingPartition in interface PartitionSet

Parameters:

key - the key to be partitioned

Returns:

a partition number

getOrCreatePartition

public Optional<Integer> getOrCreatePartition(String key)

Description copied from interface: PartitionSet

Will return the partition mapping, creating one if possible. Will return Optional.absent() if a partition is unable to be created for the key.

Specified by:

getOrCreatePartition in interface PartitionSet

Parameters:

key - the key to be partitioned

Returns:

optionally, a partition number