Package io.hekate.partition

Class PartitionMapperBase

java.lang.Object

io.hekate.partition.PartitionMapperBase

All Implemented Interfaces:

PartitionMapper

Direct Known Subclasses:

RendezvousHashMapper, UpdatablePartitionMapper

public abstract class PartitionMapperBase
extends Object
implements PartitionMapper

Abstract base class for PartitionMapper implementations.

Constructor Summary

Constructors

Constructor	Description
PartitionMapperBase(int partitions, int backupNodes)	Constructs a new instance.

Method Summary

Modifier and Type	Method	Description
int	backupNodes()	Returns the amount of backup nodes that should be assigned to each partition.
Partition	map(Object key)	Maps the specified key to a Partition.
Partition	mapInt(int key)	Maps the specified key of Integer type to a Partition.
int	partitions()	Returns the total amount of partitions.

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.hekate.partition.PartitionMapper

copy, isSnapshot, partition, snapshot, topology

Constructor Detail

PartitionMapperBase

public PartitionMapperBase(int partitions,
                           int backupNodes)

Constructs a new instance.

Parameters:

partitions - See partitions().

backupNodes - See backupNodes().

Method Detail

map

public Partition map(Object key)

Description copied from interface: PartitionMapper

Maps the specified key to a Partition.

Note that the returned Partition instances are immutable and will not reflect changes in the cluster topology. Consider calling this method with the same key in order to obtain the Partition instance with the latest cluster topology mapping.

Specified by:

map in interface PartitionMapper

Parameters:

key - Data key.

Returns:

Partition.

See Also:

Partition.primaryNode(), Partition.backupNodes()

mapInt

public Partition mapInt(int key)

Description copied from interface: PartitionMapper

Maps the specified key of Integer type to a Partition.

Note that the returned Partition instances are immutable and will not reflect changes in the cluster topology. Consider calling this method with the same key in order to obtain the Partition instance with the latest cluster topology mapping.

Specified by:

mapInt in interface PartitionMapper

Parameters:

key - Data key.

Returns:

Partition.

See Also:

Partition.primaryNode(), Partition.backupNodes()

partitions

public int partitions()

Description copied from interface: PartitionMapper

Returns the total amount of partitions.

Specified by:

partitions in interface PartitionMapper

Returns:

Total amount of partitions

backupNodes

public int backupNodes()

Description copied from interface: PartitionMapper

Returns the amount of backup nodes that should be assigned to each partition.

Specified by:

backupNodes in interface PartitionMapper

Returns:

Amount of backup nodes that should be assigned to each partition.