All Superinterfaces:

Comparable<Partition>

All Known Implementing Classes:

DefaultPartition
```
public interface Partition
extends Comparable<Partition>
```
Data partition.
This interface provides an information about a primary node and its backup nodes that were selected by a partition mapper based on its cluster topology view.

Note that all instances of this interface must be immutable and must not change once obtained from a PartitionMapper.

See Also:

PartitionMapper.map(Object)

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`List<ClusterNode>`	`backupNodes()`	Returns the backup node set of this partition.
`default int`	`compareTo(Partition o)`	Compares this partition with the specified one based on `id()` value.
`default boolean`	`hasBackupNodes()`	Returns `true` if this partition has `backupNodes()`.
`int`	`id()`	Returns the partition identifier.
`default boolean`	`isPrimary(ClusterNode node)`	Returns `true` if the specified node is primary for this partition (see `primaryNode()`).
`default boolean`	`isPrimary(ClusterNodeId node)`	Returns `true` if the specified node is primary for this partition (see `primaryNode()`).
`List<ClusterNode>`	`nodes()`	Returns the set of all nodes that are mapped to this partition (including `primary` and `backup`).
`ClusterNode`	`primaryNode()`	Returns the primary node that is assigned to this partition.
`ClusterTopology`	`topology()`	Returns the cluster topology that this partition is mapped to.

- Method Detail
  - id
```
int id()
```
    Returns the partition identifier.
    
    Returns:
    
    Partition identifier.
  - primaryNode
```
ClusterNode primaryNode()
```
    Returns the primary node that is assigned to this partition.
    
    Returns:
    
    Primary node.
  - backupNodes
```
List<ClusterNode> backupNodes()
```
    Returns the backup node set of this partition.
    
    Returns:
    
    Set of backup nodes or an empty set if there are no backup nodes.
  - nodes
```
List<ClusterNode> nodes()
```
    Returns the set of all nodes that are mapped to this partition (including primary and backup).
    
    Returns:
    
    The set of all nodes that are mapped to this partition.
  - topology
```
ClusterTopology topology()
```
    Returns the cluster topology that this partition is mapped to.
    
    Returns:
    
    Cluster topology that this partition is mapped to.
  - isPrimary
```
default boolean isPrimary(ClusterNodeId node)
```
    Returns true if the specified node is primary for this partition (see primaryNode()).
    
    Parameters:
    
    node - Node identifier.
    
    Returns:
    
    true if the specified node is primary for this partition (see primaryNode()).
  - isPrimary
```
default boolean isPrimary(ClusterNode node)
```
    Returns true if the specified node is primary for this partition (see primaryNode()).
    
    Parameters:
    
    node - Node.
    
    Returns:
    
    true if the specified node is primary for this partition (see primaryNode()).
  - hasBackupNodes
```
default boolean hasBackupNodes()
```
    Returns true if this partition has backupNodes().
    
    Returns:
    
    true if this partition has backupNodes().
  - compareTo
```
default int compareTo(Partition o)
```
    Compares this partition with the specified one based on id() value.
    
    Specified by:
    
    compareTo in interface Comparable<Partition>
    
    Parameters:
    
    o - Other partition.
    
    Returns:
    
    Result of id() values comparison.

Interface Partition

Method Summary

Method Detail

id

primaryNode

backupNodes

nodes

topology

isPrimary

isPrimary

hasBackupNodes

compareTo