PartitionAwareBackingMap (Oracle® Coherence Java API Reference)

All Superinterfaces:

Map

All Known Implementing Classes:

ObservableSplittingBackingCache, ObservableSplittingBackingCache.CapacityAwareMap, ObservableSplittingBackingMap, PartitionSplittingBackingMap, ReadWriteSplittingBackingMap
```
public interface PartitionAwareBackingMap
extends Map
```
In a partitioned configuration, backing maps that implement the PartitionAwareBackingMap interface are able to react to the partition life-cycle (a partition showing up on a node, or moving away from a node) and manage data more efficiently as a result.

Since:

Coherence 3.5

Author:

cp 2008-11-20

Nested Class Summary
- Nested classes/interfaces inherited from interface java.util.Map
  Map.Entry<K extends Object,V extends Object>

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`createPartition(int nPid)`	Add a partition to the PartitionAwareBackingMap.
`void`	`destroyPartition(int nPid)`	Remove a partition from the PartitionAwareBackingMap.
`BackingMapManager`	`getBackingMapManager()`	Obtain the BackingMapManager that this PartitionAwareBackingMap uses to instantiate and release backing maps.
`String`	`getName()`	Determine the name of the cache for which this PartitionAwareBackingMap exists.
`Map`	`getPartitionMap(int nPid)`	Obtain a Map view for the data in a specific partition.
`Map`	`getPartitionMap(PartitionSet partitions)`	Obtain a Map view for the data in a specific set of partitions.

Methods inherited from interface java.util.Map
clear, compute, computeIfAbsent, computeIfPresent, containsKey, containsValue, entrySet, equals, forEach, get, getOrDefault, hashCode, isEmpty, keySet, merge, put, putAll, putIfAbsent, remove, remove, replace, replace, replaceAll, size, values

- Method Detail
  - getBackingMapManager
```
BackingMapManager getBackingMapManager()
```
    Obtain the BackingMapManager that this PartitionAwareBackingMap uses to instantiate and release backing maps.
    
    Returns:
    
    the BackingMapManager
  - getName
```
String getName()
```
    Determine the name of the cache for which this PartitionAwareBackingMap exists.
    
    Returns:
    
    the cache name
  - createPartition
```
void createPartition(int nPid)
```
    Add a partition to the PartitionAwareBackingMap.
    
    Parameters:
    
    nPid - the partition id that the PartitionAwareBackingMap will be responsible for, starting at this instant
  - destroyPartition
```
void destroyPartition(int nPid)
```
    Remove a partition from the PartitionAwareBackingMap.
    
    Parameters:
    
    nPid - the partition id that the PartitionAwareBackingMap will no longer be responsible for, starting at this instant
  - getPartitionMap
```
Map getPartitionMap(int nPid)
```
    Obtain a Map view for the data in a specific partition.
    
    Parameters:
    
    nPid - the partition ID
    
    Returns:
    
    the backing map (or null if that partition is not owned)
  - getPartitionMap
```
Map getPartitionMap(PartitionSet partitions)
```
    Obtain a Map view for the data in a specific set of partitions.
    
    Parameters:
    
    partitions - the masking PartitionSet
    
    Returns:
    
    a read-only view into a subset of backing maps