Package uk.gov.gchq.gaffer.mapstore

Class MapStore

java.lang.Object

uk.gov.gchq.gaffer.store.Store

uk.gov.gchq.gaffer.mapstore.MapStore

Direct Known Subclasses:

SingleUseMapStore

public class MapStore
extends Store

An implementation of Store that uses any class that implements Java's Map interface to store the Elements. The Element objects are stored in memory, i.e . no serialisation is performed.

It is designed to support efficient aggregation of properties. The key of the Map is the Element with any group-by properties, and the value is the non-group-by properties. This allows very quick aggregation of properties from a new Element with existing properties.

Indices can optionally be maintained to allow quick look-up of Elements based on EntityIds or EdgeIds.

Field Summary

Fields

Modifier and Type	Field	Description
static Set<StoreTrait>	TRAITS

Constructor Summary

Constructors

Constructor	Description
MapStore()

Method Summary

Modifier and Type	Method	Description
MapImpl	getMapImpl()
MapStoreProperties	getProperties()	Get this Store's StoreProperties.
Set<StoreTrait>	getTraits()	Get the traits supported by this Map Store.
void	initialise(String graphId, Schema schema, StoreProperties properties)
static void	resetStaticMap()

Methods inherited from class uk.gov.gchq.gaffer.store.Store

addOperationChainOptimisers, addOperationHandler, addOperationHandler, createContext, createStore, createStore, execute, execute, executeJob, executeJob, getCaches, getGraphId, getGraphLibrary, getJobTracker, getNextOperations, getOperationChainOptimisers, getOperationChainValidator, getOperationHandler, getOriginalSchema, getSchema, getSupportedOperations, handleOperation, isSupported, optimiseSchema, populateElement, runAsync, setGraphLibrary, setOriginalSchema, updateJsonSerialiser, updateJsonSerialiser, validateSchemas

Methods inherited from class java.lang.Object

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

Field Detail

TRAITS

public static final Set<StoreTrait> TRAITS

Constructor Detail

MapStore

public MapStore()

Method Detail

resetStaticMap

public static void resetStaticMap()

initialise

public void initialise(String graphId,
                       Schema schema,
                       StoreProperties properties)
                throws StoreException

Overrides:

initialise in class Store

Throws:

StoreException

getMapImpl

public MapImpl getMapImpl()

getTraits

public Set<StoreTrait> getTraits()

Get the traits supported by this Map Store. This method is for internal Map Store use only.

Returns:

Map Store Traits

getProperties

public MapStoreProperties getProperties()

Description copied from class: Store

Get this Store's StoreProperties.

Overrides:

getProperties in class Store

Returns:

the instance of StoreProperties, this may contain details such as database connection details.