com.bigdata.bop.fed

Class QueryEngineFactoryBase

java.lang.Object

com.bigdata.bop.fed.QueryEngineFactoryBase

All Implemented Interfaces:

IQueryEngineFactory

public class QueryEngineFactoryBase
extends Object
implements IQueryEngineFactory

Default IQueryEngineFactory implementation.

Author:

bryan

Constructor Summary

Constructors

Constructor and Description
QueryEngineFactoryBase()

Method Summary

Methods

Modifier and Type	Method and Description
QueryEngine	getExistingQueryController(IBTreeManager indexManager) Singleton factory test (does not create the query controller) for standalone or scale-out.
FederatedQueryEngine	getFederatedQueryController(IBigdataFederation<?> fed) New query controller for scale-out.
QueryEngine	getQueryController(IIndexManager indexManager) Singleton factory for standalone or scale-out.
int	getQueryControllerCount() Return the #of live query controllers.
QueryEngine	getStandaloneQueryController(IBTreeManager indexManager) Singleton factory for standalone.
protected QueryEngine	newStandaloneQueryEngine(IBTreeManager indexManager) Initialize a new query engine for the journal.

Methods inherited from class java.lang.Object

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

Constructor Detail

QueryEngineFactoryBase

public QueryEngineFactoryBase()

Method Detail

getExistingQueryController

public QueryEngine getExistingQueryController(IBTreeManager indexManager)

Description copied from interface: IQueryEngineFactory

Singleton factory test (does not create the query controller) for standalone or scale-out.

Specified by:

getExistingQueryController in interface IQueryEngineFactory

Parameters:

indexManager - The database.

Returns:

The query controller iff one has been obtained from the factory and its weak reference has not been cleared.

getQueryController

public QueryEngine getQueryController(IIndexManager indexManager)

Description copied from interface: IQueryEngineFactory

Singleton factory for standalone or scale-out.

Specified by:

getQueryController in interface IQueryEngineFactory

Parameters:

indexManager - The database.

Returns:

The query controller.

getStandaloneQueryController

public QueryEngine getStandaloneQueryController(IBTreeManager indexManager)

Description copied from interface: IQueryEngineFactory

Singleton factory for standalone.

Specified by:

getStandaloneQueryController in interface IQueryEngineFactory

Parameters:

indexManager - The index manager. Can be a TemporaryStore or Journal.

Returns:

The query controller.

newStandaloneQueryEngine

protected QueryEngine newStandaloneQueryEngine(IBTreeManager indexManager)

Initialize a new query engine for the journal.

Parameters:

indexManager - The journal.

Returns:

The new query engine.

getFederatedQueryController

public FederatedQueryEngine getFederatedQueryController(IBigdataFederation<?> fed)

Description copied from interface: IQueryEngineFactory

New query controller for scale-out.

Note: This is NOT used for the QueryEngine that is embedded within the DataService. That instance is setup by the DataService itself and relies on a view of the shards as locally available to the DataService

Specified by:

getFederatedQueryController in interface IQueryEngineFactory

Parameters:

fed - The federation.

Returns:

The query controller.

getQueryControllerCount

public int getQueryControllerCount()

Description copied from interface: IQueryEngineFactory

Return the #of live query controllers.

Specified by:

getQueryControllerCount in interface IQueryEngineFactory