com.bigdata.rdf.sparql.ast.cache

Class DescribeServiceFactory

java.lang.Object

com.bigdata.rdf.sparql.ast.eval.CustomServiceFactoryBase

com.bigdata.rdf.sparql.ast.cache.DescribeServiceFactory

All Implemented Interfaces:

CustomServiceFactory, ServiceFactory

public class DescribeServiceFactory
extends CustomServiceFactoryBase

This service tracks KB updates via an IChangeLog and is responsible for DESCRIBE cache invalidation for resources for which an update has been observed.

Author:

Bryan Thompson

See Also:

BD.DESCRIBE, DESCRIBE cache

Constructor Summary

Constructors

Constructor and Description
DescribeServiceFactory()

Method Summary

Methods

Modifier and Type	Method and Description
ServiceCall<?>	create(ServiceCallCreateParams params) TODO Implement: The DescribeServiceFactory COULD be integrated into query processing using a rewrite of a DESCRIBE or a star-join into an invocation of this service.
IServiceOptions	getServiceOptions() Return options for the service end point.
void	startConnection(BigdataSail.BigdataSailConnection conn) Register an IChangeLog listener that will manage the maintenance of the describe cache.

Methods inherited from class com.bigdata.rdf.sparql.ast.eval.CustomServiceFactoryBase

getDesiredBound, getRequiredBound

Methods inherited from class java.lang.Object

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

Constructor Detail

DescribeServiceFactory

public DescribeServiceFactory()

Method Detail

getServiceOptions

public IServiceOptions getServiceOptions()

Description copied from interface: ServiceFactory

Return options for the service end point. Depending on the implementation, these options MAY be configurable.

create

public ServiceCall<?> create(ServiceCallCreateParams params)

TODO Implement: The DescribeServiceFactory COULD be integrated into query processing using a rewrite of a DESCRIBE or a star-join into an invocation of this service.

Parameters:

params - The pararameters, which are encapsulated by this interface.

Returns:

The object which can be used to evaluate the SERVICE clause.

startConnection

public void startConnection(BigdataSail.BigdataSailConnection conn)

Register an IChangeLog listener that will manage the maintenance of the describe cache.