Class SparqlUpdateEvaluationContext

Evaluation Context for SPARQL Updates evaluated by the libraries Leviathan SPARQL Engine.

Inheritance
System.Object
SparqlUpdateEvaluationContext
Inherited Members
object.Equals(object)
object.Equals(object, object)
object.GetHashCode()
object.GetType()
object.MemberwiseClone()
object.ReferenceEquals(object, object)
object.ToString()
Namespace: VDS.RDF.Update
Assembly: dotNetRdf.dll
Syntax
public class SparqlUpdateEvaluationContext

Constructors

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SparqlUpdateEvaluationContext(ISparqlDataset, ISparqlQueryAlgebraProcessor<BaseMultiset, SparqlEvaluationContext>, LeviathanUpdateOptions)

Creates a new SPARQL Update Evaluation Context.

Declaration
public SparqlUpdateEvaluationContext(ISparqlDataset data, ISparqlQueryAlgebraProcessor<BaseMultiset, SparqlEvaluationContext> processor, LeviathanUpdateOptions options)
Parameters
Type Name Description
ISparqlDataset data

SPARQL Dataset.
ISparqlQueryAlgebraProcessor<BaseMultiset, SparqlEvaluationContext> processor

Query Processor for WHERE clauses.
LeviathanUpdateOptions options

Update (and query) processor options.
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SparqlUpdateEvaluationContext(ISparqlDataset, LeviathanUpdateOptions)

Creates a new SPARQL Update Evaluation Context.

Declaration
public SparqlUpdateEvaluationContext(ISparqlDataset data, LeviathanUpdateOptions options)
Parameters
Type Name Description
ISparqlDataset data

SPARQL Dataset.
LeviathanUpdateOptions options

Update (and query) processor options.
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SparqlUpdateEvaluationContext(SparqlUpdateCommandSet, ISparqlDataset, ISparqlQueryAlgebraProcessor<BaseMultiset, SparqlEvaluationContext>, LeviathanUpdateOptions)

Creates a new SPARQL Update Evaluation Context.

Declaration
public SparqlUpdateEvaluationContext(SparqlUpdateCommandSet commands, ISparqlDataset data, ISparqlQueryAlgebraProcessor<BaseMultiset, SparqlEvaluationContext> processor, LeviathanUpdateOptions options)
Parameters
Type Name Description
SparqlUpdateCommandSet commands

Command Set.
ISparqlDataset data

SPARQL Dataset.
ISparqlQueryAlgebraProcessor<BaseMultiset, SparqlEvaluationContext> processor

Query Processor for WHERE clauses.
LeviathanUpdateOptions options

Update (and query) processor options.
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SparqlUpdateEvaluationContext(SparqlUpdateCommandSet, ISparqlDataset, LeviathanUpdateOptions)

Creates a new SPARQL Update Evaluation Context.

Declaration
public SparqlUpdateEvaluationContext(SparqlUpdateCommandSet commands, ISparqlDataset data, LeviathanUpdateOptions options)
Parameters
Type Name Description
SparqlUpdateCommandSet commands

Command Set.
ISparqlDataset data

SPARQL Dataset.
LeviathanUpdateOptions options

Update (and query) processor options.

Properties

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Commands

Gets the Command Set (if any) that this context pertains to.

Declaration
public SparqlUpdateCommandSet Commands { get; }
Property Value
Type Description
SparqlUpdateCommandSet
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Data

Dataset upon which the Updates are applied.

Declaration
public ISparqlDataset Data { get; }
Property Value
Type Description
ISparqlDataset
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Options

Get the processor options for this context.

Declaration
public LeviathanUpdateOptions Options { get; }
Property Value
Type Description
LeviathanUpdateOptions
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QueryProcessor

Gets the Query Processor used to process the WHERE clauses of DELETE or INSERT commands.

Declaration
public ISparqlQueryAlgebraProcessor<BaseMultiset, SparqlEvaluationContext> QueryProcessor { get; }
Property Value
Type Description
ISparqlQueryAlgebraProcessor<BaseMultiset, SparqlEvaluationContext>
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RemainingTimeout

Gets the Remaining Timeout i.e. the Timeout taking into account time already elapsed.

Declaration
public long RemainingTimeout { get; }
Property Value
Type Description
long
Remarks

If there is no timeout then this is always zero, if there is a timeout this is always >= 1 since any operation that wants to respect the timeout must have a non-zero timeout to actually timeout properly.

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UpdateTime

Retrieves the Time in milliseconds the update took to evaluate.

Declaration
public long UpdateTime { get; }
Property Value
Type Description
long
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UpdateTimeout

Gets the Update Timeout used for the Command Set.

Declaration
public long UpdateTimeout { get; }
Property Value
Type Description
long
Remarks

This is taken either from the Timeout property of the SparqlUpdateCommandSet to which this evaluation context pertains, or from the processor-defined option UpdateExecutionTimeout. To set the Timeout to be used set whichever of those is appropriate prior to evaluating the updates. If there is a Command Set present then it's timeout takes precedence unless it is set to zero (no timeout) in which case the processor-defined timeout setting is applied. You cannot set the Update Timeout to be higher than the processor-defined timeout unless the processor-defined timeout is set to zero (i.e. no global timeout).

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UpdateTimeTicks

Retrieves the Time in ticks the updates took to evaluate.

Declaration
public long UpdateTimeTicks { get; }
Property Value
Type Description
long

Methods

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CheckTimeout()

Checks whether Execution should Time out.

Declaration
public void CheckTimeout()
Exceptions
Type Condition
SparqlUpdateTimeoutException

Thrown if the Update has exceeded the Execution Timeout.
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EndExecution()

Ends the Execution Timer.

Declaration
public void EndExecution()
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StartExecution()

Starts the Execution Timer.

Declaration
public void StartExecution()

Extension Methods