BaseTransactionalQuadDataset Class

Abstract Base class for quad datasets that support transactions.

Inheritance Hierarchy

SystemObject
  VDS.RDF.Query.DatasetsBaseQuadDataset
    VDS.RDF.Query.DatasetsBaseTransactionalQuadDataset
      VDS.RDF.Query.DatasetsInMemoryQuadDataset

Namespace: VDS.RDF.Query.Datasets
Assembly: dotNetRDF (in dotNetRDF.dll) Version:

Syntax

Copy

public abstract class BaseTransactionalQuadDataset : BaseQuadDataset

Public MustInherit Class BaseTransactionalQuadDataset
	Inherits BaseQuadDataset

The BaseTransactionalQuadDataset type exposes the following members.

Constructors

	Name	Description
	BaseTransactionalQuadDataset	Creates a Transactional Quad Dataset.
	BaseTransactionalQuadDataset(Boolean)	Creates a Transactional Quad Dataset.
	BaseTransactionalQuadDataset(Uri)	Creates a Transactional Quad Dataset.

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Properties

	Name	Description
	ActiveGraphUris	Gets the Active Graph URIs. (Inherited from BaseQuadDataset.)
	DefaultGraphUris	Gets the Default Graph URIs. (Inherited from BaseQuadDataset.)
	Graphs	Gets the Graphs in the dataset. (Inherited from BaseQuadDataset.)
	GraphUris	Gets the URIs of the graphs in the dataset. (Inherited from BaseQuadDataset.)
	HasTriples	Gets whether the dataset has any triples. (Inherited from BaseQuadDataset.)
	Item	Gets a Graph from the dataset. (Overrides BaseQuadDatasetItemUri.)
	Triples	Gets all triples from the dataset. (Inherited from BaseQuadDataset.)
	UsesUnionDefaultGraph	Gets whether this dataset uses a union default graph. (Inherited from BaseQuadDataset.)

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Methods

	Name	Description
	AddGraph	Adds a Graph to the Dataset. (Overrides BaseQuadDatasetAddGraph(IGraph).)
	AddGraphInternal	Adds a Graph to the Dataset.
	AddQuad	Adds a Quad to the Dataset. (Inherited from BaseQuadDataset.)
	ContainsQuad	Gets whether a Triple exists in a specific Graph of the dataset. (Inherited from BaseQuadDataset.)
	ContainsTriple	Gets whether the dataset contains a triple. (Inherited from BaseQuadDataset.)
	Discard	Ensures that any changes to the Dataset (if any) are discarded. (Overrides BaseQuadDatasetDiscard.)
	DiscardInternal	Allows the derived dataset to take any post-Discard() actions required.
	Equals	Determines whether the specified object is equal to the current object. (Inherited from Object.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
	Flush	Ensures that any changes to the Dataset (if any) are flushed to the underlying Storage. (Overrides BaseQuadDatasetFlush.)
	FlushInternal	Allows the derived dataset to take any post-Flush() actions required.
	GetGraphInternal	Gets a Graph from the dataset. (Inherited from BaseQuadDataset.)
	GetHashCode	Serves as the default hash function. (Inherited from Object.)
	GetModifiableGraph	Gets a Graph from the Dataset that can be modified. (Overrides BaseQuadDatasetGetModifiableGraph(Uri).)
	GetModifiableGraphInternal	Gets a Graph from the Dataset that can be modified transactionally.
	GetQuads	Gets all the Triples for a specific graph of the dataset. (Inherited from BaseQuadDataset.)
	GetQuadsWithObject	Gets all the Triples with a given object from a specific graph of the dataset. (Inherited from BaseQuadDataset.)
	GetQuadsWithPredicate	Gets all the Triples with a given predicate from a specific graph of the dataset. (Inherited from BaseQuadDataset.)
	GetQuadsWithPredicateObject	Gets all the Triples with a given predicate and object from a specific graph of the dataset. (Inherited from BaseQuadDataset.)
	GetQuadsWithSubject	Gets all the Triples with a given subject from a specific graph of the dataset. (Inherited from BaseQuadDataset.)
	GetQuadsWithSubjectObject	Gets all the Triples with a given subject and object from a specific graph of the dataset. (Inherited from BaseQuadDataset.)
	GetQuadsWithSubjectPredicate	Gets all the Triples with a given subject and predicate from a specific graph of the dataset. (Inherited from BaseQuadDataset.)
	GetTriplesWithObject	Gets all the Triples with a given object. (Inherited from BaseQuadDataset.)
	GetTriplesWithPredicate	Gets all the Triples with a given predicate. (Inherited from BaseQuadDataset.)
	GetTriplesWithPredicateObject	Gets all the Triples with a given predicate and object. (Inherited from BaseQuadDataset.)
	GetTriplesWithSubject	Gets all the Triples with a given subject. (Inherited from BaseQuadDataset.)
	GetTriplesWithSubjectObject	Gets all the Triples with a given subject and object. (Inherited from BaseQuadDataset.)
	GetTriplesWithSubjectPredicate	Gets all the Triples with a given subject and predicate. (Inherited from BaseQuadDataset.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	HasGraph	Gets whether a Graph with the given URI is the Dataset. (Inherited from BaseQuadDataset.)
	HasGraphInternal	Determines whether a given Graph exists in the Dataset. (Inherited from BaseQuadDataset.)
	IsDefaultGraph	Gets whether the given URI represents the default graph of the dataset. (Inherited from BaseQuadDataset.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	RemoveGraph	Removes a Graph from the Dataset. (Overrides BaseQuadDatasetRemoveGraph(Uri).)
	RemoveGraphInternal	Removes a Graph from the dataset.
	RemoveQuad	Removes a Quad from the Dataset. (Inherited from BaseQuadDataset.)
	ResetActiveGraph	Resets the Active Graph. (Inherited from BaseQuadDataset.)
	ResetDefaultGraph	Resets the Default Graph. (Inherited from BaseQuadDataset.)
	SetActiveGraph(IEnumerableUri)	Sets the Active Graph. (Inherited from BaseQuadDataset.)
	SetActiveGraph(Uri)	Sets the Active Graph. (Inherited from BaseQuadDataset.)
	SetDefaultGraph(IEnumerableUri)	Sets the Default Graph. (Inherited from BaseQuadDataset.)
	SetDefaultGraph(Uri)	Sets the Default Graph. (Inherited from BaseQuadDataset.)
	ToString	Returns a string that represents the current object. (Inherited from Object.)

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Remarks

The Transaction implementation of dotNetRDF is based upon a MRSW concurrency model, since only one writer may be active changes are immediately pushed to the dataset and visible within the transaction and they are committed or rolled back when Flush() or Discard() are called.

So in practical terms it is perfectly OK for the storage to be updated during a transaction because if the transaction fails the changes will be rolled back because all changes are stored in-memory until the end of the transaction. This may not be an ideal transaction model for all scenarios so you may wish to implement your own version of transactions or code your implementations of the abstract methods accordingly to limit actual persistence to the end of a transaction.

Reference

VDS.RDF.Query.Datasets Namespace