Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Core / System / Linq / Parallel / QueryOperators / UnaryQueryOperator.cs / 1305376 / UnaryQueryOperator.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== // =+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ // // UnaryQueryOperator.cs // //[....] // // =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- using System.Collections.Generic; using System.Diagnostics.Contracts; namespace System.Linq.Parallel { ////// The base class from which all binary query operators derive, that is, those that /// have two child operators. This introduces some convenience methods for those /// classes, as well as any state common to all subclasses. /// ////// internal abstract class UnaryQueryOperator : QueryOperator { // The single child operator for the current node. private readonly QueryOperator m_child; // The state of the order index of the output of this operator. private OrdinalIndexState m_indexState = OrdinalIndexState.Shuffled; //---------------------------------------------------------------------------------------- // Constructors // internal UnaryQueryOperator(IEnumerable child) : this(QueryOperator .AsQueryOperator(child)) { } internal UnaryQueryOperator(IEnumerable child, bool outputOrdered) : this(QueryOperator .AsQueryOperator(child), outputOrdered) { } private UnaryQueryOperator(QueryOperator child) : this(child, child.OutputOrdered, child.SpecifiedQuerySettings) { } internal UnaryQueryOperator(QueryOperator child, bool outputOrdered) : this(child, outputOrdered, child.SpecifiedQuerySettings) { } private UnaryQueryOperator(QueryOperator child, bool outputOrdered, QuerySettings settings) : base(outputOrdered, settings) { m_child = child; } internal QueryOperator Child { get { return m_child; } } internal override sealed OrdinalIndexState OrdinalIndexState { get { return m_indexState; } } protected void SetOrdinalIndexState(OrdinalIndexState indexState) { m_indexState = indexState; } //--------------------------------------------------------------------------------------- // This method wraps each enumerator in inputStream with an enumerator performing this // operator's transformation. However, instead of returning the transformed partitioned // stream, we pass it to a recipient object by calling recipient.Give (..). That // way, we can "return" a partitioned stream that potentially uses a different order key // from the order key of the input stream. // internal abstract void WrapPartitionedStream ( PartitionedStream inputStream, IPartitionedStreamRecipient recipient, bool preferStriping, QuerySettings settings); //--------------------------------------------------------------------------------------- // Implementation of QueryResults for an unary operator. The results will not be indexible // unless a derived class provides that functionality. // internal class UnaryQueryOperatorResults : QueryResults { protected QueryResults m_childQueryResults; // Results of the child query private UnaryQueryOperator m_op; // Operator that generated these results private QuerySettings m_settings; // Settings collected from the query private bool m_preferStriping; // If the results are indexible, should we use striping when partitioning them internal UnaryQueryOperatorResults(QueryResults childQueryResults, UnaryQueryOperator op, QuerySettings settings, bool preferStriping) { m_childQueryResults = childQueryResults; m_op = op; m_settings = settings; m_preferStriping = preferStriping; } internal override void GivePartitionedStream(IPartitionedStreamRecipient recipient) { Contract.Assert(IsIndexible == (m_op.OrdinalIndexState == OrdinalIndexState.Indexible)); if (m_settings.ExecutionMode.Value == ParallelExecutionMode.Default && m_op.LimitsParallelism) { // We need to run the query sequentially, up to and including this operator IEnumerable opSequential = m_op.AsSequentialQuery(m_settings.CancellationState.ExternalCancellationToken); PartitionedStream result = ExchangeUtilities.PartitionDataSource( opSequential, m_settings.DegreeOfParallelism.Value, m_preferStriping); recipient.Receive (result); } else if (IsIndexible) { // The output of this operator is indexible. Pass the partitioned output into the IPartitionedStreamRecipient. PartitionedStream result = ExchangeUtilities.PartitionDataSource(this, m_settings.DegreeOfParallelism.Value, m_preferStriping); recipient.Receive (result); } else { // The common case: get partitions from the child and wrap each partition. m_childQueryResults.GivePartitionedStream(new ChildResultsRecipient(recipient, m_op, m_preferStriping, m_settings)); } } //--------------------------------------------------------------------------------------- // ChildResultsRecipient is a recipient of a partitioned stream. It receives a partitioned // stream from the child operator, wraps the enumerators with the transformation for this // operator, and passes the partitioned stream along to the next recipient (the parent // operator). // private class ChildResultsRecipient : IPartitionedStreamRecipient { IPartitionedStreamRecipient m_outputRecipient; UnaryQueryOperator m_op; bool m_preferStriping; QuerySettings m_settings; internal ChildResultsRecipient( IPartitionedStreamRecipient outputRecipient, UnaryQueryOperator op, bool preferStriping, QuerySettings settings) { m_outputRecipient = outputRecipient; m_op = op; m_preferStriping = preferStriping; m_settings = settings; } public void Receive (PartitionedStream inputStream) { // Call WrapPartitionedStream on our operator, which will wrap the input // partitioned stream, and pass the result along to m_outputRecipient. m_op.WrapPartitionedStream(inputStream, m_outputRecipient, m_preferStriping, m_settings); } } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== // =+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ // // UnaryQueryOperator.cs // // [....] // // =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- using System.Collections.Generic; using System.Diagnostics.Contracts; namespace System.Linq.Parallel { ////// The base class from which all binary query operators derive, that is, those that /// have two child operators. This introduces some convenience methods for those /// classes, as well as any state common to all subclasses. /// ////// internal abstract class UnaryQueryOperator : QueryOperator { // The single child operator for the current node. private readonly QueryOperator m_child; // The state of the order index of the output of this operator. private OrdinalIndexState m_indexState = OrdinalIndexState.Shuffled; //---------------------------------------------------------------------------------------- // Constructors // internal UnaryQueryOperator(IEnumerable child) : this(QueryOperator .AsQueryOperator(child)) { } internal UnaryQueryOperator(IEnumerable child, bool outputOrdered) : this(QueryOperator .AsQueryOperator(child), outputOrdered) { } private UnaryQueryOperator(QueryOperator child) : this(child, child.OutputOrdered, child.SpecifiedQuerySettings) { } internal UnaryQueryOperator(QueryOperator child, bool outputOrdered) : this(child, outputOrdered, child.SpecifiedQuerySettings) { } private UnaryQueryOperator(QueryOperator child, bool outputOrdered, QuerySettings settings) : base(outputOrdered, settings) { m_child = child; } internal QueryOperator Child { get { return m_child; } } internal override sealed OrdinalIndexState OrdinalIndexState { get { return m_indexState; } } protected void SetOrdinalIndexState(OrdinalIndexState indexState) { m_indexState = indexState; } //--------------------------------------------------------------------------------------- // This method wraps each enumerator in inputStream with an enumerator performing this // operator's transformation. However, instead of returning the transformed partitioned // stream, we pass it to a recipient object by calling recipient.Give (..). That // way, we can "return" a partitioned stream that potentially uses a different order key // from the order key of the input stream. // internal abstract void WrapPartitionedStream ( PartitionedStream inputStream, IPartitionedStreamRecipient recipient, bool preferStriping, QuerySettings settings); //--------------------------------------------------------------------------------------- // Implementation of QueryResults for an unary operator. The results will not be indexible // unless a derived class provides that functionality. // internal class UnaryQueryOperatorResults : QueryResults { protected QueryResults m_childQueryResults; // Results of the child query private UnaryQueryOperator m_op; // Operator that generated these results private QuerySettings m_settings; // Settings collected from the query private bool m_preferStriping; // If the results are indexible, should we use striping when partitioning them internal UnaryQueryOperatorResults(QueryResults childQueryResults, UnaryQueryOperator op, QuerySettings settings, bool preferStriping) { m_childQueryResults = childQueryResults; m_op = op; m_settings = settings; m_preferStriping = preferStriping; } internal override void GivePartitionedStream(IPartitionedStreamRecipient recipient) { Contract.Assert(IsIndexible == (m_op.OrdinalIndexState == OrdinalIndexState.Indexible)); if (m_settings.ExecutionMode.Value == ParallelExecutionMode.Default && m_op.LimitsParallelism) { // We need to run the query sequentially, up to and including this operator IEnumerable opSequential = m_op.AsSequentialQuery(m_settings.CancellationState.ExternalCancellationToken); PartitionedStream result = ExchangeUtilities.PartitionDataSource( opSequential, m_settings.DegreeOfParallelism.Value, m_preferStriping); recipient.Receive (result); } else if (IsIndexible) { // The output of this operator is indexible. Pass the partitioned output into the IPartitionedStreamRecipient. PartitionedStream result = ExchangeUtilities.PartitionDataSource(this, m_settings.DegreeOfParallelism.Value, m_preferStriping); recipient.Receive (result); } else { // The common case: get partitions from the child and wrap each partition. m_childQueryResults.GivePartitionedStream(new ChildResultsRecipient(recipient, m_op, m_preferStriping, m_settings)); } } //--------------------------------------------------------------------------------------- // ChildResultsRecipient is a recipient of a partitioned stream. It receives a partitioned // stream from the child operator, wraps the enumerators with the transformation for this // operator, and passes the partitioned stream along to the next recipient (the parent // operator). // private class ChildResultsRecipient : IPartitionedStreamRecipient { IPartitionedStreamRecipient m_outputRecipient; UnaryQueryOperator m_op; bool m_preferStriping; QuerySettings m_settings; internal ChildResultsRecipient( IPartitionedStreamRecipient outputRecipient, UnaryQueryOperator op, bool preferStriping, QuerySettings settings) { m_outputRecipient = outputRecipient; m_op = op; m_preferStriping = preferStriping; m_settings = settings; } public void Receive (PartitionedStream inputStream) { // Call WrapPartitionedStream on our operator, which will wrap the input // partitioned stream, and pass the result along to m_outputRecipient. m_op.WrapPartitionedStream(inputStream, m_outputRecipient, m_preferStriping, m_settings); } } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- AssemblyBuilder.cs
- FtpCachePolicyElement.cs
- CodeDomConfigurationHandler.cs
- CategoryNameCollection.cs
- httpserverutility.cs
- UnauthorizedWebPart.cs
- MetadataArtifactLoader.cs
- WindowAutomationPeer.cs
- MissingMemberException.cs
- RegexRunner.cs
- AmbientProperties.cs
- ServiceMoniker.cs
- EventLogger.cs
- TreeNode.cs
- DocumentEventArgs.cs
- StrongNameUtility.cs
- ZipIORawDataFileBlock.cs
- FixedBufferAttribute.cs
- SafeHandle.cs
- PathGradientBrush.cs
- TableCellCollection.cs
- FlowDocumentReader.cs
- PathFigure.cs
- StorageEntitySetMapping.cs
- ExceptionList.cs
- RoleService.cs
- LockedActivityGlyph.cs
- MarginCollapsingState.cs
- Source.cs
- RtfControlWordInfo.cs
- UserPreferenceChangedEventArgs.cs
- Label.cs
- XmlAnyElementAttribute.cs
- ConfigurationUtility.cs
- UdpRetransmissionSettings.cs
- PublisherIdentityPermission.cs
- CommandPlan.cs
- NavigationCommands.cs
- DataGridItemCollection.cs
- WindowsClaimSet.cs
- TextBox.cs
- TextChangedEventArgs.cs
- Subtree.cs
- Resources.Designer.cs
- XPathNode.cs
- DataMemberAttribute.cs
- HtmlSelect.cs
- WebResponse.cs
- DecoderNLS.cs
- QueryPageSettingsEventArgs.cs
- SymmetricKey.cs
- PeerObject.cs
- CookieParameter.cs
- objectresult_tresulttype.cs
- SignedXml.cs
- WindowsListView.cs
- CrossSiteScriptingValidation.cs
- Query.cs
- SerializationEventsCache.cs
- ContractCodeDomInfo.cs
- SqlDataSourceStatusEventArgs.cs
- SchemaElementLookUpTableEnumerator.cs
- SchemaManager.cs
- RuntimeEnvironment.cs
- DataGridViewLayoutData.cs
- SocketElement.cs
- GenerateTemporaryAssemblyTask.cs
- Recipient.cs
- RegexCharClass.cs
- ScrollChrome.cs
- EmptyEnumerator.cs
- TagNameToTypeMapper.cs
- RankException.cs
- IndicShape.cs
- WebReferencesBuildProvider.cs
- Geometry.cs
- PropertyMapper.cs
- ProviderMetadata.cs
- DataMemberConverter.cs
- MemberNameValidator.cs
- MapPathBasedVirtualPathProvider.cs
- WebPartZone.cs
- BindingOperations.cs
- DependencyPropertyAttribute.cs
- ObjectPersistData.cs
- EnumBuilder.cs
- ProfileServiceManager.cs
- InputManager.cs
- Vector3DAnimation.cs
- ServiceHttpHandlerFactory.cs
- SpeechDetectedEventArgs.cs
- X509CertificateRecipientServiceCredential.cs
- Function.cs
- MasterPageCodeDomTreeGenerator.cs
- CutCopyPasteHelper.cs
- OneToOneMappingSerializer.cs
- TypeElement.cs
- ToolStripDesignerUtils.cs
- DataGrid.cs
- EntryPointNotFoundException.cs