Class AggregationProvider2

This is the main aggregation engine for the Archive Provider system - version 2, with built-in buffering and recursive evaluation

Inheritance
object
AggregationProvider2
Inherited Members
Namespace: SuperOffice.CRM.ArchiveLists.Aggregation
Assembly: SoDataBase.BusinessLogic.dll
Syntax
[NoAggregation]
[ArchiveProvider("AggregationWrapper2", 1073741823)]
public class AggregationProvider2 : IArchiveProvider, IArchiveProviderHasRows, IArchiveProviderHasColumns, IArchiveProviderHasEntities
Remarks

This class is designed to wrap any other archive provider, and introduce the concepts of grouping and aggregation. Think of it as a report generator without the layout part + analytics cube engine.

Constructors

AggregationProvider2(IArchiveProvider)

Constructor, takes the inner provider as mandatory parameter, and discovers aggregator plugins

Declaration
public AggregationProvider2(IArchiveProvider dataProvider)
Parameters
Type Name Description
IArchiveProvider dataProvider
Remarks

This class is designed to wrap any other archive provider, and introduce the concepts of grouping and aggregation. Think of it as a report generator without the layout part + analytics cube engine.

Fields

GrandTotalOption

This is the main aggregation engine for the Archive Provider system - version 2, with built-in buffering and recursive evaluation

Declaration
public const string GrandTotalOption = "GrandTotal"
Field Value
Type Description
string
Remarks

This class is designed to wrap any other archive provider, and introduce the concepts of grouping and aggregation. Think of it as a report generator without the layout part + analytics cube engine.

NeedNoRowSentryOpton

This is the main aggregation engine for the Archive Provider system - version 2, with built-in buffering and recursive evaluation

Declaration
public const string NeedNoRowSentryOpton = "NeedNoRowSentry"
Field Value
Type Description
string
Remarks

This class is designed to wrap any other archive provider, and introduce the concepts of grouping and aggregation. Think of it as a report generator without the layout part + analytics cube engine.

ProviderName

This is the main aggregation engine for the Archive Provider system - version 2, with built-in buffering and recursive evaluation

Declaration
public const string ProviderName = "AggregationWrapper2"
Field Value
Type Description
string
Remarks

This class is designed to wrap any other archive provider, and introduce the concepts of grouping and aggregation. Think of it as a report generator without the layout part + analytics cube engine.

Methods

Close()

Call this method after the last desired row has been read; this gives the provider the chance to close and free any underlying queries

Declaration
public void Close()
Remarks

This class is designed to wrap any other archive provider, and introduce the concepts of grouping and aggregation. Think of it as a report generator without the layout part + analytics cube engine.

GetAvailableColumns()

Get the list of columns handled by this provider

Declaration
public List<ArchiveColumnInfo> GetAvailableColumns()
Returns
Type Description
List<ArchiveColumnInfo>
Remarks

This class is designed to wrap any other archive provider, and introduce the concepts of grouping and aggregation. Think of it as a report generator without the layout part + analytics cube engine.

GetAvailableEntities()

Get the list of entities supported by this provider

Declaration
public List<ArchiveRowTypeInfo> GetAvailableEntities()
Returns
Type Description
List<ArchiveRowTypeInfo>
Remarks

This class is designed to wrap any other archive provider, and introduce the concepts of grouping and aggregation. Think of it as a report generator without the layout part + analytics cube engine.

GetReaderAsync(string, CancellationToken)

Start the reader and return an IDataReader (which, as we remember, also inherits IDataRecord for access to individual data fields). This provides an alternative, more generic and more standards-based interface to data. Use either GetRows or GetReader on any particular archive provider instance.

Declaration
public Task<DbDataReader> GetReaderAsync(string options, CancellationToken cancellationToken = default)
Parameters
Type Name Description
string options
CancellationToken cancellationToken
Returns
Type Description
Task<DbDataReader>
Remarks

This class is designed to wrap any other archive provider, and introduce the concepts of grouping and aggregation. Think of it as a report generator without the layout part + analytics cube engine.

GetResultInformationAsync()

Get additional information about the result, such as row count or other optional items. This method should be called after GetRowsAsync(string, CancellationToken), but before Close.

Declaration
public Task<ArchiveResultInformation> GetResultInformationAsync()
Returns
Type Description
Task<ArchiveResultInformation>
Remarks

This class is designed to wrap any other archive provider, and introduce the concepts of grouping and aggregation. Think of it as a report generator without the layout part + analytics cube engine.

GetRowsAsync(string, CancellationToken)

Start the query and return an iterator. The .Current property will be a valid ArchiveRow containing one row, as long as a previous call to .MoveNext returned true. This is the standard semantics for an iterator. Do remember to call Close afterwards, to clean up all resources.

Declaration
public IAsyncEnumerable<ArchiveRow> GetRowsAsync(string options, CancellationToken cancellationToken = default)
Parameters
Type Name Description
string options

A set of options, using the query string format (name=value&...). Can be null or empty.

OptionPurpose/effect
countrows=truePrepare to return a count of the full result set
Options set here may trigger additional, asynchronous processing that will prepare results for the GetInformation method, if possible.
CancellationToken cancellationToken
Returns
Type Description
IAsyncEnumerable<ArchiveRow>

An iterator, following the usual conventions. MoveNext will return false when there are no more rows, which can either be because the result set is exhausted, or because the page size has been reached
Remarks

You can use the await foreach keyword to iterate over rows, like this:

IArchiveProvider provider = ArchiveProviderFactory.Create("person");
// not shown - set desired columns, entities, restrictions, paging
await foreach( ArchiveRow row in provider.GetRowsAsync() )
{
	// process row here
}
provider.Close();

SetDesiredColumns(params string[])

Set which columns should actually be returned, must be a subset of the GetAvailableColumns result

Declaration
public void SetDesiredColumns(params string[] columnIds)
Parameters
Type Name Description
string[] columnIds

Array of column ID's representing the desired columns
Remarks

This class is designed to wrap any other archive provider, and introduce the concepts of grouping and aggregation. Think of it as a report generator without the layout part + analytics cube engine.

SetDesiredEntities(params string[])

This is the main aggregation engine for the Archive Provider system - version 2, with built-in buffering and recursive evaluation

Declaration
public void SetDesiredEntities(params string[] entities)
Parameters
Type Name Description
string[] entities

Array of entity names, semantically equivalent to ArchiveEntityInfo.Name fields.
Remarks

This class is designed to wrap any other archive provider, and introduce the concepts of grouping and aggregation. Think of it as a report generator without the layout part + analytics cube engine.

SetOrderBy(params ArchiveOrderByInfo[])

This is the main aggregation engine for the Archive Provider system - version 2, with built-in buffering and recursive evaluation

Declaration
public void SetOrderBy(params ArchiveOrderByInfo[] orderBy)
Parameters
Type Name Description
ArchiveOrderByInfo[] orderBy

Array of order by items
Remarks

This class is designed to wrap any other archive provider, and introduce the concepts of grouping and aggregation. Think of it as a report generator without the layout part + analytics cube engine.

SetPagingInfo(int, int)

Set the paging properties of the provider. The default is to fetch page zero, of one thousand (1000) rows. A more reasonable page size is probably around 100. Note that the query processing strategy may change for very large pages (more than 1000) and give significantly longer response times. Performance is improved by setting the page size low, as long as you don't set it lower than what you realistically expect to need (fetching multiple pages is more expensive than fetching one).

Declaration
public void SetPagingInfo(int pageSize, int pageNumber)
Parameters
Type Name Description
int pageSize

Desired page size
int pageNumber

Desired page number to return
Remarks

This class is designed to wrap any other archive provider, and introduce the concepts of grouping and aggregation. Think of it as a report generator without the layout part + analytics cube engine.

SetRestriction(params ArchiveRestrictionInfo[])

Set query restriction globally, supersedes previous restrictions

Declaration
public bool SetRestriction(params ArchiveRestrictionInfo[] restrictions)
Parameters
Type Name Description
ArchiveRestrictionInfo[] restrictions

Array of restrictions, with an implicit AND between them
Returns
Type Description
bool

true if at least one of the restrictions matched one of the available columns of the provider
Remarks

This class is designed to wrap any other archive provider, and introduce the concepts of grouping and aggregation. Think of it as a report generator without the layout part + analytics cube engine.

Implements

Extension Methods