Consultingwerk.SmartFramework.Repository.BusinessEntities.MetaBusinessEntity.MetaBusinessEntityDataAccess

Namespace:

Consultingwerk.SmartFramework.Repository.BusinessEntities.MetaBusinessEntity

Class

MetaBusinessEntityDataAccess

Parent classes:

Progress.Lang.Object

Consultingwerk.OERA.DataAccess

Consultingwerk.SmartFramework.SmartDataAccess

Consultingwerk.SmartFramework.Repository.BusinessEntities.RepositoryObjectDataAccess

Consultingwerk.SmartFramework.Repository.BusinessEntities.MetaBusinessEntity.MetaBusinessEntityDataAccess

Inherits:

Consultingwerk.SmartFramework.Repository.BusinessEntities.RepositoryObjectDataAccess

Implements:

Consultingwerk.OERA.IDataAccess, Consultingwerk.OERA.IDataAccessCanFind, Consultingwerk.OERA.IDataAccessCountRecords, IDSQueryStringSource, Consultingwerk.OERA.IProvidesSmartRecordInformation

File:	MetaBusinessEntityDataAccess
Purpose:	Data Access Component
Author(s):	Mike Fechner / Consultingwerk Ltd.
Created:	25.10.2020 21:56:55

Consultingwerk.SmartFramework.Repository.BusinessEntities.MetaBusinessEntity.MetaBusinessEntityBusinessEntity

Top Method Summary

	Options	Name	Purpose
		ActivateRelationeMetaBusinessEntityeMetaDataRelationRelation ()	Activates at eMetaBusinessEntityeMetaDataRelationRelation DATA-RELATION
		ActivateRelationeMetaBusinessEntityeMetaEntityTableRelation ()	Activates at eMetaBusinessEntityeMetaEntityTableRelation DATA-RELATION
		ActivateRelationeMetaBusinessEntityeSmartObjectInstanceRelation ()	Activates at eMetaBusinessEntityeSmartObjectInstanceRelation DATA-RELATION
		AttachDataSources ()	Attaches the DATA-SOURCE objects to the ProDataset Buffers
		BindDataset (dataset)	Do nothing, just receive the parameter and bind to the received Dataset reference
		CommitChanges (handle)	This method is called from SaveChanges in the DA to do the actual database commit and any transaction-related validation logic for a buffer.
		DefineReadEvents ()	TO-DO: Subscribe to ProDataset Event Handlers using SET-CALLBACK as needed
		DetachDataSources ()	Detaches the DATA-SOURCE objects to the ProDataset Buffers
		SaveChanges ()	Save changes to physical storage
		SaveRowChanges (handle)	Overridable method that executes SAVE-ROW-CHANGES on the before buffer
		CHARACTER SourceColumn (character, character)	Returns the database field name matching a temp-table field name contained in a consumers query string (query string vs. temp-table definition)
		CHARACTER SourceDefaultQuery (character)	Returns the base query string used to retrieve data for the temp tables. This query string will be appended by the query provided by the consumer (FetchDataRequest object).

Top Constructor Summary

	Options	Name	Purpose
		MetaBusinessEntityDataAccess (handle)	Constructor for the MetaBusinessEntityDataAccess class

Method Detail

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ActivateRelationeMetaBusinessEntityeMetaDataRelationRelation ()

Purpose:	Activates at eMetaBusinessEntityeMetaDataRelationRelation DATA-RELATION
Notes:

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ActivateRelationeMetaBusinessEntityeMetaEntityTableRelation ()

Purpose:	Activates at eMetaBusinessEntityeMetaEntityTableRelation DATA-RELATION
Notes:

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ActivateRelationeMetaBusinessEntityeSmartObjectInstanceRelation ()

Purpose:	Activates at eMetaBusinessEntityeSmartObjectInstanceRelation DATA-RELATION
Notes:

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AttachDataSources ()

Purpose:	Attaches the DATA-SOURCE objects to the ProDataset Buffers
Notes:	Overrides ABSTRACT method in Consultingwerk.OERA.DataAccess,
	Invoked in FetchData and SaveChanges

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BindDataset (dataset)

Purpose:	Do nothing, just receive the parameter and bind to the received
	Dataset reference
Notes:	Invoked from the class constructor

Parameters:
dsMetaBusinessEntity	DATASET dsMetaBusinessEntity
	DATASET to bind to

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CommitChanges (handle)

Purpose:	This method is called from SaveChanges in the DA
	to do the actual database commit and any transaction-related
	validation logic for a buffer.
Notes:	This is taken directly from the OERI.
	- Note that in this sample that illustrates support for distributed
	business logic the DA saves the whole dataset in SaveChanges, so
	this is not currently called from the BE.
	- The event names are the same as in the OERI. The word "Trans"
	is somewhat misleading as the DA need to support large transactions.
	One could consider using a name that indicates that this is a row
	event instead.

Parameters:
phBuffer	HANDLE
	The handle of the after buffer to commit

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DefineReadEvents ()

Purpose:	TO-DO: Subscribe to ProDataset Event Handlers using SET-CALLBACK
	as needed
Notes:	Overrides ABSTRACT method in Consultingwerk.OERA.DataAccess,
	Invoked in FetchData, note that the callback methods need to be
	PUBLIC and need to have the Dataset defined as an INPUT Parameter.
	Errors thrown from or raised in the FILL call-back methods of the
	DataAccess class (SET-CALLBACK) will stop the Dataset from getting
	filled / filled further. However errors thrown from the call-back
	methods are not thrown from the FILL() method further up into a
	catch block or to the client.
	See http://knowledgebase.progress.com/articles/Article/P188375
Sample:	BUFFER eCustomer:SET-CALLBACK (Consultingwerk.DatasetBufferCallbackEnum:AfterFill,
"eCustomerAfterFill":U)	U) .

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DetachDataSources ()

Purpose:	Detaches the DATA-SOURCE objects to the ProDataset Buffers
Notes:	Overrides ABSTRACT method in Consultingwerk.OERA.DataAccess,
	Invoked in FetchData and SaveChanges

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SaveChanges ()

Purpose:	Save changes to physical storage
Notes:	This implementation of data access save traverses all records in order
to:
	- Allow the DA to control transactions, which cannot be directly
	controlled in distributed BL. Transaction control is a concern of
	the BL, but should not be controlled with TRANSACTION keyword.
	- Offer a course grained save interface from distributed BL
	- The default operation here is just a transaction per record
	- This simple sample does not use child relations to traverse
	the buffers as the OERI BE example. (A property that controls
	update order would give the same effect).
	- Traversing of child data from a parent would make sense if done for
	one parent record at a time.

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SaveRowChanges (handle)

Purpose:	Overridable method that executes SAVE-ROW-CHANGES on the before buffer
Notes:	Called from CommitChanges

Parameters:
phBeforeBuffer	HANDLE
	The handle of the before buffer

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CHARACTER SourceColumn (character, character)

Purpose:	Returns the database field name matching a temp-table field name
	contained in a consumers query string (query string vs. temp-table
	definition)
Notes:	Call-back used by Consultingwerk.OERA.Query.DSQueryString (part of
DataAccess:FetchData	FetchData () query preparation
TO-DO:	Provide code for alternative mapping

Parameters:
pcTable	CHARACTER
	The temp table name to return the source (database table) field name for
pcColumn	CHARACTER
	The temp table column name to return the source (database table) field name for
Returns	CHARACTER
	The database field name mapped to the passed in temp-table field

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CHARACTER SourceDefaultQuery (character)

Purpose:	Returns the base query string used to retrieve data for the temp
	tables. This query string will be appended by the query provided by
	the consumer (FetchDataRequest object).
Notes:	Call-back used by Consultingwerk.OERA.Query.DSQueryString (part of
DataAccess:FetchData	FetchData () query preparation
TO-DO:	Provide code to return the DATA-SOURCE root query string

Parameters:
pcTable	CHARACTER
	The temp table name to return the source default (database) query string for
Returns	CHARACTER
	The base query string used to retrieve data for the given temp-table

Constructor Detail

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MetaBusinessEntityDataAccess (handle)

Purpose:	Constructor for the MetaBusinessEntityDataAccess class
Notes:	Used by the BusinessEntity, will receive the handle of the dataset
	instance form the BusinessEntity as a parameter. Permanently BIND's
	to that dataset using the PRIVATE BindDataset Method.

Parameters:
phDataset	HANDLE
	The handle of the Business Entity dataset

ProDataset Detail

ProDataset dsMetaBusinessEntity

Member tables: eMetaBusinessEntity, eMetaDataRelation, eMetaEntityTable, eMetaRestAddress

Temp-Table Detail

Temp-Table eMetaBusinessEntity

Defined in:

Temp-Table eMetaDataRelation

Defined in:

Temp-Table eMetaEntityTable

Defined in:

Temp-Table eMetaRestAddress

Defined in:

info@consultingwerk.de http://www.consultingwerk.de 13.04.2026 10:25:35