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Hi,
I can only support to provide the information related to CLL layer & PDO layer. Hope it will be helpful:
PDO Layer
PDO is short form for Procurement Document Layer. PDO layer is available in all SRM versions. PDO layer helps developer highly to write clear and very specific SRM document level coding. PDO Layer is wrapper of BBP Functions for each SRM business transaction type like PO, Shopping Cart, etc. Each PDO layer uses specific Header, Item and other structures for the SRM business transaction. The PDO layer level function modules execute the base associated BBP function module and map into PDO specific structure.
For each PDO object type, SRM provides a set of data structures and function modules. These data structures are very specific to the PDO object type. For example, PO header detail uses specific structure BBP_PDS_PO_HEADER_D for display purpose and BBP_PDS_PO_HEADER_U for update purpose. The BBP function module uses common header detail structure BBP_PDS_HEADER for both display and update purposes.
The PDO get detail FM is not using i_read_flag structure instead the flag is set based on the FM parameters are supplied. The Most of PDO GET detail FMs defaults its parameter i_with_itemdata as ‘X’. That means it will fetch the item level even the item data is requested in the function module. If the item data is not required then explicitly defines the parameter i_with_itemdata as blank. It is very useful tips of SRM performance tuning. Also, try to set the parameter I_WITHOUT_HEADER_TOTALS as blank when header total is not required. The header total may not be part of all PDO get detail function modules.
Performance Tips
Pass i_with_itemdata as blank in BBP_PD_<BO>_GETDETAIL FM when there is no item data required. Also, pass parameter i_without_header_totals as empty (Default is true) when there is no total at header is not required.
The PDO level function modules are listed in below table with BBP function module and PDO level function modules. The PDO layer function module for each object types are defined in the following section. There are a lot of PDO function modules and the table lists only important function modules.
Action | Function Module | PDO Layer |
Check | BBP_PROCDOC_CHECK | BBP_PD_<BO>_CHECK |
Create | BBP_PROCDOC_CREATE | BBP_PD_<BO>_CREATE |
Get Detail | BBP_PROCDOC_GETDETAIL | BBP_ PD_<BO>_GETDETAIL |
Get List | BBP_PROCDOC_GETLIST | BBP_ PD_<BO>_GETLIST |
Item Get Detail | BBP_PROCDOC_ITEM_GETDETAIL | BBP_ PD_<BO>_ITEM_GETDETAIL |
Lock | BBP_PROCDOC_LOCK | BBP_ PD_<BO>_LOCK |
Save | BBP_PROCDOC_SAVE | BBP_ PD_<BO>_SAVE |
Unlock | BBP_PROCDOC_UNLOCK | BBP_ PD_<BO>_UNLOCK |
The standard naming convention is used for PDO Function and it is defined as follows:
BBP_PD_<BO>_GETDETAIL. Possible <BO>s
BO | Description |
AUC | Auction |
AVL | Supplier List |
BID | Bid Invitation (RFx) |
CONF | Confirmation |
CTR | Contract |
INV | Invoice |
PCO | PO Confirmation |
PO | Purchase Order |
QUOT | Quotation |
SC | Shopping Cart |
SUSASN | SUS Advance Notification |
SUSCF | SUS Confirmation |
SUSINV | SUS Invoice |
SUSPCO | SUS PO Confirmation |
SUSPO | SUS Purchase Order |
Note for performance tuning, support package (give package info) uses BORF concept to get detail instead of BBP function. SAP recommends uses PDO layer instead of BBP get details information.
Channel Logic Layer
The Channel Logic Layer is a wrapper on PDO Layer based on the ABAP objects. CLL layer is not available at SRM 5 versions. CLL Layer prepares the business data for UI Layer and do specific operation of the SRM business object. The following are type of objects is available in CLL.
- Business Object (BO) - Business object represents business contents, for example, PO or Shopping Cart. It has all basic operations on the SRM document.
- Dependent Object (DO) - Dependent Object is associated business contents like Account Assignment and Exchange Rate.
- Mapper Object – Mapper object is used to map between UI screens and business data.
Business Objects
The business object is based on ABAP class object. The business object implements the interface classes like /SAPSRM/IF_PDO_BASE and its PDO business object level interfaces. The methods of PDO_BASE interface refers to basic business operations on the SRM document. The table lists the interface classes for each SRM business object. Note that objects suffixed with _ADV refer the object with workflow.
SRM BO | Interface Class |
Auction | /SAPSRM/IF_PDO_BO_AUC |
Contract | /SAPSRM/IF_PDO_BO_CTR_ADV |
PO | /SAPSRM/IF_PDO_BO_PO_ADV |
Quote | /SAPSRM/IF_PDO_BO_QTE_ADV |
Bid Invitation | /SAPSRM/IF_PDO_BO_RFQ_ADV |
Shopping Cart | /SAPSRM/IF_PDO_BO_SC_ADV |
The following table lists the implemented ABAP class for the SRM business objects.
SRM BO | Implemented Class |
Auction | /SAPSRM/CL_PDO_BO_AUC |
Contract | /SAPSRM/CL_PDO_BO_CTR_ADV |
PO | /SAPSRM/CL_PDO_BO_PO_ADV |
Quote | /SAPSRM/CL_PDO_BO_QTE_ADV |
Bid Invitation | /SAPSRM/CL_PDO_BO_RFQ_ADV |
Shopping Cart | /SAPSRM/CL_PDO_BO_SC |
Note that PO object has two implemented classes with and without workflow viz., /SAPSRM/CL_PDO_BO_PO_ADV and /SAPSRM/CL_PDO_BO_PO.
Factory Objects for SRM BO
Factory Objects are static objects where the object instances are stored in the buffer. This is very useful ABAP Objects. Object instances are buffered and reduce the database accesses. It increases performance. All the factory objects have three major methods: get_instance, get_buffered_instance and create_new_instance.
Method | Description |
GET_INSTANCE | Get instance from buffer. If not, get instance from database. It will add to buffered instance. |
GET_BUFFERED_INSTANCE | Get instance from buffer. If not, return nothing. |
GET_NEW_INSTANCE | Destroy instance from buffer if any and create new instance and add it to buffered instance. |
CREATE_NEW_INSTANCE | Create new instance. |
The following factor classes are listed in the following table.
Business Object | Factory Class |
Auction | /SAPSRM/CL_PDO_FACTORY_AUC |
Contract | /SAPSRM/CL_PDO_FACTORY_CTR_ADV |
PO | /SAPSRM/CL_PDO_FACTORY_PO_ADV |
Quote | /SAPSRM/CL_PDO_FACTORY_QTE_ADV |
Bid Invitation | /SAPSRM/CL_PDO_FACTORY_RFQ |
Shopping Cart | /SAPSRM/CL_PDO_FACTORY_SC_ADV |
The following is sample code to using the Factory class to get instance.
DATA lo_pdo_qte TYPE REF TO /sapsrm/if_pdo_bo_qte. CALL METHOD /sapsrm/cl_pdo_factory_qte_adv=>get_instance EXPORTING iv_header_guid = is_header-guid RECEIVING ro_instance = lo_pdo_qte. |
The get instance will get the instance from factory instance table. If there is no entry then it will fetch data from database and insert the instance into instance table.
Based on GUID, model access object returns base record. The following simple example is a wrapper for BBP_PROC_GETDETAIL function module.
DATA: lo_pd_model TYPE REF TO /sapsrm/if_pdo_model_access, lt_status TYPE bbpt_pds_status, ls_header TYPE BBP_PDS_HEADER. lo_pd_model = /sapsrm/cl_pdo_model_factory=>get_instance( ). lo_pd_model-get_detail( EXPORTING iv_guid = iv_header_guid IMPORTING es_header = ls_header et_status = lt_status ). |
Dependent Object
CLL objects support a wide list of dependent objects to get associated section of the data. The dependent class objects interfaces a number of interface classes. The following table lists few of Dependent Object Classes. Each DO object interfaces the corresponding DO interface /SAPSRM/IF_PDO_DO_ <DO>, /SAPSRM/IF_PDO_BO_BASE and /SAPSRM/IF_PDO_XO. The dependent object uses basic BBP function. The DO objects are invoked by the business object. Theses dependent objects are part of attributes in the business object.
SRM DO | Implemented Class |
Condition | /SAPSRM/CL_PDO_DO_CND |
Dynamic Attributes | /SAPSRM/CL_PDO_DO_DYNATTRI |
Exchange Rate | /SAPSRM/CL_PDO_DO_EXR |
Freight | /SAPSRM/CL_PDO_DO_FREIGHT |
History | /SAPSRM/CL_PDO_DO_HISTORY |
Limit | /SAPSRM/CL_PDO_DO_LIMIT |
Long Text | /SAPSRM/CL_PDO_DO_LONGTEXT |
Org data | /SAPSRM/CL_PDO_DO_ORGDATA |
Partner | /SAPSRM/CL_PDO_DO_PARTNER |
SOS | /SAPSRM/CL_PDO_DO_SOS |
Status | /SAPSRM/CL_PDO_DO_STATUS |
Tax | /SAPSRM/CL_PDO_DO_TAX |
Version | /SAPSRM/CL_PDO_DO_VERSION |
Weight | /SAPSRM/CL_PDO_DO_WEIGHT |
Mapper Object
The mapper object creates connection between the UI and Business object. SRM provides a list of BOM (business object mapper) and each object type refers to a BOM. The BOM has been instantiated in the web Dynpro application using the object /SAPSRM/CL_CH_WD_TASKCONTAINER. The BOM mapper instance is created using the ABAP object /SAPSRM/CL_CH_WD_MAP_FACTORY. The factory class has a separate method for each SRM object type.
Object | SRM BO Mapper |
Auction | /SAPSRM/CL_CH_WD_BOM_AUC |
Confirmation | /SAPSRM/CL_CH_WD_BOM_CONF |
Contract | /SAPSRM/CL_CH_WD_BOM_CTR |
Invoice | /SAPSRM/CL_CH_WD_BOM_INV |
Purchase confirmation | /SAPSRM/CL_CH_WD_BOM_PC |
Purchase Order | /SAPSRM/CL_CH_WD_BOM_PO |
Quota Arrangement | /SAPSRM/CL_CH_WD_BOM_QTA |
Quote | /SAPSRM/CL_CH_WD_BOM_QTE |
Bid Invitation | /SAPSRM/CL_CH_WD_BOM_RFQ |
Shopping Cart | /SAPSRM/CL_CH_WD_BOM_SC |
SUS ASN | /SAPSRM/CL_CH_WD_BOM_SUSASN |
SUS Confirmation | /SAPSRM/CL_CH_WD_BOM_SUSCONF |
SUS Invoice | /SAPSRM/CL_CH_WD_BOM_SUSINV |
SUS PO | /SAPSRM/CL_CH_WD_BOM_SUSPO |
Note that above objects implements interfaces /SAPSRM/IF_CLL_MAPPER and other mapper interfaces.
Dependent Object Mapper (DOM) refers a particular section of the document. For example, PO has header overview screen and it refers to DOM mapper /SAPSRM/CL_CH_WD_DODM_PO_OV_H. The DOM classes are instantiated using its own BOM object. The BOM has separate method for each DOM used by SAP.
Thanks,
From RBEI,
Snehal
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