SAP ABAP: Services in SAP Architecture :

Services in SAP Architecture :

Example:-

Dialog Service : is provide communication b/w Presentation service and Application server i.e. sap GUI will get the recruitment application and will enter the values.

i.e.: it provide an interface b/w presentation server and application server

Using Dialogue Service access Work Bench.
If we select se11 for tables created
I saved that ztable
That ztable can be saved in Object Navigator means Now this ztables can be stored in Database Server

Update service : is provide interface b/w application service and database i. e after entering the date in application it can store

For to do this service ‘activate’. ACTIVATE: means update can give interface only where as ‘activate’ transfer objects from application server to Database Server.
Now ztable has been created(user defined)whenver object is user defined (i.e table, prog) that object name should start with Y or Z apart from these two letters reserved for SAP

These two services are very important in sap r/3 Architecture

We have to consider that SAP GUI also one of the service and it acts as a front- end service

Gate way service :

· Imagine one organization, it have Finance dept in India, rest of the departments are in

USA

· This respective organization is handling business operations across globally.(Distribution Operations)

· Those Distribution Operation SAP we need to use Gateway environment (ex EAT : RFC)

· To work with Distribution operations

· Gateway Service to work Distributed Business operations in SAP

EX: PEPSI: it has Ind, and

USA

Message Service :

· Any language c, c++, java, if u consider then respective language there is a concept Error Hnadling concepts even in ABAP language also we have Error handling.

· for exception management i e error handling

Spool service :

· having SAP System, under this environment FAX or Email we have

· data should transfer from SAP to FAX or email

· then we need a proper communication between SAP & FAX or Email.

· SAP R/3 can work with external systems i e fax,

· It can provides interface b/w SAP with external systems (ex: fax/email, printers are external systems)

Enque service : provider data integrity in SAP R/3 technologies

Exp for date integrity :

Enque service provider looking and unlocking of object i e

Diagram shows there are two of product x of quantity 100 then using this service it will give Q unlocking facility to customer ‘A’ while ‘A’ creating on order ‘B’ will be locked and vice versa. It product is available Enque works based on Lock object.

5. Background service :

Once program created in ABAP language, the one created and executed in two ways i.e (i)Foreground (ii)Background
Foreground starts executing immediately while executing prog , ABAP programmers should interact with system
If Background service execution starts with future date not immediately while executing system with take care of everything.
In this service user(programmers) interaction is not required

Back ground services. For back ground job scheduling i .e first we select long running programs and give a particular time is weekends for execution in this time system will take care about that execution is called Background service.

i.e.: without user interaction when the system is free that is in the night time or holidays the prog will be executed on the scheduled time.

x- comp

Give data of	Mon	Yearly sales report start execution on Monday it will completed
	TUE
	WED
	THU	by Thursday i.e. performance of regular activities takes slow so we for background service.
	FRI
	SAT	Execution i.e. Saturday. It will executes on weekend. It Makes performance high
	SUN

§ Without user interaction when the system is free is in the high the time (or) holidays) the program will be executed on the scheduled (we required times

6. Database Service : it can store the data permanently in database.

* if any one of this service fails we not able to work with SAP R/3

Services used in SAP R/3 architecture :