Difference between customer exits and user exits

difference between customer exits and user exits

Hi,
USER EXITS->
1. Introduction:
User exits (Function module exits) are exits developed by SAP.
The exit is implementerd as a call to a functionmodule.
The code for the function module is writeen by the developer.
You are not writing the code directly in the function module,
but in the include that is implemented in the function module.
The naming standard of function modules for functionmodule exits is:
EXIT_<program name><3 digit suffix>
The call to a functionmodule exit is implemented as:
CALL CUSTOMER.-FUNCTION <3 digit suffix>
http://www.sap-img.com/abap/a-short-tutorial-on-user-exits.htm
CUSTOMER EXITS-> t-code CMOD.
As of Release 4.6A SAP provides a new enhancement technique, the Business Add-Ins.
Among others, this enhancement technique has the advantage of
being based on a multi-level system landscape (SAP, country versions, IS solutions, partner,
customer, and so on)
instead of a two-level landscape (SAP, customer) as with the customer exits.
You can create definitions and implementations of business add-ins at any level of the system landscape.
To unify enhancements of the SAP Standard you can migrate customer exits to business add-ins.
http://help.sap.com/saphelp_nw04/helpdata/en/c8/1975cc43b111d1896f0000e8322d00/content.htm
In order to find out the user exits for any tcode,
1. get the developement class of the tcode from SE93.
2. Now goto transaction SMOD and press F4,
3. give in the Deve class in the dev class and Press ENTER
this will show u the exits for any tcode.
or execute this report
http://www.erpgenie.com/sap/abap/code/abap26.htm
which gives the list of exits for a tcode
http://help.sap.com/saphelp_nw04/helpdata/en/bf/ec079f5db911d295ae0000e82de14a/frameset.htm
For information on Exits, check these links
http://www.sap-img.com/abap/a-short-tutorial-on-user-exits.htm
http://www.sapgenie.com/abap/code/abap26.htm
http://www.sap-img.com/abap/what-is-user-exits.htm
http://wiki.ittoolbox.com/index.php/HOWTO:Implement_a_screen_exit_to_a_standard_SAP_transaction
http://www.easymarketplace.de/userexit.php
http://www.sap-img.com/abap/a-short-tutorial-on-user-exits.htm
http://www.sappoint.com/abap/userexit.pdfUser-Exit
Regards
Kiran Sure

Similar Messages

  • Difference between dynamic actions and user exit

    Hi,
    Please help me in when to use table T588z and user exit to write code for dynamic actions.
    Thanks,
    Venkat

    Hi Prasad,
    Find the difference between Dynamic action and user exits.
    Dynamic Action                                              User Exits
    1. Here only initialization of an infotype                    1. Along with initialization of an infotype,                  depending upon other infotype                                    validation also can be done like in
        can be done.                                                        IT 16 the contract end date can not be
                                                                                    entered more than 6 months.
    2. Less time consuming to write.                             2. Require programming approch so more
                                                                                    time consuming.
    3. Table T588Z                                                       3. PBAS0001
    Br/Manas

  • Difference between BADI's and User Exits.

    Hi Experts,
        I want to know the difference between BADI's and User Exits....
    What i know is BADI's are Object oriented But User exits are normal Programs.....i think in User exits also we can write Object oriented program.....
    AND one more is BADI's are multiple use but user exits are not,,,,
    IF BADI's are multiple use like all BADI's are multiple use or some....is there any performance issues,,,i need to know gurus .......and please provide to me more than this.........
    Thanks
    Venkat

    User exits are some provisional space in the standard program for you to write your own business functionality.
    BADI's are soem of the business add-in's that comes along with the standard SAP product but are disabled as most of the customers do not need it. So for those customers who need this will have to activate it and that functionality will be avilable in the transaction.
    - guru
    Reward points for helpful answers

  • Difference between customer exit and user exit?

    hi experts
    difference between customer exit and user exit?

    These r the main differences between user exits and customer exits
    1) user exits r subroutines where as customer exits r function modules
    2) user exits r not upgraded where as customer exits r will upgrade
    3) customer exits r used for creating and additional fields or menu items to stadard tcode where as user exits r used for enabling or disabling the fields on the standrd screen or concatenating the key fields,it is not used adding an additional componenats to stadard tcode
    4) customer exits r reusable where as user exits r not reusable.
    Also:
    1. Customer exits: Implemented as Function Modules within z includes. Anybody can change it and no access key is required.
    2. User Exit: Implemented as subroutines within includes (any include except y or z includes). You need access for the specific include and then you can any subroutine (user exit) within that Include.
    BADIs are the enhanced version of user exits where the same logic is implemented via classes and object (OOP)
    Enchancement point is the latest once introduces with ECC6.0 . Not very sure about that but you can change it without any access key.
    Please go through the following link which will help you understand the exits in a much better way:
    http://help.sap.com/saphelp_nw04/helpdata/en/bf/ec07a25db911d295ae0000e82de14a/content.htm
    http://www.sap-img.com/abap/what-is-the-difference-between-smod-and-cmod.htm
    http://sap.niraj.tripod.com/id21.html
    http://help.sap.com/saphelp_nw04/helpdata/en/c8/1975cc43b111d1896f0000e8322d00/frameset.htm
    http://www.sap-img.com/ab038.htm
    User Exits.
    http://www.erpgenie.com/sap/abap/code/abap26.htm
    http://www.sap-img.com/abap/a-short-tutorial-on-user-exits.htm
    http://www.sapgenie.com/abap/code/abap26.htm
    http://www.sap-img.com/abap/what-is-user-exits.htm
    http://wiki.ittoolbox.com/index.php/HOWTO:Implement_a_screen_exit_to_a_standard_SAP_transaction
    http://www.easymarketplace.de/userexit.php
    http://www.sap-img.com/abap/a-short-tutorial-on-user-exits.htm
    http://www.sappoint.com/abap/userexit.pdfUser-Exit
    customer exits
    https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/f1a7e790-0201-0010-0a8d-f08a4662562d
    Menu Exit.
    http://www.sappoint.com/abap/spmp.pdf
    http://www.sappoint.com/abap/userexit.pdf
    http://www.sapdevelopment.co.uk/enhance/mod_sapmenu.htm
    http://www.sapdevelopment.co.uk/enhance/enhancehome.htm
    1. Previously there were only user-exits.
    2. Then came the concept of customer-exits.
    3. user exits were nothing but subroutines
    FORM/PERFORM
    called from standard programs.
    4. The FORM defintion was placed inside
    an empty include file.
    5. So It was called EVERYTIME.
    and we need to MODIFY/REPAIR the
    standard include .
    6. Then it came with concept of customer-exit
    7. It consists of calling a FUNCTION MODULE,
    which is called only if
    the user-exit is ACTIVATED (other wise not called)
    In this case, the code in put inside
    a pre-defined Z include.
    8. Functionality of both is same, howerver
    we can note the following important differences
    a) Customer exit is called only if activated.
    (hence, it does not waste resources)
    b) in customer exit, REPAIR does not happen
    to the standard include.
    Exits are basically the hooks whcih SAP has provided to add your own code.
    User Exits: These are provided only SD module .
    They are Empty subroutines with naming like USEREXIT_.
    We need to have Access key to implement them.
    Customer Exits: These are enhancement techniques.
    There are defined in SMOD and implemented in CMOD.
    Types of Customer exits: Function exit, Screen Exit, Menu exit.
    User Exit and Customer Exit are same ,but SAP Exit and Customer exit are different...
    Customer Exit,
    Enables you to determine values for variables by means of Functional Module exit.The function module used is EXIT_SAPLRRSO_001.
    Create a project in CMOD by selecting the SAP Enhancement RSR00001 and assign this to the enhanced proj and activate it.
    Customer Exit
    SAP creates customer exits for specific programs, screens, and menus within standard applications. These exits do not contain any functionality. Instead, the customer exits act as hooks. You can hang your own add-on functionality onto these hooks.
    If you want to enhance the functionality of your SAP System, you should take advantage of the exits available in standard applications. There are two main reasons why you should use exits rather than modifying SAP software yourself. Add-ons attached to exits have the advantage that:
    • They do not affect standard SAP source code
    When you add new functionality to your SAP System using SAP’s exits, you do not alter the source code of standard SAP programs in any way. The code and screens you create are encapsulated as separate objects. These customer objects are linked to standard applications, but exist separately from SAP’s standard software package.
    • They do not affect software updates
    When you add new functionality to your SAP System using SAP’s exits, your objects (called customer objects) must adhere to strict naming conventions. When it comes time to upgrade a to a new software release, customer objects’ names ensure that they will not be affected by any changes or new additions to the standard software package.
    Customer exits are not available for all programs and screens found in the SAP System. You can only use customer exits if they already exist in the SAP System. You find find more information about locating applications with pre-defined exits in Locating Applications that have Exits
    http://help.sap.com/saphelp_nw04/helpdata/en/1d/ca10d858c2e949ba4a152c44f8128a/frameset.htm
    SAP EXIT:this processing type contained in variables that are delivered with SAP BW business content.
    http://help.sap.com/saphelp_nw04/helpdata/en/1d/ca10d858c2e949ba4a152c44f8128a/frameset.htm
    User Exits: allow you to add additional functions to the SAP standard.
    Programs with user exits contain subroutine calls at certain points in their syntax that are identified by the prefix USEREXIT. The actual user exits are located in an include that has been assigned to a module pool. This is where customers can include any changes (enhancements) that they want to make to the system. These includes are always processed during program flow.
    Advantage: In principle, customers can modify anything they want that is found in the include (tables, structures, and so forth).
    Disadvantage: SAP cannot check the individual enhancements themselves which often leads to errors
    reward points if found useful
    regards
    palak

  • What is the difference between customer exits and user exits?

    hello friends,
    what is the difference between customer exits and user exits?

    Hi
    User exit - A user exit is a three character code that instructs the system to access a program during system processing.
    SXX: S is for standard exits that are delivered by SAP.   XX represents the 2-digit exit number.
    UXX: U is for user exits that are defined by the user.  XX represents the 2-digit exit number
    Customer exit - The R/3 enhancement concept allows you to add your own functionality to SAP’s standard business applications without having to modify the original applications. SAP creates customer exits for specific programs, screens, and menus within standard R/3 applications. These exits do not contain any functionality. Instead, the customer exits act as hooks. You can hang your own add-on functionality onto these hooks.     *-- Mani
    The following document is about exits in SAP :-
    The R/3 enhancement concept allows you to add your own functionality to SAP’s standard business applications without having to modify the original applications. 
    SAP creates user exits for specific programs, screens, and menus within standard R/3 applications. These exits do not contain any functionality. Instead, the customer exits act as hooks. You can hang your own add-on functionality onto these hooks.
    Types of Exits 
    There are several different types of user exits. Each of these exits acts as hooks where you can attach or "hang" your own add-ons.
    Menu Exits
    Menu exits add items to the pulldown menus in standard SAP applications. You can use these menu items to call up your own screens or to trigger entire add-on applications.
    SAP creates menu exits by defining special menu items in the Menu Painter. These special entries have function codes that begin with "+" (a plus sign). You specify the menu item’s text when activating the item in an add-on project.
    Screen Exits
    Screen exits add fields to screens in R/3 applications. SAP creates screen exits by placing special subscreen areas on a standard R/3 screen and calling a customer subscreen from the standard screen’s flow logic.
    Function Module Exits 
    Function module exits add functions to R/3 applications. Function module exits play a role in both menu and screen exits. 
    When you add a new menu item to a standard pull down menu, you use a function module exit to define the actions that should take place once your menu is activated. 
    Function module exits also control the data flow between standard programs and screen exit fields. SAP application developers create function module exits by writing calls to customer functions into the source code of standard R/3 programs. 
    These calls have the following syntax: 
    CALL CUSTOMER-FUNCTION ‘001’.
    Field Exits
    Field exits allow you to create your own programming logic for any data element in the Dictionary. You can use this logic to carry out checks, conversions, or business-related processing for any screen field.  Example: The data element BBBNR identifies a company’s international location number. You might want to set up your R/3 System so that all international location numbers are larger than 100. 
    The field exit concept lets you create a special function module that contains this logic. 
    You assign the special function module to the data element BBBNR. You then assign the module to any programs and screens in which users can add new international location numbers. When you activate your field exit, the system automatically triggers your special routine whenever a user enters a company location number. 
    In 4.6c, you can use "RSMODPRF" program to create field exits.
    An example of a user exits :-
    MODULE user_exit_0001 INPUT 
        CASE okcode.
            WHEN 'BACK OR EXIT'.
                CASE sy-dynnr.
                        WHEN '100'.
                             SET SCREEN 0.
                             LEAVE SCREEN.
                        WHEN '200'.
                             SET SCREEN 100.
                             LEAVE SCREEN.
                 ENDCASE.
          ENDCASE.

  • Diff b/w "Customer exits" and "User-exit"

    Hi,
    What is the difference b/w customer exits and user-exit and also please explain me what are the various types of customer and user-exits.
    Thanks in advance.
    Ramana

    Hi,
    Types of Exits
    There are several different types of customer exits. Each of these exits acts as hooks where you can attach or "hang" your own add-ons.
    Menu Exits
    Menu exits add items to the pulldown menus in standard SAP applications. You can use these menu items to call up your own screens or to trigger entire add-on applications.
    SAP creates menu exits by defining special menu items in the Menu Painter. These special entries have function codes that begin with "+" (a plus sign). You specify the menu item’s text when activating the item in an add-on project.
    Screen Exits
    Screen exits add fields to screens in R/3 applications. SAP creates screen exits by placing special subscreen areas on a standard R/3 screen and calling a customer subscreen from the standard screen’s flow logic.
    Function Module Exits
    Function module exits add functions to R/3 applications. Function module exits play a role in both menu and screen exits. When you add a new menu item to a standard pulldown menu, you use a function module exit to define the actions that should take place once your menu is activated. Function module exits also control the data flow between standard programs and screen exit fields.
    SAP application developers create function module exits by writing calls to customer functions into the source code of standard R/3 programs. These calls have the following syntax: CALL CUSTOMER-FUNCTION ‘001’.
    <b>User exits:</b>
    https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/library/abap/abap-code-samples/userexits%20in%20a%20transaction.doc
    In order to find out the user exits for any tcode,
    1. get the developement class of the tcode from SE93.
    2. Now goto transaction SMOD and press F4,
    3. give in the Deve class in the dev class and Press ENTER
    this will show u the exits for any tcode.
    or execute this report
    http://www.erpgenie.com/sap/abap/code/abap26.htm
    which gives the list of exits for a tcode
    http://help.sap.com/saphelp_nw04/helpdata/en/bf/ec079f5db911d295ae0000e82de14a/frameset.htm
    For information on Exits, check these links
    http://www.sap-img.com/abap/a-short-tutorial-on-user-exits.htm
    http://www.sapgenie.com/abap/code/abap26.htm
    http://www.sap-img.com/abap/what-is-user-exits.htm
    http://wiki.ittoolbox.com/index.php/HOWTO:Implement_a_screen_exit_to_a_standard_SAP_transaction
    http://www.easymarketplace.de/userexit.php
    http://www.sap-img.com/abap/a-short-tutorial-on-user-exits.htm
    http://www.sappoint.com/abap/userexit.pdfUser-Exit
    http://www.sap-img.com/abap/a-short-tutorial-on-user-exits.htm
    http://www.ficoexpertonline.com/downloads/User%20ExitsWPedit.doc
    http://www.easymarketplace.de/userexit.php
    http://help.sap.com/saphelp_nw04/helpdata/en/c8/1975cc43b111d1896f0000e8322d00/content.htm
    Check out these links too...
    http://www.sap-img.com/abap/a-short-tutorial-on-user-exits.htm
    http://www.sapgenie.com/abap/code/abap26.htm
    http://www.sap-img.com/abap/what-is-user-exits.htm
    http://wiki.ittoolbox.com/index.php/HOWTO:Implement_a_screen_exit_to_a_standard_SAP_transaction
    http://www.easymarketplace.de/userexit.php
    http://www.sap-img.com/abap/a-short-tutorial-on-user-exits.htm
    http://www.sappoint.com/abap/userexit.pdfUser-Exit
    http://www.planetsap.com/userexit_main_page.htm
    http://wiki.ittoolbox.com/index.php/HOWTO:Implement_a_screen_exit_to_a_standard_SAP_transaction
    USER EXITS
    https://forums.sdn.sap.com/click.jspa?searchID=672084&messageID=312792
    https://forums.sdn.sap.com/click.jspa?searchID=672084&messageID=1320078
    https://forums.sdn.sap.com/click.jspa?searchID=672084&messageID=2669896
    ****Reward points if helpful.
    All the best

  • Any difference between Master data and User master data ?

    Any difference between Master data and User master data ?

    hi
    A user master record defines the authorizations assigned to a user. Based on these authorizations one can access the master data.
    Master data - it is the data which is used long term in SAP r/3 system such as vendor master , material master, customer master,
    there is no such thing like user master data to the best of my knowledge
    hope this helps
    regds
    Manan

  • Difference between customizing request and workbench request?

    Hi ,
    What is the difference between customizing request and workbench request?
    please reply.........

    HI,
    <b>Workbench Requests</b>
    When you change a Repository object of the ABAP Workbench, a query window appears in which you need to specify a Workbench request. You can only save the changes if you have assigned the object to a change request.
    Workbench requests and the tasks assigned to them are normally used to record changes to Repository objects and Customizing for all clients. However, you can also include client-specific Customizing.
    Whether the changes to Repository objects are transported depends on whether a transport route is defined from the current SAP System for the package of these objects. From the system settings, the system automatically determines whether the change requests are transportable and to which target system they should be transported.
    <b>Customizing requests</b>
    Customizing requests record client-specific Customizing settings made in a single client (the source client of the request).
    Automatic recording of configuration activities in the Customizing work for a client can be activated or deactivated for each client with Client Control. If automatic recording is active, a query window appears when you change Customizing settings, asking you to specify a Customizing request.
    Whether Customizing requests are transported or not, does not depend on the objects entered, as is the case with Workbench change requests. The Customizing requests in an SAP System (or in a client if you use Extended Transport Control) are either all transportable or all local, depending on the system setting. The system uses the standard transport layer to determine automatically whether the change requests are transportable and to which target system they should be transported. However, you can change this manually.
    pl reward if it helps.
    Thanks
    Sadhu Kishore

  • Difference between custom controller and component controller

    Hi All,
    I am a beginner in CRM SAP .
    Please can anyone tell me whats the difference between custom controller and component controller with some scenario.
    I am totally baffled.
    Thanks in advance.
    Regards
    Shilpi

    Hi Shilpi,
    The main difference between custom and component controller is the role which they play during data transfer.
    a) Custom controller is used for data transfer across two views within a component. For that you need to bind view context nodes to custom controller either through wizard or manually by adding the code in CTXT class create_contextnode method:
    initial setting for depandant model node
        coll_wrapper =
          BTADMINH->get_collection_wrapper( ).
        TRY.
            entity ?= coll_wrapper->get_current( ).
          CATCH cx_sy_move_cast_error.
        ENDTRY.
        IF entity IS BOUND.
          BTOpportH->on_new_focus(
                       focus_bo = entity ).
        ENDIF.
    b)Component controller is used for data transfer across two views in two different components. For this, we need to define the component usage first and then bind the context nodes in the method-WD_USAGE_INITIALIZE of the Component Controller impl class.
        WHEN 'ComponentUsageName'.
          iv_usage->bind_context_node(
                      iv_controller_type  = cl_bsp_wd_controller=>co_type_custom
                      iv_target_node_name = 'ContextNodeName'  "#EC NOTEXT
                      iv_node_2_bind      = 'ContextNodeName' ).  "#EC NOTEXT
    Hope this clears some of your doubts!
    Thanks and Regards,
    Rohit
    P.S-This is valid for CRM 2007.Raghu is also right because Interaction Center is made up of different different components combined together.You have put your question in wrong forum.

  • What is the difference between Custom controller and context controller?

    Hi Gurus,
    What is the difference between Custom and context controller?
    In which occasion we should prefer to use Custom Controller?
    Thanks in Advance,
    Dharani

    You mean difference between custom controller and component controller???
    if yes...
    its been discussed many times.... just go through these threads, you will be clear
    custom controller vs component controller
    Component Controller and Custom comtroller
    [ why we need Custom controllers in Model Applications |why we need Custom controllers in Model Applications;
    [CONTROLLER AND CONTEXT|https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/944ea9e5-0601-0010-65b3-b49a56eb6385]
    Pradeep
    Edited by: pradeep bondla on Jul 22, 2008 12:42 PM

  • Difference between Adhoc package and user created package

    what is the difference between Adhoc package and user created package.
    Thanks,

    Hello Asha,
    Here are some links which would be helpful for you to get started with BPS
    https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/library/biw/s-u/sap bw business planning and simulation - how to guides list.htm
    https://media.sdn.sap.com/public/eclasses/teched04/BW253_files/Default.htm#nopreload=1
    https://www.sdn.sap.com/irj/sdn?rid=/webcontent/uuid/3040dd5d-0501-0010-baa8-fc0aafa88c40 [original link is broken]
    http://help.sap.com/bp_biv235/BI_EN/html/BW/CostCtrPlan.htm
    https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/library/biw/d-f/enhancements bw-bps formerly sem-bps in sapnetweaver 04.ppt
    https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/5d90209f-0501-0010-59a2-9243ac94a4d7
    http://help.sap.com/saphelp_nw04/helpdata/en/05/242537cedf2056e10000009b38f936/frameset.htm
    Also sent you some useful documents. Please check your mail.
    Regards,
    Praveen

  • Difference Between Service Account and User Account

    What is the Difference Between Service Account and User Account

    Hello Mohit,
    Basically there are two types of approches which you should understand.
    In many environments, administrators prefer to simply create a domain user account and assign appropriate privileges to it. Then this user account is used in order to start a specific service on a computer.
    In that case there is really no difference between a user account and the so called service accounts. Since this service account is simply a domain user, all the task related to managing the domain users apply to it. For example you
    should keep the password up to date manually. Some environment move step forward and assign
    Deny Logon Locally of this type of service account in order to enhance the security.
    The second concept is Managed Service Accounts. There are plenty of differences between a Managed Service Account and a User Account.
    The Display Icon is different from a view perspective.
    The type of object is different. 
    Managed service accounts password management is automatic.
    You can not create Managed Service Accounts using GUI. They are only created using Powershell.
    You can refer to link below for more inormation:
    Service Accounts Step-by-Step Guide
    Regards.
    Mahdi Tehrani   |  
      |  
    www.mahditehrani.ir
    Please click on Propose As Answer or to mark this post as
    and helpful for other people.
    This posting is provided AS-IS with no warranties, and confers no rights.
    How to query members of 'Local Administrators' group in all computers?

  • Difference between system status and user status.

    Can someone explain to me the difference between system status and user status in details

    Hi,
    As you mentioned there are 2 status can be maintained for documents like Equipment Master, Notification, Maintenance Order & other important business documents.
    In case, client feels that system status is not enough to capture the details of the object, then user status can be used.
    System statuses will be updated automatically based on business transactions which will be done on SAP.
    For example, once the equipment is created, System status would CRTD (Created). If you install the same to some superior equipment or FL, then status would be INST (Installed).
    If you keeping that equipment in Spare, then for that, you have to maintain separate User Status like AVLB (Available in Stock / Spare) so that through IH08, by using User status, you can the report which is available as spare.
    These user status as per the name, should be updated by the user manually.
    Regards,
    Maheswaran.

  • Difference between implementation guide and user guide.

    Hi All,
    I am a recent graduate, just wanted to know what is teh Difference between implementation guide and user guide.
    Sorry the question may sound to simple but I am not aware of the aswer.
    Regards,

    Hi,
    The implementation guide is the reference that you need to use to do the functional setup while the user guide covers how the navigation of the module/application and tells you how to use it.
    Thanks,
    Hussein

  • Difference between custom controller and interface component

    Hi,
        Can anybody tell me what are the differences between component controller and custome controller , component interface.
    Thanks in advance.
    Regards
    sireesha.

    hi,
    When any component is created web dynpro framework automatically generates the controller(controller is nothing but entity which controls the working of views and acts as a binding layer between model and view), this controller is called Component controller.
    We can have as many controller as we want, but they should be used sparingly, Controller should encapsulate the functionality which is common to whole component , like if your application fetches master data and appliaction data so better you should have 2 controller , 1 for master and 2 for application so as to have modularisation in your application.
    Component Interface is the entity which is used when you want to use the functionality defined in some other component i.e. if your main  component is acting as a parent comopnent then the child component usage should be defined via this interface controller under Component Interface, so that main compo will access it via childs Interface Controller.
    Other node under this , Interface view , gets generated for every creation of window , Interface view is entry point into our application for web Dynpro framework
    jsut check out following links,
    Re: Difference between Component Controller and Custom Controllet...?
    Re: custom vs component controller
    check out these ex for the Component Interface and node under this,
    https://www.sdn.sap.com/irj/sdn/downloaditem?rid=/webcontent/uuid/19e6e990-0201-0010-eca6-a62e342eaad3 [original link is broken]
    https://www.sdn.sap.com/irj/sdn/downloaditem?rid=/webcontent/uuid/1208c2cd-0401-0010-4ab6-f4736074acc6 [original link is broken]
    https://www.sdn.sap.com/irj/sdn/downloaditem?rid=/webcontent/uuid/1ee0e990-0201-0010-75bf-a087c241cb83 [original link is broken]
    hope it helps
    regards

Maybe you are looking for