Skip to Content
author's profile photo Former Member
Former Member

narrow and loose coupling!

what is the difference between narrow and loose coupling in ALE configuration? any advantage in either of the two?

Add a comment
10|10000 characters needed characters exceeded

Related questions

3 Answers

  • Best Answer
    author's profile photo Former Member
    Former Member
    Posted on Dec 05, 2005 at 10:07 AM
    Add a comment
    10|10000 characters needed characters exceeded

  • Posted on Dec 05, 2005 at 10:08 AM
    Add a comment
    10|10000 characters needed characters exceeded

  • author's profile photo Former Member
    Former Member
    Posted on Dec 06, 2005 at 02:40 AM

    Hi!

    The coupling between distributed application systems can be either loose or narrow. A loose coupling is implemented with asynchronous communications and is used for write accesses. A narrow coupling, in contrast, is implemented with synchronous calls, and should only be used for reading data.

    <b>Loose coupling</b> means that the individual systems for the most part communicate asynchronously with each other. In this type of communication, messages are exchanged between the systems. The data format used for these messages is called the Intermediate Document (IDoc).

    In contrast to loose coupling, <b>narrow coupling</b> requires the called system to be available. Narrow coupling is generally implemented using a synchronous call of a remote-capable function module. In contrast to asynchronous communications, the export parameters of the function module can be evaluated.

    Synchronous calls are suitable for verifying or reading data in other systems. ALE supports synchronous BAPI calls starting in Release 4.0. Synchronous dialog calls are supported starting in Release 4.5A. In this case, the caller of the BAPI function module is automatically logged on to the other system (remote login to the “destination”). The user sees the transaction in the same window, and can navigate through the called system using menus and so on. Synchronous dialog methods are visible in the BOR and are modeled in the ALE distribution model.

    More info: http://help.sap.com/saphelp_nw04/helpdata/en/18/22b800773211d396b20004ac96334b/content.htm

    Regards,

    Maxim.

    Add a comment
    10|10000 characters needed characters exceeded

Before answering

You should only submit an answer when you are proposing a solution to the poster's problem. If you want the poster to clarify the question or provide more information, please leave a comment instead, requesting additional details. When answering, please include specifics, such as step-by-step instructions, context for the solution, and links to useful resources. Also, please make sure that you answer complies with our Rules of Engagement.
You must be Logged in to submit an answer.

Up to 10 attachments (including images) can be used with a maximum of 1.0 MB each and 10.5 MB total.