Difference between action and event

Hi
while creating an action, we will find action & event handler. What is the difference between Action and event. If anyone provide with examples, it will be helpful for me.
regards,
vijaya.

HI,
In simple words we can put it as..IF you need any user interaction.. i.e. if your logic is based upon how user interact with your application then use Action..
e.g. Buttons, dropdown UI elements...etc..
Means actions are act between user and your application.
But your application not only communicate with user.But also communicate with server too.
so to communicate with server you need and Event
Note. In Web Dynpro, events are called actions if they are sent from the client to the server.

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What is the difference between action and workflow? How do I decide that I need an action in a transaction and not a workflow and vice versa?

Dear Experts,
I have few doubts and request your expert inputs to clarify my doubts.
What is the difference between action and workflow? How do I decide that I need an action in a transaction and not a workflow and vice versa?
Your earliest response is highly appreciated.
Thanks,
SMTP

Hi SMTP,
First of all, as I mentioned action is nothing but an executable work item which is designed in the workflow itself. In other words, Workflow is like your OOPS class. At run time, workflow instances are created just like objects of classes. Now, the steps designed in the workflow are called TASKS and the instances of tasks are called WORKITEMS. Now, the work items where any user action is required are called executable work items. ANd the work items where no user action is required (for example, sending an email in background) are called non-executable work items.
Whether to go with development of workflow or not depends upon your business scenario. If your requirement is only to send an email and you find any BAdi or exit where in you can write your logic then there is no need of creating a workflow. If there is a defined business process with defined users and time lines, then you can go with the development of workflows.
Rest, the below link will help you in understanding basic concepts of workflow :
Why use SAP Workflow? | Insight Consulting Partners
Regards,
Richa

Difference between action and actionListener

I would like to tell me which is the difference between an action and an actionListener in the following example:
<h:form style="text-align:center">
<h:commandButton image="mountrushmore.jpg"
actionListener="#{rushmore.listen}"
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</h:form>Which method of the rushmore bean is invoked first the listen() or the act()? Based on the JSF lifecycle the action events are invoked in the Invoke Application Phase correct?So first we have the process of validation and then the action is invoked right?And then the listener?
Thanks in advance.

Action = Executed in the invoke application phase. Runs a method in a bean that returns a String object. The String is used by the navigation system to determine which page to render next. The rules for this are set up in the faces-config.xml file, in the navigation-rule sections.
ActionListener = Executed in the invoke application phase. Is triggered when the action event occurs for the component the listener is attached too. This listener can perform miscellaneous actions required when the button is clicked, but does not return a String that affects the navigation.
What order do they get called? Try this out!
http://www.jsftutorials.net/faces-config/phaseTracker.html
It'll help you understand the JSF lifecycle. Which is VERY important, especially when those weird errors start occurring (or JSF seems to be ignoring your commands).
CowKing

Difference between albums and events

If I put pictures into albums from photo stream, will they be permanently saved in the album if I delete them from photo stream to save space on my devices. My iPhone is getting full and I worry that if I take pics off the phone they will disappear from the iPad. I use iCloud, are the back ups separate for each device?
What is the difference between an event and an album that I create?!
Do you get how confused I am!?!!

iPhoto on your iphone correct?
It works pretty much the same as on the mac. Albums are a collage of pictures you want to save. You can then publish if you'd like. An event is kinda the same thing but when I add pictures to my mac or phone you can organize folder by an event ie. Birthday, Graduation, Trip, etc. I typically organize first on my mac then sync iPhoto to the device (iPhone).
Photo Stream saves the last 30 days of pictures on all iOs device and macs. The pictures do take up room on the phone but you can actually disable that feature on your iphone using Setting, iCloud, turn off Photo streaming. The pictures will be removed from the iphone but will still appear on all Photo Streaming devices that still have Photo Streaming enabled.
I hope that makes sense.
The pictures are only permanently saved from Photo Stream (PS) by clicking the photo in PS and save to an event. I would do this before you turn off Photo Stream on the iphone device.

Difference between ALBUM and EVENT?

Can someone please tell me what the difference is between an ALBUM and an EVENT?
I am a little confused as to what the actual differences are.

An Event is a folder of images with a fancy icon in the iPhoto Window. The contents of the particular Event are decided by the date and time of the Photos. Events are a view of the Library. So, every photo is in an Event because every photo is in the Library. That means if you want to have the same photo in two Events it uses twice the disk space.
An Album is an arbitrary collection of Photos - My Favourites, Pics of My Dog from various dates and so on. Photos in an Album simply reference the pics in the Library - so a Photo can be in any number of Albums and use no extra disk space at all.
One way to look at it: Events are basic, automatic, crude organisation. It's all date and time.
Albums allow you to select, to group on other bases - like the content, the quality, the importance of the photo. So, go to a wedding, shoot 300 photos. They all go into the Event. Then pick the best 50 and make an Album from them. Be nice to your friends. Only show them the Album
FWIW:
I use Events simply as big buckets of Photos: Spring 08, July - Nov 06 are typical Events in my Library. I use keywords and Smart Albums extensively. I title the pics broadly.
I keyword on a
Who
What
Where basis (The When is in the photos's Exif metadata). I also rate the pics on a 1 - 5 star basis.
Using this system I can find pretty much find any pic in my 40k library in a couple of seconds.
So, for example, I have a batch of pics titled 'Seattle 08' and a typical keywording might include: John, Anne, Landscape, mountain, trees, snow. With a rating included it's so very easy to find the best pics we took at Mount Rainier.
File -> New Smart Album
set it to 'All"
title contains Seattle
keyword is mountain
keyword is snow
rating is 5 stars
Or, want a chronological album of John from birth to today?
New Smart Album
Keyword is John
Set the View options to Sort By Date Ascending
Want only the best pics?
add Rating is greater than 4 stars
The best thing about this system is that it's dynamic. If I add 50 more pics of John to the Library tomorrow, as I keyword and rate them they are added to the Smart Album.
In the end, organisation is about finding the pics. The point is to make locating that pic or batch of pics findable fast. This system works for me.

Differences between Monitor and Decrypt actions in Decryption Policies

Hi Everybody,
Currently I'm working in my first WSA (S170) implementation and some questions has popped up while I was configuring the Decryption policies. The main question here is:
What are the differences between "monitor" and "decrypt" in the URL Filtering options. As I understand the "decrypt" action allows the WSA to decrypt the packet and treats it like a plain HTTP packet applying the Access Policies, malware inspection and so on. Then I do not really know what the Monitor option does, I'm assuming that it does not decrypt the packet and only checks the destination URL and to allow or not the connection.
Thanks in advance for your collaboration.
Jose M. Cortes H.

If you set it for Decrypt, it always decrypts stuff in that category.
If you set it to monitor, then other criteria in the policy are used for whether to decrypt or not, such as Web Reputation...
Here's the flow, which I pulled from the online help:
https://wsaip:port/help/wsa_help/index.html?Decryption_policies11.html#wp1208329

Difference between LSO and Training and Event Management

Dear Experts,
Can anybody pls thow some light on the Difference between LSO and Training and Event Management.
Thanks in advance
Regards
Aniruddha

Hi Aniruddha Mahulikar,
The Difference between LSO and Training and Event Management are in the functions such as Authoring Environment, Learning Portal, Online tests and ....... which are not available in TEM module.
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Difference between BAPI and IDocs

hello all
what is difference between BAPI and IDocs

Hi,
BAPI
One of the big plusses for BAPIs is that the interface and function are not supposed to change. This is a big plus when you do upgrades or hot packs because the transaction can change (format, required inputs etc) which means you then need to update the call transaction.
Some of the BAPIs are better documented and easier to use than others. You usually need to perform the BAPI that actually does the COMMIT after you call your BAPI.
The Program coding for calling a BAPI is usually cleaner than setting up the screen flow etc for the Call Transaction.
You don't need to worry about special data circumstances interrupting the normal data flow of the screens and causing errors because of that.
BAPIs probably have better performance since they don't do the screen flow processing.
In general if the BAPI exists for the transaction you want to perform and you can figure out how to use it the BAPI is probably the best way to go.
BAPIs are a subset of the RFC-enabled function modules, especially designed as Application Programming Interface (API) to the SAP business object, or in other words: are function modules officially released by SAP to be called from external programs.
IDOC
IDocs are text encoded documents with a rigid structure that are used to exchange data between R/3 and a foreign system. Instead of calling a program in the destination system directly, the data is first packed into an IDoc and then sent to the receiving system, where it is analyzed and properly processed. Therefore an IDoc data exchange is always an
asynchronous process. The significant difference between simple RFC-calls and IDoc data exchange is the fact, that every action performed on IDocs are protocolled by R/3 and IDocs can be reprocessed if an error occurred in one of the message steps.
While IDocs have to be understood as a data exchange protocol, EDI and ALE are typical use cases for IDocs. R/3 uses IDocs for both EDI and ALE to deliver data to the receiving system. ALE is basically the scheduling mechanism that defines when and between which partners and what kind of data will be exchanged on a regular or event triggered basis. Such a set-up is called an ALE-scenario.
The philosophical difference between EDI and ALE can be pinned as follows: If we send data to an external partner, we generally speak of EDI, while ALE is a mechanism to reliable replicate data between trusting systems to store a redundant copy of the IDoc data. The difference is made clear, when we think of a purchase order that is sent as an IDoc. If we send the purchase order to a supplier then the supplier will store the purchase order as a sales order. However, if we send the purchase order via ALE to another R/3 system, then the receiving system will store the purchase order also as a purchase order.
Regards,
Bhaskar

What is the difference between rfc and idoc

hi,
My name is rambabu.can anyone of u please tell me the main differences between idoc and rfc??
Thanks in Advance

hi Ramesh,
Remote Function Calls (RFC) and data exchange through IDoc
message documents. RFC makes direct and synchronous calls of a program in
the remote system. If the caller is an external program it will call an
RFC-enabled function in R/3 and if the calling program is the R/3 system
it will call an RFC-function in another R/3-system or it will call a
non-R/3 program through a gateway-proxy (usually rfcexec.exe). BAPIs are
a subset of the RFC-enabled function modules, especially designed as
Application Programming Interface (API) to the SAP business object, or in
other words: are function modules officially released by SAP to be called
from external programs.
IDocs are text encoded documents with a rigid structure that are used to
exchange data between R/3 and a foreign system. Instead of calling a
program in the destination system directly, the data is first packed into
an IDoc and then sent to the receiving system, where it is analyzed and
properly processed. Therefore an IDoc data exchange is always an
asynchronous process. The significant difference between simple RFC-calls
and IDoc data exchange is the fact, that every action performed on IDocs
are protocolled by R/3 and IDocs can be reprocessed if an error occurred
in one of the message steps.
While IDocs have to be understood as a data exchange protocol, EDI and ALE
are typical use cases for IDocs. R/3 uses IDocs for both EDI and ALE to
deliver data to the receiving system. ALE is basically the scheduling
mechanism that defines when and between which partners and what kind of
data will be exchanged on a regular or event triggered basis. Such a
set-up is called an ALE-scenario.
Regards
Sreeram.G.Reddy

Difference between ok_code and sy-ucomm

Hi,
Can any one tell me the difference between ok_code and sy-ucomm

Hi,
Actually OK_CODE and SY-Ucomm are the same. But experts suggest use of OK code for following reason:
In each PAI event that a user triggers by choosing either a pushbutton on the screen or an element in a GUI status, the corresponding function code is placed into the system field SYST-UCOMM or SY-UCOMM and placed in the OK_CODE field (as long as the function code is not empty). Empty function codes are placed in neither the SY-UCOMM field nor the OK_CODE field.
In your ABAP programs, you should work with the OK_CODE field instead of SY-UCOMM. There are two reasons for this: Firstly, the ABAP program has full control over fields declared within it, and secondly, you should never change the value of an ABAP system field. However, you should also always initialize the OK_CODE field in an ABAP program for the following reason:
In the same way that the OK_CODE field in the ABAP program and the system field SY-UCOMM receive the contents of the corresponding screen fields in the PAI event, their contents are also assigned to the OK_CODE screen field and system field SYST-UCOMM in the PBO event. Therefore, you must clear the OK_CODE field in the ABAP program to ensure that the function code of a screen is not already filled in the PBO event with an unwanted value. This is particularly important when the next PAI event can be triggered with an empty function code (for example, using ENTER). Empty function codes do not affect SY-UCOMM or the OK_CODE field, and consequently, the old field contents are transported.

What is difference between Iterator and Collection Wrapper?

Hi all,
I dont understand the actual difference between Iterator and Collection Wrapper. I observed both are used for the same purpose. Could any one please let me know when to use Collection Wrapper and when to use Iterator??
Thanks,
Chinnu.

L_Kiryl is right.
Collections support global iteration (through collection->get_next( )) and local iteration (through iterator->get_next( )).
Each collection has a focus object. Initially, the first object has the focus.
Any global iteration moves the focus, which is published by the event FOCUS_CHANGED of the collection.
If you want to iterate on the collection without moving the focus (and without triggering timeconsuming follow-up processes) you can use local iteration. To do so, request an iterator object from the collection and use this to iterate.
And one more advantage of using iterator: it takes care of deleted entities. If you use global iteration then when you reach deleted entity it will be an exception. But there is no exception with iterator in the same situation.

What is difference between modify and update i am using

hi
what is difference between mofify and update
my requiremen is to have three condition checkec while mofifying or updating from a internal table
the three fields are
cus no
status
date these all are primary key in the database table
so which sould i use modify or update
there might be entry already existing in database table or new entry to be created if already existin it should check on the primary keys and updatat if not it should add a record
pls suggest whihc to use and how to implement the check on teh threee primary key
like if modify ztable from table it_test
now where condition ? can be used or not with modify? and if yes how
if not should i use update will update create a new entry if no entry is there and please give syntex
regards
Arora

Hi Nishant Arora,
Modify: It works in performing two actions.
They are: Insert + Update.
For Example If a record that is exited in database, so you are modifying that record, it updates that particular record.
Similarly, If the is not existed in the database, you are modifying it, it inserts a new record.
Update: Update means just it updates the status, I mean it only updates the record. It doesn't inserts any new record if that particular record is not present in the database.
These are the cases you need to write these statements.
Syntaxes: :
Go through this links please.,
http://help.sap.com/saphelp_nw04/helpdata/en/e7/968aa8b2384dd9835f91e7f8470064/content.htm
http://help.sap.com/saphelp_nw70/helpdata/en/fc/eb35eb358411d1829f0000e829fbfe/content.htm
Reward points if useful
Cheers,
Swamy Kunche
Edited by: Swamy Kunche on Jun 11, 2008 2:41 PM

Difference between DOM and SAX

Difference between DOM and SAX

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you have to evaluate what you need

What's the difference between Routing and Service Callout in ALSB?

I am puzzled by that.
what's the difference between them.
Or what's the situation should use Routing, and that of service callout?

There is little difference between routing and service callout.
Routing is symbolizes the transition of request thread to a response thread starts. (in OSB every invocation of proxy is undertaken by different request and response threads ). So by this definition, there can be only one route node in a pipeline.
Service call out is also used for similar actions as route node , but in pipeline. So service callout can be either in request pipeline (request thread) or in response pipeline (response thread ) . So in a proxy you can have multiple ServiceCallouts but only one route node.
There are some other slight differences.
Manoj

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who can tell me what's the difference between jsp and jsf?
I'm puzzled when I found some of the technology in jsp is so similar to the ones in jsp( javaserver page)

Hi,
Find the difference between JSP and JSF
1. A developer has more control with JSP, but (should) get easier development with JSF
2. Event handling is done differently in JSP (HTTP) and JSF (Java)
3. The UI is designed differently (or should be at least) with JSP (markup) and JSF (components).
4. The end product should also be defined differently - JSP page versus a JSF application.
Is this the only thing that is need to make a decision for either or? Probably not. There are other pieces that need to be taken in account when deciding which technology to use - tools support, enough components, type of application etc.... At this point there are not enough JSF components (although there are some interesting projects underway - Ajaxfaces, Myfaces, ADF Faces, and WebChart 3d) and enterprise tools support is still limited to a few tools vendor. Looking at our ADF Faces components they are currently available as early access (not production) and demands for these components are stacking up, literally, outside my office doorstep. Although I would love to make them production - now! - it is not a viable solution since we are still checking features and fixing critical bugs.
All this combined - not enough enterprise level components in production, lacking tools support etc... - leave customers in a vacuum where the decision is either to continue with JSP, since it is mature and has a wide developer base, or move forward with JSF not sure if the support, or the developers will be there. This is particularly sensitive to customers that need to get started now and be production by summer.
If you are in this vacuum here are some key points promoting JSF:
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2. Built in event and state management
3. Component sets can be provided by any vendor
4. Closer to ASP.Net or Swing development
5. Choice of UI technology
6. Scale up (rich clients)
7. Scale down (mobile devices)
8. Built into J2EE containers in J2EE 5.0 (tentative)

Difference between action and event

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