When should i opt for an interface in OOPs ABAP?

How to make the best use of interface ? what are its advantages ?...

An interface is an object oriented programming concept. I suggest you read about that on the many many sites on the internet that offer tutorials.
And what I said [here |About interface]still applies.
These forums are not a substitute for learning for yourself - check out the sticky threads at the top of the forum for other suggestions
Message locked. Please note that not paying attention to moderator direction can result in your account being deleted. When you have specific ABAP Object questions, please feel free to ask them.

Similar Messages

Replacing my HDD in my Early 2011 Macbook Pro...Trying to decide between Samsung 840 EVO 250 gb and Crucial M500 240 gb. Samsung is faster but less "mac-friendly". Should I opt for the Crucial due to the "mac-friendliness"?

I have a S.M.A.R.T error on my current Hitachi drive that came with me Early 2011 Macbook pro. Want to upgrade to SSD.
Trying to decide between Samsung 840 EVO 250gb and Crucial M500 240gb, at this gb range, the Samsung is faster and uses less wattage....ONE PROBLEM...I have read many user experiences that note it is much less mac-friendly...
The software samsung offers is not IOS compatible and some report lower than expected speeds after installation...Also apparently the RAPID MODE of the drive, the fastest drive mode is nonexistant when installed on a Macbook pro?
Should I opt for the slower and more power cosuming Crucial M500 240gb SSD because it is more Mac-friendly? Does anyone have a Samsung 840 EVO 250 gb SSD installed in their macbook pro? What has been your experience?
Thanks ahead of time!
Resoure: http://www.tomshardware.com/reviews/crucial-m500-1tb-ssd,3551.html

I decided against the Evo as there are too many Mac users that have had issues with slow speed on them. Even without these, the main speed that Samsung states for the Evo comes form turbo Write which is a PC only feature as is software dependent.
I'm sorry but Crucials M500 is simply too slow compared to modern drives to be recomended. Read speed is ok, but the write is far too slow for the price.
I've used and installed both a Samsung 840 basic and a Samsung 840 Pro in 2 separate Mac books! and currently have the 840 Pro in my own MacBook Pro and it comes very highly recomended. It's all but the fastest Sata III drive you can buy - A few OCZ drives just edge it but the difference is negligible. Samsung by far have the best reliability though when it comes to SSD's. I've been getting 520Mb/s easily on mine consistently, and without getting a MacBook with a PCIe drive you won't get a faster more reliable drive.
I really would recommend nothing else.

When should we go for PreOperation in dynamics crm plugin

i registered more plugin on Post operation.create,update,retrieve,retrievemultiple.Now when should i go for Pre-Operation plugin
Tell some Some scenarious for this Pre-Operation Stage?
hsk srinivas

I believe difference is obvious. Pre plugin is called before information is stored in CRM DB. Post plugin is called after. Recheck following description -
http://msdn.microsoft.com/en-us/library/gg327941.aspx
Dynamics CRM MVP/ Technical Evangelist at
SlickData LLC
My blog

What is interface in oops abap

hi experts.
what is interface in oops abap.
thanks.
subhasis

Like classes, you can define interfaces either globally in the R/3 Repository or locally in an ABAP program. For information about how to define local interfaces, refer to the Class Builder section of the ABAP Workbench Tools documentation. The definition of a local interface <intf> is enclosed in the statements:
INTERFACE <intf>.
ENDINTERFACE.
The definition contains the declaration for all components (attributes, methods, events) of the interface. You can define the same components in an interface as in a class. The components of interfaces do not have to be assigned individually to a visibility section, since they automatically belong to the public section of the class in which the interface is implemented. Interfaces do not have an implementation part, since their methods are implemented in the class that implements the interface.
<b>Implementing Interfaces</b>
Unlike classes, interfaces do not have instances. Instead, interfaces are implemented by classes. To implement an interface in a class, use the statement
INTERFACES <intf>.
in the declaration part of the class. This statement may only appear in the public section of the class.
When you implement an interface in a class, the components of the interface are added to the other components in the public section. A component <icomp> of an interface <intf> can be addressed as though it were a member of the class under the name <intf~icomp>.
The class must implement the methods of all interfaces implemented in it. The implementation part of the class must contain a method implementation for each interface method <imeth>:
METHOD <intf~imeth>.
ENDMETHOD.
Interfaces can be implemented by different classes. Each of these classes is extended by the same set of components. However, the methods of the interface can be implemented differently in each class.
Interfaces allow you to use different classes in a uniform way using interface references (polymorphism). For example, interfaces that are implemented in different classes extend the public scope of each class by the same set of components. If a class does not have any class-specific public components, the interfaces define the entire public face of the class.
<b>
Addressing Objects Using Interface References</b>
To create an object of the class <class>, you must first have declared a reference variable <cref> with reference to the class. If the class <class> implements an interface <intf>, you can use the following assignment between the class reference variable <cref> and an interface reference <iref> to make the interface reference in <iref> point to the same object as the class reference in <cref>:
<iref> = <cref>
If the interface <intf> contains an instance attribute <attr> and an instance method <meth>, you can address the interface components as follows:
Using the class reference variable <cref>:
To access an attribute <attr>: <cref>-><intf~attr>
To call a method <meth>: CALL METHOD <cref>-><intf~meth>
Using the interface reference variable <iref>:
To access an attribute <attr>: < iref>-><attr>
To call a method <meth>: CALL METHOD <iref>-><meth>
As far as the static components of interfaces are concerned, you can only use the interface name to access constants:
Addressing a constant <const>: < intf>=><const>
For all other static components of an interface, you can only use object references or the class <class> that implements the interface:
Addressing a static attribute <attr>: < class>=><intf~attr>
Calling a static method <meth>: CALL METHOD <class>=><intf~meth>

When we will go for an abstract class and when we will go for an interface?

it's always some what confusing to choose an abstract class and an interface,can anybody post a suitable answer for this.

jwenting wrote:
with experience and the insight it brings, you will know which to use when.
Without it, it can't be explained.
More often than not there's no X OR Y anyway.It's fortunate that there are posters here who possess the insight and experience necessary to explain this. The principal differences between an abstract class and an interface are,
1. An abstract class can carry implementation, whereas an interface cannot.
2. An abstract class is singly inherited, wheras an interface is multiply inherited.
So use an abstract class when the implementation it can carry outweights the fact that it cannot be multiply inherited That's the gist of it.
The inheritance relationship where this happens is when the supertype is a general concept of which all potential subtypes are special cases. This is called a specialization (or sometimes a generalization) relationship. For example Apple and Banana are Fruit. Or Car and Bike are Vechicle. The Fruit and Vechicle supertypes are general concepts of which their subtypes are special cases. In this case make Fruit and Vechicle abstract classes because the subtypes will benefit from a shared implementation.
If you don't have a clearcut specialization/generalization relationship make the supertype an interface. An example could be the Comparable supertype. The potential subtypes aren't supposed to be specializations of the Comparable concept, they're suppose to become Comparable (and make this property an integral part of their being). This is not a specialization/generalization relationship. Instead the supertype is intended to add character to the subtypes. The subtypes are unlikely to benefit from an inherited implementation. So make Comparable an interface.

Message splitting-- Queue stopped when no message created for one interface

Hi all,
I think you saw one post regarding this issue in SDN, but I can't find the post any more.
So, I have message splitting (it's multiple mappings to map one outbound msg to multip inbound msgs, not one mapping to map 1 to n. This is because of our own reason, but should not affect the analysis of the issue) to split one message to multiple. It works fine if the outbound message contains data for every inbound interface. However if the outbound message does NOT contain data for any one inbound message, there is an error in MONI and all subsequently splitted messages will not be passed in IE. The error in MONI says Split mapping created no messages, and Queue status turns to be Queue Stopped, and thus all the subsequently splitted messages are stuck in the queue.
Why this? and how to solve this problem?
Thanks
Jayson

>
Jayson wrote:
> Hi all,
>
> I think you saw one post regarding this issue in SDN, but I can't find the post any more.
>
> So, I have message splitting (it's multiple mappings to map one outbound msg to multip inbound msgs, not one mapping to map 1 to n. This is because of our own reason, but should not affect the analysis of the issue) to split one message to multiple. It works fine if the outbound message contains data for every inbound interface. However if the outbound message does NOT contain data for any one inbound message, there is an error in MONI and all subsequently splitted messages will not be passed in IE. The error in MONI says Split mapping created no messages, and Queue status turns to be Queue Stopped, and thus all the subsequently splitted messages are stuck in the queue.
>
> Why this? and how to solve this problem?
>
> Thanks
> Jayson
Hi Jyson,
what i analyse from this is you may be using different maapings and different inbound interfaces
but your receiver is the same and hence you are using only one interface determination with all the interface mappings specified there...
if this is the case..i suggest you remove the "maintain order at runtime "
tick in that interface detemination and it will surely work
giving points is another way to say thanks
Edited by: Tarang Shah on Mar 20, 2009 7:18 PM

When we will go for Ectended Interface Determination

extended interface determination example give me any one...
Regards,
Vinay

Enhanced (Mapping-Based) Interface Determination
Use
In an enhanced interface determination, you do not enter the inbound interfaces manually, but first select a multi-mapping. You get the inbound interfaces from the target interfaces of the multi-mapping. The inbound interfaces are determined at runtime during the mapping step.
You typically use an enhanced interface determination if the source message has an element with occurrence 0 ... unbounded (for multiple items of a data record) and you want multiple messages (for the individual items) to be generated at runtime.
For example, you want to split an overall booking for a trip comprising connecting flights into individual booking orders (for each leg of the trip).
You cannot realize this usage case with a standard interface determination (without using an integration process). A standard interface determination does allow you to specify multiple (N) inbound interfaces (with different mapping). In this case, N messages with the same payload and different receiver interfaces are generated from the source message before the mapping step; these are then transformed differently depending on the receiver interface. Therefore it is conceivable to write the mappings in such a way that the first mapping from the source message generates a message that only contains the first item, the second mapping generates a messages that only contains the second item, and so on. However, this no longer works if the number of items can vary with each new source message.
You can use an enhanced interface determination to configure a mapping-based message split for this usage case. You assign the interface determination a multi-mapping that has a target interface with an element with occurrence 0...unbounded. At runtime, the individual messages (for the individual items) are calculated in the mapping step. First, the individual messages are grouped into a bulk message. Then, the bulk message is transferred to the Adapter Engine. The Adapter Engine then splits the bulk message up into the individual messages (see figure).
Procedure at Runtime During Message Split
Note that both the bulk message and all individual messages each have a message header with a receiver interface (see figure).
Receiver Interfaces of Bulk Messages and Individual Messages
The header of the individual messages contains the relevant receiver interface. It is based on the definition of the multi-mapping. Note that the receiver interfaces of the individual messages may be different. The receiver interface of the bulk message is always InterfaceCollection (namespace http://sap.com/xi/XI/System).
If the message split only results in one message, the original message structure remains the same. In this case, a bulk message containing just one individual message is not created.
You can also assign a multi-mapping with multiple different target interfaces to an enhanced interface determination (1:n transformation). Each target interface can contain elements with occurrence 0 ... unbounded.
Messages cannot be sent by using different Adapter Engines in a mapping-based message split. This affects configuration thus: All receiver agreements that have a receiver interface from the mapping entered in the key must only be assigned communication channels with the following adapter types:
-          RFC adapter
-          SAP Business Connector adapter
-          File/FTP adapter
-          JDBC adapter
-          JMS adapter
-          SOAP adapter
-          Marketplace adapter
-          Mail adapter
-          RNIF adapter
-          CIDX adapter
The adapters also have to all run on the same Adapter Engine.
Adapters developed by partners also support a mapping-based message split if they run on the same Adapter Engine.
Attachments from the original message are not appended to the messages resulting from the message split.
Activities
To execute a mapping-based message split, perform the following steps:
       1.      Integration Repository: Define the multi-mapping (see Developing Multi-Mappings for Message Splits).
       2.      Integration Directory: Define the interface determination.
Note the following:
○     The outbound interface of the multi-mapping must be entered as the sender interface in the key of the interface determination.
○     The interface determination type must be set to Enhanced.
○     Select the multi-mapping you defined previously from the Integration Repository.
To select the interface mapping, use the input help ( ).
The target interfaces of the interface mapping are displayed in the Inbound Interfaces frame.
The number of messages (for an inbound interface) created in the mapping step is displayed in the Occurrence column.
regards,
Raj

When should SELECT ..FOR UPDATE be used?

DB Version:10gR2
This is what 10gR2 PL/SQL documentation says about SELECT...FOR UPDATE
With the SELECT FOR UPDATE statement, you can explicitly lock specific rows of a
table to make sure they do not change after you have read them. That way, you
can check which or how many rows will be affected by an UPDATE or DELETE
statement before issuing the statement, and no other application can change the
rows in the meantime
But i don't see SELECT...FOR UPDATE much in our production codes. Is SELECT ..FOR UPDATE used when huge amount of rows need to be updated?

Its maily used for locking table with differnt node , commely this concpet where used in
ERP products, bcoz different user can acces same table at time and do some DML
operation, using FOR UPDATE will protected ,
before that read this
hb venki

When should I ask for CLI?

I have two Cap ones, I guess they were both the step program. Ive had the first one 2.5 yrs. Its limit is 2k and its been close to maxed out for awhile. I usually pay a few hundred a month and use again, not paying attention to statement cut dates. I finally got into position and PIF last month and intend to PIF from now on. My second Capital one is quicksilver MC. Ive only had it 6 months and go my first increase from 1000-3000 without asking. Just curious about the first card. Should I wait a bit to let them see im PIF now? What about second card? Ill be using that one more because its my only reward one. I tried walmart, they said no. Ive had it 2.5 yrs, its been late but not 30 days. Limits 500. Thanks Tara

baseballmom44 wrote:
I have two Cap ones, I guess they were both the step program. Ive had the first one 2.5 yrs. Its limit is 2k and its been close to maxed out for awhile. I usually pay a few hundred a month and use again, not paying attention to statement cut dates. I finally got into position and PIF last month and intend to PIF from now on. My second Capital one is quicksilver MC. Ive only had it 6 months and go my first increase from 1000-3000 without asking. Just curious about the first card. Should I wait a bit to let them see im PIF now? What about second card? Ill be using that one more because its my only reward one. I tried walmart, they said no. Ive had it 2.5 yrs, its been late but not 30 days. Limits 500. Thanks TaraI have tried their luv buttom almost everyday to no avail and now i know with my accounts it only works every six months. Even tried the EO and did not go through. So you might be different and get it now via luv or calling. Every person here has had different experiences so really just try now and find out lol

When to use webdynpro for developing reports instead of ABAP Editor in R/3

Hello Frends,
I am new to Webdynpro ABAP. I just wanted to know when we should used webdnpro ABAP for developing reports, instead of using ABAP Editor in R/3. If you can give me the details it will be helpful.
Thanks,
Regards.

Hi navnetha,
As mishbah told you , that there is no hard and fast rule for reporting throught webdynpro.It all depends on client requirement .Now if you want to develope alll the reports by using webdynpro without your clients request , then you need to explain the advantages of webdynpro reporting above abap reporting.
for e.g. Webdynpro reports can run on browser, They can be posted on portal, Easy handling and maintenance and reusability.
Other than this i guess if you can show some business profit to the client, then i think every client would like to go for webdynpro reporting.
regards
PG

When do you go for classifical infoset and when for infosets?

hi all,
Can anyone tell me when shall we go for creating classical infosets and when shall we opt for infosets. explain me with an real time scenario.
And can u tell me the steps invovled in creating classical infosets and creating infosets.
thanxs in advance
regds
hari

Hi,
infosets are nothing but...it is a link between info objects and data targets(ods,cube)...if we do these link between them only....we can get the report in BEX analyzer...where use the infoset name to get reports...same llike ...to get the report....we can use multiprovider also...but in infoset.. link being the common datas(link between the common primary dats)...in multiprovider...can view all datas in report..there is no links between common datas....here ods is overritable..
further queries...go through this links......
http://help.sap.com/saphelp_nw04s/helpdata/en/e3/e60138fede083de10000009b38f8cf/frameset.htm
SAP® BW: A Step-by-Step Guide
http://safari.oreilly.com/0201703661/pref01
Check these,
https://www.sdn.sap.com:443/irj/sdn/thread?threadid=163772&messageid=1837694
https://www.sdn.sap.com:443/irj/sdn/thread?threadid=199410&messageid=2217326
https://www.sdn.sap.com:443/irj/sdn/thread?threadid=189150&messageid=2113030
http://help.sap.com/saphelp_erp2005vp/helpdata/en/d2/cb43b2455611d189710000e8322d00/frameset.htm
Thank you
DST

Should i go for 16gb or 32 gb

HI
i am planning to buy Iphone 4s.. bit confuse , should i opt for 16 gb or 32 gb, i love taking snaps. and video and i play average games...but love watching video...while traveling..
kindly advice...
regards
Ashish

Most apps tend not to take up too much space, though some games can be quite large - what can up a lot of space are films/tv shows and your music. You will have less than the 16 or 32 gig available to you for your content, some is taken up by iOS and the built-in apps e.g. on my 32 gig 4S I have 28.2 gig available to me - personally I'd say that the 32 gig version would be better, especially if you want to have films on it and/or a fair amount of music.

Lookup for local interfaces.

Isn't lookup for local interfaces allowed from web client. I have defined a
ejb-reference for the bean in my web.xml. When I do a lookup as
TestBeanLocalHome home = (TestBeanLocalHome)
ic.lookup("java:comp/env/ejb/TestBeanLocal");
This statement result in an error
javax.naming.NameNotFoundException: Unable to resolve
comp/env/ejb/TestSLSBeanLocal/ Resolved: 'comp/env/ejb'
Unresolved:'TestBeanLocal' ; remaining name ''
at
weblogic.jndi.internal.BasicNamingNode.newNameNotFoundException(BasicNamingN
ode.java:887)
at
weblogic.jndi.internal.BasicNamingNode.lookupHere(BasicNamingNode.java:219)
at weblogic.jndi.internal.BasicNamingNode.lookup(BasicNamingNode.java:183)
at weblogic.jndi.internal.BasicNamingNode.lookup(BasicNamingNode.java:191)
at weblogic.jndi.internal.BasicNamingNode.lookup(BasicNamingNode.java:191)
at weblogic.jndi.internal.BasicNamingNode.lookup(BasicNamingNode.java:191)
at weblogic.jndi.internal.WLContextImpl.lookup(WLContextImpl.java:339)
at
weblogic.jndi.factories.java.ReadOnlyContextWrapper.lookup(ReadOnlyContextWr
apper.java:36)
at
weblogic.jndi.internal.AbstractURLContext.lookup(AbstractURLContext.java:124
at javax.naming.InitialContext.lookup(InitialContext.java:345)
at jsp_servlet.__client._jspService(__client.java:108)
at weblogic.servlet.jsp.JspBase.service(JspBase.java:27)
at
weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
:265)
at
weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
:200)
at
weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletCo
ntext.java:2495)
at
weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java
:2204)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:139)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)
The same thing works when lookup is done for remote interface.
Regards,
Rupesh.

You need to use "ejb-local-ref" to refer to local interfaces. I meant
"ejb-local-ref" element was not available in web.xml in Servlet 2.2. They
were added in Servlet 2.3 specification. So unless your app server is
Servlet 2.3 compliant it does not need to support references to local
interfaces in web components (servlets or jsps). Weblogic 6.1 did not seem
to support them last time I tried.
-- Anand
"Rupesh" <[email protected]> wrote in message
news:[email protected]...
what do u mean by local interface in web component? its ejb's local
interfaces and lookups are any way being
done using ejb-ref and ref mapping are given in weblogic.xml.
Where does Servlet spec come into the picture?
Do you mean to say that you can not lookup for local home from a jsp in
WL6.1?
Regards,
Rupesh.
Anand Byrappagari <[email protected]> wrote in message
news:[email protected]...
Are you using Weblogic 6.1? Then local interfaces in web components arenot
supported. Local interfaces were added only in Servlet 2.3 I think.Weblogic
6.1 is not completely compliant with Servlet 2.3.
-- Anand
"Rupesh" <[email protected]> wrote in message
news:[email protected]...
Isn't lookup for local interfaces allowed from web client. I have
defined
a
ejb-reference for the bean in my web.xml. When I do a lookup as
TestBeanLocalHome home = (TestBeanLocalHome)
ic.lookup("java:comp/env/ejb/TestBeanLocal");
This statement result in an error
javax.naming.NameNotFoundException: Unable to resolve
comp/env/ejb/TestSLSBeanLocal/ Resolved: 'comp/env/ejb'
Unresolved:'TestBeanLocal' ; remaining name ''
at
weblogic.jndi.internal.BasicNamingNode.newNameNotFoundException(BasicNamingN
ode.java:887)
at
weblogic.jndi.internal.BasicNamingNode.lookupHere(BasicNamingNode.java:219)
atweblogic.jndi.internal.BasicNamingNode.lookup(BasicNamingNode.java:183)
atweblogic.jndi.internal.BasicNamingNode.lookup(BasicNamingNode.java:191)
atweblogic.jndi.internal.BasicNamingNode.lookup(BasicNamingNode.java:191)
atweblogic.jndi.internal.BasicNamingNode.lookup(BasicNamingNode.java:191)
atweblogic.jndi.internal.WLContextImpl.lookup(WLContextImpl.java:339)
at
weblogic.jndi.factories.java.ReadOnlyContextWrapper.lookup(ReadOnlyContextWr
apper.java:36)
at
weblogic.jndi.internal.AbstractURLContext.lookup(AbstractURLContext.java:124
at javax.naming.InitialContext.lookup(InitialContext.java:345)
at jsp_servlet.__client._jspService(__client.java:108)
at weblogic.servlet.jsp.JspBase.service(JspBase.java:27)
at
weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
:265)
at
weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
:200)
at
weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletCo
ntext.java:2495)
at
weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java
:2204)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:139)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)
The same thing works when lookup is done for remote interface.
Regards,
Rupesh.

Guidelines for designing interfaces

Hi,
We are in the process of implementing SAP. Are there any guidelines while designing interfaces, when one should one design an interface where data transfer in an interface is done
1) using ALE-Idocs,
2) when should data be transffered using flat file and
3) when should we have an EDI interface?
Thanks,
Peter

@Hareesh
Please do not Copy & Paste the Content

What external hdd bus should I use for FCP 7?

Howdy! My colleague and I are editing a film in FCP 7, and media handling has become somewhat, complicated, shall we say. So we decided that we're both going to buy external hard drives, and keep them in synch using something like Super Duper, or Carbon Copy Cloner. I've been doing some research, but I'm still unsure as to what connection I should use? We're both using MacBook Pro's with firewire 800 ports, and USB 2.0 ports (No thunderbolt). Since these drives are going to be used exclusivly for video and audio, how fast of a connection should we have so that the connection doesn't cause a bottle neck? I know that Sata III can do up to 6.0 Gb/s, but I also know that a hard drive can't utilize that much bandwidth. So will USB 2.0 slow it down, or would it be fast enough? Or should I opt for firewire 800?
This is the hard drive I'm looking at getting, and I'll put it in an external encloser:
http://http://www.newegg.com/Product/Product.aspx?Item=N82E16822145475&nm_mc=EMC -IGNEFL082611&cm_mmc=EMC-IGNEFL082611-_-EMC-082611-Index-_-InternalHardDrives-_- 22145475-L0B
Thanks!
Paul
P.S. is 5200rpm's enough, or should I get 7200rpm?

If you plan to use the drive for editing/rendering media files, you'll need a 7200rpm drive and a Firewire or eSATA connection.
If you're only using the drive for backup purposes or general data storage, USB and 5400rpm will work.
-DH

When should i opt for an interface in OOPs ABAP?

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