Give me some ideas for the project.

Hi,folks
I am not familiar with programming in web services. Now i have a project related to web services need to finish. I want to someone give me some ideas for the project. how can i implement the access control services. is there anyone can give me some related links for me to learn.
Project Title: Implementing an access control service
Project Description:
Web services are emerging as a new approach to system construction and will make a major impact on the engineering of future business systems. They will allow a move from enterprise to inter-enterprise computing. However, with inter-enterprise computing, there are major problems with providing access to shared data, given that enterprises will not wish to share all data with partners.
This project aims to investigate this problem by developing a prototype of an access control service that will help decide whether or not data access should be permitted. In essence, companies will outsource their access control to this service and so will not need to maintain their own access control lists for a potentially rapidly changing set of users.
Suggested Platform: Windows or Linux
Suggested Languages & Tools: Java

Well, the approach I've come accross is a central server which is typically accessed indirectly from the web servers (e.g. through SOAP protocol or RMI).
The remote server sends a user id and a password (or more likely a digest of the password), and receives a session token, basically just a random string of characters which is checked with the central server each time a secure transaction is attempted. The token will be stored in a session object, or perhaps directly in a cookie or in the URLs.
Active session tokens are stored on the central server for comparison. This means the password doesn't have to be retained in the server.
It's possible for the session token to be transfered if the user switches from one site to another on the same authentication server.
Sun distributes one of these beasties, by the way, so you could take a look at their product specs.

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hi.
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i am using tables to give the output depending on the date.
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delete adjacent duplicates from it_vakpa.
sort it_knb1 by kunnr.
loop at it_knb1.
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Hi,
while looping don't delete the entries from the internal table on which you are looping.
take one more vairable(flag(1) type c) in internal table structure it_knb1.
after read statement
if sy-subrc <> 0.
 it_knb1-flag = 'X'.
 modify it_knb1 transporting flag.
endif.
after endloop, write the delete statement on it_knb1.
delete table it_knb1 where flag = 'X'.
this is the best approach.
Reward if useful.
Thanks,
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Hi,
can anyone give me some documents for data cluster?
ths!
regards!

Hi ,
The following is a documentation on the Data Cluster:
Data clusters are specific to ABAP. Although it is possible to read a cluster database using SQL statements, only ABAP can interpret the structure of the data cluster.
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Cluster Databases ( I have explained the cluster databse below )
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Cluster Database :
 Cluster databases are special relational databases in the ABAP Dictionary that you can use to store data clusters. Their line structure is divided into a standard section, containing several fields, and one large field for the data cluster.
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Syntax
IMPORT DIRECTORY INTO <dirtab>
 FROM DATABASE <dbtab>(<ar>)
 [CLIENT <cli>] ID <key>.
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******** Sample Program illustrating the data cluster .
PROGRAM Zdata_cluster.
TABLES INDX.
******to save data objects in cluster databases
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 COL1 TYPE I,
 COL2 TYPE I,
 END OF ITAB.
DO 3000 TIMES.
ITAB-COL1 = SY-INDEX.
ITAB-COL2 = SY-INDEX ** 2.
APPEND ITAB.
ENDDO.
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INDX-PGMID = SY-REPID.
EXPORT ITAB TO DATABASE INDX(HK) ID 'Table'.
WRITE: ' SRTF2',
 AT 20 'AEDAT',
 AT 35 'USERA',
 AT 50 'PGMID'.
ULINE.
SELECT * FROM INDX WHERE RELID = 'HK'
 AND SRTFD = 'Table'.
WRITE: / INDX-SRTF2 UNDER 'SRTF2',
 INDX-AEDAT UNDER 'AEDAT',
 INDX-USERA UNDER 'USERA',
 INDX-PGMID UNDER 'PGMID'.
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****To create a directory of a data cluster from an ABAP ****cluster database
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 INDX(HK) ID 'Table'.
IF SY-SUBRC = 0.
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 / 'USERA:', INDX-USERA,
 / 'PGMID:', INDX-PGMID.
WRITE / 'Directory:'.
LOOP AT DIRTAB.
 WRITE: / DIRTAB-NAME, DIRTAB-OTYPE, DIRTAB-FTYPE,
 DIRTAB-TFILL, DIRTAB-FLENG.
ENDLOOP.
ELSE.
WRITE 'Not found'.
ENDIF.
*******run this program and see the result.
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if useful, do reward with the points.
Regards,
Kunal.

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Thanks!
Last edited by khs (2011-08-24 08:55:31)

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