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Lock a Portal User to avoid parallel modification in WebDynpro Java

Greetings experts

I'm building a application to manage portal users in WebDynpro Java.

I need to lock a portal user; for example "dmaldonado"; in order to avoid parallel modifications. I don't know how

Please help me

Former Member
Former Member replied

Hello,

Maybe you should take a look at this:

https://cw.sdn.sap.com/cw/docs/DOC-19144

Basically, you should define a namespace for that and an Object Name. (IE: namespace: 'com.yourcompany.useradmin' object: 'userRoles')

The implementation could follow some simple steps, also described and exemplified in the URL.

1. Lookup the Service using JNDI;

2. Create a LogicalLocking Instance; (use the LogicalLockingFactory)

3. As soon a session goes "Edit" (IE: the user clicked Edit button to acquire a lock) you perform a LogicalLocking.lock() for the ObjectName you defined;

- When trying to acquire a Lock you may have to catch and treat an Exception (LockException) and display some Warning to the user (The Object is Locked);

- I reckon you can use LogicalLocking.getCurrentOwner after on your catch block to get the user;

- Use the UME API to collect any additional information you need.

4. As soon a session "Save", you perform the LogicalLocking.unlock() for the ObjectName you defined;

JavaDocs:

http://help.sap.com/javadocs/nw04/current/en/com/sap/engine/services/applocking/LogicalLockingFactory.html

http://help.sap.com/javadocs/nw04/current/en/com/sap/engine/services/applocking/LogicalLocking.html

Hope it helps,

Daniel

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