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B&S locking solution - consumes no CPU cycles

Pepe Luca
Greenhorn

Joined: Feb 06, 2007
Posts: 1
Hi,

I have the B&S project. I implemented the LockManager for this project and I wanted to solve the problem of a thread that must consume no CPU cycles after it tries to lock a resource that has been locked by another client. I thought that it is more important to meet this requirement than the code simplicity (another requirement . I read some other posts with this problem but there was no code posted.

My solution includes 2 HashMaps
1.cookieMap - Used for maintaining the locked records key - recordNumber, value - cookie returned when the record has been locked
2.recordLocks - Used for keeping locks for each record that has been locked.
The LockManager is used as a member in the Data class which is also responsible for detecting if a record for which a client waits to lock was updated/deleted until it acquires the lock.

Please take a look and advise me
Daniel Travin
Greenhorn

Joined: Oct 19, 2007
Posts: 7
Hello Pepe,

it would be much more easier to understand your idea if you provide the code of yoru LockManager as well

Daniel.
 
It is sorta covered in the JavaRanch Style Guide.
 
subject: B&S locking solution - consumes no CPU cycles