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Language:
English
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Language:
English
9.4.5. Implicit Pessimistic Locking Example
An example of implicit pessimistic locking using a transaction that runs on one of the cache nodes is as follows:
tx.begin() cache.put(K,V) cache.put(K2,V2) cache.put(K,V5) tx.commit()
- When the line
cache.put(K,V)
executes, a cluster-wide lock is acquired onK
. - When the line
cache.put(K2,V2)
executes, a cluster-wide lock is acquired onK2
. - When the line
cache.put(K,V5)
executes, the lock acquisition is non operational because a cluster-wide lock forK
has been previously acquired. Theput
operation will still occur. - When the line
tx.commit()
executes, all locks held for this transaction are released.