Examples of oracle.toplink.essentials.internal.helper.ConcurrencyManager

Package oracle.toplink.essentials.internal.helper

Examples of oracle.toplink.essentials.internal.helper.ConcurrencyManager

oracle.toplink.essentials.internal.helper.ConcurrencyManager
INTERNAL:
Purpose: To maintain concurrency for a paticular task. It is a wrappers of a semaphore that allows recursive waits by a single thread.
Responsibilities:
- Keep track of the active thread.
- Wait all other threads until the first thread is done.
- Maintain the depth of the active thread.

    protected Hashtable getLocks() {
        return locks;
    }


    protected void acquireLock(String seqName) {
        ConcurrencyManager manager;
        synchronized (getLocks()) {
            manager = (ConcurrencyManager)getLocks().get(seqName);
            if (manager == null) {
                manager = new ConcurrencyManager();
                getLocks().put(seqName, manager);
            }
        }
        manager.acquire();
    }

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        }
        manager.acquire();
    }


    protected void releaseLock(String seqName) {
        ConcurrencyManager manager = (ConcurrencyManager)locks.get(seqName);
        manager.release();
    }

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     * The transaction mutex ensure mutual exclusion on transaction across multiple threads.
     */
    public synchronized ConcurrencyManager getTransactionMutex() {
        // PERF: not always required, defer.
        if (transactionMutex == null) {
            transactionMutex = new ConcurrencyManager();
        }
        return transactionMutex;
    }

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Related Classes of oracle.toplink.essentials.internal.helper.ConcurrencyManager

oracle.toplink.essentials.internal.sequencing.SequencingManager

oracle.toplink.essentials.internal.sessions.AbstractSession

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