private Transaction getCurrentTransaction() throws SystemException {
Transaction transaction = transactionManagerLookup.getTransactionManager().getTransaction();
if (transaction == null) {
throw new TransactionException("JTA transaction not started");
}
return transaction;
}
/**
* Constructor
*
* @param transactionManagerLookup the transaction manager lookup implementation
* @param softLockManager the soft lock manager
* @param transactionIdFactory the transaction ID factory
* @param cache the cache
* @param store the underlying store
* @param copyStrategy the original copy strategy
*/
public XATransactionStore(
TransactionManagerLookup transactionManagerLookup,
SoftLockManager softLockManager,
TransactionIDFactory transactionIdFactory,
Ehcache cache,
Store store,
ReadWriteCopyStrategy<Element> copyStrategy) {
super(store, copyStrategy);
this.transactionManagerLookup = transactionManagerLookup;
this.transactionIdFactory = transactionIdFactory;
if (transactionManagerLookup.getTransactionManager() == null) {
throw new TransactionException(
"no JTA transaction manager could be located, cannot bind twopc cache with JTA");
}
this.softLockManager = softLockManager;
this.cache = cache;
// this xaresource is for initial registration and recovery
this.recoveryResource =
new EhcacheXAResourceImpl(
cache,
underlyingStore,
transactionManagerLookup,
softLockManager,
transactionIdFactory,
copyStrategy,
commitObserver,
rollbackObserver,
recoveryObserver);
transactionManagerLookup.register(recoveryResource, true);
}
/** {@inheritDoc} */
public int getTerracottaClusteredSize() {
try {
Transaction transaction = transactionManagerLookup.getTransactionManager().getTransaction();
if (transaction == null) {
return underlyingStore.getTerracottaClusteredSize();
}
} catch (SystemException se) {
throw new TransactionException("cannot get the current transaction", se);
}
LOG.debug("cache {} getTerracottaClusteredSize", cache.getName());
XATransactionContext context = getOrCreateTransactionContext();
int size = underlyingStore.getTerracottaClusteredSize();
return size + context.getSizeModifier();
}