@TopologyChanged
@SuppressWarnings("unused")
public void onTopologyChange(TopologyChangedEvent<?, ?> tce) {
// don't do anything if this cache is not clustered
if (clustered) {
if (tce.isPre()) {
currentTopologyId = tce.getNewTopologyId();
} else {
log.debugf("Topology changed, recalculating minTopologyId");
calculateMinTopologyId(-1);
}
}
}
protected final void recalculateMinTopologyIdIfNeeded(CacheTransaction removedTransaction) {
if (removedTransaction == null)
throw new IllegalArgumentException("Transaction cannot be null!");
if (currentTopologyId != CACHE_STOPPED_TOPOLOGY_ID) {
// Assume that we only get here if we are clustered.
int removedTransactionTopologyId = removedTransaction.getTopologyId();
if (removedTransactionTopologyId < minTxTopologyId) {
log.tracef(
"A transaction has a topology ID (%s) that is smaller than the smallest transaction topology ID (%s) this node knows about! This can happen if a concurrent thread recalculates the minimum topology ID after the current transaction has been removed from the transaction table.",
removedTransactionTopologyId, minTxTopologyId);
} else if (removedTransactionTopologyId == minTxTopologyId
&& removedTransactionTopologyId < currentTopologyId) {
// We should only need to re-calculate the minimum topology ID if the transaction being
// completed
// has the same ID as the smallest known transaction ID, to check what the new smallest is,
// and this is
// not the current topology ID.
calculateMinTopologyId(removedTransactionTopologyId);
}
}
}
