private void registerRemoteTransaction(GlobalTransaction gtx, RemoteTransaction rtx) {
RemoteTransaction transaction = remoteTransactions.put(gtx, rtx);
if (transaction != null) {
log.remoteTxAlreadyRegistered();
throw new IllegalStateException(
"A remote transaction with the given id was already registered!!!");
}
log.tracef("Created and registered remote transaction %s", rtx);
if (rtx.getTopologyId() < minTxTopologyId) {
log.tracef(
"Changing minimum topology ID from %d to %d", minTxTopologyId, rtx.getTopologyId());
minTxTopologyId = rtx.getTopologyId();
}
}
private RemoteTransaction getOrCreateRemoteTransaction(
GlobalTransaction globalTx, WriteCommand[] modifications, int topologyId) {
RemoteTransaction remoteTransaction = remoteTransactions.get(globalTx);
if (remoteTransaction != null) return remoteTransaction;
remoteTransaction =
modifications == null
? txFactory.newRemoteTransaction(globalTx, topologyId)
: txFactory.newRemoteTransaction(modifications, globalTx, topologyId);
RemoteTransaction existing = remoteTransactions.putIfAbsent(globalTx, remoteTransaction);
if (existing != null) {
log.tracef("Remote transaction already registered: %s", existing);
return existing;
} else {
log.tracef("Created and registered remote transaction %s", remoteTransaction);
if (remoteTransaction.getTopologyId() < minTxTopologyId) {
log.tracef(
"Changing minimum topology ID from %d to %d",
minTxTopologyId, remoteTransaction.getTopologyId());
minTxTopologyId = remoteTransaction.getTopologyId();
}
return remoteTransaction;
}
}
public void cleanupStaleTransactions(CacheTopology cacheTopology) {
int topologyId = cacheTopology.getTopologyId();
List<Address> members = cacheTopology.getMembers();
// We only care about transactions originated before this topology update
if (getMinTopologyId() >= topologyId) return;
log.tracef(
"Checking for transactions originated on leavers. Current members are %s, remote transactions: %d",
members, remoteTransactions.size());
Set<GlobalTransaction> toKill = new HashSet<GlobalTransaction>();
for (Map.Entry<GlobalTransaction, RemoteTransaction> e : remoteTransactions.entrySet()) {
GlobalTransaction gt = e.getKey();
RemoteTransaction remoteTx = e.getValue();
log.tracef("Checking transaction %s", gt);
// The topology id check is needed for joiners
if (remoteTx.getTopologyId() < topologyId && !members.contains(gt.getAddress())) {
toKill.add(gt);
}
}
if (toKill.isEmpty()) {
log.tracef("No global transactions pertain to originator(s) who have left the cluster.");
} else {
log.tracef("%s global transactions pertain to leavers and need to be killed", toKill.size());
}
for (GlobalTransaction gtx : toKill) {
log.tracef("Killing remote transaction originating on leaver %s", gtx);
RollbackCommand rc = new RollbackCommand(cacheName, gtx);
rc.init(invoker, icc, TransactionTable.this);
try {
rc.perform(null);
log.tracef("Rollback of transaction %s complete.", gtx);
} catch (Throwable e) {
log.unableToRollbackGlobalTx(gtx, e);
}
}
log.tracef(
"Completed cleaning transactions originating on leavers. Remote transactions remaining: %d",
remoteTransactions.size());
}