@Override
public Object visitPrepareCommand(TxInvocationContext ctx, PrepareCommand command)
throws Throwable {
GMUPrepareCommand spc = convert(command, GMUPrepareCommand.class);
if (ctx.isOriginLocal()) {
spc.setVersion(ctx.getTransactionVersion());
spc.setReadSet(ctx.getReadSet());
} else {
ctx.setTransactionVersion(spc.getPrepareVersion());
}
wrapEntriesForPrepare(ctx, command);
performValidation(ctx, spc);
Object retVal = invokeNextInterceptor(ctx, command);
if (ctx.isOriginLocal() && command.getModifications().length > 0) {
EntryVersion commitVersion =
calculateCommitVersion(
ctx.getTransactionVersion(),
versionGenerator,
cll.getWriteOwners(ctx.getCacheTransaction()));
ctx.setTransactionVersion(commitVersion);
} else {
retVal = ctx.getTransactionVersion();
}
if (command.isOnePhaseCommit()) {
commitContextEntries.commitContextEntries(ctx);
}
return retVal;
}
@Override
protected void afterWriteLocksAcquired(TxInvocationContext ctx, PrepareCommand command)
throws InterruptedException {
GMUPrepareCommand spc = GMUHelper.convert(command, GMUPrepareCommand.class);
Object[] readSet = spc.getReadSet();
TimSort.sort(readSet, keyComparator);
acquireReadLocks(ctx, readSet);
}
/**
* validates the read set and returns the prepare version from the commit queue
*
* @param ctx the context
* @param command the prepare command
* @throws InterruptedException if interrupted
*/
protected void performValidation(TxInvocationContext ctx, GMUPrepareCommand command)
throws InterruptedException {
boolean hasToUpdateLocalKeys = hasLocalKeysToUpdate(command.getModifications());
boolean isReadOnly = command.getModifications().length == 0;
if (!isReadOnly) {
cll.performReadSetValidation(ctx, command);
if (hasToUpdateLocalKeys) {
transactionCommitManager.prepareTransaction(ctx.getCacheTransaction());
} else {
transactionCommitManager.prepareReadOnlyTransaction(ctx.getCacheTransaction());
}
}
if (log.isDebugEnabled()) {
log.debugf(
"Transaction %s can commit on this node. Prepare Version is %s",
command.getGlobalTransaction().prettyPrint(), ctx.getTransactionVersion());
}
}
