/**
* Do the commit. This is the 2nd phase of the 2-phase protocol.
*
* @param transactionState
* @throws CommitUnsuccessfulException
*/
void doCommit(final TransactionState transactionState) throws CommitUnsuccessfulException {
try {
LOG.trace("Commiting [" + transactionState.getTransactionId() + "]");
transactionLogger.setStatusForTransaction(
transactionState.getTransactionId(), TransactionLogger.TransactionStatus.COMMITTED);
for (HRegionLocation location : transactionState.getParticipatingRegions()) {
if (transactionState.getRegionsToIngore().contains(location)) {
continue;
}
TransactionalRegionInterface transactionalRegionServer =
(TransactionalRegionInterface)
connection.getHRegionConnection(location.getServerAddress());
transactionalRegionServer.commit(
location.getRegionInfo().getRegionName(), transactionState.getTransactionId());
}
} catch (Exception e) {
LOG.info(
"Commit of transaction [" + transactionState.getTransactionId() + "] was unsucsessful",
e);
// This happens on a NSRE that is triggered by a split
try {
abort(transactionState);
} catch (Exception abortException) {
LOG.warn("Exeption durring abort", abortException);
}
throw new CommitUnsuccessfulException(e);
}
transactionLogger.forgetTransaction(transactionState.getTransactionId());
}
/**
* Abort a s transaction.
*
* @param transactionState
* @throws IOException
*/
public void abort(final TransactionState transactionState) throws IOException {
transactionLogger.setStatusForTransaction(
transactionState.getTransactionId(), TransactionLogger.TransactionStatus.ABORTED);
for (HRegionLocation location : transactionState.getParticipatingRegions()) {
if (transactionState.getRegionsToIngore().contains(location)) {
continue;
}
try {
TransactionalRegionInterface transactionalRegionServer =
(TransactionalRegionInterface)
connection.getHRegionConnection(location.getServerAddress());
transactionalRegionServer.abortTransaction(
location.getRegionInfo().getRegionName(), transactionState.getTransactionId());
} catch (UnknownTransactionException e) {
LOG.info(
"Got unknown transaciton exception durring abort. Transaction: ["
+ transactionState.getTransactionId()
+ "], region: ["
+ location.getRegionInfo().getRegionNameAsString()
+ "]. Ignoring.");
} catch (NotServingRegionException e) {
LOG.info(
"Got NSRE durring abort. Transaction: ["
+ transactionState.getTransactionId()
+ "], region: ["
+ location.getRegionInfo().getRegionNameAsString()
+ "]. Ignoring.");
}
}
transactionLogger.forgetTransaction(transactionState.getTransactionId());
}
/**
* Try and commit a transaction. This does both phases of the 2-phase protocol: prepare and
* commit.
*
* @param transactionState
* @throws IOException
* @throws CommitUnsuccessfulException
*/
public void tryCommit(final TransactionState transactionState)
throws CommitUnsuccessfulException, IOException {
long startTime = EnvironmentEdgeManager.currentTimeMillis();
LOG.trace("atempting to commit trasaction: " + transactionState.toString());
int status = prepareCommit(transactionState);
if (status == TransactionalRegionInterface.COMMIT_OK) {
doCommit(transactionState);
} else if (status == TransactionalRegionInterface.COMMIT_OK_READ_ONLY) {
transactionLogger.forgetTransaction(transactionState.getTransactionId());
} else if (status == TransactionalRegionInterface.COMMIT_UNSUCESSFUL) {
// We have already aborted at this point
throw new CommitUnsuccessfulException();
}
LOG.trace(
"Committed transaction ["
+ transactionState.getTransactionId()
+ "] in ["
+ ((EnvironmentEdgeManager.currentTimeMillis() - startTime))
+ "]ms");
}
/**
* Called to start a transaction.
*
* @return new transaction state
*/
public TransactionState beginTransaction() {
long transactionId = transactionLogger.createNewTransactionLog();
LOG.debug("Begining transaction " + transactionId);
return new TransactionState(transactionId);
}
