/**
* 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());
}
public static void testBeginEndEmpty(int numtx) throws IOException, CommitUnsuccessfulException {
PrintWriter out = new PrintWriter(new File("TEmptyTest.txt"));
out.println("\nTransactionEmptyTest ENTRY");
double begin_latency = 0;
double end_latency = 0;
double abort_latency = 0;
int newValue = 0;
for (newValue = 0; newValue < numtx; newValue++) {
// Begin
long ts1 = System.nanoTime();
TransactionState transactionState = transactionManager.beginTransaction();
long ts2 = System.nanoTime();
long latency = ts2 - ts1;
double latency2 = (double) latency / 1000000000;
begin_latency = begin_latency + latency2;
// End
ts1 = System.nanoTime();
transactionManager.tryCommit(transactionState);
ts2 = System.nanoTime();
latency = ts2 - ts1;
latency2 = (double) latency / 1000000000;
end_latency = end_latency + latency2;
transactionState = transactionManager.beginTransaction();
// Abort
ts1 = System.nanoTime();
transactionManager.abort(transactionState);
ts2 = System.nanoTime();
latency = ts2 - ts1;
latency2 = (double) latency / 1000000000;
abort_latency = abort_latency + latency2;
}
out.println("\nAverage Begin latency : " + (double) (begin_latency / newValue));
out.println("Average End latency : " + (double) (end_latency / newValue));
out.println("Average Abort latency : " + (double) (abort_latency / newValue));
out.println("newValue : " + newValue);
out.println("\ntestGetAfterPut EXIT");
out.close();
}
/**
* Prepare to commit a transaction.
*
* @param transactionState
* @return commitStatusCode (see {@link TransactionalRegionInterface})
* @throws IOException
* @throws CommitUnsuccessfulException
*/
public int prepareCommit(final TransactionState transactionState)
throws CommitUnsuccessfulException, IOException {
boolean allReadOnly = true;
try {
for (HRegionLocation location : transactionState.getParticipatingRegions()) {
TransactionalRegionInterface transactionalRegionServer =
(TransactionalRegionInterface)
connection.getHRegionConnection(location.getServerAddress());
int commitStatus =
transactionalRegionServer.commitRequest(
location.getRegionInfo().getRegionName(), transactionState.getTransactionId());
boolean canCommit = true;
switch (commitStatus) {
case TransactionalRegionInterface.COMMIT_OK:
allReadOnly = false;
break;
case TransactionalRegionInterface.COMMIT_OK_READ_ONLY:
transactionState.addRegionToIgnore(location); // No need to doCommit for read-onlys
break;
case TransactionalRegionInterface.COMMIT_UNSUCESSFUL:
canCommit = false;
transactionState.addRegionToIgnore(location); // No need to re-abort.
break;
default:
throw new CommitUnsuccessfulException(
"Unexpected return code from prepareCommit: " + commitStatus);
}
if (LOG.isTraceEnabled()) {
LOG.trace(
"Region ["
+ location.getRegionInfo().getRegionNameAsString()
+ "] votes "
+ (canCommit ? "to commit" : "to abort")
+ " transaction "
+ transactionState.getTransactionId());
}
if (!canCommit) {
LOG.debug("Aborting [" + transactionState.getTransactionId() + "]");
abort(transactionState);
return TransactionalRegionInterface.COMMIT_UNSUCESSFUL;
}
}
} catch (Exception e) {
LOG.debug(
"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);
}
return allReadOnly
? TransactionalRegionInterface.COMMIT_OK_READ_ONLY
: TransactionalRegionInterface.COMMIT_OK;
}
public static void testGetAfterPut2(int numtx) throws IOException, CommitUnsuccessfulException {
PrintWriter out = new PrintWriter(new File("TWorkTest.txt"));
out.println("\nTransactionWithWorkTest ENTRY");
double begin_latency = 0;
double end_latency = 0;
double put_latency = 0;
double get_latency = 0;
double delete_latency = 0;
double abort_latency = 0;
int newValue = 0;
double hput_latency = 0;
double hget_latency = 0;
double hdelete_latency = 0;
for (newValue = 0; newValue < numtx; newValue++) {
// Begin
long ts1 = System.nanoTime();
TransactionState transactionState = transactionManager.beginTransaction();
long ts2 = System.nanoTime();
long latency = ts2 - ts1;
double latency2 = (double) latency / 1000000000;
begin_latency = begin_latency + latency2;
// Put
ts1 = System.nanoTime();
table.put(transactionState, new Put(ROW1).add(FAMILY, QUAL_A, Bytes.toBytes(newValue)));
ts2 = System.nanoTime();
latency = ts2 - ts1;
latency2 = (double) latency / 1000000000;
put_latency = put_latency + latency2;
// Abort
System.nanoTime();
transactionManager.abort(transactionState);
try {
transactionState.completeRequest();
} catch (Exception e) {
System.out.println("\nCAUGHT\n");
}
ts2 = System.nanoTime();
latency = ts2 - ts1;
latency2 = (double) latency / 1000000000;
abort_latency = abort_latency + latency2;
transactionState = transactionManager.beginTransaction();
table.put(transactionState, new Put(ROW1).add(FAMILY, QUAL_A, Bytes.toBytes(newValue)));
// End
ts1 = System.nanoTime();
transactionManager.tryCommit(transactionState);
try {
transactionState.completeRequest();
} catch (Exception e) {
System.out.println("\nCAUGHT\n");
}
ts2 = System.nanoTime();
latency = ts2 - ts1;
latency2 = (double) latency / 1000000000;
end_latency = end_latency + latency2;
transactionState = transactionManager.beginTransaction();
table.put(transactionState, new Put(ROW1).add(FAMILY, QUAL_A, Bytes.toBytes(newValue)));
// Get
ts1 = System.nanoTime();
Result row1_A = table.get(new Get(ROW1).addColumn(FAMILY, QUAL_A));
ts2 = System.nanoTime();
latency = ts2 - ts1;
latency2 = (double) latency / 1000000000;
get_latency = get_latency + latency2;
transactionManager.tryCommit(transactionState);
try {
transactionState.completeRequest();
} catch (Exception e) {
System.out.println("\nCAUGHT\n");
}
int expected = Bytes.toInt(row1_A.getValue(FAMILY, QUAL_A));
if (newValue != expected)
System.out.println(
"\ntestGetAfterPut : Assert 1 FAILED : expected "
+ expected
+ "newValue "
+ newValue
+ "\n");
transactionState = transactionManager.beginTransaction();
table.put(transactionState, new Put(ROW1).add(FAMILY, QUAL_A, Bytes.toBytes(newValue)));
// Delete
ts1 = System.nanoTime();
table.delete(transactionState, new Delete(ROW1).deleteColumns(FAMILY, QUAL_A));
ts2 = System.nanoTime();
latency = ts2 - ts1;
latency2 = (double) latency / 1000000000;
delete_latency = delete_latency + latency2;
transactionManager.tryCommit(transactionState);
try {
transactionState.completeRequest();
} catch (Exception e) {
System.out.println("\nCAUGHT\n");
}
}
out.println("\nAverage Begin latency : " + (double) (begin_latency / newValue));
out.println("Average End latency : " + (double) (end_latency / newValue));
out.println("Average Abort latency : " + (double) (abort_latency / newValue));
out.println("Average Put latency : " + (double) (put_latency / newValue));
out.println("Average Get latency : " + (double) (get_latency / newValue));
out.println("Average Delete latency : " + (double) (delete_latency / newValue));
out.println("Average HPut latency : " + (double) (hput_latency / newValue));
out.println("Average HGet latency : " + (double) (hget_latency / newValue));
out.println("\ntestGetAfterPut EXIT");
out.close();
}