Set<byte[]> deletesCfSet = null;
// variable to note if all Delete items are for the same CF -- metrics related
boolean deletesCfSetConsistent = true;
long startTimeMs = EnvironmentEdgeManager.currentTimeMillis();
WALEdit walEdit = new WALEdit();
MultiVersionConsistencyControl.WriteEntry w = null;
long txid = 0;
boolean walSyncSuccessful = false;
boolean locked = false;
/** Keep track of the locks we hold so we can release them in finally clause */
List<Integer> acquiredLocks = Lists.newArrayListWithCapacity(batchOp.operations.length);
// reference family maps directly so coprocessors can mutate them if desired
Map<byte[],List<KeyValue>>[] familyMaps = new Map[batchOp.operations.length];
// We try to set up a batch in the range [firstIndex,lastIndexExclusive)
int firstIndex = batchOp.nextIndexToProcess;
int lastIndexExclusive = firstIndex;
boolean success = false;
int noOfPuts = 0, noOfDeletes = 0;
try {
// ------------------------------------
// STEP 1. Try to acquire as many locks as we can, and ensure
// we acquire at least one.
// ----------------------------------
int numReadyToWrite = 0;
long now = EnvironmentEdgeManager.currentTimeMillis();
while (lastIndexExclusive < batchOp.operations.length) {
Pair<Mutation, Integer> nextPair = batchOp.operations[lastIndexExclusive];
Mutation mutation = nextPair.getFirst();
Integer providedLockId = nextPair.getSecond();
Map<byte[], List<KeyValue>> familyMap = mutation.getFamilyMap();
// store the family map reference to allow for mutations
familyMaps[lastIndexExclusive] = familyMap;
// skip anything that "ran" already
if (batchOp.retCodeDetails[lastIndexExclusive].getOperationStatusCode()
!= OperationStatusCode.NOT_RUN) {
lastIndexExclusive++;
continue;
}
try {
if (mutation instanceof Put) {
checkFamilies(familyMap.keySet());
checkTimestamps(mutation.getFamilyMap(), now);
} else {
prepareDelete((Delete) mutation);
}
} catch (NoSuchColumnFamilyException nscf) {
LOG.warn("No such column family in batch mutation", nscf);
batchOp.retCodeDetails[lastIndexExclusive] = new OperationStatus(
OperationStatusCode.BAD_FAMILY, nscf.getMessage());
lastIndexExclusive++;
continue;
} catch (DoNotRetryIOException fsce) {
// The only thing that throws a generic DoNotRetryIOException in the above code is
// checkTimestamps so that DoNotRetryIOException means that timestamps were invalid.
// If more checks are added, be sure to revisit this assumption.
LOG.warn("Batch Mutation did not pass sanity check", fsce);
batchOp.retCodeDetails[lastIndexExclusive] = new OperationStatus(
OperationStatusCode.SANITY_CHECK_FAILURE, fsce.getMessage());
lastIndexExclusive++;
continue;
}
// If we haven't got any rows in our batch, we should block to
// get the next one.
boolean shouldBlock = numReadyToWrite == 0;
Integer acquiredLockId = null;
try {
acquiredLockId = getLock(providedLockId, mutation.getRow(),
shouldBlock);
} catch (IOException ioe) {
LOG.warn("Failed getting lock in batch put, row="
+ Bytes.toStringBinary(mutation.getRow()), ioe);
}
if (acquiredLockId == null) {
// We failed to grab another lock
assert !shouldBlock : "Should never fail to get lock when blocking";
break; // stop acquiring more rows for this batch
}
if (providedLockId == null) {
acquiredLocks.add(acquiredLockId);
}
lastIndexExclusive++;
numReadyToWrite++;
if (mutation instanceof Put) {
// If Column Families stay consistent through out all of the
// individual puts then metrics can be reported as a mutliput across
// column families in the first put.
if (putsCfSet == null) {
putsCfSet = mutation.getFamilyMap().keySet();
} else {
putsCfSetConsistent = putsCfSetConsistent
&& mutation.getFamilyMap().keySet().equals(putsCfSet);
}
} else {
if (deletesCfSet == null) {
deletesCfSet = mutation.getFamilyMap().keySet();
} else {
deletesCfSetConsistent = deletesCfSetConsistent
&& mutation.getFamilyMap().keySet().equals(deletesCfSet);
}
}
}
// we should record the timestamp only after we have acquired the rowLock,
// otherwise, newer puts/deletes are not guaranteed to have a newer timestamp
now = EnvironmentEdgeManager.currentTimeMillis();
byte[] byteNow = Bytes.toBytes(now);
// Nothing to put/delete -- an exception in the above such as NoSuchColumnFamily?
if (numReadyToWrite <= 0) return 0L;
// We've now grabbed as many mutations off the list as we can
// ------------------------------------
// STEP 2. Update any LATEST_TIMESTAMP timestamps
// ----------------------------------
for (int i = firstIndex; i < lastIndexExclusive; i++) {
// skip invalid
if (batchOp.retCodeDetails[i].getOperationStatusCode()
!= OperationStatusCode.NOT_RUN) continue;
Mutation mutation = batchOp.operations[i].getFirst();
if (mutation instanceof Put) {
updateKVTimestamps(familyMaps[i].values(), byteNow);
noOfPuts++;
} else {
prepareDeleteTimestamps(familyMaps[i], byteNow);
noOfDeletes++;
}
}
lock(this.updatesLock.readLock(), numReadyToWrite);
locked = true;
//
// ------------------------------------
// Acquire the latest mvcc number
// ----------------------------------
w = mvcc.beginMemstoreInsert();
// ------------------------------------
// STEP 3. Write back to memstore
// Write to memstore. It is ok to write to memstore
// first without updating the HLog because we do not roll
// forward the memstore MVCC. The MVCC will be moved up when
// the complete operation is done. These changes are not yet
// visible to scanners till we update the MVCC. The MVCC is
// moved only when the sync is complete.
// ----------------------------------
long addedSize = 0;
for (int i = firstIndex; i < lastIndexExclusive; i++) {
if (batchOp.retCodeDetails[i].getOperationStatusCode()
!= OperationStatusCode.NOT_RUN) {
continue;
}
addedSize += applyFamilyMapToMemstore(familyMaps[i], w);
}
// ------------------------------------
// STEP 4. Build WAL edit
// ----------------------------------
for (int i = firstIndex; i < lastIndexExclusive; i++) {
// Skip puts that were determined to be invalid during preprocessing
if (batchOp.retCodeDetails[i].getOperationStatusCode()
!= OperationStatusCode.NOT_RUN) {
continue;
}
batchOp.retCodeDetails[i] = OperationStatus.SUCCESS;
Mutation m = batchOp.operations[i].getFirst();
if (!m.getWriteToWAL()) {
if (m instanceof Put) {
recordPutWithoutWal(m.getFamilyMap());
}
continue;
}
// Add WAL edits by CP
WALEdit fromCP = batchOp.walEditsFromCoprocessors[i];
if (fromCP != null) {
for (KeyValue kv : fromCP.getKeyValues()) {
walEdit.add(kv);
}
}
addFamilyMapToWALEdit(familyMaps[i], walEdit);
}