@Override
public MutateResponse mutate(final RpcController rpcc,
final MutateRequest request) throws ServiceException {
// rpc controller is how we bring in data via the back door; it is unprotobuf'ed data.
// It is also the conduit via which we pass back data.
PayloadCarryingRpcController controller = (PayloadCarryingRpcController)rpcc;
CellScanner cellScanner = controller != null? controller.cellScanner(): null;
// Clear scanner so we are not holding on to reference across call.
controller.setCellScanner(null);
try {
requestCount.increment();
HRegion region = getRegion(request.getRegion());
MutateResponse.Builder builder = MutateResponse.newBuilder();
MutationProto mutation = request.getMutation();
if (!region.getRegionInfo().isMetaTable()) {
cacheFlusher.reclaimMemStoreMemory();
}
Result r = null;
Boolean processed = null;
MutationType type = mutation.getMutateType();
switch (type) {
case APPEND:
r = append(region, mutation, cellScanner);
break;
case INCREMENT:
r = increment(region, mutation, cellScanner);
break;
case PUT:
Put put = ProtobufUtil.toPut(mutation, cellScanner);
if (request.hasCondition()) {
Condition condition = request.getCondition();
byte[] row = condition.getRow().toByteArray();
byte[] family = condition.getFamily().toByteArray();
byte[] qualifier = condition.getQualifier().toByteArray();
CompareOp compareOp = CompareOp.valueOf(condition.getCompareType().name());
ByteArrayComparable comparator =
ProtobufUtil.toComparator(condition.getComparator());
if (region.getCoprocessorHost() != null) {
processed = region.getCoprocessorHost().preCheckAndPut(
row, family, qualifier, compareOp, comparator, put);
}
if (processed == null) {
boolean result = region.checkAndMutate(row, family,
qualifier, compareOp, comparator, put, true);
if (region.getCoprocessorHost() != null) {
result = region.getCoprocessorHost().postCheckAndPut(row, family,
qualifier, compareOp, comparator, put, result);
}
processed = result;
}
} else {
region.put(put);
processed = Boolean.TRUE;
}
break;
case DELETE:
Delete delete = ProtobufUtil.toDelete(mutation, cellScanner);
if (request.hasCondition()) {
Condition condition = request.getCondition();
byte[] row = condition.getRow().toByteArray();
byte[] family = condition.getFamily().toByteArray();
byte[] qualifier = condition.getQualifier().toByteArray();
CompareOp compareOp = CompareOp.valueOf(condition.getCompareType().name());
ByteArrayComparable comparator =
ProtobufUtil.toComparator(condition.getComparator());
if (region.getCoprocessorHost() != null) {
processed = region.getCoprocessorHost().preCheckAndDelete(
row, family, qualifier, compareOp, comparator, delete);
}
if (processed == null) {
boolean result = region.checkAndMutate(row, family,
qualifier, compareOp, comparator, delete, true);
if (region.getCoprocessorHost() != null) {
result = region.getCoprocessorHost().postCheckAndDelete(row, family,
qualifier, compareOp, comparator, delete, result);
}
processed = result;
}
} else {
region.delete(delete, delete.getWriteToWAL());
processed = Boolean.TRUE;
}
break;
default:
throw new DoNotRetryIOException(
"Unsupported mutate type: " + type.name());
}
CellScannable cellsToReturn = null;
if (processed != null) {
builder.setProcessed(processed.booleanValue());
} else if (r != null) {
builder.setResult(ProtobufUtil.toResultNoData(r));
cellsToReturn = r;
}
if (cellsToReturn != null) {
controller.setCellScanner(cellsToReturn.cellScanner());
}
return builder.build();
} catch (IOException ie) {
checkFileSystem();
throw new ServiceException(ie);