// Retrieves the row from the table and check if it exists and has not been flagged as deleted
protected Result getRow(
RecordId recordId, Long version, int numberOfVersions, List<FieldType> fields)
throws RecordException {
Result result;
Get get = new Get(recordId.toBytes());
get.setFilter(REAL_RECORDS_FILTER);
try {
// Add the columns for the fields to get
addFieldsToGet(get, fields);
if (version != null)
get.setTimeRange(0, version + 1); // Only retrieve data within this timerange
get.setMaxVersions(numberOfVersions);
// Retrieve the data from the repository
result = recordTable.get(get);
if (result == null || result.isEmpty()) throw new RecordNotFoundException(recordId);
} catch (IOException e) {
throw new RecordException(
"Exception occurred while retrieving record '" + recordId + "' from HBase table", e);
}
return result;
}
@TimeDepend
@Test
public void testGetWith_Ts() throws Exception {
recreateTable();
fillData();
Get get = new Get(rowKey_ForTest);
get.addColumn(ColumnFamilyNameBytes, QName1);
get.setMaxVersions(3);
get.setTimeStamp(3L);
Result result = table.get(get);
Assert.assertEquals(1, result.raw().length);
get.setTimeStamp(2L);
result = table.get(get);
Assert.assertEquals(1, result.raw().length);
get.setTimeStamp(1L);
result = table.get(get);
Assert.assertEquals(1, result.raw().length);
get.setTimeStamp(0L);
result = table.get(get);
Assert.assertEquals(0, result.raw().length);
get.setTimeRange(1, 4);
result = table.get(get);
Assert.assertEquals(3, result.raw().length);
recreateTable();
}
@SuppressWarnings("deprecation")
@Override
public DResult get(Get get, long startId) throws IOException {
if (get.hasFamilies()) get.addFamily(DominoConst.INNER_FAMILY);
get.setTimeRange(0, startId + 1); // [x, y)
get.setMaxVersions();
Result preRead = region.get(get);
List<KeyValue> status = preRead.getColumn(DominoConst.INNER_FAMILY, DominoConst.STATUS_COL);
if (status == null || status.size() == 0) {
Result ret = MVCC.handleResult(this, getTrxMetaTable(), preRead, startId, null);
return new DResult(ret, null);
}
Integer lockId = region.getLock(null, get.getRow(), true);
try {
Result r =
MVCC.handleResult(this, getTrxMetaTable(), region.get(get, lockId), startId, lockId);
return new DResult(r, null);
} catch (TransactionOutOfDateException oode) {
return new DResult(null, oode.getMessage());
} catch (InvalidRowStatusException e) {
return new DResult(null, e.getMessage());
} finally {
region.releaseRowLock(lockId);
}
}
/**
* Transactional version of {@link HTable#get(Get)}
*
* @param transactionState Identifier of the transaction
* @see HTable#get(Get)
* @throws IOException
*/
public Result get(TransactionState transactionState, final Get get) throws IOException {
final long readTimestamp = transactionState.getStartTimestamp();
final Get tsget = new Get(get.getRow());
TimeRange timeRange = get.getTimeRange();
long startTime = timeRange.getMin();
long endTime = Math.min(timeRange.getMax(), readTimestamp + 1);
// int maxVersions = get.getMaxVersions();
tsget
.setTimeRange(startTime, endTime)
.setMaxVersions((int) (versionsAvg + CACHE_VERSIONS_OVERHEAD));
Map<byte[], NavigableSet<byte[]>> kvs = get.getFamilyMap();
for (Map.Entry<byte[], NavigableSet<byte[]>> entry : kvs.entrySet()) {
byte[] family = entry.getKey();
NavigableSet<byte[]> qualifiers = entry.getValue();
if (qualifiers == null || qualifiers.isEmpty()) {
tsget.addFamily(family);
} else {
for (byte[] qualifier : qualifiers) {
tsget.addColumn(family, qualifier);
}
}
}
// Result result;
// Result filteredResult;
// do {
// result = super.get(tsget);
// filteredResult = filter(super.get(tsget), readTimestamp, maxVersions);
// } while (!result.isEmpty() && filteredResult == null);
getsPerformed++;
Result result =
filter(
transactionState,
super.get(tsget),
readTimestamp,
(int) (versionsAvg + CACHE_VERSIONS_OVERHEAD));
return result == null ? new Result() : result;
// Scan scan = new Scan(get);
// scan.setRetainDeletesInOutput(true);
// ResultScanner rs = this.getScanner(transactionState, scan);
// Result r = rs.next();
// if (r == null) {
// r = new Result();
// }
// return r;
}
@Override
public GetBuilder setTimeRange(long minStamp, long maxStamp) throws IOException {
get.setTimeRange(minStamp, maxStamp);
return this;
}
/**
* Use PreIncrement hook of BaseRegionObserver to overcome deficiencies in Increment
* implementation (HBASE-10254): 1) Lack of recognition and identification of when the key value
* to increment doesn't exist 2) Lack of the ability to set the timestamp of the updated key
* value. Works the same as existing region.increment(), except assumes there is a single column
* to increment and uses Phoenix LONG encoding.
*
* @author jtaylor
* @since 3.0.0
*/
@Override
public Result preIncrement(
final ObserverContext<RegionCoprocessorEnvironment> e, final Increment increment)
throws IOException {
RegionCoprocessorEnvironment env = e.getEnvironment();
// We need to set this to prevent region.increment from being called
e.bypass();
e.complete();
HRegion region = env.getRegion();
byte[] row = increment.getRow();
TimeRange tr = increment.getTimeRange();
region.startRegionOperation();
try {
Integer lid = region.getLock(null, row, true);
try {
long maxTimestamp = tr.getMax();
if (maxTimestamp == HConstants.LATEST_TIMESTAMP) {
maxTimestamp = EnvironmentEdgeManager.currentTimeMillis();
tr = new TimeRange(tr.getMin(), maxTimestamp);
}
Get get = new Get(row);
get.setTimeRange(tr.getMin(), tr.getMax());
for (Map.Entry<byte[], NavigableMap<byte[], Long>> entry :
increment.getFamilyMap().entrySet()) {
byte[] cf = entry.getKey();
for (byte[] cq : entry.getValue().keySet()) {
get.addColumn(cf, cq);
}
}
Result result = region.get(get);
if (result.isEmpty()) {
return getErrorResult(
row, maxTimestamp, SQLExceptionCode.SEQUENCE_UNDEFINED.getErrorCode());
}
KeyValue currentValueKV = Sequence.getCurrentValueKV(result);
KeyValue incrementByKV = Sequence.getIncrementByKV(result);
KeyValue cacheSizeKV = Sequence.getCacheSizeKV(result);
long value =
PDataType.LONG
.getCodec()
.decodeLong(currentValueKV.getBuffer(), currentValueKV.getValueOffset(), null);
long incrementBy =
PDataType.LONG
.getCodec()
.decodeLong(incrementByKV.getBuffer(), incrementByKV.getValueOffset(), null);
int cacheSize =
PDataType.INTEGER
.getCodec()
.decodeInt(cacheSizeKV.getBuffer(), cacheSizeKV.getValueOffset(), null);
value += incrementBy * cacheSize;
byte[] valueBuffer = new byte[PDataType.LONG.getByteSize()];
PDataType.LONG.getCodec().encodeLong(value, valueBuffer, 0);
Put put = new Put(row, currentValueKV.getTimestamp());
// Hold timestamp constant for sequences, so that clients always only see the latest value
// regardless of when they connect.
KeyValue newCurrentValueKV =
KeyValueUtil.newKeyValue(
row,
currentValueKV.getFamily(),
currentValueKV.getQualifier(),
currentValueKV.getTimestamp(),
valueBuffer);
put.add(newCurrentValueKV);
@SuppressWarnings("unchecked")
Pair<Mutation, Integer>[] mutations = new Pair[1];
mutations[0] = new Pair<Mutation, Integer>(put, lid);
region.batchMutate(mutations);
return Sequence.replaceCurrentValueKV(result, newCurrentValueKV);
} finally {
region.releaseRowLock(lid);
}
} catch (Throwable t) {
ServerUtil.throwIOException("Increment of sequence " + Bytes.toStringBinary(row), t);
return null; // Impossible
} finally {
region.closeRegionOperation();
}
}
/**
* Override the preAppend for checkAndPut and checkAndDelete, as we need the ability to a) set the
* TimeRange for the Get being done and b) return something back to the client to indicate
* success/failure
*/
@SuppressWarnings("deprecation")
@Override
public Result preAppend(
final ObserverContext<RegionCoprocessorEnvironment> e, final Append append)
throws IOException {
byte[] opBuf = append.getAttribute(OPERATION_ATTRIB);
if (opBuf == null) {
return null;
}
Op op = Op.values()[opBuf[0]];
long clientTimestamp = HConstants.LATEST_TIMESTAMP;
byte[] clientTimestampBuf = append.getAttribute(MAX_TIMERANGE_ATTRIB);
if (clientTimestampBuf != null) {
clientTimestamp = Bytes.toLong(clientTimestampBuf);
}
boolean hadClientTimestamp = (clientTimestamp != HConstants.LATEST_TIMESTAMP);
if (hadClientTimestamp) {
// Prevent race condition of creating two sequences at the same timestamp
// by looking for a sequence at or after the timestamp at which it'll be
// created.
if (op == Op.CREATE_SEQUENCE) {
clientTimestamp++;
}
} else {
clientTimestamp = EnvironmentEdgeManager.currentTimeMillis();
clientTimestampBuf = Bytes.toBytes(clientTimestamp);
}
RegionCoprocessorEnvironment env = e.getEnvironment();
// We need to set this to prevent region.append from being called
e.bypass();
e.complete();
HRegion region = env.getRegion();
byte[] row = append.getRow();
region.startRegionOperation();
try {
Integer lid = region.getLock(null, row, true);
try {
KeyValue keyValue = append.getFamilyMap().values().iterator().next().iterator().next();
byte[] family = keyValue.getFamily();
byte[] qualifier = keyValue.getQualifier();
Get get = new Get(row);
get.setTimeRange(MetaDataProtocol.MIN_TABLE_TIMESTAMP, clientTimestamp);
get.addColumn(family, qualifier);
Result result = region.get(get);
if (result.isEmpty()) {
if (op == Op.DROP_SEQUENCE || op == Op.RESET_SEQUENCE) {
return getErrorResult(
row, clientTimestamp, SQLExceptionCode.SEQUENCE_UNDEFINED.getErrorCode());
}
} else {
if (op == Op.CREATE_SEQUENCE) {
return getErrorResult(
row, clientTimestamp, SQLExceptionCode.SEQUENCE_ALREADY_EXIST.getErrorCode());
}
}
Mutation m = null;
switch (op) {
case RESET_SEQUENCE:
KeyValue currentValueKV = result.raw()[0];
long expectedValue =
PDataType.LONG
.getCodec()
.decodeLong(append.getAttribute(CURRENT_VALUE_ATTRIB), 0, null);
long value =
PDataType.LONG
.getCodec()
.decodeLong(currentValueKV.getBuffer(), currentValueKV.getValueOffset(), null);
// Timestamp should match exactly, or we may have the wrong sequence
if (expectedValue != value || currentValueKV.getTimestamp() != clientTimestamp) {
return new Result(
Collections.singletonList(
KeyValueUtil.newKeyValue(
row,
PhoenixDatabaseMetaData.SEQUENCE_FAMILY_BYTES,
QueryConstants.EMPTY_COLUMN_BYTES,
currentValueKV.getTimestamp(),
ByteUtil.EMPTY_BYTE_ARRAY)));
}
m = new Put(row, currentValueKV.getTimestamp());
m.getFamilyMap().putAll(append.getFamilyMap());
break;
case DROP_SEQUENCE:
m = new Delete(row, clientTimestamp, null);
break;
case CREATE_SEQUENCE:
m = new Put(row, clientTimestamp);
m.getFamilyMap().putAll(append.getFamilyMap());
break;
}
if (!hadClientTimestamp) {
for (List<KeyValue> kvs : m.getFamilyMap().values()) {
for (KeyValue kv : kvs) {
kv.updateLatestStamp(clientTimestampBuf);
}
}
}
@SuppressWarnings("unchecked")
Pair<Mutation, Integer>[] mutations = new Pair[1];
mutations[0] = new Pair<Mutation, Integer>(m, lid);
region.batchMutate(mutations);
long serverTimestamp = MetaDataUtil.getClientTimeStamp(m);
// Return result with single KeyValue. The only piece of information
// the client cares about is the timestamp, which is the timestamp of
// when the mutation was actually performed (useful in the case of .
return new Result(
Collections.singletonList(
KeyValueUtil.newKeyValue(
row,
PhoenixDatabaseMetaData.SEQUENCE_FAMILY_BYTES,
QueryConstants.EMPTY_COLUMN_BYTES,
serverTimestamp,
SUCCESS_VALUE)));
} finally {
region.releaseRowLock(lid);
}
} catch (Throwable t) {
ServerUtil.throwIOException("Increment of sequence " + Bytes.toStringBinary(row), t);
return null; // Impossible
} finally {
region.closeRegionOperation();
}
}
private Result filter(
TransactionState state, Result result, long startTimestamp, int localVersions)
throws IOException {
if (result == null) {
return null;
}
List<KeyValue> kvs = result.list();
if (kvs == null) {
return result;
}
Map<ByteArray, Map<ByteArray, Integer>> occurrences =
new HashMap<TransactionalTable.ByteArray, Map<ByteArray, Integer>>();
Map<ByteArray, Map<ByteArray, Long>> minTimestamp =
new HashMap<TransactionalTable.ByteArray, Map<ByteArray, Long>>();
List<KeyValue> nonDeletes = new ArrayList<KeyValue>();
List<KeyValue> filtered = new ArrayList<KeyValue>();
Map<ByteArray, Set<ByteArray>> read = new HashMap<ByteArray, Set<ByteArray>>();
DeleteTracker tracker = new DeleteTracker();
for (KeyValue kv : kvs) {
ByteArray family = new ByteArray(kv.getFamily());
ByteArray qualifier = new ByteArray(kv.getQualifier());
Set<ByteArray> readQualifiers = read.get(family);
if (readQualifiers == null) {
readQualifiers = new HashSet<TransactionalTable.ByteArray>();
read.put(family, readQualifiers);
} else if (readQualifiers.contains(qualifier)) continue;
// RowKey rk = new RowKey(kv.getRow(), getTableName());
if (state.tsoclient.validRead(kv.getTimestamp(), startTimestamp)) {
if (!tracker.addDeleted(kv)) nonDeletes.add(kv);
{
// Read valid value
readQualifiers.add(qualifier);
// statistics
// elementsGotten++;
Map<ByteArray, Integer> occurrencesCols = occurrences.get(family);
Integer times = null;
if (occurrencesCols != null) {
times = occurrencesCols.get(qualifier);
}
if (times != null) {
// elementsRead += times;
versionsAvg = times > versionsAvg ? times : alpha * versionsAvg + (1 - alpha) * times;
// extraVersionsAvg = times > extraVersionsAvg ? times : alpha *
// extraVersionsAvg + (1 - alpha) * times;
} else {
// elementsRead++;
versionsAvg = alpha * versionsAvg + (1 - alpha);
// extraVersionsAvg = alpha * extraVersionsAvg + (1 - alpha);
}
}
} else {
Map<ByteArray, Integer> occurrencesCols = occurrences.get(family);
Map<ByteArray, Long> minTimestampCols = minTimestamp.get(family);
if (occurrencesCols == null) {
occurrencesCols = new HashMap<TransactionalTable.ByteArray, Integer>();
minTimestampCols = new HashMap<TransactionalTable.ByteArray, Long>();
occurrences.put(family, occurrencesCols);
minTimestamp.put(family, minTimestampCols);
}
Integer times = occurrencesCols.get(qualifier);
Long timestamp = minTimestampCols.get(qualifier);
if (times == null) {
times = 0;
timestamp = kv.getTimestamp();
}
times++;
timestamp = Math.min(timestamp, kv.getTimestamp());
if (times == localVersions) {
// We need to fetch more versions
Get get = new Get(kv.getRow());
get.addColumn(kv.getFamily(), kv.getQualifier());
get.setMaxVersions(localVersions);
Result r;
GOTRESULT:
do {
extraGetsPerformed++;
get.setTimeRange(0, timestamp);
r = this.get(get);
List<KeyValue> list = r.list();
if (list == null) break;
for (KeyValue t : list) {
times++;
timestamp = Math.min(timestamp, t.getTimestamp());
// rk = new RowKey(kv.getRow(), getTableName());
if (state.tsoclient.validRead(t.getTimestamp(), startTimestamp)) {
if (!tracker.addDeleted(t)) nonDeletes.add(t);
readQualifiers.add(qualifier);
elementsGotten++;
elementsRead += times;
versionsAvg =
times > versionsAvg ? times : alpha * versionsAvg + (1 - alpha) * times;
extraVersionsAvg =
times > extraVersionsAvg
? times
: alpha * extraVersionsAvg + (1 - alpha) * times;
break GOTRESULT;
}
}
} while (r.size() == localVersions);
} else {
occurrencesCols.put(qualifier, times);
minTimestampCols.put(qualifier, timestamp);
}
}
}
for (KeyValue kv : nonDeletes) {
if (!tracker.isDeleted(kv)) {
filtered.add(kv);
}
}
// cacheVersions = (int) versionsAvg;
if (filtered.isEmpty()) {
return null;
}
return new Result(filtered);
}
