public static class TestRegionObserverScannerOpenHook.NoDataFromScan extends BaseRegionObserver
StoreScanner
.RegionObserver.MutationType
Coprocessor.State
PRIORITY_HIGHEST, PRIORITY_LOWEST, PRIORITY_SYSTEM, PRIORITY_USER, VERSION
Constructor and Description |
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NoDataFromScan() |
Modifier and Type | Method and Description |
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KeyValueScanner |
preStoreScannerOpen(ObserverContext<RegionCoprocessorEnvironment> c,
Store store,
Scan scan,
java.util.NavigableSet<byte[]> targetCols,
KeyValueScanner s)
Called before a store opens a new scanner.
|
postAppend, postBatchMutate, postBatchMutateIndispensably, postBulkLoadHFile, postBulkLoadHFile, postCheckAndDelete, postCheckAndPut, postClose, postCloseRegionOperation, postCommitStoreFile, postCompact, postCompact, postCompactSelection, postCompactSelection, postCompleteSplit, postDelete, postExists, postFlush, postFlush, postGetClosestRowBefore, postGetOp, postIncrement, postIncrementColumnValue, postInstantiateDeleteTracker, postLogReplay, postMutationBeforeWAL, postOpen, postPut, postRollBackSplit, postScannerClose, postScannerFilterRow, postScannerNext, postScannerOpen, postSplit, postStartRegionOperation, postStoreFileReaderOpen, postWALRestore, postWALRestore, preAppend, preAppendAfterRowLock, preBatchMutate, preBulkLoadHFile, preCheckAndDelete, preCheckAndDeleteAfterRowLock, preCheckAndPut, preCheckAndPutAfterRowLock, preClose, preCommitStoreFile, preCompact, preCompact, preCompactScannerOpen, preCompactScannerOpen, preCompactSelection, preCompactSelection, preDelete, preExists, preFlush, preFlush, preFlushScannerOpen, preGetClosestRowBefore, preGetOp, preIncrement, preIncrementAfterRowLock, preIncrementColumnValue, preOpen, prePrepareTimeStampForDeleteVersion, prePut, preRollBackSplit, preScannerClose, preScannerNext, preScannerOpen, preSplit, preSplit, preSplitAfterPONR, preSplitBeforePONR, preStoreFileReaderOpen, preWALRestore, preWALRestore, start, stop
public KeyValueScanner preStoreScannerOpen(ObserverContext<RegionCoprocessorEnvironment> c, Store store, Scan scan, java.util.NavigableSet<byte[]> targetCols, KeyValueScanner s) throws java.io.IOException
RegionObserver
See RegionObserver.preFlushScannerOpen(ObserverContext, Store, KeyValueScanner, InternalScanner)
and RegionObserver.preCompactScannerOpen(ObserverContext,
Store, List, ScanType, long, InternalScanner)
to override scanners created for flushes or compactions, resp.
Call CoprocessorEnvironment#complete to skip any subsequent chained
coprocessors.
Calling ObserverContext.bypass()
has no
effect in this hook.
preStoreScannerOpen
in interface RegionObserver
preStoreScannerOpen
in class BaseRegionObserver
c
- the environment provided by the region serverstore
- the store being scannedscan
- the Scan specificationtargetCols
- columns to be used in the scanners
- the base scanner, if not null
, from previous RegionObserver in the chainnull
to use the default implementationjava.io.IOException
- if an error occurred on the coprocessor