Coprocessors implement this interface to observe and mediate client actions on the region.
Since most implementations will be interested in only a subset of hooks, this class uses @@ -564,11 +564,10 @@ public interface default void -preCompactSelection(ObserverContext<RegionCoprocessorEnvironment> c, +preCompactSelection(ObserverContext<RegionCoprocessorEnvironment> c, Store store, List<? extends StoreFile> candidates, - CompactionLifeCycleTracker tracker, - CompactionRequest request) + CompactionLifeCycleTracker tracker)
Called prior to selecting the StoreFiles to compact from the list of available candidates.
@@ -752,7 +751,7 @@ public interface
preOpen

default void preOpen(ObserverContext<RegionCoprocessorEnvironment> c)
+default void preOpen(ObserverContext<RegionCoprocessorEnvironment> c)
               throws IOException
 Called before the region is reported as open to the master.
 
@@ -769,7 +768,7 @@ public interface 
 
 postOpen
-default void postOpen(ObserverContext<RegionCoprocessorEnvironment> c)
+default void postOpen(ObserverContext<RegionCoprocessorEnvironment> c)
 Called after the region is reported as open to the master.
 
 Parameters:
@@ -783,7 +782,7 @@ public interface 
 
 postLogReplay
-default void postLogReplay(ObserverContext<RegionCoprocessorEnvironment> c)
+default void postLogReplay(ObserverContext<RegionCoprocessorEnvironment> c)
 Called after the log replay on the region is over.
 
 Parameters:
@@ -797,7 +796,7 @@ public interface 
 
 preFlushScannerOpen
-default InternalScanner preFlushScannerOpen(ObserverContext<RegionCoprocessorEnvironment> c,
+default InternalScanner preFlushScannerOpen(ObserverContext<RegionCoprocessorEnvironment> c,
                                             Store store,
                                             List<KeyValueScanner> scanners,
                                             InternalScanner s,
@@ -830,7 +829,7 @@ public interface 
 
 preFlush
-default void preFlush(ObserverContext<RegionCoprocessorEnvironment> c)
+default void preFlush(ObserverContext<RegionCoprocessorEnvironment> c)
                throws IOException
 Called before the memstore is flushed to disk.
 
@@ -847,7 +846,7 @@ public interface 
 
 preFlush
-default InternalScanner preFlush(ObserverContext<RegionCoprocessorEnvironment> c,
+default InternalScanner preFlush(ObserverContext<RegionCoprocessorEnvironment> c,
                                  Store store,
                                  InternalScanner scanner)
                           throws IOException
@@ -871,7 +870,7 @@ public interface 
 
 postFlush
-default void postFlush(ObserverContext<RegionCoprocessorEnvironment> c)
+default void postFlush(ObserverContext<RegionCoprocessorEnvironment> c)
                 throws IOException
 Called after the memstore is flushed to disk.
 
@@ -888,7 +887,7 @@ public interface 
 
 postFlush
-default void postFlush(ObserverContext<RegionCoprocessorEnvironment> c,
+default void postFlush(ObserverContext<RegionCoprocessorEnvironment> c,
                        Store store,
                        StoreFile resultFile)
                 throws IOException
@@ -903,17 +902,16 @@ public interface 
+
 
 
 
 
 preCompactSelection
-default void preCompactSelection(ObserverContext<RegionCoprocessorEnvironment> c,
+default void preCompactSelection(ObserverContext<RegionCoprocessorEnvironment> c,
                                  Store store,
                                  List<? extends StoreFile> candidates,
-                                 CompactionLifeCycleTracker tracker,
-                                 CompactionRequest request)
+                                 CompactionLifeCycleTracker tracker)
                           throws IOException
 Called prior to selecting the StoreFiles to compact from the list of
  available candidates. To alter the files used for compaction, you may mutate the passed in list
@@ -924,7 +922,6 @@ public interface Throws:
 IOException
 
@@ -936,7 +933,7 @@ public interface 
 
 postCompactSelection
-default void postCompactSelection(ObserverContext<RegionCoprocessorEnvironment> c,
+default void postCompactSelection(ObserverContext<RegionCoprocessorEnvironment> c,
                                   Store store,
                                   org.apache.hadoop.hbase.shaded.com.google.common.collect.ImmutableList<? extends StoreFile> selected,
                                   CompactionLifeCycleTracker tracker,
@@ -959,7 +956,7 @@ public interface 
 
 preCompact
-default InternalScanner preCompact(ObserverContext<RegionCoprocessorEnvironment> c,
+default InternalScanner preCompact(ObserverContext<RegionCoprocessorEnvironment> c,
                                    Store store,
                                    InternalScanner scanner,
                                    ScanType scanType,
@@ -1001,7 +998,7 @@ public interface 
 
 preCompactScannerOpen
-default InternalScanner preCompactScannerOpen(ObserverContext<RegionCoprocessorEnvironment> c,
+default InternalScanner preCompactScannerOpen(ObserverContext<RegionCoprocessorEnvironment> c,
                                               Store store,
                                               List<? extends KeyValueScanner> scanners,
                                               ScanType scanType,
@@ -1043,7 +1040,7 @@ public interface 
 
 postCompact
-default void postCompact(ObserverContext<RegionCoprocessorEnvironment> c,
+default void postCompact(ObserverContext<RegionCoprocessorEnvironment> c,
                          Store store,
                          StoreFile resultFile,
                          CompactionLifeCycleTracker tracker,
@@ -1068,7 +1065,7 @@ public interface 
 
 preClose
-default void preClose(ObserverContext<RegionCoprocessorEnvironment> c,
+default void preClose(ObserverContext<RegionCoprocessorEnvironment> c,
                       boolean abortRequested)
                throws IOException
 Called before the region is reported as closed to the master.
@@ -1087,7 +1084,7 @@ public interface 
 
 postClose
-default void postClose(ObserverContext<RegionCoprocessorEnvironment> c,
+default void postClose(ObserverContext<RegionCoprocessorEnvironment> c,
                        boolean abortRequested)
 Called after the region is reported as closed to the master.
 
@@ -1103,7 +1100,7 @@ public interface 
 
 preGetOp
-default void preGetOp(ObserverContext<RegionCoprocessorEnvironment> c,
+default void preGetOp(ObserverContext<RegionCoprocessorEnvironment> c,
                       Get get,
                       List<Cell> result)
                throws IOException
@@ -1131,7 +1128,7 @@ public interface 
 
 postGetOp
-default void postGetOp(ObserverContext<RegionCoprocessorEnvironment> c,
+default void postGetOp(ObserverContext<RegionCoprocessorEnvironment> c,
                        Get get,
                        List<Cell> result)
                 throws IOException
@@ -1158,7 +1155,7 @@ public interface 
 
 preExists
-default boolean preExists(ObserverContext<RegionCoprocessorEnvironment> c,
+default boolean preExists(ObserverContext<RegionCoprocessorEnvironment> c,
                           Get get,
                           boolean exists)
                    throws IOException
@@ -1186,7 +1183,7 @@ public interface 
 
 postExists
-default boolean postExists(ObserverContext<RegionCoprocessorEnvironment> c,
+default boolean postExists(ObserverContext<RegionCoprocessorEnvironment> c,
                            Get get,
                            boolean exists)
                     throws IOException
@@ -1212,7 +1209,7 @@ public interface 
 
 prePut
-default void prePut(ObserverContext<RegionCoprocessorEnvironment> c,
+default void prePut(ObserverContext<RegionCoprocessorEnvironment> c,
                     Put put,
                     WALEdit edit,
                     Durability durability)
@@ -1243,7 +1240,7 @@ public interface 
 
 postPut
-default void postPut(ObserverContext<RegionCoprocessorEnvironment> c,
+default void postPut(ObserverContext<RegionCoprocessorEnvironment> c,
                      Put put,
                      WALEdit edit,
                      Durability durability)
@@ -1272,7 +1269,7 @@ public interface 
 
 preDelete
-default void preDelete(ObserverContext<RegionCoprocessorEnvironment> c,
+default void preDelete(ObserverContext<RegionCoprocessorEnvironment> c,
                        Delete delete,
                        WALEdit edit,
                        Durability durability)
@@ -1303,7 +1300,7 @@ public interface 
 
 prePrepareTimeStampForDeleteVersion
-default void prePrepareTimeStampForDeleteVersion(ObserverContext<RegionCoprocessorEnvironment> c,
+default void prePrepareTimeStampForDeleteVersion(ObserverContext<RegionCoprocessorEnvironment> c,
                                                  Mutation mutation,
                                                  Cell cell,
                                                  byte[] byteNow,
@@ -1333,7 +1330,7 @@ public interface 
 
 postDelete
-default void postDelete(ObserverContext<RegionCoprocessorEnvironment> c,
+default void postDelete(ObserverContext<RegionCoprocessorEnvironment> c,
                         Delete delete,
                         WALEdit edit,
                         Durability durability)
@@ -1362,7 +1359,7 @@ public interface 
 
 preBatchMutate
-default void preBatchMutate(ObserverContext<RegionCoprocessorEnvironment> c,
+default void preBatchMutate(ObserverContext<RegionCoprocessorEnvironment> c,
                             MiniBatchOperationInProgress<Mutation> miniBatchOp)
                      throws IOException
 This will be called for every batch mutation operation happening at the server. This will be
@@ -1388,7 +1385,7 @@ public interface 
 
 postBatchMutate
-default void postBatchMutate(ObserverContext<RegionCoprocessorEnvironment> c,
+default void postBatchMutate(ObserverContext<RegionCoprocessorEnvironment> c,
                              MiniBatchOperationInProgress<Mutation> miniBatchOp)
                       throws IOException
 This will be called after applying a batch of Mutations on a region. The Mutations are added to
@@ -1414,7 +1411,7 @@ public interface 
 
 postStartRegionOperation
-default void postStartRegionOperation(ObserverContext<RegionCoprocessorEnvironment> ctx,
+default void postStartRegionOperation(ObserverContext<RegionCoprocessorEnvironment> ctx,
                                       Region.Operation operation)
                                throws IOException
 This will be called for region operations where read lock is acquired in
@@ -1434,7 +1431,7 @@ public interface 
 
 postCloseRegionOperation
-default void postCloseRegionOperation(ObserverContext<RegionCoprocessorEnvironment> ctx,
+default void postCloseRegionOperation(ObserverContext<RegionCoprocessorEnvironment> ctx,
                                       Region.Operation operation)
                                throws IOException
 Called after releasing read lock in Region.closeRegionOperation().
@@ -1453,7 +1450,7 @@ public interface 
 
 postBatchMutateIndispensably
-default void postBatchMutateIndispensably(ObserverContext<RegionCoprocessorEnvironment> ctx,
+default void postBatchMutateIndispensably(ObserverContext<RegionCoprocessorEnvironment> ctx,
                                           MiniBatchOperationInProgress<Mutation> miniBatchOp,
                                           boolean success)
                                    throws IOException
@@ -1478,7 +1475,7 @@ public interface 
 
 preCheckAndPut
-default boolean preCheckAndPut(ObserverContext<RegionCoprocessorEnvironment> c,
+default boolean preCheckAndPut(ObserverContext<RegionCoprocessorEnvironment> c,
                                byte[] row,
                                byte[] family,
                                byte[] qualifier,
@@ -1520,7 +1517,7 @@ public interface 
 
 preCheckAndPutAfterRowLock
-default boolean preCheckAndPutAfterRowLock(ObserverContext<RegionCoprocessorEnvironment> c,
+default boolean preCheckAndPutAfterRowLock(ObserverContext<RegionCoprocessorEnvironment> c,
                                            byte[] row,
                                            byte[] family,
                                            byte[] qualifier,
@@ -1566,7 +1563,7 @@ public interface 
 
 postCheckAndPut
-default boolean postCheckAndPut(ObserverContext<RegionCoprocessorEnvironment> c,
+default boolean postCheckAndPut(ObserverContext<RegionCoprocessorEnvironment> c,
                                 byte[] row,
                                 byte[] family,
                                 byte[] qualifier,
@@ -1605,7 +1602,7 @@ public interface 
 
 preCheckAndDelete
-default boolean preCheckAndDelete(ObserverContext<RegionCoprocessorEnvironment> c,
+default boolean preCheckAndDelete(ObserverContext<RegionCoprocessorEnvironment> c,
                                   byte[] row,
                                   byte[] family,
                                   byte[] qualifier,
@@ -1646,7 +1643,7 @@ public interface 
 
 preCheckAndDeleteAfterRowLock
-default boolean preCheckAndDeleteAfterRowLock(ObserverContext<RegionCoprocessorEnvironment> c,
+default boolean preCheckAndDeleteAfterRowLock(ObserverContext<RegionCoprocessorEnvironment> c,
                                               byte[] row,
                                               byte[] family,
                                               byte[] qualifier,
@@ -1691,7 +1688,7 @@ public interface 
 
 postCheckAndDelete
-default boolean postCheckAndDelete(ObserverContext<RegionCoprocessorEnvironment> c,
+default boolean postCheckAndDelete(ObserverContext<RegionCoprocessorEnvironment> c,
                                    byte[] row,
                                    byte[] family,
                                    byte[] qualifier,
@@ -1730,7 +1727,7 @@ public interface 
 
 preAppend
-default Result preAppend(ObserverContext<RegionCoprocessorEnvironment> c,
+default Result preAppend(ObserverContext<RegionCoprocessorEnvironment> c,
                          Append append)
                   throws IOException
 Called before Append.
@@ -1759,7 +1756,7 @@ public interface 
 
 preAppendAfterRowLock
-default Result preAppendAfterRowLock(ObserverContext<RegionCoprocessorEnvironment> c,
+default Result preAppendAfterRowLock(ObserverContext<RegionCoprocessorEnvironment> c,
                                      Append append)
                               throws IOException
 Called before Append but after acquiring rowlock.
@@ -1792,7 +1789,7 @@ public interface 
 
 postAppend
-default Result postAppend(ObserverContext<RegionCoprocessorEnvironment> c,
+default Result postAppend(ObserverContext<RegionCoprocessorEnvironment> c,
                           Append append,
                           Result result)
                    throws IOException
@@ -1821,7 +1818,7 @@ public interface 
 
 preIncrement
-default Result preIncrement(ObserverContext<RegionCoprocessorEnvironment> c,
+default Result preIncrement(ObserverContext<RegionCoprocessorEnvironment> c,
                             Increment increment)
                      throws IOException
 Called before Increment.
@@ -1850,7 +1847,7 @@ public interface 
 
 preIncrementAfterRowLock
-default Result preIncrementAfterRowLock(ObserverContext<RegionCoprocessorEnvironment> c,
+default Result preIncrementAfterRowLock(ObserverContext<RegionCoprocessorEnvironment> c,
                                         Increment increment)
                                  throws IOException
 Called before Increment but after acquiring rowlock.
@@ -1883,7 +1880,7 @@ public interface 
 
 postIncrement
-default Result postIncrement(ObserverContext<RegionCoprocessorEnvironment> c,
+default Result postIncrement(ObserverContext<RegionCoprocessorEnvironment> c,
                              Increment increment,
                              Result result)
                       throws IOException
@@ -1912,7 +1909,7 @@ public interface 
 
 preScannerOpen
-default RegionScanner preScannerOpen(ObserverContext<RegionCoprocessorEnvironment> c,
+default RegionScanner preScannerOpen(ObserverContext<RegionCoprocessorEnvironment> c,
                                      Scan scan,
                                      RegionScanner s)
                               throws IOException
@@ -1944,7 +1941,7 @@ public interface 
 
 preStoreScannerOpen
-default KeyValueScanner preStoreScannerOpen(ObserverContext<RegionCoprocessorEnvironment> c,
+default KeyValueScanner preStoreScannerOpen(ObserverContext<RegionCoprocessorEnvironment> c,
                                             Store store,
                                             Scan scan,
                                             NavigableSet<byte[]> targetCols,
@@ -1986,7 +1983,7 @@ public interface 
 
 postScannerOpen
-default RegionScanner postScannerOpen(ObserverContext<RegionCoprocessorEnvironment> c,
+default RegionScanner postScannerOpen(ObserverContext<RegionCoprocessorEnvironment> c,
                                       Scan scan,
                                       RegionScanner s)
                                throws IOException
@@ -2015,7 +2012,7 @@ public interface 
 
 preScannerNext
-default boolean preScannerNext(ObserverContext<RegionCoprocessorEnvironment> c,
+default boolean preScannerNext(ObserverContext<RegionCoprocessorEnvironment> c,
                                InternalScanner s,
                                List<Result> result,
                                int limit,
@@ -2052,7 +2049,7 @@ public interface 
 
 postScannerNext
-default boolean postScannerNext(ObserverContext<RegionCoprocessorEnvironment> c,
+default boolean postScannerNext(ObserverContext<RegionCoprocessorEnvironment> c,
                                 InternalScanner s,
                                 List<Result> result,
                                 int limit,
@@ -2085,7 +2082,7 @@ public interface 
 
 postScannerFilterRow
-default boolean postScannerFilterRow(ObserverContext<RegionCoprocessorEnvironment> c,
+default boolean postScannerFilterRow(ObserverContext<RegionCoprocessorEnvironment> c,
                                      InternalScanner s,
                                      Cell curRowCell,
                                      boolean hasMore)
@@ -2123,7 +2120,7 @@ public interface 
 
 preScannerClose
-default void preScannerClose(ObserverContext<RegionCoprocessorEnvironment> c,
+default void preScannerClose(ObserverContext<RegionCoprocessorEnvironment> c,
                              InternalScanner s)
                       throws IOException
 Called before the client closes a scanner.
@@ -2147,7 +2144,7 @@ public interface