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@InterfaceAudience.Public @InterfaceStability.Evolving public interface MasterObserver
Defines coprocessor hooks for interacting with operations on the
HMaster
process.
Nested Class Summary |
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Nested classes/interfaces inherited from interface org.apache.hadoop.hbase.Coprocessor |
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Coprocessor.State |
Field Summary |
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Fields inherited from interface org.apache.hadoop.hbase.Coprocessor |
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PRIORITY_HIGHEST, PRIORITY_LOWEST, PRIORITY_SYSTEM, PRIORITY_USER, VERSION |
Method Summary | |
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void |
postAddColumn(ObserverContext<MasterCoprocessorEnvironment> ctx,
byte[] tableName,
HColumnDescriptor column)
Called after the new column family has been created. |
void |
postAddColumnHandler(ObserverContext<MasterCoprocessorEnvironment> ctx,
byte[] tableName,
HColumnDescriptor column)
Called after the new column family has been created. |
void |
postAssign(ObserverContext<MasterCoprocessorEnvironment> ctx,
HRegionInfo regionInfo)
Called after the region assignment has been requested. |
void |
postBalance(ObserverContext<MasterCoprocessorEnvironment> ctx,
List<RegionPlan> plans)
Called after the balancing plan has been submitted. |
void |
postBalanceSwitch(ObserverContext<MasterCoprocessorEnvironment> ctx,
boolean oldValue,
boolean newValue)
Called after the flag to enable/disable balancing has changed. |
void |
postCloneSnapshot(ObserverContext<MasterCoprocessorEnvironment> ctx,
HBaseProtos.SnapshotDescription snapshot,
HTableDescriptor hTableDescriptor)
Called after a snapshot clone operation has been requested. |
void |
postCreateTable(ObserverContext<MasterCoprocessorEnvironment> ctx,
HTableDescriptor desc,
HRegionInfo[] regions)
Called after the createTable operation has been requested. |
void |
postCreateTableHandler(ObserverContext<MasterCoprocessorEnvironment> ctx,
HTableDescriptor desc,
HRegionInfo[] regions)
Called after the createTable operation has been requested. |
void |
postDeleteColumn(ObserverContext<MasterCoprocessorEnvironment> ctx,
byte[] tableName,
byte[] c)
Called after the column family has been deleted. |
void |
postDeleteColumnHandler(ObserverContext<MasterCoprocessorEnvironment> ctx,
byte[] tableName,
byte[] c)
Called after the column family has been deleted. |
void |
postDeleteSnapshot(ObserverContext<MasterCoprocessorEnvironment> ctx,
HBaseProtos.SnapshotDescription snapshot)
Called after the delete snapshot operation has been requested. |
void |
postDeleteTable(ObserverContext<MasterCoprocessorEnvironment> ctx,
byte[] tableName)
Called after the deleteTable operation has been requested. |
void |
postDeleteTableHandler(ObserverContext<MasterCoprocessorEnvironment> ctx,
byte[] tableName)
Called after HMaster deletes a
table. |
void |
postDisableTable(ObserverContext<MasterCoprocessorEnvironment> ctx,
byte[] tableName)
Called after the disableTable operation has been requested. |
void |
postDisableTableHandler(ObserverContext<MasterCoprocessorEnvironment> ctx,
byte[] tableName)
Called after the disableTable operation has been requested. |
void |
postEnableTable(ObserverContext<MasterCoprocessorEnvironment> ctx,
byte[] tableName)
Called after the enableTable operation has been requested. |
void |
postEnableTableHandler(ObserverContext<MasterCoprocessorEnvironment> ctx,
byte[] tableName)
Called after the enableTable operation has been requested. |
void |
postModifyColumn(ObserverContext<MasterCoprocessorEnvironment> ctx,
byte[] tableName,
HColumnDescriptor descriptor)
Called after the column family has been updated. |
void |
postModifyColumnHandler(ObserverContext<MasterCoprocessorEnvironment> ctx,
byte[] tableName,
HColumnDescriptor descriptor)
Called after the column family has been updated. |
void |
postModifyTable(ObserverContext<MasterCoprocessorEnvironment> ctx,
byte[] tableName,
HTableDescriptor htd)
Called after the modifyTable operation has been requested. |
void |
postModifyTableHandler(ObserverContext<MasterCoprocessorEnvironment> ctx,
byte[] tableName,
HTableDescriptor htd)
Called after to modifying a table's properties. |
void |
postMove(ObserverContext<MasterCoprocessorEnvironment> ctx,
HRegionInfo region,
ServerName srcServer,
ServerName destServer)
Called after the region move has been requested. |
void |
postRegionOffline(ObserverContext<MasterCoprocessorEnvironment> ctx,
HRegionInfo regionInfo)
Called after the region has been marked offline. |
void |
postRestoreSnapshot(ObserverContext<MasterCoprocessorEnvironment> ctx,
HBaseProtos.SnapshotDescription snapshot,
HTableDescriptor hTableDescriptor)
Called after a snapshot restore operation has been requested. |
void |
postSnapshot(ObserverContext<MasterCoprocessorEnvironment> ctx,
HBaseProtos.SnapshotDescription snapshot,
HTableDescriptor hTableDescriptor)
Called after the snapshot operation has been requested. |
void |
postStartMaster(ObserverContext<MasterCoprocessorEnvironment> ctx)
Called immediately after an active master instance has completed initialization. |
void |
postUnassign(ObserverContext<MasterCoprocessorEnvironment> ctx,
HRegionInfo regionInfo,
boolean force)
Called after the region unassignment has been requested. |
void |
preAddColumn(ObserverContext<MasterCoprocessorEnvironment> ctx,
byte[] tableName,
HColumnDescriptor column)
Called prior to adding a new column family to the table. |
void |
preAddColumnHandler(ObserverContext<MasterCoprocessorEnvironment> ctx,
byte[] tableName,
HColumnDescriptor column)
Called prior to adding a new column family to the table. |
void |
preAssign(ObserverContext<MasterCoprocessorEnvironment> ctx,
HRegionInfo regionInfo)
Called prior to assigning a specific region. |
void |
preBalance(ObserverContext<MasterCoprocessorEnvironment> ctx)
Called prior to requesting rebalancing of the cluster regions, though after the initial checks for regions in transition and the balance switch flag. |
boolean |
preBalanceSwitch(ObserverContext<MasterCoprocessorEnvironment> ctx,
boolean newValue)
Called prior to modifying the flag used to enable/disable region balancing. |
void |
preCloneSnapshot(ObserverContext<MasterCoprocessorEnvironment> ctx,
HBaseProtos.SnapshotDescription snapshot,
HTableDescriptor hTableDescriptor)
Called before a snapshot is cloned. |
void |
preCreateTable(ObserverContext<MasterCoprocessorEnvironment> ctx,
HTableDescriptor desc,
HRegionInfo[] regions)
Called before a new table is created by HMaster . |
void |
preCreateTableHandler(ObserverContext<MasterCoprocessorEnvironment> ctx,
HTableDescriptor desc,
HRegionInfo[] regions)
Called before a new table is created by HMaster . |
void |
preDeleteColumn(ObserverContext<MasterCoprocessorEnvironment> ctx,
byte[] tableName,
byte[] c)
Called prior to deleting the entire column family. |
void |
preDeleteColumnHandler(ObserverContext<MasterCoprocessorEnvironment> ctx,
byte[] tableName,
byte[] c)
Called prior to deleting the entire column family. |
void |
preDeleteSnapshot(ObserverContext<MasterCoprocessorEnvironment> ctx,
HBaseProtos.SnapshotDescription snapshot)
Called before a snapshot is deleted. |
void |
preDeleteTable(ObserverContext<MasterCoprocessorEnvironment> ctx,
byte[] tableName)
Called before HMaster deletes a
table. |
void |
preDeleteTableHandler(ObserverContext<MasterCoprocessorEnvironment> ctx,
byte[] tableName)
Called before HMaster deletes a
table. |
void |
preDisableTable(ObserverContext<MasterCoprocessorEnvironment> ctx,
byte[] tableName)
Called prior to disabling a table. |
void |
preDisableTableHandler(ObserverContext<MasterCoprocessorEnvironment> ctx,
byte[] tableName)
Called prior to disabling a table. |
void |
preEnableTable(ObserverContext<MasterCoprocessorEnvironment> ctx,
byte[] tableName)
Called prior to enabling a table. |
void |
preEnableTableHandler(ObserverContext<MasterCoprocessorEnvironment> ctx,
byte[] tableName)
Called prior to enabling a table. |
void |
preModifyColumn(ObserverContext<MasterCoprocessorEnvironment> ctx,
byte[] tableName,
HColumnDescriptor descriptor)
Called prior to modifying a column family's attributes. |
void |
preModifyColumnHandler(ObserverContext<MasterCoprocessorEnvironment> ctx,
byte[] tableName,
HColumnDescriptor descriptor)
Called prior to modifying a column family's attributes. |
void |
preModifyTable(ObserverContext<MasterCoprocessorEnvironment> ctx,
byte[] tableName,
HTableDescriptor htd)
Called prior to modifying a table's properties. |
void |
preModifyTableHandler(ObserverContext<MasterCoprocessorEnvironment> ctx,
byte[] tableName,
HTableDescriptor htd)
Called prior to modifying a table's properties. |
void |
preMove(ObserverContext<MasterCoprocessorEnvironment> ctx,
HRegionInfo region,
ServerName srcServer,
ServerName destServer)
Called prior to moving a given region from one region server to another. |
void |
preRegionOffline(ObserverContext<MasterCoprocessorEnvironment> ctx,
HRegionInfo regionInfo)
Called prior to marking a given region as offline. |
void |
preRestoreSnapshot(ObserverContext<MasterCoprocessorEnvironment> ctx,
HBaseProtos.SnapshotDescription snapshot,
HTableDescriptor hTableDescriptor)
Called before a snapshot is restored. |
void |
preShutdown(ObserverContext<MasterCoprocessorEnvironment> ctx)
Called prior to shutting down the full HBase cluster, including this HMaster process. |
void |
preSnapshot(ObserverContext<MasterCoprocessorEnvironment> ctx,
HBaseProtos.SnapshotDescription snapshot,
HTableDescriptor hTableDescriptor)
Called before a new snapshot is taken. |
void |
preStopMaster(ObserverContext<MasterCoprocessorEnvironment> ctx)
Called immediately prior to stopping this HMaster process. |
void |
preUnassign(ObserverContext<MasterCoprocessorEnvironment> ctx,
HRegionInfo regionInfo,
boolean force)
Called prior to unassigning a given region. |
Methods inherited from interface org.apache.hadoop.hbase.Coprocessor |
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start, stop |
Method Detail |
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void preCreateTable(ObserverContext<MasterCoprocessorEnvironment> ctx, HTableDescriptor desc, HRegionInfo[] regions) throws IOException
HMaster
. Called as part of create
table RPC call.
It can't bypass the default action, e.g., ctx.bypass() won't have effect.
ctx
- the environment to interact with the framework and masterdesc
- the HTableDescriptor for the tableregions
- the initial regions created for the table
IOException
void postCreateTable(ObserverContext<MasterCoprocessorEnvironment> ctx, HTableDescriptor desc, HRegionInfo[] regions) throws IOException
ctx
- the environment to interact with the framework and masterdesc
- the HTableDescriptor for the tableregions
- the initial regions created for the table
IOException
void preCreateTableHandler(ObserverContext<MasterCoprocessorEnvironment> ctx, HTableDescriptor desc, HRegionInfo[] regions) throws IOException
HMaster
. Called as part of create
table handler and it is async to the create RPC call.
It can't bypass the default action, e.g., ctx.bypass() won't have effect.
ctx
- the environment to interact with the framework and masterdesc
- the HTableDescriptor for the tableregions
- the initial regions created for the table
IOException
void postCreateTableHandler(ObserverContext<MasterCoprocessorEnvironment> ctx, HTableDescriptor desc, HRegionInfo[] regions) throws IOException
ctx
- the environment to interact with the framework and masterdesc
- the HTableDescriptor for the tableregions
- the initial regions created for the table
IOException
void preDeleteTable(ObserverContext<MasterCoprocessorEnvironment> ctx, byte[] tableName) throws IOException
HMaster
deletes a
table. Called as part of delete table RPC call.
It can't bypass the default action, e.g., ctx.bypass() won't have effect.
ctx
- the environment to interact with the framework and mastertableName
- the name of the table
IOException
void postDeleteTable(ObserverContext<MasterCoprocessorEnvironment> ctx, byte[] tableName) throws IOException
ctx
- the environment to interact with the framework and mastertableName
- the name of the table
IOException
void preDeleteTableHandler(ObserverContext<MasterCoprocessorEnvironment> ctx, byte[] tableName) throws IOException
HMaster
deletes a
table. Called as part of delete table handler and
it is async to the delete RPC call.
It can't bypass the default action, e.g., ctx.bypass() won't have effect.
ctx
- the environment to interact with the framework and mastertableName
- the name of the table
IOException
void postDeleteTableHandler(ObserverContext<MasterCoprocessorEnvironment> ctx, byte[] tableName) throws IOException
HMaster
deletes a
table. Called as part of delete table handler and it is async to the
delete RPC call.
It can't bypass the default action, e.g., ctx.bypass() won't have effect.
ctx
- the environment to interact with the framework and mastertableName
- the name of the table
IOException
void preModifyTable(ObserverContext<MasterCoprocessorEnvironment> ctx, byte[] tableName, HTableDescriptor htd) throws IOException
ctx
- the environment to interact with the framework and mastertableName
- the name of the tablehtd
- the HTableDescriptor
IOException
void postModifyTable(ObserverContext<MasterCoprocessorEnvironment> ctx, byte[] tableName, HTableDescriptor htd) throws IOException
ctx
- the environment to interact with the framework and mastertableName
- the name of the tablehtd
- the HTableDescriptor
IOException
void preModifyTableHandler(ObserverContext<MasterCoprocessorEnvironment> ctx, byte[] tableName, HTableDescriptor htd) throws IOException
ctx
- the environment to interact with the framework and mastertableName
- the name of the tablehtd
- the HTableDescriptor
IOException
void postModifyTableHandler(ObserverContext<MasterCoprocessorEnvironment> ctx, byte[] tableName, HTableDescriptor htd) throws IOException
ctx
- the environment to interact with the framework and mastertableName
- the name of the tablehtd
- the HTableDescriptor
IOException
void preAddColumn(ObserverContext<MasterCoprocessorEnvironment> ctx, byte[] tableName, HColumnDescriptor column) throws IOException
ctx
- the environment to interact with the framework and mastertableName
- the name of the tablecolumn
- the HColumnDescriptor
IOException
void postAddColumn(ObserverContext<MasterCoprocessorEnvironment> ctx, byte[] tableName, HColumnDescriptor column) throws IOException
ctx
- the environment to interact with the framework and mastertableName
- the name of the tablecolumn
- the HColumnDescriptor
IOException
void preAddColumnHandler(ObserverContext<MasterCoprocessorEnvironment> ctx, byte[] tableName, HColumnDescriptor column) throws IOException
ctx
- the environment to interact with the framework and mastertableName
- the name of the tablecolumn
- the HColumnDescriptor
IOException
void postAddColumnHandler(ObserverContext<MasterCoprocessorEnvironment> ctx, byte[] tableName, HColumnDescriptor column) throws IOException
ctx
- the environment to interact with the framework and mastertableName
- the name of the tablecolumn
- the HColumnDescriptor
IOException
void preModifyColumn(ObserverContext<MasterCoprocessorEnvironment> ctx, byte[] tableName, HColumnDescriptor descriptor) throws IOException
ctx
- the environment to interact with the framework and mastertableName
- the name of the tabledescriptor
- the HColumnDescriptor
IOException
void postModifyColumn(ObserverContext<MasterCoprocessorEnvironment> ctx, byte[] tableName, HColumnDescriptor descriptor) throws IOException
ctx
- the environment to interact with the framework and mastertableName
- the name of the tabledescriptor
- the HColumnDescriptor
IOException
void preModifyColumnHandler(ObserverContext<MasterCoprocessorEnvironment> ctx, byte[] tableName, HColumnDescriptor descriptor) throws IOException
ctx
- the environment to interact with the framework and mastertableName
- the name of the tabledescriptor
- the HColumnDescriptor
IOException
void postModifyColumnHandler(ObserverContext<MasterCoprocessorEnvironment> ctx, byte[] tableName, HColumnDescriptor descriptor) throws IOException
ctx
- the environment to interact with the framework and mastertableName
- the name of the tabledescriptor
- the HColumnDescriptor
IOException
void preDeleteColumn(ObserverContext<MasterCoprocessorEnvironment> ctx, byte[] tableName, byte[] c) throws IOException
ctx
- the environment to interact with the framework and mastertableName
- the name of the tablec
- the column
IOException
void postDeleteColumn(ObserverContext<MasterCoprocessorEnvironment> ctx, byte[] tableName, byte[] c) throws IOException
ctx
- the environment to interact with the framework and mastertableName
- the name of the tablec
- the column
IOException
void preDeleteColumnHandler(ObserverContext<MasterCoprocessorEnvironment> ctx, byte[] tableName, byte[] c) throws IOException
ctx
- the environment to interact with the framework and mastertableName
- the name of the tablec
- the column
IOException
void postDeleteColumnHandler(ObserverContext<MasterCoprocessorEnvironment> ctx, byte[] tableName, byte[] c) throws IOException
ctx
- the environment to interact with the framework and mastertableName
- the name of the tablec
- the column
IOException
void preEnableTable(ObserverContext<MasterCoprocessorEnvironment> ctx, byte[] tableName) throws IOException
ctx
- the environment to interact with the framework and mastertableName
- the name of the table
IOException
void postEnableTable(ObserverContext<MasterCoprocessorEnvironment> ctx, byte[] tableName) throws IOException
ctx
- the environment to interact with the framework and mastertableName
- the name of the table
IOException
void preEnableTableHandler(ObserverContext<MasterCoprocessorEnvironment> ctx, byte[] tableName) throws IOException
ctx
- the environment to interact with the framework and mastertableName
- the name of the table
IOException
void postEnableTableHandler(ObserverContext<MasterCoprocessorEnvironment> ctx, byte[] tableName) throws IOException
ctx
- the environment to interact with the framework and mastertableName
- the name of the table
IOException
void preDisableTable(ObserverContext<MasterCoprocessorEnvironment> ctx, byte[] tableName) throws IOException
ctx
- the environment to interact with the framework and mastertableName
- the name of the table
IOException
void postDisableTable(ObserverContext<MasterCoprocessorEnvironment> ctx, byte[] tableName) throws IOException
ctx
- the environment to interact with the framework and mastertableName
- the name of the table
IOException
void preDisableTableHandler(ObserverContext<MasterCoprocessorEnvironment> ctx, byte[] tableName) throws IOException
ctx
- the environment to interact with the framework and mastertableName
- the name of the table
IOException
void postDisableTableHandler(ObserverContext<MasterCoprocessorEnvironment> ctx, byte[] tableName) throws IOException
ctx
- the environment to interact with the framework and mastertableName
- the name of the table
IOException
void preMove(ObserverContext<MasterCoprocessorEnvironment> ctx, HRegionInfo region, ServerName srcServer, ServerName destServer) throws IOException
ctx
- the environment to interact with the framework and masterregion
- the HRegionInfosrcServer
- the source ServerNamedestServer
- the destination ServerName
IOException
void postMove(ObserverContext<MasterCoprocessorEnvironment> ctx, HRegionInfo region, ServerName srcServer, ServerName destServer) throws IOException
ctx
- the environment to interact with the framework and masterregion
- the HRegionInfosrcServer
- the source ServerNamedestServer
- the destination ServerName
IOException
void preAssign(ObserverContext<MasterCoprocessorEnvironment> ctx, HRegionInfo regionInfo) throws IOException
ctx
- the environment to interact with the framework and masterregionInfo
- the regionInfo of the region
IOException
void postAssign(ObserverContext<MasterCoprocessorEnvironment> ctx, HRegionInfo regionInfo) throws IOException
ctx
- the environment to interact with the framework and masterregionInfo
- the regionInfo of the region
IOException
void preUnassign(ObserverContext<MasterCoprocessorEnvironment> ctx, HRegionInfo regionInfo, boolean force) throws IOException
ctx
- the environment to interact with the framework and masterregionInfo
- force
- whether to force unassignment or not
IOException
void postUnassign(ObserverContext<MasterCoprocessorEnvironment> ctx, HRegionInfo regionInfo, boolean force) throws IOException
ctx
- the environment to interact with the framework and masterregionInfo
- force
- whether to force unassignment or not
IOException
void preRegionOffline(ObserverContext<MasterCoprocessorEnvironment> ctx, HRegionInfo regionInfo) throws IOException
ctx.bypass()
will not have any
impact on this hook.
ctx
- the environment to interact with the framework and masterregionInfo
-
IOException
void postRegionOffline(ObserverContext<MasterCoprocessorEnvironment> ctx, HRegionInfo regionInfo) throws IOException
ctx
- the environment to interact with the framework and masterregionInfo
-
IOException
void preBalance(ObserverContext<MasterCoprocessorEnvironment> ctx) throws IOException
ctx
- the environment to interact with the framework and master
IOException
void postBalance(ObserverContext<MasterCoprocessorEnvironment> ctx, List<RegionPlan> plans) throws IOException
ctx
- the environment to interact with the framework and masterplans
- the RegionPlans which master has executed. RegionPlan serves as hint
as for the final destination for the underlying region but may not represent the
final state of assignment
IOException
boolean preBalanceSwitch(ObserverContext<MasterCoprocessorEnvironment> ctx, boolean newValue) throws IOException
ctx
- the coprocessor instance's environmentnewValue
- the new flag value submitted in the call
IOException
void postBalanceSwitch(ObserverContext<MasterCoprocessorEnvironment> ctx, boolean oldValue, boolean newValue) throws IOException
ctx
- the coprocessor instance's environmentoldValue
- the previously set balanceSwitch valuenewValue
- the newly set balanceSwitch value
IOException
void preShutdown(ObserverContext<MasterCoprocessorEnvironment> ctx) throws IOException
HMaster
process.
IOException
void preStopMaster(ObserverContext<MasterCoprocessorEnvironment> ctx) throws IOException
HMaster
process.
IOException
void postStartMaster(ObserverContext<MasterCoprocessorEnvironment> ctx) throws IOException
IOException
void preSnapshot(ObserverContext<MasterCoprocessorEnvironment> ctx, HBaseProtos.SnapshotDescription snapshot, HTableDescriptor hTableDescriptor) throws IOException
ctx
- the environment to interact with the framework and mastersnapshot
- the SnapshotDescriptor for the snapshothTableDescriptor
- the hTableDescriptor of the table to snapshot
IOException
void postSnapshot(ObserverContext<MasterCoprocessorEnvironment> ctx, HBaseProtos.SnapshotDescription snapshot, HTableDescriptor hTableDescriptor) throws IOException
ctx
- the environment to interact with the framework and mastersnapshot
- the SnapshotDescriptor for the snapshothTableDescriptor
- the hTableDescriptor of the table to snapshot
IOException
void preCloneSnapshot(ObserverContext<MasterCoprocessorEnvironment> ctx, HBaseProtos.SnapshotDescription snapshot, HTableDescriptor hTableDescriptor) throws IOException
ctx
- the environment to interact with the framework and mastersnapshot
- the SnapshotDescriptor for the snapshothTableDescriptor
- the hTableDescriptor of the table to create
IOException
void postCloneSnapshot(ObserverContext<MasterCoprocessorEnvironment> ctx, HBaseProtos.SnapshotDescription snapshot, HTableDescriptor hTableDescriptor) throws IOException
ctx
- the environment to interact with the framework and mastersnapshot
- the SnapshotDescriptor for the snapshothTableDescriptor
- the hTableDescriptor of the table to create
IOException
void preRestoreSnapshot(ObserverContext<MasterCoprocessorEnvironment> ctx, HBaseProtos.SnapshotDescription snapshot, HTableDescriptor hTableDescriptor) throws IOException
ctx
- the environment to interact with the framework and mastersnapshot
- the SnapshotDescriptor for the snapshothTableDescriptor
- the hTableDescriptor of the table to restore
IOException
void postRestoreSnapshot(ObserverContext<MasterCoprocessorEnvironment> ctx, HBaseProtos.SnapshotDescription snapshot, HTableDescriptor hTableDescriptor) throws IOException
ctx
- the environment to interact with the framework and mastersnapshot
- the SnapshotDescriptor for the snapshothTableDescriptor
- the hTableDescriptor of the table to restore
IOException
void preDeleteSnapshot(ObserverContext<MasterCoprocessorEnvironment> ctx, HBaseProtos.SnapshotDescription snapshot) throws IOException
ctx
- the environment to interact with the framework and mastersnapshot
- the SnapshotDescriptor of the snapshot to delete
IOException
void postDeleteSnapshot(ObserverContext<MasterCoprocessorEnvironment> ctx, HBaseProtos.SnapshotDescription snapshot) throws IOException
ctx
- the environment to interact with the framework and mastersnapshot
- the SnapshotDescriptor of the snapshot to delete
IOException
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