org.apache.hadoop.hbase.master.procedure

Class RestoreSnapshotProcedure

java.lang.Object

org.apache.hadoop.hbase.procedure2.Procedure<TEnvironment>

org.apache.hadoop.hbase.procedure2.StateMachineProcedure<MasterProcedureEnv,TState>

org.apache.hadoop.hbase.master.procedure.AbstractStateMachineTableProcedure<org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.RestoreSnapshotState>

org.apache.hadoop.hbase.master.procedure.RestoreSnapshotProcedure

All Implemented Interfaces:

Comparable<Procedure<MasterProcedureEnv>>, TableProcedureInterface

@InterfaceAudience.Private
public class RestoreSnapshotProcedure
extends AbstractStateMachineTableProcedure<org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.RestoreSnapshotState>

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.hbase.procedure2.StateMachineProcedure

StateMachineProcedure.Flow

Nested classes/interfaces inherited from class org.apache.hadoop.hbase.procedure2.Procedure

Procedure.LockState

Nested classes/interfaces inherited from interface org.apache.hadoop.hbase.master.procedure.TableProcedureInterface

TableProcedureInterface.TableOperationType

Field Summary

Fields

Modifier and Type	Field and Description
private static org.slf4j.Logger	LOG
private TableDescriptor	modifiedTableDescriptor
private MonitoredTask	monitorStatus
private Map<String,Pair<String,String>>	parentsToChildrenPairMap
private List<RegionInfo>	regionsToAdd
private List<RegionInfo>	regionsToRemove
private List<RegionInfo>	regionsToRestore
private boolean	restoreAcl
private org.apache.hadoop.hbase.shaded.protobuf.generated.SnapshotProtos.SnapshotDescription	snapshot
private Boolean	traceEnabled

Fields inherited from class org.apache.hadoop.hbase.procedure2.StateMachineProcedure

stateCount

Fields inherited from class org.apache.hadoop.hbase.procedure2.Procedure

NO_PROC_ID, NO_TIMEOUT

Constructor Summary

Constructors

Constructor and Description
RestoreSnapshotProcedure() Constructor (for failover)
RestoreSnapshotProcedure(MasterProcedureEnv env, TableDescriptor tableDescriptor, org.apache.hadoop.hbase.shaded.protobuf.generated.SnapshotProtos.SnapshotDescription snapshot)
RestoreSnapshotProcedure(MasterProcedureEnv env, TableDescriptor tableDescriptor, org.apache.hadoop.hbase.shaded.protobuf.generated.SnapshotProtos.SnapshotDescription snapshot, boolean restoreAcl) Constructor

Method Summary

Modifier and Type	Method and Description
boolean	abort(MasterProcedureEnv env) The abort() call is asynchronous and each procedure must decide how to deal with it, if they want to be abortable.
private void	addRegionsToInMemoryStates(List<RegionInfo> regionInfos, MasterProcedureEnv env, int regionReplication) Add regions to in-memory states
private void	deleteRegionsFromInMemoryStates(List<RegionInfo> regionInfos, MasterProcedureEnv env, int regionReplication) Delete regions from in-memory states
protected void	deserializeStateData(ProcedureStateSerializer serializer) Called on store load to allow the user to decode the previously serialized state.
protected StateMachineProcedure.Flow	executeFromState(MasterProcedureEnv env, org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.RestoreSnapshotState state) called to perform a single step of the specified 'state' of the procedure
protected org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.RestoreSnapshotState	getInitialState() Return the initial state object that will be used for the first call to executeFromState().
private MonitoredTask	getMonitorStatus() Set up monitor status if it is not created.
protected org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.RestoreSnapshotState	getState(int stateId) Convert an ordinal (or state id) to an Enum (or more descriptive) state object.
protected int	getStateId(org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.RestoreSnapshotState state) Convert the Enum (or more descriptive) state object to an ordinal (or state id).
TableName	getTableName()
TableProcedureInterface.TableOperationType	getTableOperationType() Given an operation type we can take decisions about what to do with pending operations.
protected boolean	isRollbackSupported(org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.RestoreSnapshotState state) Used by the default implementation of abort() to know if the current state can be aborted and rollback can be triggered.
private Boolean	isTraceEnabled() The procedure could be restarted from a different machine.
private void	prepareRestore(MasterProcedureEnv env) Action before any real action of restoring from snapshot.
private void	restoreSnapshot(MasterProcedureEnv env) Execute the on-disk Restore
private void	restoreSnapshotAcl(MasterProcedureEnv env)
protected void	rollbackState(MasterProcedureEnv env, org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.RestoreSnapshotState state) called to perform the rollback of the specified state
protected void	serializeStateData(ProcedureStateSerializer serializer) The user-level code of the procedure may have some state to persist (e.g.
void	toStringClassDetails(StringBuilder sb) Extend the toString() information with the procedure details e.g.
private void	updateMETA(MasterProcedureEnv env) Apply changes to hbase:meta
private void	updateTableDescriptor(MasterProcedureEnv env) Update descriptor

Methods inherited from class org.apache.hadoop.hbase.master.procedure.AbstractStateMachineTableProcedure

acquireLock, checkOnline, checkTableModifiable, getRegionDir, getUser, getWALRegionDir, preflightChecks, releaseLock, releaseSyncLatch, setUser, waitInitialized

Methods inherited from class org.apache.hadoop.hbase.procedure2.StateMachineProcedure

addChildProcedure, execute, failIfAborted, getCurrentState, getCurrentStateId, getCycles, isEofState, isYieldAfterExecutionStep, isYieldBeforeExecuteFromState, rollback, setNextState, toStringState

Methods inherited from class org.apache.hadoop.hbase.procedure2.Procedure

addStackIndex, afterReplay, beforeReplay, bypass, compareTo, completionCleanup, doExecute, doRollback, elapsedTime, getChildrenLatch, getException, getLastUpdate, getNonceKey, getOwner, getParentProcId, getProcedureMetrics, getProcId, getProcIdHashCode, getProcName, getResult, getRootProcedureId, getRootProcId, getStackIndexes, getState, getSubmittedTime, getTimeout, getTimeoutTimestamp, hasChildren, hasException, hasLock, hasOwner, hasParent, hasTimeout, haveSameParent, holdLock, incChildrenLatch, isBypass, isFailed, isFinished, isInitializing, isLockedWhenLoading, isRunnable, isSuccess, isWaiting, removeStackIndex, setAbortFailure, setChildrenLatch, setFailure, setFailure, setLastUpdate, setNonceKey, setOwner, setOwner, setParentProcId, setProcId, setResult, setRootProcId, setStackIndexes, setState, setSubmittedTime, setTimeout, setTimeoutFailure, shouldWaitClientAck, skipPersistence, toString, toStringClass, toStringDetails, toStringSimpleSB, updateMetricsOnFinish, updateMetricsOnSubmit, updateTimestamp, wasExecuted

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

LOG

private static final org.slf4j.Logger LOG

modifiedTableDescriptor

private TableDescriptor modifiedTableDescriptor

regionsToRestore

private List<RegionInfo> regionsToRestore

regionsToRemove

private List<RegionInfo> regionsToRemove

regionsToAdd

private List<RegionInfo> regionsToAdd

parentsToChildrenPairMap

private Map<String,Pair<String,String>> parentsToChildrenPairMap

snapshot

private org.apache.hadoop.hbase.shaded.protobuf.generated.SnapshotProtos.SnapshotDescription snapshot

restoreAcl

private boolean restoreAcl

monitorStatus

private MonitoredTask monitorStatus

traceEnabled

private Boolean traceEnabled

Constructor Detail

RestoreSnapshotProcedure

public RestoreSnapshotProcedure()

Constructor (for failover)

RestoreSnapshotProcedure

public RestoreSnapshotProcedure(MasterProcedureEnv env,
                                TableDescriptor tableDescriptor,
                                org.apache.hadoop.hbase.shaded.protobuf.generated.SnapshotProtos.SnapshotDescription snapshot)
                         throws HBaseIOException

Throws:

HBaseIOException

RestoreSnapshotProcedure

public RestoreSnapshotProcedure(MasterProcedureEnv env,
                                TableDescriptor tableDescriptor,
                                org.apache.hadoop.hbase.shaded.protobuf.generated.SnapshotProtos.SnapshotDescription snapshot,
                                boolean restoreAcl)
                         throws HBaseIOException

Constructor

Parameters:

env - MasterProcedureEnv

tableDescriptor - the table to operate on

snapshot - snapshot to restore from

Throws:

IOException

HBaseIOException

Method Detail

getMonitorStatus

private MonitoredTask getMonitorStatus()

Set up monitor status if it is not created.

executeFromState

protected StateMachineProcedure.Flow executeFromState(MasterProcedureEnv env,
                                                      org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.RestoreSnapshotState state)
                                               throws InterruptedException

Description copied from class: StateMachineProcedure

called to perform a single step of the specified 'state' of the procedure

Specified by:

executeFromState in class StateMachineProcedure<MasterProcedureEnv,org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.RestoreSnapshotState>

state - state to execute

Returns:

Flow.NO_MORE_STATE if the procedure is completed, Flow.HAS_MORE_STATE if there is another step.

Throws:

InterruptedException

rollbackState

protected void rollbackState(MasterProcedureEnv env,
                             org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.RestoreSnapshotState state)
                      throws IOException

Description copied from class: StateMachineProcedure

called to perform the rollback of the specified state

Specified by:

rollbackState in class StateMachineProcedure<MasterProcedureEnv,org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.RestoreSnapshotState>

state - state to rollback

Throws:

IOException - temporary failure, the rollback will retry later

isRollbackSupported

protected boolean isRollbackSupported(org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.RestoreSnapshotState state)

Description copied from class: StateMachineProcedure

Used by the default implementation of abort() to know if the current state can be aborted and rollback can be triggered.

Overrides:

isRollbackSupported in class StateMachineProcedure<MasterProcedureEnv,org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.RestoreSnapshotState>

getState

protected org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.RestoreSnapshotState getState(int stateId)

Description copied from class: StateMachineProcedure

Convert an ordinal (or state id) to an Enum (or more descriptive) state object.

Specified by:

getState in class StateMachineProcedure<MasterProcedureEnv,org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.RestoreSnapshotState>

Parameters:

stateId - the ordinal() of the state enum (or state id)

Returns:

the state enum object

getStateId

protected int getStateId(org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.RestoreSnapshotState state)

Description copied from class: StateMachineProcedure

Convert the Enum (or more descriptive) state object to an ordinal (or state id).

Specified by:

getStateId in class StateMachineProcedure<MasterProcedureEnv,org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.RestoreSnapshotState>

Parameters:

state - the state enum object

Returns:

stateId the ordinal() of the state enum (or state id)

getInitialState

protected org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.RestoreSnapshotState getInitialState()

Description copied from class: StateMachineProcedure

Return the initial state object that will be used for the first call to executeFromState().

Specified by:

getInitialState in class StateMachineProcedure<MasterProcedureEnv,org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.RestoreSnapshotState>

Returns:

the initial state enum object

getTableName

public TableName getTableName()

Specified by:

getTableName in interface TableProcedureInterface

Specified by:

getTableName in class AbstractStateMachineTableProcedure<org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.RestoreSnapshotState>

Returns:

the name of the table the procedure is operating on

getTableOperationType

public TableProcedureInterface.TableOperationType getTableOperationType()

Description copied from interface: TableProcedureInterface

Given an operation type we can take decisions about what to do with pending operations. e.g. if we get a delete and we have some table operation pending (e.g. add column) we can abort those operations.

Specified by:

getTableOperationType in interface TableProcedureInterface

Specified by:

getTableOperationType in class AbstractStateMachineTableProcedure<org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.RestoreSnapshotState>

Returns:

the operation type that the procedure is executing.

abort

public boolean abort(MasterProcedureEnv env)

Description copied from class: Procedure

The abort() call is asynchronous and each procedure must decide how to deal with it, if they want to be abortable. The simplest implementation is to have an AtomicBoolean set in the abort() method and then the execute() will check if the abort flag is set or not. abort() may be called multiple times from the client, so the implementation must be idempotent.

NOTE: abort() is not like Thread.interrupt(). It is just a notification that allows the procedure implementor abort.

Overrides:

abort in class StateMachineProcedure<MasterProcedureEnv,org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.RestoreSnapshotState>

toStringClassDetails

public void toStringClassDetails(StringBuilder sb)

Description copied from class: Procedure

Extend the toString() information with the procedure details e.g. className and parameters

Overrides:

toStringClassDetails in class AbstractStateMachineTableProcedure<org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.RestoreSnapshotState>

Parameters:

sb - the string builder to use to append the proc specific information

serializeStateData

protected void serializeStateData(ProcedureStateSerializer serializer)
                           throws IOException

Description copied from class: Procedure

The user-level code of the procedure may have some state to persist (e.g. input arguments or current position in the processing state) to be able to resume on failure.

Overrides:

serializeStateData in class StateMachineProcedure<MasterProcedureEnv,org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.RestoreSnapshotState>

Parameters:

serializer - stores the serializable state

Throws:

IOException

deserializeStateData

protected void deserializeStateData(ProcedureStateSerializer serializer)
                             throws IOException

Description copied from class: Procedure

Called on store load to allow the user to decode the previously serialized state.

Overrides:

deserializeStateData in class StateMachineProcedure<MasterProcedureEnv,org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.RestoreSnapshotState>

Parameters:

serializer - contains the serialized state

Throws:

IOException

prepareRestore

private void prepareRestore(MasterProcedureEnv env)
                     throws IOException

Action before any real action of restoring from snapshot.

Parameters:

env - MasterProcedureEnv

Throws:

IOException

updateTableDescriptor

private void updateTableDescriptor(MasterProcedureEnv env)
                            throws IOException

Update descriptor

Parameters:

env - MasterProcedureEnv

Throws:

IOException

restoreSnapshot

private void restoreSnapshot(MasterProcedureEnv env)
                      throws IOException

Execute the on-disk Restore

Parameters:

env - MasterProcedureEnv

Throws:

IOException

updateMETA

private void updateMETA(MasterProcedureEnv env)
                 throws IOException

Apply changes to hbase:meta

Parameters:

env - MasterProcedureEnv

Throws:

IOException

deleteRegionsFromInMemoryStates

private void deleteRegionsFromInMemoryStates(List<RegionInfo> regionInfos,
                                             MasterProcedureEnv env,
                                             int regionReplication)

Delete regions from in-memory states

Parameters:

regionInfos - regions to delete

env - MasterProcedureEnv

regionReplication - the number of region replications

addRegionsToInMemoryStates

private void addRegionsToInMemoryStates(List<RegionInfo> regionInfos,
                                        MasterProcedureEnv env,
                                        int regionReplication)

Add regions to in-memory states

Parameters:

regionInfos - regions to add

env - MasterProcedureEnv

regionReplication - the number of region replications

restoreSnapshotAcl

private void restoreSnapshotAcl(MasterProcedureEnv env)
                         throws IOException

Throws:

IOException

isTraceEnabled

private Boolean isTraceEnabled()

The procedure could be restarted from a different machine. If the variable is null, we need to retrieve it.

Returns:

traceEnabled