org.apache.hadoop.hbase.procedure2.store.wal

Class WALProcedureStore

java.lang.Object

org.apache.hadoop.hbase.procedure2.store.wal.WALProcedureStore

All Implemented Interfaces:

ProcedureStore

@InterfaceAudience.Private
@InterfaceStability.Evolving
public class WALProcedureStore
extends Object
implements ProcedureStore

WAL implementation of the ProcedureStore.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	WALProcedureStore.LeaseRecovery

Nested classes/interfaces inherited from interface org.apache.hadoop.hbase.procedure2.store.ProcedureStore

ProcedureStore.ProcedureStoreListener

Constructor Summary

Constructors

Constructor and Description
WALProcedureStore(org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.fs.FileSystem fs, org.apache.hadoop.fs.Path logDir, WALProcedureStore.LeaseRecovery leaseRecovery)

Method Summary

Methods

Modifier and Type	Method and Description
void	delete(long procId) The specified procId was removed from the executor, due to completion, abort or failure.
Set<ProcedureWALFile>	getCorruptedLogs()
org.apache.hadoop.fs.FileSystem	getFileSystem()
org.apache.hadoop.fs.Path	getLogDir()
protected org.apache.hadoop.fs.Path	getLogFilePath(long logId)
int	getNumThreads()
ProcedureStoreTracker	getStoreTracker()
void	insert(Procedure proc, Procedure[] subprocs) When a procedure is submitted to the executor insert(proc, null) will be called.
boolean	isRunning()
Iterator<Procedure>	load() Load the Procedures in the store.
void	recoverLease() Acquire the lease for the procedure store.
void	registerListener(ProcedureStore.ProcedureStoreListener listener) Add the listener to the notification list.
void	start(int numSlots) Start/Open the procedure store
void	stop(boolean abort) Stop/Close the procedure store
protected long	syncSlots(org.apache.hadoop.fs.FSDataOutputStream stream, ByteSlot[] slots, int offset, int count)
boolean	unregisterListener(ProcedureStore.ProcedureStoreListener listener) Remove the listener from the notification list.
void	update(Procedure proc) The specified procedure was executed, and the new state should be written to the store.

Methods inherited from class java.lang.Object

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

Constructor Detail

WALProcedureStore

public WALProcedureStore(org.apache.hadoop.conf.Configuration conf,
                 org.apache.hadoop.fs.FileSystem fs,
                 org.apache.hadoop.fs.Path logDir,
                 WALProcedureStore.LeaseRecovery leaseRecovery)

Method Detail

start

public void start(int numSlots)
           throws IOException

Description copied from interface: ProcedureStore

Start/Open the procedure store

Specified by:

start in interface ProcedureStore

Throws:

IOException

stop

public void stop(boolean abort)

Description copied from interface: ProcedureStore

Stop/Close the procedure store

Specified by:

stop in interface ProcedureStore

Parameters:

abort - true if the stop is an abort

isRunning

public boolean isRunning()

Specified by:

isRunning in interface ProcedureStore

Returns:

true if the store is running, otherwise false.

getNumThreads

public int getNumThreads()

Specified by:

getNumThreads in interface ProcedureStore

Returns:

the number of threads/slots passed to start()

getStoreTracker

public ProcedureStoreTracker getStoreTracker()

registerListener

public void registerListener(ProcedureStore.ProcedureStoreListener listener)

Description copied from interface: ProcedureStore

Add the listener to the notification list.

Specified by:

registerListener in interface ProcedureStore

Parameters:

listener - The AssignmentListener to register

unregisterListener

public boolean unregisterListener(ProcedureStore.ProcedureStoreListener listener)

Description copied from interface: ProcedureStore

Remove the listener from the notification list.

Specified by:

unregisterListener in interface ProcedureStore

Parameters:

listener - The AssignmentListener to unregister

Returns:

true if the listner was in the list and it was removed, otherwise false.

recoverLease

public void recoverLease()
                  throws IOException

Description copied from interface: ProcedureStore

Acquire the lease for the procedure store.

Specified by:

recoverLease in interface ProcedureStore

Throws:

IOException

load

public Iterator<Procedure> load()
                         throws IOException

Description copied from interface: ProcedureStore

Load the Procedures in the store.

Specified by:

load in interface ProcedureStore

Returns:

the set of procedures present in the store

Throws:

IOException

insert

public void insert(Procedure proc,
          Procedure[] subprocs)

Description copied from interface: ProcedureStore

When a procedure is submitted to the executor insert(proc, null) will be called. 'proc' has a 'RUNNABLE' state and the initial information required to start up. When a procedure is executed and it returns children insert(proc, subprocs) will be called. 'proc' has a 'WAITING' state and an update state. 'subprocs' are the children in 'RUNNABLE' state with the initial information.

Specified by:

insert in interface ProcedureStore

Parameters:

proc - the procedure to serialize and write to the store.

subprocs - the newly created child of the proc.

update

public void update(Procedure proc)

Description copied from interface: ProcedureStore

The specified procedure was executed, and the new state should be written to the store.

Specified by:

update in interface ProcedureStore

Parameters:

proc - the procedure to serialize and write to the store.

delete

public void delete(long procId)

Description copied from interface: ProcedureStore

The specified procId was removed from the executor, due to completion, abort or failure. The store implementor should remove all the information about the specified procId.

Specified by:

delete in interface ProcedureStore

Parameters:

procId - the ID of the procedure to remove.

syncSlots

protected long syncSlots(org.apache.hadoop.fs.FSDataOutputStream stream,
             ByteSlot[] slots,
             int offset,
             int count)
                  throws IOException

Throws:

IOException

getCorruptedLogs

public Set<ProcedureWALFile> getCorruptedLogs()

getLogDir

public org.apache.hadoop.fs.Path getLogDir()

getFileSystem

public org.apache.hadoop.fs.FileSystem getFileSystem()

getLogFilePath

protected org.apache.hadoop.fs.Path getLogFilePath(long logId)
                                            throws IOException

Throws:

IOException