org.apache.hadoop.hbase.procedure2.store

Class NoopProcedureStore

java.lang.Object

org.apache.hadoop.hbase.procedure2.store.ProcedureStoreBase

org.apache.hadoop.hbase.procedure2.store.NoopProcedureStore

All Implemented Interfaces:

ProcedureStore

@InterfaceAudience.Private
public class NoopProcedureStore
extends ProcedureStoreBase

An In-Memory store that does not keep track of the procedures inserted.

Nested Class Summary

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

ProcedureStore.ProcedureIterator, ProcedureStore.ProcedureLoader, ProcedureStore.ProcedureStoreListener

Field Summary

Fields

Modifier and Type	Field and Description
private int	numThreads

Constructor Summary

Constructors

Constructor and Description
NoopProcedureStore()

Method Summary

Modifier and Type	Method and Description
void	delete(long procId) The specified procId was removed from the executor, due to completion, abort or failure.
void	delete(long[] procIds, int offset, int count) The specified procIds were removed from the executor, due to completion, abort or failure.
void	delete(Procedure<?> proc, long[] subprocs) The parent procedure completed.
int	getNumThreads() Returns the number of threads/slots passed to start()
void	insert(Procedure<?>[] proc) Serialize a set of new procedures.
void	insert(Procedure<?> proc, Procedure<?>[] subprocs) When a procedure is submitted to the executor insert(proc, null) will be called.
void	load(ProcedureStore.ProcedureLoader loader) Load the Procedures in the store.
void	recoverLease() Acquire the lease for the procedure store.
int	setRunningProcedureCount(int count) Set the number of procedure running.
void	start(int numThreads) Start/Open the procedure store
void	stop(boolean abort) Stop/Close the procedure store
void	update(Procedure<?> proc) The specified procedure was executed, and the new state should be written to the store.

Methods inherited from class org.apache.hadoop.hbase.procedure2.store.ProcedureStoreBase

isRunning, registerListener, sendAbortProcessSignal, sendForceUpdateSignal, sendPostSyncSignal, setRunning, unregisterListener

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.hadoop.hbase.procedure2.store.ProcedureStore

cleanup

Field Detail

numThreads

private int numThreads

Constructor Detail

NoopProcedureStore

public NoopProcedureStore()

Method Detail

start

public void start(int numThreads)
           throws IOException

Description copied from interface: ProcedureStore

Start/Open the procedure store

Parameters:

numThreads - number of threads to be used by the procedure store

Throws:

IOException

stop

public void stop(boolean abort)

Description copied from interface: ProcedureStore

Stop/Close the procedure store

Parameters:

abort - true if the stop is an abort

recoverLease

public void recoverLease()
                  throws IOException

Description copied from interface: ProcedureStore

Acquire the lease for the procedure store.

Throws:

IOException

getNumThreads

public int getNumThreads()

Description copied from interface: ProcedureStore

Returns the number of threads/slots passed to start()

setRunningProcedureCount

public int setRunningProcedureCount(int count)

Description copied from interface: ProcedureStore

Set the number of procedure running. This can be used, for example, by the store to know how long to wait before a sync.

Returns:

how many procedures are running (may not be same as count).

load

public void load(ProcedureStore.ProcedureLoader loader)
          throws IOException

Description copied from interface: ProcedureStore

Load the Procedures in the store.

Parameters:

loader - the ProcedureLoader that will handle the store-load events

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.

Parameters:

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

subprocs - the newly created child of the proc.

insert

public void insert(Procedure<?>[] proc)

Description copied from interface: ProcedureStore

Serialize a set of new procedures. These procedures are freshly submitted to the executor and each procedure has a 'RUNNABLE' state and the initial information required to start up.

Parameters:

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

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.

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.

Parameters:

procId - the ID of the procedure to remove.

delete

public void delete(Procedure<?> proc,
                   long[] subprocs)

Description copied from interface: ProcedureStore

The parent procedure completed. Update the state and mark all the child deleted.

Parameters:

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

subprocs - the IDs of the sub-procedure to remove.

delete

public void delete(long[] procIds,
                   int offset,
                   int count)

Description copied from interface: ProcedureStore

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

Parameters:

procIds - the IDs of the procedures to remove.

offset - the array offset from where to start to delete

count - the number of IDs to delete