org.apache.hadoop.hbase.procedure2

Class ProcedureUtil

java.lang.Object

org.apache.hadoop.hbase.procedure2.ProcedureUtil

@InterfaceAudience.Private
public final class ProcedureUtil
extends Object

Helper to convert to/from ProcedureProtos

Method Summary

Modifier and Type	Method and Description
static Procedure<?>	convertToProcedure(ProcedureProtos.Procedure proto) Helper to convert the protobuf procedure.
static LockServiceProtos.LockedResource	convertToProtoLockedResource(LockedResource lockedResource)
static LockServiceProtos.LockType	convertToProtoLockType(LockType lockType)
static ProcedureProtos.Procedure	convertToProtoProcedure(Procedure<?> proc) Helper to convert the procedure to protobuf.
static LockServiceProtos.LockedResourceType	convertToProtoResourceType(LockedResourceType resourceType)
static long	getBackoffTimeMs(int attempts) Get an exponential backoff time, in milliseconds.

Methods inherited from class java.lang.Object

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

Method Detail

convertToProtoProcedure

public static ProcedureProtos.Procedure convertToProtoProcedure(Procedure<?> proc)
                                                         throws IOException

Helper to convert the procedure to protobuf.

Used by ProcedureStore implementations.

Throws:

IOException

convertToProcedure

public static Procedure<?> convertToProcedure(ProcedureProtos.Procedure proto)
                                       throws IOException

Helper to convert the protobuf procedure.

Used by ProcedureStore implementations.

TODO: OPTIMIZATION: some of the field never change during the execution (e.g. className, procId, parentId, ...). We can split in 'data' and 'state', and the store may take advantage of it by storing the data only on insert().

Throws:

IOException

convertToProtoResourceType

public static LockServiceProtos.LockedResourceType convertToProtoResourceType(LockedResourceType resourceType)

convertToProtoLockType

public static LockServiceProtos.LockType convertToProtoLockType(LockType lockType)

convertToProtoLockedResource

public static LockServiceProtos.LockedResource convertToProtoLockedResource(LockedResource lockedResource)
                                                                     throws IOException

Throws:

IOException

getBackoffTimeMs

public static long getBackoffTimeMs(int attempts)

Get an exponential backoff time, in milliseconds. The base unit is 1 second, and the max backoff time is 10 minutes. This is the general backoff policy for most procedure implementation.