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

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private static class	ProcedureUtil.CompatStateSerializer A serializer (deserializer) for those Procedures which were serialized before this patch.
private static class	ProcedureUtil.StateSerializer A serializer for our Procedures.

Constructor Summary

Constructors

Modifier	Constructor and Description
private	ProcedureUtil()

Method Summary

Modifier and Type	Method and Description
static Procedure<?>	convertToProcedure(org.apache.hadoop.hbase.shaded.protobuf.generated.ProcedureProtos.Procedure proto) Helper to convert the protobuf procedure.
static org.apache.hadoop.hbase.shaded.protobuf.generated.LockServiceProtos.LockedResource	convertToProtoLockedResource(LockedResource lockedResource)
static org.apache.hadoop.hbase.shaded.protobuf.generated.LockServiceProtos.LockType	convertToProtoLockType(LockType lockType)
static org.apache.hadoop.hbase.shaded.protobuf.generated.ProcedureProtos.Procedure	convertToProtoProcedure(Procedure<?> proc) Helper to convert the procedure to protobuf.
static org.apache.hadoop.hbase.shaded.protobuf.generated.LockServiceProtos.LockedResourceType	convertToProtoResourceType(LockedResourceType resourceType)
static long	getBackoffTimeMs(int attempts) Get an exponential backoff time, in milliseconds.
private static Procedure<?>	newProcedure(String className)
(package private) static void	validateClass(Procedure<?> proc)

Methods inherited from class java.lang.Object

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

Constructor Detail

ProcedureUtil

private ProcedureUtil()

Method Detail

newProcedure

private static Procedure<?> newProcedure(String className)
                                  throws BadProcedureException

Throws:

BadProcedureException

validateClass

static void validateClass(Procedure<?> proc)
                   throws BadProcedureException

Throws:

BadProcedureException

convertToProtoProcedure

public static org.apache.hadoop.hbase.shaded.protobuf.generated.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(org.apache.hadoop.hbase.shaded.protobuf.generated.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 org.apache.hadoop.hbase.shaded.protobuf.generated.LockServiceProtos.LockedResourceType convertToProtoResourceType(LockedResourceType resourceType)

convertToProtoLockType

public static org.apache.hadoop.hbase.shaded.protobuf.generated.LockServiceProtos.LockType convertToProtoLockType(LockType lockType)

convertToProtoLockedResource

public static org.apache.hadoop.hbase.shaded.protobuf.generated.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.