edu.umass.cs.reconfiguration.interfaces

Interface RequestType

All Superinterfaces:

IntegerPacketType, IntegerType

public interface RequestType
extends IntegerPacketType

Author:

arun

Method Summary

Modifier and Type	Method and Description
default boolean	isNonLocal()
default boolean	isTransaction()
default boolean	needsCoordination()
default RequestType[]	subRequests()

Methods inherited from interface edu.umass.cs.utils.IntegerType

getInt

Method Detail

needsCoordination

default boolean needsCoordination()

Returns:

True if requests of this type, by default, need to be coordinated or are meant to be executed locally.

isNonLocal

default boolean isNonLocal()

Returns:

True if this request needs to contact another active replica in order to complete execution. This flag is different from needsCoordination() above in that the former implies a statically determined replica coordination protocol while this method may involve, say, looking up or writing to a some remote data in a manner specific to executing this request.

subRequests

default RequestType[] subRequests()

Returns:

The array of requests that are executed (in order) in order to execute this request. A member of the returned array may itself return a non-null set when subRequests() is invoked upon it. A primitive request, i.e., one with no sub-requests, may return either null or an empty array.

isTransaction

default boolean isTransaction()

Returns:

True if subRequests() returns a nonempty array of requests all of which must be executed as a transaction, i.e., with atomicity and isolation. Note that the "C" and "D" in ACID are properties of the replica coordination protocol, so isTransaction() does not imply durability.