software.amazon.kinesis.coordinator.migration

Class MigrationClientVersionStateInitializer

java.lang.Object

software.amazon.kinesis.coordinator.migration.MigrationClientVersionStateInitializer

@ThreadSafe
public class MigrationClientVersionStateInitializer
extends Object

Initializer to determine start state of the state machine which identifies the state to initialize KCL when it is starting up. The initial state is determined based on the customer configured CoordinatorConfig.ClientVersionConfig and the current MigrationState in DDB, as follows ClientVersionConfig | MigrationState (DDB) | initial client version --------------------+---------------------------------+-------------------------------- COMPATIBLE_WITH_2X | Does not exist | CLIENT_VERSION_UPGRADE_FROM_2X 3X | Does not exist | CLIENT_VERSION_3X COMPATIBLE_WITH_2X | CLIENT_VERSION_3X_WITH_ROLLBACK | CLIENT_VERSION_3X_WITH_ROLLBACK 3X | CLIENT_VERSION_3X_WITH_ROLLBACK | CLIENT_VERSION_3X any | CLIENT_VERSION_2X | CLIENT_VERSION_2X any | CLIENT_VERSION_UPGRADE_FROM_2X | CLIENT_VERSION_UPGRADE_FROM_2X any | CLIENT_VERSION_3X | CLIENT_VERSION_3X

Constructor Summary

Constructors

Constructor and Description
MigrationClientVersionStateInitializer()

Method Summary

Modifier and Type	Method and Description
ClientVersion	getClientVersionForInitialization(MigrationState migrationState)
AbstractMap.SimpleEntry<ClientVersion,MigrationState>	getInitialState()

Methods inherited from class java.lang.Object

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

Constructor Detail

MigrationClientVersionStateInitializer

public MigrationClientVersionStateInitializer()

Method Detail

getInitialState

public AbstractMap.SimpleEntry<ClientVersion,MigrationState> getInitialState()
                                                                      throws DependencyException

Throws:

DependencyException

getClientVersionForInitialization

public ClientVersion getClientVersionForInitialization(MigrationState migrationState)