Package software.xdev.micromigration.microstream.versionagnostic

Class VersionAgnosticMigrationManager<T>

java.lang.Object

software.xdev.micromigration.microstream.versionagnostic.VersionAgnosticMigrationManager<T>

Type Parameters:

T - The actually used MicroStream EmbeddedStorageManager

public class VersionAgnosticMigrationManager<T>
extends java.lang.Object

Manages a given object and keeps the version for it.

Can be used to keep the version of the MicroStream-Root-Object and therefor keep the whole datastore versioned.

VersionAgnostic because it should be independent from the actual MicroStream implementation used.

Author:

Johannes Rabauer

Constructor Summary

Constructors

Constructor	Description
VersionAgnosticMigrationManager(java.util.function.Supplier<MigrationVersion> currentVersionGetter, java.util.function.Consumer<MigrationVersion> currentVersionSetter, java.util.function.Consumer<MigrationVersion> currentVersionStorer, MicroMigrater migrater, VersionAgnosticMigrationEmbeddedStorageManager<?,T> storageManager)	Much more complicated constructor than VersionAgnosticMigrationManager(software.xdev.micromigration.version.Versioned,software.xdev.micromigration.migrater.MicroMigrater,software.xdev.micromigration.microstream.versionagnostic.VersionAgnosticMigrationEmbeddedStorageManager<?,T>).
VersionAgnosticMigrationManager(VersionedAndKeeperOfHistory versionedObject, MicroMigrater migrater, VersionAgnosticMigrationEmbeddedStorageManager<?,T> storageManager)	Simple Constructor.
VersionAgnosticMigrationManager(Versioned versionedObject, MicroMigrater migrater, VersionAgnosticMigrationEmbeddedStorageManager<?,T> storageManager)	Simple Constructor.

Method Summary

Modifier and Type	Method	Description
void	migrate(java.lang.Object objectToMigrate)	Migrates the given object to the newest possible version, defined by the MicroMigrater.

Methods inherited from class java.lang.Object

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

Constructor Detail

VersionAgnosticMigrationManager

public VersionAgnosticMigrationManager(java.util.function.Supplier<MigrationVersion> currentVersionGetter,
                                       java.util.function.Consumer<MigrationVersion> currentVersionSetter,
                                       java.util.function.Consumer<MigrationVersion> currentVersionStorer,
                                       MicroMigrater migrater,
                                       VersionAgnosticMigrationEmbeddedStorageManager<?,T> storageManager)

Much more complicated constructor than VersionAgnosticMigrationManager(software.xdev.micromigration.version.Versioned,software.xdev.micromigration.migrater.MicroMigrater,software.xdev.micromigration.microstream.versionagnostic.VersionAgnosticMigrationEmbeddedStorageManager<?,T>).

Parameters:

currentVersionGetter - which supplies the current version of the object to update.

currentVersionSetter - which sets the new version of the object in some membervariable. This Consumer is not supposed to store the version, but only save it in some membervariable to be stored after.

currentVersionStorer - which is supposed to store the new version of the object somewhere in the datastore.

migrater - does the actual migration with the given VersionAgnosticMigrationScript

storageManager - for the VersionAgnosticMigrationScripts to use. Is not used for the storing of the new version.

VersionAgnosticMigrationManager

public VersionAgnosticMigrationManager(Versioned versionedObject,
                                       MicroMigrater migrater,
                                       VersionAgnosticMigrationEmbeddedStorageManager<?,T> storageManager)

Simple Constructor.

Parameters:

versionedObject - which provides getter and setter for the current version. This object will be stored after the VersionAgnosticMigrationScripts are executed.

migrater - does the actual migration with the given VersionAgnosticMigrationScript

storageManager - for the VersionAgnosticMigrationScripts to use. Is not used for the storing of the new version.

VersionAgnosticMigrationManager

public VersionAgnosticMigrationManager(VersionedAndKeeperOfHistory versionedObject,
                                       MicroMigrater migrater,
                                       VersionAgnosticMigrationEmbeddedStorageManager<?,T> storageManager)

Simple Constructor.

Parameters:

versionedObject - which provides getter and setter for the current version. This object will be stored after the VersionAgnosticMigrationScripts are executed.

migrater - does the actual migration with the given VersionAgnosticMigrationScript

storageManager - for the VersionAgnosticMigrationScripts to use. Is not used for the storing of the new version.

Method Detail

migrate

public void migrate(java.lang.Object objectToMigrate)

Migrates the given object to the newest possible version, defined by the MicroMigrater.

Parameters:

objectToMigrate - is given to the MicroMigrater for migrating upon