org.opendaylight.controller.cluster.datastore.persisted

Class ShardDataTreeSnapshotMetadata<T extends ShardDataTreeSnapshotMetadata<T>>

java.lang.Object

org.opendaylight.controller.cluster.datastore.persisted.ShardDataTreeSnapshotMetadata<T>

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

FrontendShardDataTreeSnapshotMetadata

public abstract class ShardDataTreeSnapshotMetadata<T extends ShardDataTreeSnapshotMetadata<T>>
extends Object
implements Serializable

Base class for various bits of metadata attached to a MetadataShardDataTreeSnapshot. This class is not an interface because we want to make sure all subclasses implement the externalizable proxy pattern, for which we need to force writeReplace() to be abstract. We do that by making it final and exposing a protected externalizableProxy() method.

All concrete subclasses of this class should be final so as to form a distinct set of possible metadata. Since metadata is serialized along with MetadataShardDataTreeSnapshot, this set is part of the serialization format guarded by PayloadVersion.

If a new metadata type is introduced or a type is removed, PayloadVersion needs to be bumped to ensure compatibility.

Author:

Robert Varga

See Also:

Serialized Form

Method Summary

Modifier and Type	Method and Description
protected abstract Externalizable	externalizableProxy() Return an Externalizable proxy.
abstract Class<T>	getType()

Methods inherited from class java.lang.Object

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

Method Detail

externalizableProxy

@Nonnull
protected abstract Externalizable externalizableProxy()

Return an Externalizable proxy.

Returns:

Externalizable proxy, may not be null

getType

public abstract Class<T> getType()