GrainStateWithMetaData<TView> Class

Definition

Namespace:

Orleans.EventSourcing.StateStorage

Assembly:

Orleans.EventSourcing.dll

Package:

Microsoft.Orleans.EventSourcing v9.0.0

A class that extends grain state with versioning metadata, so that a log-consistent grain can use a standard storage provider.

C#

[System.Serializable]
[Orleans.GenerateSerializer]
public sealed class GrainStateWithMetaData<TView> where TView : class, new()

Type Parameters

TView

Inheritance

Object

GrainStateWithMetaData<TView>

Attributes

SerializableAttribute GenerateSerializerAttribute

Constructors

GrainStateWithMetaData<TView>()	Initializes a new instance of the GrainStateWithMetaData<TView> class.
GrainStateWithMetaData<TView>(TView)	Initializes a new instance of the GrainStateWithMetaData<TView> class.

Properties

GlobalVersion	The length of the log
State	The stored view of the log
WriteVector	Metadata that is used to avoid duplicate appends. Logically, this is a (string->bit) map, the keys being replica ids But this map is represented compactly as a simple string to reduce serialization/deserialization overhead Bits are read by GetBit(String) and flipped by FlipBit(String). Bits are toggled when writing, so that the retry logic can avoid appending an entry twice when retrying a failed append.

Methods

FlipBit(String)	toggle one of the bits in WriteVector and return the new value.
GetBit(String)	Gets one of the bits in WriteVector

Applies to