LogStateWithMetaData<TEntry> Class

Definition

Namespace:

Orleans.EventSourcing.LogStorage

Assembly:

Orleans.EventSourcing.dll

Package:

Microsoft.Orleans.EventSourcing v8.1.0

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

[System.Serializable]
[Orleans.GenerateSerializer]
public sealed class LogStateWithMetaData<TEntry> where TEntry : class

[<System.Serializable>]
[<Orleans.GenerateSerializer>]
type LogStateWithMetaData<'Entry (requires 'Entry : null)> = class

Public NotInheritable Class LogStateWithMetaData(Of TEntry)

Type Parameters

TEntry

Inheritance

Object

LogStateWithMetaData<TEntry>

Attributes

SerializableAttribute GenerateSerializerAttribute

Constructors

LogStateWithMetaData<TEntry>()

Initializes a new instance of the LogStateWithMetaData<TEntry> class.

Properties

GlobalVersion	The length of the log
Log	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