Class Update

Send this message to the local Akka.DistributedData.Replicator to update a data value for the given Key. The Akka.DistributedData.Replicator will reply with one of the IUpdateResponse messages.

The current data value for the Key is passed as parameter to the Modify function. It is null if there is no value for the Key, and otherwise Request. The function is supposed to return the new value of the data, which will then be replicated according to the given IWriteConsistency.

The Modify function is called by the <xref href="Akka.DistributedData.Replicator" data-throw-if-not-resolved="false"></xref> actor and must therefore be a pure function that only uses the data parameter and stable fields from enclosing scope. It must for example not access sender() reference of an enclosing actor.

Inheritance
Object
Update
Implements
Inherited Members
Namespace: Akka.DistributedData
Assembly: Akka.DistributedData.dll
Syntax
[Serializable]
public sealed class Update : INoSerializationVerificationNeeded

Constructors

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Update(IKey, IReplicatedData, IWriteConsistency, Func<IReplicatedData, IReplicatedData>, Object)

Modify value of local Akka.DistributedData.Replicator and replicate with given IWriteConsistency.

The current value for the Key is passed to the Modify function. If there is no current data value for the Key the initial value will be passed to the Modify function.

The optional request context is included in the reply messages. This is a convenient way to pass contextual information (e.g. original sender) without having to use ask or local correlation data structures.

Declaration
public Update(IKey key, IReplicatedData initial, IWriteConsistency consistency, Func<IReplicatedData, IReplicatedData> modify, object request = null)
Parameters
Type Name Description
IKey key
IReplicatedData initial
IWriteConsistency consistency
Func<IReplicatedData, IReplicatedData> modify
Object request
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Update(IKey, IWriteConsistency, Func<IReplicatedData, IReplicatedData>, Object)

Declaration
public Update(IKey key, IWriteConsistency consistency, Func<IReplicatedData, IReplicatedData> modify, object request = null)
Parameters
Type Name Description
IKey key
IWriteConsistency consistency
Func<IReplicatedData, IReplicatedData> modify
Object request

Properties

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Consistency

Declaration
public IWriteConsistency Consistency { get; }
Property Value
Type Description
IWriteConsistency
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Key

Declaration
public IKey Key { get; }
Property Value
Type Description
IKey
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Modify

Declaration
public Func<IReplicatedData, IReplicatedData> Modify { get; }
Property Value
Type Description
Func<IReplicatedData, IReplicatedData>
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Request

Declaration
public object Request { get; }
Property Value
Type Description
Object

Methods

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ToString()

Declaration
public override string ToString()
Returns
Type Description
String
Overrides

Implements

Extension Methods