Class FlagValueChangeEvent

A parameter class used with FlagValueChangeHandler(String, Context, EventHandler<FlagValueChangeEvent>).

Inheritance

System.Object

FlagValueChangeEvent

Namespace: LaunchDarkly.Sdk.Server.Interfaces

Assembly: LaunchDarkly.ServerSdk.dll

Syntax

public sealed class FlagValueChangeEvent : ValueType

Remarks

This is not an analytics event to be sent to LaunchDarkly; it is a notification to the application.

Constructors

FlagValueChangeEvent(String, LdValue, LdValue)

Constructs a new instance.

Declaration

public FlagValueChangeEvent(string key, LdValue oldValue, LdValue newValue)

Parameters

Type	Name	Description
System.String	key	the key of the feature flag whose configuration has changed
LdValue	oldValue	he last known value of the flag for the specified user prior to the update
LdValue	newValue	he new value of the flag for the specified user

Properties

Key

The key of the feature flag whose configuration has changed.

Declaration

public string Key { get; }

Property Value

Type	Description
System.String

Remarks

The specified flag may have been modified directly, or this may be an indirect change due to a change in some other flag that is a prerequisite for this flag, or a user segment that is referenced in the flag's rules.

NewValue

The new value of the flag for the specified user.

Declaration

public LdValue NewValue { get; }

Property Value

Type	Description
LdValue

Remarks

Since flag values can be of any JSON data type, this is represented as LdValue. That class has properties for converting to other .NET types, such as AsBool.

If the flag was deleted or could not be evaluated, this will be Null. there is no application default value parameter as there is for the Variation methods; it is up to your code to substitute whatever fallback value is appropriate.

OldValue

The last known value of the flag for the specified user prior to the update.

Declaration

public LdValue OldValue { get; }

Property Value

Type	Description
LdValue

Remarks

Since flag values can be of any JSON data type, this is represented as LdValue. That class has properties for converting to other .NET types, such as AsBool.

If the flag was deleted or could not be evaluated, this will be Null. there is no application default value parameter as there is for the Variation methods; it is up to your code to substitute whatever fallback value is appropriate.