RemoteConfigMiddleware class

Middleware that injects remote configuration values into worker configs at execution time.

Use this to control worker behaviour dynamically at runtime — no app update required. Values can come from any source: Firebase Remote Config, AWS AppConfig, LaunchDarkly, or a plain REST endpoint.

Usage

// 1. Fetch values from your config source (e.g. Firebase Remote Config)
final rc = FirebaseRemoteConfig.instance;
await rc.fetchAndActivate();

// 2. Register middleware once at startup (or refresh on config change)
await NativeWorkManager.registerMiddleware(
  RemoteConfigMiddleware(
    values: {
      'timeout': rc.getInt('download_timeout_seconds'),
      'maxRetries': rc.getInt('max_retries'),
    },
    workerType: 'HttpDownload', // optional: only targets HttpDownloadWorker
  ),
);

To refresh the config (e.g. after a Remote Config fetch), simply call registerMiddleware again with updated values — the native side replaces the previous entry for the remoteConfig type.

How it works

Each key in values is injected directly into the native worker config map, overriding any existing value with the same name. If workerType is provided, the middleware only applies to workers whose class name contains that string (case-insensitive substring match).

Inheritance

Constructors

RemoteConfigMiddleware({required Map<String, dynamic> values, String? workerType})
const

Properties

hashCode → int
The hash code for this object.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
values → Map<String, dynamic>
Config values to inject into matching worker configurations.
final
workerType → String?
Optional worker class name filter (case-insensitive substring match).
final

Methods

noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toMap() → Map<String, dynamic>
Convert to map for platform channel.
override
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited