Object which manages kernel instances for a given base url.


The manager is responsible for maintaining the state of kernel specs.


Implemented by


connectionFailure: ISignal<IManager, NetworkError>

A signal emitted when there is a connection failure.

disposed: ISignal<KernelSpec.IManager, void>

A signal emitted when the object is disposed.

isActive: boolean

Whether the manager is active.

isDisposed: boolean

Test whether the object has been disposed.


This property is always safe to access.

isReady: boolean

Whether the manager is ready.

ready: Promise<void>

A promise that resolves when the manager is initially ready.

serverSettings: ServerConnection.ISettings

The server settings for the manager.

The kernel spec models.


The value will be null until the manager is ready.

A signal emitted when the kernel specs change.


  • Dispose of the resources held by the object.


    If the object's dispose method is called more than once, all calls made after the first will be a no-op.

    Undefined Behavior

    It is undefined behavior to use any functionality of the object after it has been disposed unless otherwise explicitly noted.

    Returns void

  • Force a refresh of the specs from the server.

    Returns Promise<void>

    A promise that resolves when the specs are fetched.


    This is intended to be called only in response to a user action, since the manager maintains its internal state.

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