How to listen to lifecycle events

Bundles have access to an instance of BundleContext that can be used to listen to different kinds of lifecycle events:

Bundle events are triggered by the runtime when the state of a bundle changes.
Framework events are triggered when the state of the runtime changes.
Service events are triggered when the state if a service changes.

Listening to bundle events

Using the addBundleListener method.

Listening for bundle events

import BundleEvent from "apprt/BundleEvent";
export default class {
    start(bundleContext) {
      this._bundleEventListenerHandle = bundleContext.addBundleListener(this._onBundleEvent, this);
    }

    stop(bundleContext) {
      bundleContext.removeBundleListener(this._bundleEventListenerHandle);
      this._bundleEventListenerHandle = null;
    }

    _onBundleEvent(evt) {
      if (BundleEvent.types.STARTED === evt.getType()) {
          let bundle = evt.getBundle();
      }
    }
}

Listening to framework events

The same approach can be used to register to framework events, by applying the addFrameworkListener method.

Listening for framework events

import FrameworkEvent from "apprt/launch/FrameworkEvent";
export default class {
    start(bundleContext) {
      this._frameworkEventListenerHandle = bundleContext.addFrameworkListener(this._onFrameworkEvent, this);
    }

    stop(bundleContext) {
      bundleContext.removeBundleListener(this._frameworkEventListenerHandle);
      this._frameworkEventListenerHandle = null;
    }

    _onFrameworkEvent(evt) {
      if (FrameworkEvent.types.STARTED === evt.getType()) {

      }
    }
}

Listening to service events

TBD