feat: add disabled lifecycle groups

Signed-off-by: Rifa Achrinza <[email protected]>

packages/core/src/__tests__/unit/lifecycle-registry.unit.ts

@@ -38,6 +38,14 @@ describe('LifeCycleRegistry', () => {
     expect(events).to.eql(['1-start', '2-start']);
   });
 
+  it('skips notification of disabled groups', async () => {
+    givenObserver('1', 'a');
+    givenObserver('2', 'b');
+    registry.setDisabledGroups(['a']);
+    await registry.start();
+    expect(events).to.eql(['2-start']);
+  });
+
   it('starts/stops all registered observers with param injections', async () => {
     givenObserverWithParamInjection('1');
     givenObserverWithParamInjection('2');
@@ -170,6 +178,10 @@ describe('LifeCycleRegistry', () => {
     setParallel(parallel?: boolean) {
       this.options.parallel = parallel;
     }
+
+    setDisabledGroups(groups?: string[]) {
+      this.options.disabledGroups = groups;
+    }
   }
 
   async function givenLifeCycleRegistry() {

packages/core/src/lifecycle-registry.ts

@@ -38,6 +38,12 @@ export type LifeCycleObserverOptions = {
    * observers are notified in the reverse order during `stop`.
    */
   orderedGroups: string[];
+  /**
+   * Override and disable lifecycle observer groups. This setting applies to
+   * both ordered groups (i.e. those defined in `orderedGroups`) and unordered
+   * groups.
+   */
+  disabledGroups?: string[];
   /**
    * Notify observers of the same group in parallel, default to `true`
    */
@@ -211,6 +217,10 @@ export class LifeCycleObserverRegistry implements LifeCycleObserver {
       groups = [...groups].reverse();
     }
     for (const group of groups) {
+      if (this.options.disabledGroups?.includes(group.group)) {
+        debug('Notification skipped (Group is disabled): %s', group.group);
+        continue;
+      }
       const observersForGroup: LifeCycleObserver[] = [];
       const bindingsInGroup = reverse
         ? group.bindings.reverse()