[Response Ops][Alerting] Refactor ExecutionHandler stage 2 (#193807)

Resolves #186534

## Summary

This PR splits the for-loop in the `ActionScheduler.run` function into
the appropriate scheduler classes. Previously, each scheduler had a
`generateExecutables` function that would return an array of executables
and the `ActionScheduler` would loop through the array and convert the
executable to a scheduleable action depending on whether it was a
per-alert action, summary action or system action. This refactor renames
`generateExecutables` into `getActionsToSchedule` and moves the logic to
convert the executables into a schedulable action into the appropriate
scheduler class.

## To Verify

Create some rules with per-alert and summary and system actions and
verify they are triggered as expected.

---------

Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>

x-pack/plugins/actions/server/create_execute_function.test.ts

@@ -1088,6 +1088,7 @@ describe('bulkExecute()', () => {
             "actionTypeId": "mock-action",
             "id": "123",
             "response": "queuedActionsLimitError",
+            "uuid": undefined,
           },
         ],
       }
@@ -1099,4 +1100,93 @@ describe('bulkExecute()', () => {
       ]
     `);
   });
+
+  test('passes through action uuid if provided', async () => {
+    mockTaskManager.aggregate.mockResolvedValue({
+      took: 1,
+      timed_out: false,
+      _shards: { total: 1, successful: 1, skipped: 0, failed: 0 },
+      hits: { total: { value: 2, relation: 'eq' }, max_score: null, hits: [] },
+      aggregations: {},
+    });
+    mockActionsConfig.getMaxQueued.mockReturnValueOnce(3);
+    const executeFn = createBulkExecutionEnqueuerFunction({
+      taskManager: mockTaskManager,
+      actionTypeRegistry: actionTypeRegistryMock.create(),
+      isESOCanEncrypt: true,
+      inMemoryConnectors: [],
+      configurationUtilities: mockActionsConfig,
+      logger: mockLogger,
+    });
+    savedObjectsClient.bulkGet.mockResolvedValueOnce({
+      saved_objects: [
+        { id: '123', type: 'action', attributes: { actionTypeId: 'mock-action' }, references: [] },
+      ],
+    });
+    savedObjectsClient.bulkCreate.mockResolvedValueOnce({
+      saved_objects: [
+        { id: '234', type: 'action_task_params', attributes: { actionId: '123' }, references: [] },
+      ],
+    });
+    expect(
+      await executeFn(savedObjectsClient, [
+        {
+          id: '123',
+          params: { baz: false },
+          spaceId: 'default',
+          executionId: '123abc',
+          apiKey: null,
+          source: asHttpRequestExecutionSource(request),
+          actionTypeId: 'mock-action',
+          uuid: 'aaa',
+        },
+        {
+          id: '123',
+          params: { baz: false },
+          spaceId: 'default',
+          executionId: '456xyz',
+          apiKey: null,
+          source: asHttpRequestExecutionSource(request),
+          actionTypeId: 'mock-action',
+          uuid: 'bbb',
+        },
+      ])
+    ).toMatchInlineSnapshot(`
+      Object {
+        "errors": true,
+        "items": Array [
+          Object {
+            "actionTypeId": "mock-action",
+            "id": "123",
+            "response": "success",
+            "uuid": "aaa",
+          },
+          Object {
+            "actionTypeId": "mock-action",
+            "id": "123",
+            "response": "queuedActionsLimitError",
+            "uuid": "bbb",
+          },
+        ],
+      }
+    `);
+    expect(mockTaskManager.bulkSchedule).toHaveBeenCalledTimes(1);
+    expect(mockTaskManager.bulkSchedule.mock.calls[0]).toMatchInlineSnapshot(`
+      Array [
+        Array [
+          Object {
+            "params": Object {
+              "actionTaskParamsId": "234",
+              "spaceId": "default",
+            },
+            "scope": Array [
+              "actions",
+            ],
+            "state": Object {},
+            "taskType": "actions:mock-action",
+          },
+        ],
+      ]
+    `);
+  });
 });

x-pack/plugins/actions/server/create_execute_function.ts

@@ -31,6 +31,7 @@ interface CreateExecuteFunctionOptions {
 export interface ExecuteOptions
   extends Pick<ActionExecutorOptions, 'params' | 'source' | 'relatedSavedObjects' | 'consumer'> {
   id: string;
+  uuid?: string;
   spaceId: string;
   apiKey: string | null;
   executionId: string;
@@ -71,6 +72,7 @@ export interface ExecutionResponse {
 
 export interface ExecutionResponseItem {
   id: string;
+  uuid?: string;
   actionTypeId: string;
   response: ExecutionResponseType;
 }
@@ -197,12 +199,14 @@ export function createBulkExecutionEnqueuerFunction({
       items: runnableActions
         .map((a) => ({
           id: a.id,
+          uuid: a.uuid,
           actionTypeId: a.actionTypeId,
           response: ExecutionResponseType.SUCCESS,
         }))
         .concat(
           actionsOverLimit.map((a) => ({
             id: a.id,
+            uuid: a.uuid,
             actionTypeId: a.actionTypeId,
             response: ExecutionResponseType.QUEUED_ACTIONS_LIMIT_ERROR,
           }))

x-pack/plugins/alerting/server/lib/alerting_event_logger/alerting_event_logger.test.ts

@@ -807,6 +807,15 @@ describe('AlertingEventLogger', () => {
 
       expect(eventLogger.logEvent).toHaveBeenCalledWith(event);
     });
+
+    test('should log action event with uuid', () => {
+      alertingEventLogger.initialize({ context: ruleContext, runDate, ruleData });
+      alertingEventLogger.logAction({ ...action, uuid: 'abcdefg' });
+
+      const event = createActionExecuteRecord(ruleContext, ruleData, [alertSO], action);
+
+      expect(eventLogger.logEvent).toHaveBeenCalledWith(event);
+    });
   });
 
   describe('done()', () => {

x-pack/plugins/alerting/server/lib/alerting_event_logger/alerting_event_logger.ts

@@ -78,6 +78,9 @@ interface AlertOpts {
 
 export interface ActionOpts {
   id: string;
+  // uuid is typed as optional but in reality it is always
+  // populated - https://github.com/elastic/kibana/issues/195255
+  uuid?: string;
   typeId: string;
   alertId?: string;
   alertGroup?: string;