feat(core): Support bidirectional communication between specific main…

…s and specific workers (#10377)
n8n-io · Aug 26, 2024 · 17f741d · 17f741d
1 parent d2bbfa0
commit 17f741d
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Showing 7 changed files with 57 additions and 25 deletions.
diff --git a/packages/cli/src/commands/start.ts b/packages/cli/src/commands/start.ts
@@ -239,7 +239,10 @@ export class Start extends BaseCommand {
 
 		await orchestrationService.init();
 
-		await Container.get(OrchestrationHandlerMainService).init();
+		await Container.get(OrchestrationHandlerMainService).initWithOptions({
+			queueModeId: this.queueModeId,
+			redisPublisher: Container.get(OrchestrationService).redisPublisher,
+		});
 
 		if (!orchestrationService.isMultiMainSetupEnabled) return;
 

diff --git a/packages/cli/src/services/__tests__/orchestration.service.test.ts b/packages/cli/src/services/__tests__/orchestration.service.test.ts
@@ -19,6 +19,7 @@ import { Push } from '@/push';
 import { ActiveWorkflowManager } from '@/ActiveWorkflowManager';
 import { mockInstance } from '@test/mocking';
 import { RedisClientService } from '@/services/redis/redis-client.service';
+import type { MainResponseReceivedHandlerOptions } from '../orchestration/main/types';
 
 const instanceSettings = Container.get(InstanceSettings);
 const redisClientService = mockInstance(RedisClientService);
@@ -96,8 +97,9 @@ describe('Orchestration Service', () => {
 	test('should handle worker responses', async () => {
 		const response = await handleWorkerResponseMessageMain(
 			JSON.stringify(workerRestartEventBusResponse),
+			mock<MainResponseReceivedHandlerOptions>(),
 		);
-		expect(response.command).toEqual('restartEventBus');
+		expect(response?.command).toEqual('restartEventBus');
 	});
 
 	test('should handle command messages from others', async () => {

diff --git a/packages/cli/src/services/orchestration.handler.base.service.ts b/packages/cli/src/services/orchestration.handler.base.service.ts
@@ -2,6 +2,7 @@ import Container from 'typedi';
 import { RedisService } from './redis.service';
 import type { RedisServicePubSubSubscriber } from './redis/RedisServicePubSubSubscriber';
 import type { WorkerCommandReceivedHandlerOptions } from './orchestration/worker/types';
+import type { MainResponseReceivedHandlerOptions } from './orchestration/main/types';
 
 export abstract class OrchestrationHandlerService {
 	protected initialized = false;
@@ -19,7 +20,9 @@ export abstract class OrchestrationHandlerService {
 		this.initialized = true;
 	}
 
-	async initWithOptions(options: WorkerCommandReceivedHandlerOptions) {
+	async initWithOptions(
+		options: WorkerCommandReceivedHandlerOptions | MainResponseReceivedHandlerOptions,
+	) {
 		await this.initSubscriber(options);
 		this.initialized = true;
 	}
@@ -29,5 +32,7 @@ export abstract class OrchestrationHandlerService {
 		this.initialized = false;
 	}
 
-	protected abstract initSubscriber(options?: WorkerCommandReceivedHandlerOptions): Promise<void>;
+	protected abstract initSubscriber(
+		options?: WorkerCommandReceivedHandlerOptions | MainResponseReceivedHandlerOptions,
+	): Promise<void>;
 }
diff --git a/packages/cli/src/services/orchestration/main/handleWorkerResponseMessageMain.ts b/packages/cli/src/services/orchestration/main/handleWorkerResponseMessageMain.ts
@@ -3,25 +3,40 @@ import Container from 'typedi';
 import { Logger } from '@/Logger';
 import { Push } from '../../../push';
 import type { RedisServiceWorkerResponseObject } from '../../redis/RedisServiceCommands';
+import { WORKER_RESPONSE_REDIS_CHANNEL } from '@/services/redis/RedisConstants';
+import type { MainResponseReceivedHandlerOptions } from './types';
 
-export async function handleWorkerResponseMessageMain(messageString: string) {
-	const workerResponse = jsonParse<RedisServiceWorkerResponseObject>(messageString);
-	if (workerResponse) {
-		switch (workerResponse.command) {
-			case 'getStatus':
-				const push = Container.get(Push);
-				push.broadcast('sendWorkerStatusMessage', {
-					workerId: workerResponse.workerId,
-					status: workerResponse.payload,
-				});
-				break;
-			case 'getId':
-				break;
-			default:
-				Container.get(Logger).debug(
-					`Received worker response ${workerResponse.command} from ${workerResponse.workerId}`,
-				);
-		}
+export async function handleWorkerResponseMessageMain(
+	messageString: string,
+	options: MainResponseReceivedHandlerOptions,
+) {
+	const workerResponse = jsonParse<RedisServiceWorkerResponseObject | null>(messageString, {
+		fallbackValue: null,
+	});
+
+	if (!workerResponse) {
+		Container.get(Logger).debug(
+			`Received invalid message via channel ${WORKER_RESPONSE_REDIS_CHANNEL}: "${messageString}"`,
+		);
+		return;
 	}
+
+	if (workerResponse.targets && !workerResponse.targets.includes(options.queueModeId)) return;
+
+	switch (workerResponse.command) {
+		case 'getStatus':
+			Container.get(Push).broadcast('sendWorkerStatusMessage', {
+				workerId: workerResponse.workerId,
+				status: workerResponse.payload,
+			});
+			break;
+		case 'getId':
+			break;
+		default:
+			Container.get(Logger).debug(
+				`Received worker response ${workerResponse.command} from ${workerResponse.workerId}`,
+			);
+	}
+
 	return workerResponse;
 }
diff --git a/packages/cli/src/services/orchestration/main/orchestration.handler.main.service.ts b/packages/cli/src/services/orchestration/main/orchestration.handler.main.service.ts
@@ -3,10 +3,11 @@ import { COMMAND_REDIS_CHANNEL, WORKER_RESPONSE_REDIS_CHANNEL } from '../../redi
 import { handleWorkerResponseMessageMain } from './handleWorkerResponseMessageMain';
 import { handleCommandMessageMain } from './handleCommandMessageMain';
 import { OrchestrationHandlerService } from '../../orchestration.handler.base.service';
+import type { MainResponseReceivedHandlerOptions } from './types';
 
 @Service()
 export class OrchestrationHandlerMainService extends OrchestrationHandlerService {
-	async initSubscriber() {
+	async initSubscriber(options: MainResponseReceivedHandlerOptions) {
 		this.redisSubscriber = await this.redisService.getPubSubSubscriber();
 
 		await this.redisSubscriber.subscribeToCommandChannel();
@@ -16,7 +17,7 @@ export class OrchestrationHandlerMainService extends OrchestrationHandlerService
 			'OrchestrationMessageReceiver',
 			async (channel: string, messageString: string) => {
 				if (channel === WORKER_RESPONSE_REDIS_CHANNEL) {
-					await handleWorkerResponseMessageMain(messageString);
+					await handleWorkerResponseMessageMain(messageString, options);
 				} else if (channel === COMMAND_REDIS_CHANNEL) {
 					await handleCommandMessageMain(messageString);
 				}

diff --git a/packages/cli/src/services/orchestration/main/types.ts b/packages/cli/src/services/orchestration/main/types.ts
@@ -0,0 +1,6 @@
+import type { RedisServicePubSubPublisher } from '@/services/redis/RedisServicePubSubPublisher';
+
+export type MainResponseReceivedHandlerOptions = {
+	queueModeId: string;
+	redisPublisher: RedisServicePubSubPublisher;
+};
diff --git a/packages/cli/src/services/redis/RedisServiceCommands.ts b/packages/cli/src/services/redis/RedisServiceCommands.ts
@@ -94,7 +94,7 @@ export type RedisServiceWorkerResponseObject = {
 				workflowId: string;
 			};
 	  }
-);
+) & { targets?: string[] };
 
 export type RedisServiceCommandObject = {
 	targets?: string[];