first commit

libs/api/shared/infrastructure/src/lib/redis/redis-connection.factory.ts

@@ -0,0 +1,26 @@
+import { Injectable, OnApplicationShutdown } from '@nestjs/common';
+import Redis from 'ioredis';
+
+/**
+ * Creates Redis connections and closes them on shutdown. Blocking commands
+ * (XREADGROUP BLOCK) and pub/sub subscribers need dedicated connections.
+ */
+@Injectable()
+export class RedisConnectionFactory implements OnApplicationShutdown {
+  private readonly connections: Redis[] = [];
+
+  constructor(private readonly url: string) {}
+
+  create(name: string): Redis {
+    const connection = new Redis(this.url, {
+      connectionName: `task-stream:${name}`,
+      maxRetriesPerRequest: null,
+    });
+    this.connections.push(connection);
+    return connection;
+  }
+
+  async onApplicationShutdown(): Promise<void> {
+    await Promise.allSettled(this.connections.map((c) => c.quit()));
+  }
+}

libs/api/shared/infrastructure/src/lib/redis/redis.tokens.ts

@@ -0,0 +1,2 @@
+export const REDIS_CLIENT = Symbol('REDIS_CLIENT');
+export const GRAPHQL_PUB_SUB = Symbol('GRAPHQL_PUB_SUB');