redis configuration with bottleneck and shutdown method

src/rdrama/session/SessionManager.ts

@@ -1,6 +1,10 @@
 import axios, { AxiosInstance, AxiosError, AxiosResponse, AxiosRequestConfig } from 'axios';
 import axiosRetry from 'axios-retry';
 import Bottleneck from 'bottleneck';
+import dotenv from 'dotenv';
+
+// Load environment variables from .env file
+dotenv.config();
 
 class SessionManager {
     private static instance: SessionManager;
@@ -8,8 +12,19 @@ class SessionManager {
     private limiter: Bottleneck;
 
     private constructor() {
+
+
         // Initialize the Bottleneck limiter
         this.limiter = new Bottleneck({
+            id: "rDramaAPI-limiter",
+            datastore: "ioredis",
+            clearDatastore: false,
+            clientOptions: {
+                host: process.env.REDIS_HOST,
+                port: Number(process.env.REDIS_PORT),
+                password: process.env.REDIS_PASSWORD || undefined, // Use undefined if no password is set
+                enableOfflineQueue: true
+            },
             maxConcurrent: 1, // Maximum number of concurrent requests
             minTime: 1000 // Minimum time between dispatches of requests in milliseconds
         });
@@ -38,6 +53,10 @@ class SessionManager {
         return SessionManager.instance;
     }
 
+    public async shutdown(): Promise<void> {
+        await this.limiter.disconnect();
+    }
+
     private retryDelayStrategy(retryCount: number, error: AxiosError): number {
         const retryAfter = error.response?.headers['retry-after'];
         if (retryAfter) {
@@ -52,6 +71,7 @@ class SessionManager {
         return status === 429 || status >= 500;
     }
 
+
     private wrapAxiosInstance(instance: AxiosInstance): void {
         // Wrap the get method
         const originalGet = instance.get;
@@ -81,6 +101,8 @@ class SessionManager {
     public setAuthorizationToken(token: string): void {
         this.axiosInstance.defaults.headers.common['Authorization'] = `${token}`;
     }
+
+
 }
 
 export default SessionManager;