Redis caching feature started

Author: anijitsao

.env.development

@@ -14,4 +14,7 @@ ERROR_FORBIDDEN_CODE=403
 
 # JWT secret
 JWT_SECRET="superSKR"
-JWT_TOKEN_EXPIRES_IN="10m"
+JWT_TOKEN_EXPIRES_IN="10m"
+
+# REDIS related
+REDIS_CONNECTION_URL="redis://35.154.200.227:6379"

package-lock.json

@@ -15,6 +15,7 @@
   },
   "dependencies": {
     "jsonwebtoken": "^8.5.1",
-    "mongodb": "^4.7.0"
+    "mongodb": "^4.7.0",
+    "redis": "^4.1.1"
   }
 }

package.json

@@ -0,0 +1,5 @@
+const connectRedis = async () => {
+  await client.connect();
+};
+
+export { connectRedis };

src/helpers/jwtHelper.js renamed to src/helpers/jwtHelpers.js

@@ -0,0 +1,29 @@
+import { createClient } from "redis";
+
+const redisClient = createClient({
+  url: process.env.REDIS_CONNECTION_URL,
+});
+
+export { redisClient };
+// on all error execute this line
+// client.on("error", (err) => console.log("Redis Error: ", err.toString()));
+
+// await client.connect();
+// await client.set("num", 23);
+// const value = await client.get("num");
+// console.log("Value as received", value);
+
+// const nameVal = await client.get("name");
+// console.log("Name vlaue: ", nameVal);
+
+// // const an object as key
+// const keyObj = { username: "anij123" };
+// const keyObjVal = { name: "Anijit Sau", role: "Developer", country: "India" };
+// await client.hSet("anij123", keyObjVal);
+// const valueKeyObj = await client.hGetAll("anij123");
+// console.log(
+//   "value received :",
+//   valueKeyObj,
+//   " \nand its type: ",
+//   typeof valueKeyObj
+// );

src/helpers/redisHelpers.js

@@ -1,5 +1,5 @@
 // local dependencies
-import { createToken } from "../helpers/jwtHelper.js";
+import { createToken } from "../helpers/jwtHelpers.js";
 import { sendResponse } from "../helpers/sendResponse.js";
 import { findUserFromDb } from "../dbRelated/logindDbOps.js";
 

src/lib/redisClient.js

@@ -11,7 +11,7 @@ import {
   sendForbiddenResponse,
 } from "../helpers/sendResponse.js";
 
-import { verifyToken } from "../helpers/jwtHelper.js";
+import { verifyToken } from "../helpers/jwtHelpers.js";
 
 const getAllUsersHandler = async (event) => {
   const verified = verifyToken(event);