feat: implement caching in active api

package.json

@@ -13,13 +13,14 @@
     "@prisma/client": "^4.0.0",
     "cors": "^2.8.5",
     "next": "12.2.0",
+    "node-cache": "^5.1.2",
     "react": "18.2.0"
   },
   "devDependencies": {
-    "@semantic-release/commit-analyzer": "^9.0.2",
-    "@semantic-release/git": "^10.0.1",
     "@semantic-release-plus/docker": "^3.1.2",
     "@semantic-release/changelog": "^6.0.1",
+    "@semantic-release/commit-analyzer": "^9.0.2",
+    "@semantic-release/git": "^10.0.1",
     "@semantic-release/github": "^8.0.5",
     "@types/cors": "^2.8.12",
     "@types/node": "18.0.0",

public/js/interactive_maps.js

@@ -5380,7 +5380,7 @@ var $author$project$Main$Window = F2(
 		return {aM: height, a5: width};
 	});
 var $author$project$Endpoint$Endpoint = $elm$core$Basics$identity;
-var $author$project$Endpoint$activeSessions = 'http://localhost:3000/api/active';
+var $author$project$Endpoint$activeSessions = 'api/active';
 var $elm$core$Platform$Cmd$batch = _Platform_batch;
 var $author$project$Clustermap$MapSettings = F4(
 	function (height, width, activeIconSize, emptyIconSize) {

src/pages/api/active.ts

@@ -1,42 +1,49 @@
 import type { NextApiRequest, NextApiResponse } from "next";
 import { prisma } from "../../server/db/client";
 import Cors from "cors";
+import NodeCache from "node-cache";
+
+const locationCache = new NodeCache();
 
 const cors = Cors({
-    methods: ['POST', 'GET', 'HEAD'],
-  })
-
-  // Helper method to wait for a middleware to execute before continuing
-  // And to throw an error when an error happens in a middleware
-  function runMiddleware(
-    req: NextApiRequest,
-    res: NextApiResponse,
-    fn: Function
-  ) {
-    return new Promise((resolve, reject) => {
-      fn(req, res, (result: any) => {
-        if (result instanceof Error) {
-          return reject(result)
-        }
-
-        return resolve(result)
-      })
+  methods: ['POST', 'GET', 'HEAD'],
+})
+
+// Helper method to wait for a middleware to execute before continuing
+// And to throw an error when an error happens in a middleware
+function runMiddleware(
+  req: NextApiRequest,
+  res: NextApiResponse,
+  fn: Function
+) {
+  return new Promise((resolve, reject) => {
+    fn(req, res, (result: any) => {
+      if (result instanceof Error) {
+        return reject(result)
+      }
+
+      return resolve(result)
     })
-  }
+  })
+}
 
 const locations = async (req: NextApiRequest, res: NextApiResponse) => {
-    await runMiddleware(req, res, cors);
+  await runMiddleware(req, res, cors);
 
-    const locations = await prisma.location.findMany({
-    where: {
+  let locations = locationCache.get("locations");
+  if (locations == undefined) {
+    const db_locations = await prisma.location.findMany({
+      where: {
         end_at: null,
-    },
-    select: {
+      },
+      select: {
         login: true,
         hostname: true,
-    }
-  });
-
+      }
+    });
+    locationCache.set("locations", db_locations, 5);
+    locations = db_locations;
+  }
   res.status(200).json(locations);
 };
 

yarn.lock

@@ -1166,6 +1166,11 @@ cliui@^7.0.2:
     strip-ansi "^6.0.0"
     wrap-ansi "^7.0.0"
 
+[email protected]:
+  version "2.1.2"
+  resolved "https://registry.yarnpkg.com/clone/-/clone-2.1.2.tgz#1b7f4b9f591f1e8f83670401600345a02887435f"
+  integrity sha512-3Pe/CF1Nn94hyhIYpjtiLhdCoEoz0DqQ+988E9gmeEdQZlojxnOb74wctFyuwWQHzqyf9X7C7MG8juUpqBJT8w==
+
 clone@^1.0.2:
   version "1.0.4"
   resolved "https://registry.yarnpkg.com/clone/-/clone-1.0.4.tgz#da309cc263df15994c688ca902179ca3c7cd7c7e"
@@ -3159,6 +3164,13 @@ [email protected]:
     "@next/swc-win32-ia32-msvc" "12.2.0"
     "@next/swc-win32-x64-msvc" "12.2.0"
 
+node-cache@^5.1.2:
+  version "5.1.2"
+  resolved "https://registry.yarnpkg.com/node-cache/-/node-cache-5.1.2.tgz#f264dc2ccad0a780e76253a694e9fd0ed19c398d"
+  integrity sha512-t1QzWwnk4sjLWaQAS8CHgOJ+RAfmHpxFWmc36IWTiWHQfs0w5JDMBS1b1ZxQteo0vVVuWJvIUKHDkkeK7vIGCg==
+  dependencies:
+    clone "2.x"
+
 node-emoji@^1.11.0:
   version "1.11.0"
   resolved "https://registry.yarnpkg.com/node-emoji/-/node-emoji-1.11.0.tgz#69a0150e6946e2f115e9d7ea4df7971e2628301c"