Output cache clearing versioning

core/scripts/cache.js

@@ -1,17 +1,6 @@
 const program = require('commander')
 const config = require('config')
-const TagCache = require('redis-tag-cache').default
-
-let cache
-if (config.server.useOutputCache) {
-  cache = new TagCache({
-    redis: config.redis,
-    defaultTimeout: config.server.outputCacheDefaultTtl // Expire records after a day (even if they weren't invalidated)
-  })
-  console.log('Redis cache set', config.redis)
-} else {
-  console.error('Output cache is disabled in the config')
-}
+const cache = require('./utils/cache-instance')
 
 program
   .command('clear')

core/scripts/server.js

@@ -1,12 +1,14 @@
 const fs = require('fs')
 const path = require('path')
 const express = require('express')
+const compile = require('lodash.template')
 const rootPath = require('app-root-path').path
 const resolve = file => path.resolve(rootPath, file)
+
+const cache = require('./utils/cache-instance')
+const apiStatus = require('./utils/api-status')
+
 let config = require('config')
-const TagCache = require('redis-tag-cache').default
-const utils = require('./server/utils')
-const compile = require('lodash.template')
 
 const compileOptions = {
   escape: /{{([^{][\s\S]+?[^}])}}/g,
@@ -18,19 +20,6 @@ process.noDeprecation = true
 
 const app = express()
 
-let cache
-if (config.server.useOutputCache) {
-  const cacheKey = JSON.parse(fs.readFileSync(path.join(__dirname, '..', 'build', 'cache-version.json')) || '')
-  const redisConfig = Object.assign(config.redis, { keyPrefix: cacheKey })
-
-  cache = new TagCache({
-    redis: redisConfig,
-    defaultTimeout: config.server.outputCacheDefaultTtl
-  })
-
-  console.log('Redis cache set', redisConfig)
-}
-
 const templatesCache = {}
 let renderer
 for (const tplName of Object.keys(config.ssr.templates)) {
@@ -76,7 +65,7 @@ function invalidateCache (req, res) {
     if (req.query.tag && req.query.key) { // clear cache pages for specific query tag
       if (req.query.key !== config.server.invalidateCacheKey) {
         console.error('Invalid cache invalidation key')
-        utils.apiStatus(res, 'Invalid cache invalidation key', 500)
+        apiStatus(res, 'Invalid cache invalidation key', 500)
         return
       }
       console.log(`Clear cache request for [${req.query.tag}]`)
@@ -99,17 +88,17 @@ function invalidateCache (req, res) {
         }
       })
       Promise.all(subPromises).then(r => {
-        utils.apiStatus(res, `Tags invalidated successfully [${req.query.tag}]`, 200)
+        apiStatus(res, `Tags invalidated successfully [${req.query.tag}]`, 200)
       }).catch(error => {
-        utils.apiStatus(res, error, 500)
+        apiStatus(res, error, 500)
         console.error(error)
       })
     } else {
-      utils.apiStatus(res, 'Invalid parameters for Clear cache request', 500)
+      apiStatus(res, 'Invalid parameters for Clear cache request', 500)
       console.error('Invalid parameters for Clear cache request')
     }
   } else {
-    utils.apiStatus(res, 'Cache invalidation is not required, output cache is disabled', 200)
+    apiStatus(res, 'Cache invalidation is not required, output cache is disabled', 200)
   }
 }
 

core/scripts/server/utils.js → core/scripts/utils/api-status.js

@@ -3,7 +3,7 @@
  * @param {number} [code=200] Status code to send on success
  * @param {json} [result='OK'] Text message or result information object
  */
-module.exports.apiStatus = (res, result = 'OK', code = 200, meta = null) => {
+module.exports = (res, result = 'OK', code = 200, meta = null) => {
   let apiResult = { code: code, result: result }
   if (meta !== null) {
     apiResult.meta = meta

core/scripts/utils/cache-instance.js

@@ -0,0 +1,21 @@
+const fs = require('fs')
+const path = require('path')
+const TagCache = require('redis-tag-cache').default
+const config = require('config')
+
+module.exports = () => {
+  if (config.server.useOutputCache) {
+    return false
+  }
+
+  const cacheVersionPath = path.join(__dirname, '..', 'build', 'cache-version.json')
+  const cacheKey = JSON.parse(fs.readFileSync(cacheVersionPath) || '')
+  const redisConfig = Object.assign(config.redis, { keyPrefix: cacheKey })
+
+  console.log('Redis cache set', redisConfig)
+
+  return new TagCache({
+    redis: redisConfig,
+    defaultTimeout: config.server.outputCacheDefaultTtl
+  })
+}

package.json

@@ -59,7 +59,6 @@
     "isomorphic-fetch": "^2.2.1",
     "js-sha3": "^0.8.0",
     "localforage": "^1.7.2",
-    "lru-cache": "^4.0.1",
     "magento2-rest-client": "github:DivanteLtd/magento2-rest-client",
     "pm2": "^2.10.4",
     "reflect-metadata": "^0.1.12",