- changed name of WTP_LS_ALLOW_REGEX to WTP_LS_ALLOWED_LOCATIONS_REGEX (#100)

- introduced a new option WTP_LS_ENABLED

Author: lukaszczerpak-cloudinary

config/default.js

@@ -37,7 +37,8 @@ const conf = {
     },
     timeout: process.env.WTP_TIMEOUT || 30000,
     "locationSelector": {
-      "allowRegex": process.env.WTP_LS_ALLOW_REGEX || '_US_',
+      "enabled": process.env.WTP_LS_ENABLED || false,
+      "allowedLocationsRegex": process.env.WTP_LS_ALLOWED_LOCATIONS_REGEX || '_US_',
       "cacheTtl": process.env.WTP_LS_CACHE_TTL || 10,
       "updateTimeout": process.env.WTP_LS_UPDATE_TIMEOUT || 20,
       "defaultLocation": process.env.WTP_LS_DEFAULT_LOCATION || "IAD_US_01"

wtp/locationSelector.js

@@ -29,9 +29,10 @@ const locationMetrics = {
 class LocationSelector {
     constructor() {
         if (!LocationSelector.instance) {
+            this.enabled = config.get('wtp.locationSelector.enabled');
             this.cachedAllLocations = [];
             this.location = config.get('wtp.locationSelector.defaultLocation');
-            this.allowRegex = new RegExp(config.get('wtp.locationSelector.allowRegex'));
+            this.allowedLocationsRegex = new RegExp(config.get('wtp.locationSelector.allowedLocationsRegex'));
             this.lastUpdated = null;
             this.mutex = withTimeout(new Mutex(), config.get('wtp.locationSelector.updateTimeout') * 1000);
             LocationSelector.instance = this;
@@ -114,7 +115,7 @@ class LocationSelector {
         }
 
         const filtered = Object.keys(newLocations)
-            .filter(key => this.allowRegex.test(key))
+            .filter(key => this.allowedLocationsRegex.test(key))
             .reduce((arr, key) => {
                 return [...arr, newLocations[key]];
             }, []);
@@ -154,7 +155,7 @@ class LocationSelector {
     };
 
     async getLocation() {
-        if (this.isExpired()) {
+        if (this.enabled && this.isExpired()) {
             try {
                 await this.mutex.runExclusive(async () => {
                     if (this.isExpired()) {