bf: ZENKO 1402 location constraint update event

lib/data/wrapper.js

@@ -20,13 +20,6 @@ try {
 let client;
 let implName;
 
-config.on('location-constraints-update', () => {
-    const clients = parseLC(config, vault);
-    client = new MultipleBackendGateway(
-        clients, metadata, locationStorageCheck);
-    implName = 'multipleBackends';
-});
-
 if (config.backends.data === 'mem') {
     client = inMemory;
     implName = 'mem';
@@ -54,4 +47,14 @@ if (config.backends.data === 'mem') {
 
 const data = new DataWrapper(
     client, implName, config, kms, metadata, locationStorageCheck, vault);
+
+config.on('location-constraints-update', () => {
+    if (implName === 'multipleBackends') {
+        const clients = parseLC(config, vault);
+        client = new MultipleBackendGateway(
+            clients, metadata, locationStorageCheck);
+        data.switch(client);
+    }
+});
+
 module.exports = { data, client, implName };

lib/server.js

@@ -3,7 +3,7 @@ const https = require('https');
 const cluster = require('cluster');
 const { series } = require('async');
 const arsenal = require('arsenal');
-const { RedisClient, StatsClient } = require('arsenal').metrics;
+const { RedisClient, StatsClient } = arsenal.metrics;
 const monitoringClient = require('./utilities/monitoringHandler');
 
 const logger = require('./utilities/logger');
@@ -12,7 +12,7 @@ const { clientCheck } = require('./utilities/healthcheckHandler');
 const _config = require('./Config').config;
 const { blacklistedPrefixes } = require('../constants');
 const api = require('./api/api');
-const { client, implName } = require('./data/wrapper');
+const dataWrapper = require('./data/wrapper');
 const kms = require('./kms/wrapper');
 const locationStorageCheck =
     require('./api/apiUtils/object/locationStorageCheck');
@@ -25,7 +25,10 @@ const {
 } = require('./management/agentClient');
 
 const routes = arsenal.s3routes.routes;
+const { parseLC, MultipleBackendGateway } = arsenal.storage.data;
 const websiteEndpoints = _config.websiteEndpoints;
+let client = dataWrapper.client;
+const implName = dataWrapper.implName;
 
 let allEndpoints;
 function updateAllEndpoints() {
@@ -33,6 +36,13 @@ function updateAllEndpoints() {
 }
 _config.on('rest-endpoints-update', updateAllEndpoints);
 updateAllEndpoints();
+_config.on('location-constraints-update', () => {
+    if (implName === 'multipleBackends') {
+        const clients = parseLC(_config, vault);
+        client = new MultipleBackendGateway(
+            clients, metadata, locationStorageCheck);
+    }
+});
 
 // redis client
 let localCacheClient;