[ develop | DONE | CHANGED] Cache: change to LRU cache, remove short/long cache related code and properties, add preload requests in properties to load on init cache (on start, on clear and on daily reset)
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@ -1,2 +1,4 @@
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port = 4000
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utilsService = https://beta.explore.openaire.eu/utils-service
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environment = beta
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preloadRequests =https://beta.services.openaire.eu/openaire/info/,https://beta.services.openaire.eu/openaire/contexts/,https://beta.services.openaire.eu/usagestats/allmetrics,https://beta.services.openaire.eu/provision/mvc/vocabularies/dnet:provenanceActions.json,https://beta.services.openaire.eu/provision/mvc/vocabularies/dnet:subject_classification_typologies.json,https://beta.services.openaire.eu/provision/mvc/vocabularies/dnet:relation_relClass.json,https://beta.services.openaire.eu/provision/mvc/vocabularies/dnet:publication_resource.json,https://beta.services.openaire.eu/provision/mvc/vocabularies/dnet:dataCite_resource.json,https://beta.services.openaire.eu/provision/mvc/vocabularies/dnet:languages.json,https://beta.services.openaire.eu/provision/mvc/vocabularies/dnet:access_modes.json,https://beta.services.openaire.eu/provision/mvc/vocabularies/dnet:datasource_typologies.json,https://beta.services.openaire.eu/provision/mvc/vocabularies/dnet:datasourceCompatibilityLevel.json,https://beta.services.openaire.eu/provision/mvc/vocabularies/dnet:countries.json
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@ -2,22 +2,19 @@
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const axios = require('axios');
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let express = require('express');
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let app = express();
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let mcache = require('memory-cache');
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const { LRUCache } = require('lru-cache');
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const request = require('superagent');
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const prom = require('prom-client');
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const URL = require('url');
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var PropertiesReader = require('properties-reader');
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var properties = PropertiesReader('./properties.file');
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const expireShort = 60 * 60 * 1000 // 1 hour //2 * 60 * 1000; //2mins
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const expireLong = 24 * 60 * 60 * 1000; //24 hours
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const cacheMaxSize = 500;
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const longCachingRequests = ["/communityFull", "/full", "/pagehelpcontent",
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"/provision/mvc/vocabularies/", "/pages?page_route=",
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"/allmetrics", "/countryusagestats/", "/openaire/info",
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"/api/communities/", "/openaire/contexts/", "/utils-service/explore/home"];
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const PropertiesReader = require('properties-reader');
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const properties = PropertiesReader('./properties.file');
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const environment = properties.get("environment");
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const preloadRequests = properties.get("preloadRequests").split(',');;
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const cacheMaxSize = 300;
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let cors = require('cors');
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app.use(cors());
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const lruCache = new LRUCache({ max: cacheMaxSize });
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const register = new prom.Registry();
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prom.collectDefaultMetrics({register: register});
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@ -45,39 +42,40 @@ const histogram = new prom.Histogram({
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let cache = () => {
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return (req, res, next) => {
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if (req.query.url) {
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if (mcache.memsize() > cacheMaxSize) {
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console.log("Max cache size reached!" + cacheMaxSize);
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clearCache();
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}
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let key = '__express__' + req.query.url;
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let longCache = checkForLongCachedRequests(req.query.url);
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let cachedBody = mcache.get(key);
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const url = new URL.parse(req.query.url);
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const target = url.host + '/' + url.pathname.split('/')[1];
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const scheme = url.protocol.replace(':', '');
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if (cachedBody) {
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if (lruCache.has(key)) {
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// console.log( key, "hit")
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const end = histogram.startTimer({scheme: scheme, target: target, cache: 'hit'});
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res.send(JSON.parse(cachedBody));
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res.send(JSON.parse(lruCache.get(key)));
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responses.inc({scheme: scheme, target: target, code: res.statusCode});
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end();
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} else {
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const end = histogram.startTimer({scheme: scheme, target: target, cache: 'miss'});
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res.sendResponse = res.send;
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res.send = (body) => {
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let alreadyCached = !!mcache.get(key);
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entries.set(mcache.memsize());
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if (!alreadyCached) {
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responses.inc({scheme: scheme, target: target, code: res.statusCode});
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end();
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}
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if (res.statusCode === 200) {
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// console.log("Expire in " +(longCache?expireLong:expireShort) + " " +req.query.url);
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mcache.put(key, body, longCache ? expireLong : expireShort, () => {
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entries.set(mcache.memsize());
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});
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}
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res.sendResponse(body);
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};
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// console.log( key, "miss")
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const end = histogram.startTimer({scheme: scheme, target: target, cache: 'miss'});
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res.sendResponse = res.send;
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res.send = (body) => {
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if(isAllowedToBeCached(scheme, target)) {
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let alreadyCached = lruCache.has(key);
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entries.set(lruCache.size);
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if (!alreadyCached) {
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responses.inc({scheme: scheme, target: target, code: res.statusCode});
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end();
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}
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if (res.statusCode === 200) {
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lruCache.set(key, body);
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entries.set(lruCache.size);
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}
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res.sendResponse(body);
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}else{
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res.statusCode = 405;
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res.sendResponse(JSON.stringify( {code: 405, message: "Method not Allowed"}));
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}
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};
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next();
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}
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} else {
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@ -85,19 +83,26 @@ let cache = () => {
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}
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};
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};
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function isAllowedToBeCached(scheme, target){
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if(environment != "development"){
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return scheme.indexOf("https://")!=-1 && ( target.indexOf(".openaire.eu/") !=-1 || target.indexOf(".zenodo.org/api/") !=-1)
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} else if(environment == "development"){
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return target.indexOf(".openaire.eu/") !=-1 || target.indexOf(".di.uoa.gr") !=-1 || target.indexOf("dev-openaire.d4science.org") !=-1
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}
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return true;
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}
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app.get('/clear', (req, res) => {
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let c = mcache.size();
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let c = lruCache.size;
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const url = req.query.url;
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let message = "";
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if (url) {
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let key = '__express__' + req.query.url;
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mcache.del(key);
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lruCache.delete(key);
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message = "Delete entry with key " + url;
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entries.set(mcache.size());
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entries.set(lruCache.size);
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} else {
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clearCache();
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message = "Delete " + c + " entries. Now there are: " + mcache.size()
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message = "Delete " + c + " entries. Now there are: " + lruCache.size
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}
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res.header("Access-Control-Allow-Headers", "Origin, Content-Type, Content-Length");
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res.header("Access-Control-Allow-Methods", "GET, OPTIONS");
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@ -118,7 +123,6 @@ app.get('/get', cache(), cors(), (req, res) => {
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res.status(404).send(getResponse(404, "Not Found ")) //not found
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} else {
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request.get(url, function (err, response) {
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// res.header("Access-Control-Allow-Origin", "http://localhost:3000");
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res.header("Access-Control-Allow-Headers", "Origin, Content-Type, Content-Length");
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res.header("Access-Control-Allow-Methods", "GET, OPTIONS");
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res.header("Access-Control-Allow-Methods", "GET, OPTIONS");
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@ -154,31 +158,29 @@ function getResponse(code, message) {
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function clearCache() {
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console.log("cache is cleared!");
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mcache.clear();
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entries.set(mcache.size());
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lruCache.clear();
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entries.set(lruCache.size);
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initCache();
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}
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async function initCache() {
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try {
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const requests = await axios.get(properties.get('utilsService') + '/grouped-requests');
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const additionalDataPromises = requests.data.map((url) => axios.get('http://localhost:'+properties.get('port') + '/get?url=' + properties.get('utilsService') + url));
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const additionalDataResponses = await Promise.all(additionalDataPromises);
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console.log("Cache initialized!")
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const requests = await axios.get(properties.get('utilsService') + '/grouped-requests');
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const additionalDataPromises = requests.data.map((url) => axios.get('http://localhost:'+properties.get('port') + '/get?url=' + properties.get('utilsService') + url));
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const additionalDataResponses = await Promise.all(additionalDataPromises);
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console.log("Cache initialized group queries!")
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} catch (error) {
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console.error('Error fetching data: Cache initialize failed', error.message);
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console.error('Error fetching data: Cache initialize failed', error);
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}
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try{
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const additionalDataPromisesPreloadRequests = preloadRequests.map((url) => axios.get('http://localhost:'+properties.get('port') + '/get?url=' + url));
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const additionalDataResponsesPreloadRequests = await Promise.all(additionalDataPromisesPreloadRequests);
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console.log("Cache initialized preload requests!")
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} catch (error) {
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console.error('Error fetching data: Cache initialize failed', error);
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}
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}
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function checkForLongCachedRequests(url) {
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let long = false;
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longCachingRequests.forEach(partUrl => {
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if (url.indexOf(partUrl) !== -1) {
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long = true;
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}
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});
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return long;
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}
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function resetAtMidnight() {
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console.log("Run Reset timer");
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@ -13,7 +13,7 @@
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"axios": "^1.6.7",
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"cors": "^2.8.5",
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"express": "^4.18.2",
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"memory-cache": "^0.2.0",
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"lru-cache": "^10.2.0",
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"prom-client": "^11.3.0",
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"properties-reader": "^2.2.0",
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"superagent": "^5.0.5"
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@ -1,2 +1,5 @@
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port = 4000
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utilsService = https://explore.openaire.eu/utils-service
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environment = production
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preloadRequests =https://services.openaire.eu/openaire/info/,https://services.openaire.eu/openaire/contexts/,https://services.openaire.eu/usagestats/allmetrics,https://services.openaire.eu/provision/mvc/vocabularies/dnet:provenanceActions.json,https://services.openaire.eu/provision/mvc/vocabularies/dnet:subject_classification_typologies.json,https://services.openaire.eu/provision/mvc/vocabularies/dnet:relation_relClass.json,https://services.openaire.eu/provision/mvc/vocabularies/dnet:publication_resource.json,https://services.openaire.eu/provision/mvc/vocabularies/dnet:dataCite_resource.json,https://services.openaire.eu/provision/mvc/vocabularies/dnet:languages.json,https://services.openaire.eu/provision/mvc/vocabularies/dnet:access_modes.json,https://services.openaire.eu/provision/mvc/vocabularies/dnet:datasource_typologies.json,https://services.openaire.eu/provision/mvc/vocabularies/dnet:datasourceCompatibilityLevel.json,https://services.openaire.eu/provision/mvc/vocabularies/dnet:countries.json
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@ -1,2 +1,4 @@
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port = 3200
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utilsService= http://scoobydoo.di.uoa.gr:8000
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environment = development
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preloadRequests =https://dev-openaire.d4science.org/openaire/info/,https://dev-openaire.d4science.org/openaire/contexts/,https://dev-openaire.d4science.org/provision/mvc/vocabularies/dnet:provenanceActions.json,https://dev-openaire.d4science.org/provision/mvc/vocabularies/dnet:subject_classification_typologies.json,https://dev-openaire.d4science.org/provision/mvc/vocabularies/dnet:publication_resource.json,https://dev-openaire.d4science.org/provision/mvc/vocabularies/dnet:dataCite_resource.json,https://dev-openaire.d4science.org/provision/mvc/vocabularies/dnet:languages.json,https://dev-openaire.d4science.org/provision/mvc/vocabularies/dnet:access_modes.json,https://dev-openaire.d4science.org/provision/mvc/vocabularies/dnet:datasource_typologies.json,https://dev-openaire.d4science.org/provision/mvc/vocabularies/dnet:datasourceCompatibilityLevel.json,https://dev-openaire.d4science.org/provision/mvc/vocabularies/dnet:countries.json
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