@sap-cloud-sdk/core
Version:
SAP Cloud SDK for JavaScript core
77 lines • 2.77 kB
JavaScript
;
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.Cache = exports.IsolationStrategy = void 0;
var moment_1 = __importDefault(require("moment"));
/**
* Enumerator that selects the isolation type of destination in cache.
*/
var IsolationStrategy;
(function (IsolationStrategy) {
IsolationStrategy["Tenant"] = "Tenant";
IsolationStrategy["User"] = "User";
IsolationStrategy["Tenant_User"] = "TenantUser";
IsolationStrategy["No_Isolation"] = "NoIsolation";
})(IsolationStrategy = exports.IsolationStrategy || (exports.IsolationStrategy = {}));
/**
* Representation of a cache to transiently store objects locally for faster access.
* @typeparam T - Type of the cache entries.
*/
var Cache = /** @class */ (function () {
function Cache(validityTime) {
this.cache = {};
this.defaultValidityTime = validityTime;
}
/**
* Clear all cached items.
*/
Cache.prototype.clear = function () {
this.cache = {};
};
/**
* Specifies whether an entry with a given key is defined in cache.
* @param key - The entry's key
* @returns boolean A boolean value that indicates whether the entry exists in cache
*/
Cache.prototype.hasKey = function (key) {
return this.cache.hasOwnProperty(key);
};
/**
* Getter of cached entries.
* @param key - The key of the entry to retrieve.
* @returns The corresponding entry to the provided key if it is still valid, returns `undefined` otherwise.
*/
Cache.prototype.get = function (key) {
return key && this.hasKey(key) && !isExpired(this.cache[key])
? this.cache[key].entry
: undefined;
};
/**
* Setter of entries in cache.
* @param key - The entry's key
* @param entry - The entry to cache
* @param expirationTime - The time expressed in UTC in which the given entry expires
*/
Cache.prototype.set = function (key, entry, expirationTime) {
if (key) {
var expires = expirationTime
? (0, moment_1.default)(expirationTime)
: inferExpirationTime(this.defaultValidityTime);
this.cache[key] = { entry: entry, expires: expires };
}
};
return Cache;
}());
exports.Cache = Cache;
function isExpired(item) {
if (item.expires === undefined) {
return false;
}
return !item.expires.isAfter((0, moment_1.default)());
}
function inferExpirationTime(expirationTime) {
return expirationTime ? (0, moment_1.default)().add(expirationTime) : undefined;
}
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