@fingerprintsoft/angular-spring-hal
Version:
This Angular module offers a HAL/JSON http-client to easily interact with a Spring Data Rest API or any API that implements the Spring Data Rest resource model
97 lines • 14.4 kB
JavaScript
import * as hash from 'hash.js';
export var EvictStrategy;
(function (EvictStrategy) {
EvictStrategy[EvictStrategy["EvictTrivial"] = 0] = "EvictTrivial";
EvictStrategy[EvictStrategy["EvictSmart"] = 1] = "EvictSmart";
})(EvictStrategy || (EvictStrategy = {}));
// @dynamic
export class CacheHelper {
static initClearCacheProcess() {
if (this.isActive) {
setInterval(() => {
Date.now();
if (CacheHelper.evictStrategy == EvictStrategy.EvictTrivial)
this.evictAll();
else if (CacheHelper.evictStrategy == EvictStrategy.EvictSmart) {
this.cacheMap.forEach((value, key) => {
if (value.expire > 0 && Date.now() > value.expire)
this.evict(key);
});
}
}, 15 * 60 * 1000);
}
}
static ifPresent(link, body, params, isActiveLocal = true) {
if (!this.isActive || !isActiveLocal)
return false;
return this.cacheMap.has(CacheHelper.key(link, body, params));
}
static getArray(link, body, params) {
return this.cacheMap.get(CacheHelper.key(link, body, params)).entity;
}
static putArray(link, array, expireMs = 10 * 60 * 1000, body, params) {
if (this.isActive) {
let resourceExpire = { entity: array, expire: CacheHelper.expireDate(expireMs) };
this.cacheMap.set(CacheHelper.key(link, body, params), resourceExpire);
}
}
static get(link, body, params) {
return this.cacheMap.get(CacheHelper.key(link, body, params)).entity;
}
static put(link, array, expireMs = 10 * 60 * 1000, body, params) {
if (this.isActive) {
let resourceExpire = { entity: array, expire: CacheHelper.expireDate(expireMs) };
this.cacheMap.set(CacheHelper.key(link, body, params), resourceExpire);
}
}
static expireDate(expireMs) {
if (expireMs == 0)
return 0;
return Date.now() + expireMs;
}
static key(link, body, halOptions) {
let k = link;
if (body)
k += body;
if (halOptions)
k += CacheHelper.toStringParams(halOptions);
let key = hash.sha256().update(k).digest('hex');
return key;
}
static toStringParams(options) {
let s = '';
if (options.size) {
s = 'size=' + options.size.toString() + '&';
}
if (options.notPaged) {
s += 'notPaged=true&';
}
if (options.params) {
options.params.forEach(param => {
s += param.key + '=' + param.value + '&';
});
}
if (options.sort) {
options.sort.forEach(sortInfo => {
let sortString = '';
sortString = sortInfo.path ? sortString.concat(sortInfo.path) : sortString;
sortString = sortInfo.order ? sortString.concat(',').concat(sortInfo.order) : sortString;
s += 'sort' + sortString + '&';
});
}
return s;
}
static evict(key) {
this.cacheMap.delete(key);
}
static evictAll() {
this.cacheMap.clear();
}
}
CacheHelper.cacheMap = new Map();
CacheHelper.isActive = true;
// TODO
CacheHelper.maxEntries = 100;
CacheHelper.evictStrategy = EvictStrategy.EvictTrivial;
CacheHelper.defaultExpire = 10 * 60 * 1000; //10 minutes
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//10 minutes\n\n    static initClearCacheProcess() {\n        if (this.isActive) {\n            setInterval(() => {\n                Date.now();\n                if (CacheHelper.evictStrategy == EvictStrategy.EvictTrivial)\n                    this.evictAll();\n                else if (CacheHelper.evictStrategy == EvictStrategy.EvictSmart) {\n                    this.cacheMap.forEach((value: ResourceExpire<any>, key: string) => {\n                        if (value.expire > 0 && Date.now() > value.expire)\n                            this.evict(key);\n                    });\n                }\n            }, 15 * 60 * 1000);\n        }\n    }\n\n    static ifPresent<T extends Resource>(link: string, body?: string, params?: HalOptions, isActiveLocal: boolean = true): boolean {\n        if (!this.isActive || !isActiveLocal)\n            return false;\n        return this.cacheMap.has(CacheHelper.key(link, body, params));\n    }\n\n    static getArray<T extends Resource>(link: string, body?: string, params?: HalOptions): T[] {\n        return this.cacheMap.get(CacheHelper.key(link, body, params)).entity;\n    }\n\n    static putArray<T extends Resource>(link: string, array: T[], expireMs: number = 10 * 60 * 1000, body?: string, params?: HalOptions) {\n        if (this.isActive) {\n            let resourceExpire: ResourceExpire<T> = {entity: array, expire: CacheHelper.expireDate(expireMs)};\n            this.cacheMap.set(CacheHelper.key(link, body, params), resourceExpire);\n        }\n    }\n\n    static get<T extends Resource>(link: string, body?: string, params?: HalOptions): T {\n        return this.cacheMap.get(CacheHelper.key(link, body, params)).entity;\n    }\n\n    static put<T extends Resource>(link: string, array: T, expireMs: number = 10 * 60 * 1000, body?: string, params?: HalOptions) {\n        if (this.isActive) {\n            let resourceExpire: ResourceExpire<T> = {entity: array, expire: CacheHelper.expireDate(expireMs)};\n            this.cacheMap.set(CacheHelper.key(link, body, params), resourceExpire);\n        }\n    }\n\n    private static expireDate(expireMs: number): number {\n        if (expireMs == 0)\n            return 0;\n        return Date.now() + expireMs;\n    }\n\n    private static key(link: string, body?: string, halOptions?: HalOptions): string {\n\n        let k: string = link;\n        if (body)\n            k += body;\n\n        if (halOptions)\n            k += CacheHelper.toStringParams(halOptions);\n\n        let key: string = hash.sha256().update(k).digest('hex');\n        return key;\n    }\n\n    private static toStringParams(options: HalOptions) {\n        let s: string = '';\n        if (options.size) {\n            s = 'size=' + options.size.toString() + '&';\n        }\n\n        if (options.notPaged) {\n            s += 'notPaged=true&';\n        }\n\n        if (options.params) {\n            options.params.forEach(param => {\n                s += param.key + '=' + param.value + '&';\n            });\n        }\n\n        if (options.sort) {\n            options.sort.forEach(sortInfo => {\n                let sortString = '';\n                sortString = sortInfo.path ? sortString.concat(sortInfo.path) : sortString;\n                sortString = sortInfo.order ? sortString.concat(',').concat(sortInfo.order) : sortString;\n                s += 'sort' + sortString + '&';\n            });\n        }\n        return s;\n    }\n\n    static evict(key: string) {\n        this.cacheMap.delete(key);\n    }\n\n    static evictAll() {\n        this.cacheMap.clear();\n    }\n}\n"]}