zpt/js/app/cache/expressionCache.js

Zenon Page Templates - JS (ZPT-JS)

/*
    expressionCache singleton class
*/

import { cacheHelper } from './cacheHelper.js';
import { context } from '../context.js';
import { logHelper as log } from '../logHelper.js';

export const expressionCache = (function() {
    
    var map = {};
    
    var get = function( string ) {
        return map[ cacheHelper.hashCode( string ) ];
    };
    
    var put = function( string, value ){
        map[ cacheHelper.hashCode( string ) ] = value;
    };
    
    var process = function( string, buildFunction, force ) {
        
        log.debug( 
            'Request building of expression "' + string + '", force "' + force + '"' );
        
        // Get from cache if possible
        if ( ! force && context.getConf().expressionCacheOn ){
            log.debug( 'Cache ON!' );
            var fromCache = get( string );
            if ( fromCache ){
                log.debug( 'Found in cache!' );
                return fromCache;
            } 
            log.debug( 'NOT found in cache!' );
            
        } else {
            log.debug( 'Cache OFF!' );
        }
        
        // Force build and put into cache
        log.debug( 'Must build!' );
        var builded = buildFunction();
        put( string, builded );
        return builded;
    };
    
    var clean = function( ) {
        map = {};
    };
    
    return {
        get: process,
        clean: clean
    };
})();