efw.resources.server.efw.server.event.js Maven / Gradle / Ivy

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"efw" is an Ajax framework for server site JavaScript designed and developed by Escco Co., Ltd. using a goal-oriented method. It is provided as open source free software.
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"use strict";
/**** efw4.X Copyright 2019 efwGrp ****/
/**
 * The class to operate event.
 * 
 * @author Chang Kejun
 */
function EfwServerEvent() {
};
/**
 * The function to fire another event in an event firing.
 * 
 * @param {String}
 *            eventId: required

 * @param {Object}
 *            params: optional

 *            {param1:value1,param2:value2,...}

 * @param {String}
 *            server: optional

 *            The url of cors connections to another web server application constructed by Efw.

 *            http://127.0.0.1:8080/efw

 * @returns {Result}
 */
EfwServerEvent.prototype.fire = function(eventId, params, server) {
	if (server==undefined){
		if (params==undefined){
			params={};
		}else if(typeof(params) == "string"){
			server=params;
			params={};
		}
	}
	var result=new Result();
	if (server==undefined){
		var ev=this._get(eventId);
		if (ev==null||ev.from=="file"){
			ev=this._load(eventId);
		}
		result=ev.fire(params);
	}else{
		var servletUrl = "efwServlet";
		var jsonString=""+Packages.efw.event.RemoteEventManager.call(
				server+"/"+servletUrl,
				JSON.stringify({eventId:eventId,params:params})
			);
		var resultJSON=JSON.parse(jsonString);
		if (resultJSON.actions!=null&&resultJSON.values!=null){
			result.actions=resultJSON.actions;
			result.values=resultJSON.values;
		}else{
			result=resultJSON;
		}
	}
	return result;
};
///////////////////////////////////////////////////////////////////////////////

EfwServerEvent.prototype._get = function(eventId){
	var g = Function('return this')();
	return g[eventId];
};
EfwServerEvent.prototype._set = function(eventId, ev){
	var g = Function('return this')();
	g[eventId]=ev;
};
/**
 * The locker for event operating.
 */
EfwServerEvent.prototype._locker = new java.util.concurrent.locks.ReentrantLock();
/**
 * The function to load a event.

 * If the debug mode,load event every time.

 * If the release mode, load event only the first time.

 * If the event is from resource,do not reload it.

 * @param {String}
 *            eventId: required

 * @returns {EventInfo}
 */
EfwServerEvent.prototype._load = function(eventId,loadingGlobal){
	//if the global.js is not exists,warning log.
	if (loadingGlobal){
		if (!absfile.exists(_eventfolder + "/" + eventId + ".js")){
			Packages.efw.framework.initWLog( eventId + ".js is not found.");
			return null;
		}
	}
	//--------------------
	/**
	 * This function to set eventinfo about service
	 */
	function setService(ev,preService,preSemaphore){
		if (ev.service!=null){
			if (preService==null)preService={};
			if(ev.service.max!=null && ev.service.max>-1 && ev.service.max!=preService.max){
				ev.semaphore=new java.util.concurrent.Semaphore(ev.service.max); 
			}else if(ev.service.max==preService.max){
				ev.semaphore=preSemaphore;
			}
		}else{
			ev.semaphore=null;
		}
	}
	//--------------------
	try {
		this._locker.lock();
		//if the event hasnot be loaded, load it.
		if(!this._get(eventId)){
			load(_eventfolder + "/" + eventId + ".js");
			var ev=this._get(eventId);
			if (ev){
				ev.lastModified =""+absfile.get(_eventfolder + "/" + eventId + ".js").lastModified;
				if(eventId!="global")setService(ev,null,null);
				ev.from="file";//from is checked in fire event, so it must be the last step.
			}
		}else if (_isdebug){
			var org=this._get(eventId);
			var orgLastModified=""+org.lastModified;
			var evLastModified=""+absfile.get(_eventfolder + "/" + eventId + ".js").lastModified;
			if (orgLastModified!=evLastModified){
				this._set(eventId,null);
				load(_eventfolder + "/" + eventId + ".js");
				var ev=this._get(eventId);
				if (ev){
					ev.lastModified =absfile.get(_eventfolder + "/" + eventId + ".js").lastModified;
					setService(ev,org.service,org.semaphore);
					ev.from="file";//from is checked in fire event, so it must be the last step.
				}
			}
		}
	}catch(e){
		if (e instanceof Error)e=""+e;
		if (loadingGlobal){
			Packages.efw.framework.initSLog("global.js cannot be loaded.",e);
		}else{
			Packages.efw.framework.runtimeSLog(e);
		}
		this._set(eventId,null);
	} finally {
		this._locker.unlock();
	}
	return this._get(eventId);
};