# node-applicationcontext **Repository Path**: 41zone/node-applicationcontext ## Basic Information - **Project Name**: node-applicationcontext - **Description**: The Key-Value global storage, it's look like ApplicationContext for Servlet. - **Primary Language**: JavaScript - **License**: MIT - **Default Branch**: master - **Homepage**: None - **GVP Project**: No ## Statistics - **Stars**: 0 - **Forks**: 1 - **Created**: 2014-09-25 - **Last Updated**: 2023-07-17 ## Categories & Tags **Categories**: node-plugins **Tags**: None ## README Introduction =========== The Key-Value global storage, it's look like ApplicationContext for Servlet. Usage ========== ```Bash npm install applicationcontext --save ``` API =========== ### Require ```Javascript var AppContext = require('applicationcontext'); ``` ### Setter & Getter `set([key,]value)` * key {String}, Optional : the name of value , use this format named ,like 'a.b.c' * value {AnyType} : if use plain object , please note that the key named do not look like 'a.b.c', otherwise, there is some error to invoke 'get' method ```Javascript AppContext.set("username","Jimmy Song"); console.log(AppContext.get("username")); //Use Plain Object like this AppContext.set({ session : { name : "user", expire : 3000 }, // do not name key that look like 'a.b.c', it's error "local.name" : "good" }); console.log(AppContext.get("session.name")); // output : user console.log(AppContext.get("local.name")); // output : undefined ``` `get(key)` * key {String} : e.g `AppContext.get('username');` or `AppContext.get('session.name')` `remove(key)` * key {String} : e.g `AppContext.remove('username');` or `AppContext.remove('session.name')` `clear()` * Remove all data ### Event `on(key,listener)` ```Javascript // add event listener for some key AppContext.on('session.name',function(value,message){ // 'value' is stored value , and 'message' is extra information while the event is triggered console.log("the value is ",value); console.log("and extra message is ",message); }); ``` `emit(key,message)` ```Javascript // emit event named 'session.name', and use extra message AppContext.set('session.name','Freeman'); AppContext.emit('session.name','hi, there is extra information, just tell you the session.name value is changed'); ``` `off(key [ , listener ] )` ```Javascript // Remove the specified listener for 'session.name' AppContext.off('session.name',listener); // Remove all listener for 'session.name' AppContext.off('session.name'); ```