#Yaap-Wire plugin This project contains annotations that only work as a wire.js-plugin.

##wire.js Integration To use @Autowired (and annotations in general) in wire.js, simply add it as a plugin:

var wire = require("wire");
wire({
	level: "INFO",
	logger: {create:  './Logger'},

	plugins: [
		{module: "yaap/wire"}
	]
}, {require: require}).then(function(ctx){
	ctx.logger.log("message");
}, console.error);

Everything else is done by yaap, so you can start use your annotations:

//Logger.js

module.exports = {
  log: function(message, /*@Autowire*/ level){
		console.log(level + ": " + message);
	}
}

level references the value in the wire-context (with value "INFO") now.

Remark: Yaap/wire uses the parameter name to autowire. You can also supply a reference name with /*@Autowire("level")*/

Remark: You can also annotate the whole function with @Autowire so every parameter will be autowired by name.

##Wire annotations

• @Autowired([<refName>]) (parameter/function/class): if a parameter is unassigned or null, a bean from the wire-context will be injected instead. If the annotation is placed at a parameter, the given refName or, if ommitted, the parameter-name will be used to resolve the reference. If the annotation is function-level, all parameters that are null or unassigned will be autowired by parameter-name. If the annotation is class-level, the parameter could be a string, an array of strings or an object that maps strings onto strings. New Properties according to the given names will be injected with the referenced beans.

• @PostConstruct (function): the annotated function will be called after container finished configuring the bean.

• @PreDestroy (function): the annotated function will be called, if context.destroy() is called.

##Express.js integration

There are also out-of-the-box annotations included for creating webapps in a springMVC-like manner. More information on how to setup this integration is available here A simple example of a service:

MyService.prototype = {
    index: function ()/*@GET*/ {
		return 'index';
    },

    submit: function (name, age)/*@POST @Param*/ {
     var msg = (age < 18)? "You are too young" : "You are welcome!";
	 return {view:'greet', model:{name: name, msg: msg}};
    }
};

As known from SpringMVC, the returned values determine, which view will be called and with what parameters. More details on this in my blogpost.

###browser-specific wire annotations for these annotations, you need to add the additional yaap/wire/html-plugin! (as shown in the browser-example)

• @On(<refName>, <event>) (function): the annotated function will automatically be bound the the event of the given dom-node. This is intended to be used with the wire/dom-plugin. can reference one or more elements in the dom (though it is probably better practice to reference a bean in the wirecontext, which itself references the dom-nodes). For example, you could bind a clickhandler with this annotation: @On("dom.all!.btn","click"). The annotated method accepts one argument that is the event (though you could add additional @autowired arguments, if you want)

###Node-Specific wire-annotations (Express.js) for these annotations, you need to add the additional yaap/wire/express-plugin! (and you need to feed the express-application into the plugin as shown in the express-example)

• @GET/POST/PUT/DELETE([<pathspec>]) (function): registeres the function as an endpoint in an express-application with either the given path or the functionname as path, if omitted.
• @Param([<name>]) (parameter/function): fetches the annotated parameter from the query/path/post parameters. If annotation is on function-level, all parameters (except @Body-annotated parameters) are injected by-name.
• @Body (parameter/function): if parameter-level, then the request-body will be injected. If on function-level, it states that the return-value will be returned as-is (Just like @ResponseBody does in SpringMVC).
• @JSON (function): states, that the returned value will be send as response in json-format. (using response.json).
• @Callback (parameter): a callback will be injected so you can return your response asynchronously. You can also simply return a promise, so you do not need to use a callback for asynchronous operations.