Skip to main content

ColdFusion 10: REST settings in Application.cfc

There are a couple of variables that have been introduced in Application.cfc which are REST specific. These are this.restsettings.cfclocation and this.restsettings.skipCFCWithError. If you have a list of directories containing REST enabled CFCs then you can specify the same in the variable this.restsettings.cfclocation. At the time of registration, the specified directories and its subdirectories will be scanned for REST enabled CFCs and then deployed. If any of these CFCs contain compilation errors then an error is thrown and the registration would fail. To tackle this another variable this.restsettings.skipCFCWithError is provided. When set to true, the CFCs with compilation errors would be skipped. Only those without any compilation errors would be deployed successfully.

Consider this directory structure containing REST CFCs:

REST_ApplicationSettings

Here the directories cfcdir1 and cfcdir2 contain REST enabled CFCs. The CFC - Service2.cfc contains compilation errors. The Application.cfc directory under appcfc contains these settings:

<cfcomponent> <cfset this.name="restappcfc"> <cfset this.restsettings.cfclocation = "./cfcdir1,./cfcdir2"> <cfset this.restsettings.skipcfcwitherror = true> </cfcomponent>

The setting this.restsettings.cfclocation contains a list of directories separated by a comma. The directory path can be either absolute or relative path. When the setting this.restsettings.skipcfcwitherror is set to true, the CFC containing compilation errors would be ignored. In this case the CFC – Service2.cfc would be ignored. When the same is set to false, the application wouldn’t be registered and an error message would be displayed. By default it is set to false and hence an error would be thrown while registering the application.

One more thing to note is that, only the directories specified in this.restsettings.cfclocation will be made available as REST services i.e. if there is a CFC in the same directory as Application.cfc then it would not be considered. The current directory needs to be specified explicitly in this setting (this.restsettings.cfclocation = “./cfcdir1,./cfcdir2,.”).

You can download the sample code here.

Comments

Popular posts from this blog

File upload and Progress events with HTML5 XmlHttpRequest Level 2

The XmlHttpRequest Level 2 specification adds several enhancements to the XmlHttpRequest object. Last week I had blogged about cross-origin-requests and how it is different from Flash\Silverlight's approach .  With Level 2 specification one can upload the file to the server by passing the file object to the send method. In this post I'll try to explore uploading file using XmlHttpRequest 2 in conjunction with the progress events. I'll also provide a description on the new HTML5 tag -  progress which can be updated while the file is being uploaded to the server. And of course, some ColdFusion code that will show how the file is accepted and stored on the server directory.

Server sent events with HTML5 and ColdFusion

There are several ways to interact with the server apart from the traditional request\response and refresh all protocol. They are polling, long polling, Ajax and Websockets ( pusherapp ). Of all these Ajax and Websockets have been very popular. There is another way to interact with the server such that the server can send notifications to the client using Server Sent Events (SSE) . SSE is a part of HTML5 spec:  http://dev.w3.org/html5/eventsource/

Adding beforeRender and afterRender functions to a Backbone View

I was working on a Backbone application that updated the DOM when a response was received from the server. In a Backbone View, the initialize method would perform some operations and then call the render method to update the view. This worked fine, however there was scenario where in I wanted to perform some tasks before and after rendering the view. This can be considered as firing an event before and after the function had completed its execution. I found a very simple way to do this with Underscore's wrap method.