My day with node.js

It’s been a long time since I had FUN with a programming language. Today I had decided to take some time and dig nose deep into node.js. I’ve written much with Javascript before, and have always wanted to create RESTful services with something that wasn’t PHP, and from what i’ve heard node.js is a nice transition for a developer wanting to learn a new thing.

So, step 1 was to get some revision loaded up. Instead of apt-get or yum installing myself a version, I decided to get v8.11.3 (at this time is LTS) and install it in /usr/share/node. I symlinked all necessary executables to /usr/bin, and node -v’d myself to satisfactory execution.

I did the obligatory hello-world.js, and a subsequent cURL later to localhost:3000 got me really tickled. Being familiar with Javascript this was a confusing walk in the park. I decided to go ahead and github/public my musings and ramblings and set some goals, as I do have a destination with this.

002-is-global.js: First thing was to find out if I have access to global variables. Yes. Yes I do. Thanks Javascript for still allowing this to happen.

003-what-is-req-and-res.js: Then, with this res and req, I had to find out the contents of them. There had to be a Data::Dumper or var_dump somehow, and (since Javascript) there was the trusty console.log() to inspect these variables. #awesome

004-rest-verbs.js: Cause we’re building something RESTful, I needed to think if I had access to some Verbs. Low and behold, after skimming the node.js api for http the .method was smack in my face. It really came down to RTFM.

005-list-add-remove.js: I just took off from there. We have access to a global, we can make logic decision based on methods passed, and now we can pass a querystring and parse it up! At this point things were looking fairly awesome.

006-post-list-add-remove.js: We can’t use querystring for long, so I had to convert it to data passed in the request. After reading how Events and EventEmitter worked, this seemed quite natural. Got into some try/catching as well, and now explicitly taking in JSON data as well. Just a couple steps away from what we need to actually do!

007-list-with-expired-items.js: At this point we needed to store data with some “life” tied to it. i had to kick in some setInterval logic to scan the list of items that we’re storing and cull any that have expired. I also approached a level of pride in my code by making it look more presentable. At this point of excitement I had decided to develop a dataloader to “test” how well it can load and purge data, as well as overall node.js performance.

008-persistent-executed-list.js: In loading node.js and terminating it I had to think ahead in “what to do if the process bombs out with data stored in it”. At this point I had plugged in two separate items:
A) process.on(), to hook in synchronous routines that saved data and performed any cleanup, and rightfully aborted the process.
B) fs.readFile() fs.writeFile, so that I can dump the “local memory storage” timely to disk in 30 seconds interval.

Overall, this was awesome. I wanted to be able to create a RESTful service quick, timely, and efficiently, with little “new knowledge” required from previous Javascript development, and this was exactly what I got.

Fallon Chamberlin, b. 21/Mar/1986, d.19/Jun/2011

Fallon L. Chamberlin, 25, of Jamestown, died unexpectedly Sunday, June 19, 2011, at Hamot Medical Center, Erie, Pa.

She was born March 21, 1986, in Jamestown, the daughter of Robert and Dixie Taft Chamberlin of Falconer. Fallon was her mother’s “Baby Girl” and “Best Friend.”
A Chautauqua County resident all of her life, she was a 2004 graduate of Falconer Central School, received her associates degree in Early Childhood Development from Jamestown Community College and was continuing her education at Jamestown Community College in the registered nursing program.

She was employed at Ruby Tuesday’s as a server and was presently the director of the Falconer Central School marching band’s color guard.
Fallon enjoyed life, some of her favorite things being, fishing, camping, traveling, music, marching band and spoiling her nephew, Robert Patrick Chamberlin.
Sister of Justin (Cassandra) Chamberlin of Salamanca; fiance of Logan Stakelum of Jamestown; granddaughter of Emmeline Spaulding of Frewsburg, John and Bertha Taft of Gerry, and the late Frederick Chamberlin. She is also survived by aunts, uncles and cousins.

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