|By Matt Osbun||
|May 15, 2007 06:30 PM EDT||
Business Rule Validation
Validating input against business rules is generally more in depth than validating data types. It helps to think of this as giving context to your data. A name, address, and date of birth are nothing more than a set of unrelated data. Once you have applied business rules, however, you have a customer. If business rules give your data meaning, business rule validation ensures that your data is given the correct meaning.
Datatype validation objects are much easier to share than business rule validation objects. This sort of validation is very specific to a given task or application. However, since we are breaking validation into two parts, we can rewrite our business rule validation objects as necessary and reuse our datatype validation objects. Object-oriented applications are really nothing more than a group of objects that are communicating with each other. You, the developer, are free to determine which objects will be a part of a given application. Since our validation objects are loosely coupled, meaning one object doesn't rely on another, we can change out objects as we see fit.
As an example, let's assume that in this particular application our customers need to be between the ages of 13 and 18, and they also need to be citizens of the United States. I would create a Validate() method, perhaps in a customer.cfc object, to check to make sure that the birthdate and citizenship fit the specified parameters. Although this has some similarities to our Validate() method above, the differences are worth pointing out. When validating datatypes, the formBean has no idea how the data will be used. It just knows which form the data is to take. A Customer object, however, is not so much concerned with the representation of the data, but whether or not the data presented can be used to create a valid customer for this application.
Putting It All Together
How you put this all together is really up to you and how you construct your applications. Are you a procedural developer who includes a validation template on a form page once a form submission has been detected? No problem. Your validation template might look something like this:
<cfset datatype = CreateObject("component","myApp.formBean").init(argumentcollection=form)>
<cfset customer = CreateObject("component","myApp.customer").init()>
<cfset validationBean = CreateObject("component","myApp.validationBean").init()>
<!--- Do something to display the error messages --->
<!--- No errors. Continue the application --->
Since I use Mach-II for most of my development needs, I would have an event-bean declared in the mach-ii.xml configuration file for this event, and I would use that bean's Validate() method in an event filter, which is where I would also create my validationBean and, if necessary, any object needed for business rule validation.
Form validation isn't one of those tasks that I look forward to in the morning. Not that I particularly dislike it, but it's just one of those chores of Web development. The object then (no pun intended!) is to make form validation as easy, flexible, and reusable as possible without sacrificing accuracy or functionality.
This is one of the strengths of object-oriented programming. Rather than building one monolithic, interdependent application, it's more like building a house with Legos. This allows you to spend less time on development chores, like form validation, and more time deciding how the Legos should fit together for your application.
|Kevin Penny 05/17/07 01:16:50 AM EDT|
Excellent - I've used some validation methods before but this one makes good sense.
My only comment would be to add another method to the validator that would return true/false if there were errors in it like 'HasErrors()' or 'isEmpty()' vs. using the arraylen() - then you could possily change out how you're returning those errors and your checking code won't have to chanage that much. I suppose the code that loops through it would have to be modified if you went from an array to a query type object anyway - but thought I'd mention it.
"We've discovered that after shows 80% if leads that people get, 80% of the conversations end up on the show floor, meaning people forget about it, people forget who they talk to, people forget that there are actual business opportunities to be had here so we try to help out and keep the conversations going," explained Jeff Mesnik, Founder and President of ContentMX, in this SYS-CON.tv interview at 18th Cloud Expo, held June 7-9, 2016, at the Javits Center in New York City, NY.
Jul. 23, 2016 11:45 PM EDT Reads: 1,193
Internet of @ThingsExpo has announced today that Chris Matthieu has been named tech chair of Internet of @ThingsExpo 2016 Silicon Valley. The 6thInternet of @ThingsExpo will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA.
Jul. 23, 2016 11:15 PM EDT Reads: 1,848
When people aren’t talking about VMs and containers, they’re talking about serverless architecture. Serverless is about no maintenance. It means you are not worried about low-level infrastructural and operational details. An event-driven serverless platform is a great use case for IoT. In his session at @ThingsExpo, Animesh Singh, an STSM and Lead for IBM Cloud Platform and Infrastructure, will detail how to build a distributed serverless, polyglot, microservices framework using open source tec...
Jul. 23, 2016 11:00 PM EDT Reads: 2,216
The 19th International Cloud Expo has announced that its Call for Papers is open. Cloud Expo, to be held November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA, brings together Cloud Computing, Big Data, Internet of Things, DevOps, Digital Transformation, Microservices and WebRTC to one location. With cloud computing driving a higher percentage of enterprise IT budgets every year, it becomes increasingly important to plant your flag in this fast-expanding business opportuni...
Jul. 23, 2016 10:15 PM EDT Reads: 2,408
From wearable activity trackers to fantasy e-sports, data and technology are transforming the way athletes train for the game and fans engage with their teams. In his session at @ThingsExpo, will present key data findings from leading sports organizations San Francisco 49ers, Orlando Magic NBA team. By utilizing data analytics these sports orgs have recognized new revenue streams, doubled its fan base and streamlined costs at its stadiums. John Paul is the CEO and Founder of VenueNext. Prior ...
Jul. 23, 2016 09:30 PM EDT Reads: 1,940
A critical component of any IoT project is what to do with all the data being generated. This data needs to be captured, processed, structured, and stored in a way to facilitate different kinds of queries. Traditional data warehouse and analytical systems are mature technologies that can be used to handle certain kinds of queries, but they are not always well suited to many problems, particularly when there is a need for real-time insights.
Jul. 23, 2016 08:45 PM EDT Reads: 1,646
CenturyLink has announced that application server solutions from GENBAND are now available as part of CenturyLink’s Networx contracts. The General Services Administration (GSA)’s Networx program includes the largest telecommunications contract vehicles ever awarded by the federal government. CenturyLink recently secured an extension through spring 2020 of its offerings available to federal government agencies via GSA’s Networx Universal and Enterprise contracts. GENBAND’s EXPERiUS™ Application...
Jul. 23, 2016 08:30 PM EDT Reads: 1,767
"My role is working with customers, helping them go through this digital transformation. I spend a lot of time talking to banks, big industries, manufacturers working through how they are integrating and transforming their IT platforms and moving them forward," explained William Morrish, General Manager Product Sales at Interoute, in this SYS-CON.tv interview at 18th Cloud Expo, held June 7-9, 2016, at the Javits Center in New York City, NY.
Jul. 23, 2016 08:30 PM EDT Reads: 2,017
Internet of @ThingsExpo, taking place November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA, is co-located with the 19th International Cloud Expo and will feature technical sessions from a rock star conference faculty and the leading industry players in the world and ThingsExpo Silicon Valley Call for Papers is now open.
Jul. 23, 2016 08:00 PM EDT Reads: 2,410
Big Data engines are powering a lot of service businesses right now. Data is collected from users from wearable technologies, web behaviors, purchase behavior as well as several arbitrary data points we’d never think of. The demand for faster and bigger engines to crunch and serve up the data to services is growing exponentially. You see a LOT of correlation between “Cloud” and “Big Data” but on Big Data and “Hybrid,” where hybrid hosting is the sanest approach to the Big Data Infrastructure pro...
Jul. 23, 2016 08:00 PM EDT Reads: 1,787
The IoT is changing the way enterprises conduct business. In his session at @ThingsExpo, Eric Hoffman, Vice President at EastBanc Technologies, discussed how businesses can gain an edge over competitors by empowering consumers to take control through IoT. He cited examples such as a Washington, D.C.-based sports club that leveraged IoT and the cloud to develop a comprehensive booking system. He also highlighted how IoT can revitalize and restore outdated business models, making them profitable ...
Jul. 23, 2016 07:15 PM EDT Reads: 1,867
We all know the latest numbers: Gartner, Inc. forecasts that 6.4 billion connected things will be in use worldwide in 2016, up 30 percent from last year, and will reach 20.8 billion by 2020. We're rapidly approaching a data production of 40 zettabytes a day – more than we can every physically store, and exabytes and yottabytes are just around the corner. For many that’s a good sign, as data has been proven to equal money – IF it’s ingested, integrated, and analyzed fast enough. Without real-ti...
Jul. 23, 2016 07:00 PM EDT Reads: 869
I wanted to gather all of my Internet of Things (IOT) blogs into a single blog (that I could later use with my University of San Francisco (USF) Big Data “MBA” course). However as I started to pull these blogs together, I realized that my IOT discussion lacked a vision; it lacked an end point towards which an organization could drive their IOT envisioning, proof of value, app dev, data engineering and data science efforts. And I think that the IOT end point is really quite simple…
Jul. 23, 2016 06:15 PM EDT Reads: 797
With 15% of enterprises adopting a hybrid IT strategy, you need to set a plan to integrate hybrid cloud throughout your infrastructure. In his session at 18th Cloud Expo, Steven Dreher, Director of Solutions Architecture at Green House Data, discussed how to plan for shifting resource requirements, overcome challenges, and implement hybrid IT alongside your existing data center assets. Highlights included anticipating workload, cost and resource calculations, integrating services on both sides...
Jul. 23, 2016 06:00 PM EDT Reads: 1,884
"We are a well-established player in the application life cycle management market and we also have a very strong version control product," stated Flint Brenton, CEO of CollabNet,, in this SYS-CON.tv interview at 18th Cloud Expo, held June 7-9, 2016, at the Javits Center in New York City, NY.
Jul. 23, 2016 05:30 PM EDT Reads: 1,721
The IoT has the potential to create a renaissance of manufacturing in the US and elsewhere. In his session at 18th Cloud Expo, Florent Solt, CTO and chief architect of Netvibes, discussed how the expected exponential increase in the amount of data that will be processed, transported, stored, and accessed means there will be a huge demand for smart technologies to deliver it. Florent Solt is the CTO and chief architect of Netvibes. Prior to joining Netvibes in 2007, he co-founded Rift Technologi...
Jul. 23, 2016 05:00 PM EDT Reads: 939
We're entering the post-smartphone era, where wearable gadgets from watches and fitness bands to glasses and health aids will power the next technological revolution. With mass adoption of wearable devices comes a new data ecosystem that must be protected. Wearables open new pathways that facilitate the tracking, sharing and storing of consumers’ personal health, location and daily activity data. Consumers have some idea of the data these devices capture, but most don’t realize how revealing and...
Jul. 23, 2016 04:00 PM EDT Reads: 1,982
Unless your company can spend a lot of money on new technology, re-engineering your environment and hiring a comprehensive cybersecurity team, you will most likely move to the cloud or seek external service partnerships. In his session at 18th Cloud Expo, Darren Guccione, CEO of Keeper Security, revealed what you need to know when it comes to encryption in the cloud.
Jul. 23, 2016 04:00 PM EDT Reads: 2,305
What are the successful IoT innovations from emerging markets? What are the unique challenges and opportunities from these markets? How did the constraints in connectivity among others lead to groundbreaking insights? In her session at @ThingsExpo, Carmen Feliciano, a Principal at AMDG, will answer all these questions and share how you can apply IoT best practices and frameworks from the emerging markets to your own business.
Jul. 23, 2016 03:45 PM EDT Reads: 1,508
Basho Technologies has announced the latest release of Basho Riak TS, version 1.3. Riak TS is an enterprise-grade NoSQL database optimized for Internet of Things (IoT). The open source version enables developers to download the software for free and use it in production as well as make contributions to the code and develop applications around Riak TS. Enhancements to Riak TS make it quick, easy and cost-effective to spin up an instance to test new ideas and build IoT applications. In addition to...
Jul. 23, 2016 03:30 PM EDT Reads: 1,841