Blogs

Recently I was working on webhooks (which are getting quite popular for sending notifications to other applications using HTTP POST methods). MD5 encoded content is heavily used in webhooks for security concern. My purpose of writing this blog is neither to explain MD5 nor webhooks. But just to show you – 1. a quicker way […]

I had earlier written a post on how to use QR Code to take care of identification of printed documents and updating the DB based on the QR Code detection. However, we had to abandon the use of QR Codes in the document because the library wasn’t performing reliable, even with QR Codes from image […]

Peter Ledbrook took an amazing session on tuning your grails Application here at SpringOne2GX in Chicago. In this session Peter talked about tuning the various aspects about in your application starting from server side optimizations to the caching and zipping of static resources. One of the most important thing that Peter pointed out was to […]

Working with groovy is really a cake walk. Whenever I get some free time I try to know more about it. Today I was just wondering on the net and I found some cool tips to execute groovy file in grails. There are so many other ways available to run groovy script in grails, I […]

Reloading configuration from external Configuration files without restarting the web container and putting the configuration file external to war file. I Used config.merge and new ConfigSlurper().parse( ) to merge the external configuration into the running application’s configuration

I didn’t know this earlier, but found a very good feature of GORM – ‘bypass’ constraints or ‘customize’ validation while saving a domain-object. I am not sure if there’s any name for this feature. But I am naming it as ‘bypass constraints’. [groovy] if(domainObject.validate([‘field1’, ‘field2’])){ domainObject.save(validate:false, flush:true) } [/groovy] Let’s discuss it with a use […]

Hi, In my recent grails project, i needed to check the occurrence of a word in a string. I could have used contains() method of groovy , but the problem with contains() is that it also matches the word if the word is contained as a substring in any word. I searched a lot, but […]

Many times, we need to get the absolute URL of the site/application. One such case is when we are sending out links to the application in emails. The default Config.groovy file provided by Grails has a property with the name grails.serverURL. I have typically used it to get absolute URL (environment specific)  of the site […]

Sometimes we need to retrieve the result on the basis of some regular expression pattern which could be applied to a column. In such situations its better to use a rlike method provided by Grails CreateCriteria. Using rlike method it’s easy to retrieve Result based upon the Required Pattern. rlike Method is Similar to like, […]

I have been working on grails for quite some time now. As a beginner, I had doubts about where to place the business logic in grails. Seeing the CRUD, one can easily be misled into putting most of the code in the actions, but as the code base goes bigger, it becomes difficult to manage […]

In a use case, I needed to import excel spreadsheet and save the data in the database, that was when I came across grails’ excel import plugin. All I had to do was install the plugin and start using it. No Fuss. I created a class in my src/groovy folder [groovy] import org.grails.plugins.excelimport.* class StudentImportXLS […]

Video define new element in html 5. video play without third party plugins as Apple Quict Time and Adobe Flash player.The video element is dectect to be usable without any detection script. You can specify multi video file and browser that support html 5 video use choose the base on what video format they support. […]