Blogs
Load Testing is one of the major aspect which we all do for our applications, especially for those which have publicly available pages and has very heavy traffic. JMeter is a very commonly used tool for doing load testing. As developers, it is a very good tool to have in our skill set. However we, as lazy productive...
We had a requirement in a recent project to expose some of the functionality we had via a JSON API. The functionality needed to be secure, as was the initial web interface which exposed the functionality. We were using Spring Security for the security aspect of our application. The spring security plugin, together with a secured...
We were having a crisis on our project the other day. The VPS on which we were running our application had some issues with kernel and Tomcat, for that matter, any java process was running unpredictably. Tomcat would explode the WAR file once in a while and even if it did, it would just pause at "Deploying app.war" forever. After spending...
The web application we are developing at the moment interacts with quite a few third party services via REST calls. Most of the third party services use UTF-8 encoding and there was no issues with using the URLCodec, that grails provides out of the box. However, one of the applications our application interacts with, was using ISO-8859-1...
In one of our projects, we are using a webflow for an order wizard. We needed to track the number of users converting a draft to a confirmed order using Google Analytics. This would have been simple if the URLs were different for each step. However, that is not the way webflows work and a similar URL is generated for multiple steps. After...
We have been coming across a certain use case in a couple of projects that the Email credentials/settings used for sending email should be different based on the from address. This is because the applications act as software services that are used by different organizations, which operate in the same business. And each needed their own...
We have a setup where a backend thread, fired by the Spring Events, does some processing, generates a PDF and emails the result to the user. The code we were using to generate the HTML from a GSP to be converted to a PDF using iText was as follows : [java] def webRequest = RequestContextHolder.getRequestAttributes() ...
We had a requirement that a template PDF which had Acroform fields had to be pre-populated (like name, email id etc) and sent to the end user so that he/she only needed to fill in the details which were expected to be filled by him/her. After going through the iText library, we found that the PdfStamper class was the best way to go...
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 files, which were direct screenshots of the...