Conditional GETs are a feature of the HTTP specification that provide a way for web servers to tell browsers that the response to a GET request hasn’t changed since the last request and can be safely pulled from the browser cache,In this post i have shown how to achieve this functionality.
Rchart is ruby port of the slick pChart charting library.Using Rchart we can develop various format of chart. Line,Cubic Curve,Bar,Pie,Filled Line,Stacked Bar chart and many more. More Info available here.
Amazon Simple Queue Service (Amazon SQS) is a distributed queue messaging service. The idea of SQS is to remove the direct associations between producer and consumer and act as mediator between them.Ruby libraries like right-aws,sqs etc.helps to achieve using SQS.
To know more about how it is implemented visit SQS using Ruby.
Nailgun is used to preload JVM so no need to load JVM on executing java.Since many ruby/rails application/plugin uses java library.To improve performance of application we can use nailgun. More info you can find here.