Tharsanan Kurukulasingam

Streaming SQL allows for specifying stream processing applications to use an intuitive SQL-based interface. Increasingly Streaming SQL has been widely used by the stream processing community to develop stream processing applications. Siddhi Query Language (SiddhiQL) is one of the examples of Streaming SQL. Siddhi QL has its own stream processor compiler, which is built using Java language. The problem with the existing compiler is that it uses interpreter style compilation and generates a sync-type stream processor. Because the existing compiler creates sync-type architecture, the created stream processor cannot use all its hardware resources to increase the performance. Async type stream processors will be a better solution in terms of performance for higher computational tasks. But, it does not guarantee that Async type architecture will give us better performance than sync every time.

If our stream processor tasks are minimal, then using Async will introduce more threading overheads, reducing the performance compared to sync usage in that situation.

So, our task is to create a static compiler for the Siddhi Query Language and provide a hybrid architecture, sync and Async, that can perform well in different situations.

Implemented a personal website using a physics engine. Viewers can look at my professional details in a fun and interactive way. It's a responsive UI, but I recommend using a widescreen(PC), yet it works fine in mobiles also.

Cpachecker is a framework that can be used as a software verification tool for C programs. We can use Cpachecker locally by command-line interface or in the cloud using the web client. Even though Cpachecker is suitable for software verification and program analysis, a developer cannot use it with an IDE. This drawback massively decreases the usability of Cpachecker.

The solution for this problem is to create a plugin that can use Cpachecker inside the IDE. I designed and developed the plugin from scratch. The plugin can use locally installed Cpachecker or a cloud service. User can customize the Cpachecker parameters using a configuration UI.

Problem
Sysco LABS is a leading software company in Sri Lanka. They are using AWS for cloud computing service. As Sysco LABS is a big organization, they use 100s of EC2, S3 instances. Handling everything and keeping track of which instances are connected to which environment is very challenging with AWS console or their web interface.

Solution
We developed a web portal in which you can
• view instances' state
• start, stop, restart servers
• can see which instance belongs to which environment, project, or sub-project in a tree-like graphic
• view servers that do not belong to any projects but running.

We developed an authentication and authorization mechanism in which only authenticated persons can log in, and authorized persons can edit or change the state of servers.