Enterprise Integration for Beginners

If you have ever used WSO2 ESB, you might already know that it is one of the highest performing open source ESB solutions in the integration space. The secret behind it’s performance is the so-called Pass Through Transport (PTT) implementation which handles the HTTP requests. If you are interested in learning about PTT from scratch, you can refer the fololwing article series written by Kasun Indrasiri. Demystifying WSO2 ESB Pass-Through Transport - Part I Demystifying WSO2 ESB Pass-Through Transport - Part II Demystifying WSO2 ESB Pass-Through Transport - Part III If you read through the above mentioned posts, you can get a good understanding about the concepts and the implementation. But one thing which is harder to do is remember all the diagrams in your memory. It is not impossible, but little bit harder for a person with average brain. I have tried to draw a picture to capture all the required information related to the PTT. Here is my drawing on WSO2 ESB PTT.

Messaging has been the fundamental communication mechanism which has been succeeded all over the world. Either it is human to human, machine to human or machine to machine, messaging has been the single common method of communication. There are 2 fundamental mechanisms we used to exchange messages between 2(or more)parties. Synchronous messaging Asynchronous messaging Synchronous messaging is used when the message sender expects a response to the message within a specified time period and waiting for that response to carry out his next task. Basically he “blocks” until he receives the response. Asynchronous messaging means that sender does not expect an immediate response and does not “blocks” waiting for the response. There can be a response or not, but the sender will carry out his remaining tasks. Out of the above mentioned technologies, Asynchronous messaging has been the widely used mechanism when it comes to machine to machine communication where 2 compute