limitations of running WSO2 Carbon 4.x and WSO2 Carbon based products in webapp mode?

StackOverflow https://stackoverflow.com/questions/17122096

Question

WSO2 Carbon is not officially supported in webapp mode (see the selected answer here). However, I have no choice - If I want to run carbon, it must be run in webapp mode.

There are some detailed instructions here for setting up carbon 4.x in webapp mode.

I am concerned is that standalone mode is strongly recommended by WSO2.

My Questions are: What are the limitations:

  1. when running Carbon 4.x in webapp mode?
  2. when running other Carbon based products (e.g. ESB, AS, etc) in webapp mode?

If possible, please provide a detailed list of the limitations.

Was it helpful?

Solution

Limitations:

  1. When you take the ESB, as you might have seen it exposes ports 8280/8243 (HTTP/HTTPS) in addition to 9763/9443 which is exposed through the servlet transport. In the case of ESB you need (and want) to use port 8280/8243 when you're interacting with the ESB because those are the two non-blocking high performant transports. When you deploy ESB on top of another web container, you're limited by the servlet transports provided by the container. So we can't get the desired performance out of the ESB for proxying and other scenarios.
  2. Complexities involving using web container functionalities. Carbon has its own clustering/caching/security etc... infrastructure. When you deploy Carbon as a webapp then we should look at supporting all those functions provided by the container for different containers. Which is complex, not consistent and in some cases sub-optimal

IMHO those were the two most important factors why it's discouraged to deploy Carbon on top of other containers. Going with a standalone deployment approach it has contributed immensely to not include web container specific "hacks" into the platform to get things done and have a much cleaner consistent platform.

OTHER TIPS

One issues with deploying Carbon in web-app mode is that this deployment model is not supported by WSO2. I will add more issues to this answer as I encounter them...

AFAIK, webapp is not supported... Please refer this thread :Running WSO2 Carbon as Web Application in Tomcat

Regards,

Mohan

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