Access logs for Websocket APIs

[rmsamitha]

Problem

Logs related to WebSocket API invocations should be able to be enabled in WSO2 API Manager. These logs should allow to monitor WebSocket API invocations and debug/troubleshoot issues that may arise.

Solution

Websocket access logs are implemented by overriding io.netty.handler.logging.LoggingHandler and adding it to the websocket pipeline.

These Access logs are printed only if the related configurations are added to log4j2.properties file and there can be slight performance impact when the access logs are enabled. So it is recommended not to enable Websocket access logs if there is no requirement, in production environments.