PassThrough Transport is a non-blocking HTTP transport implementation based on HTTP Core NIO, and is the default HTTP transport shipped with WSO2 ESBEnterprise Integrator (WSO2 EI). Although the PassThrough Transport is somewhat similar to the NHTTP transport, it overcomes all the limitations of the NHTTP transport and provides a significant performance gain. The PassThrough Transport also has a simpler and cleaner model for forwarding messages back and forth.
...