I'm implementing a GWT application in which I need both client-initiated RPC requests to the server as well as server-initiated notifications to the clients. Because I'm wary of the "two-HTTP-connection limit", I'm considering making all requests go through a Comet-style channel (even the RPC calls). Rather than create this channel myself, I'm wondering if the Errai Bus would satisfy my needs. However, I don't see any description in Errai's documentation about its usage of HTTP connections, or any mention of the two-HTTP-connection limit. Can someone describe how the Errai Bus works under the covers, especially with regards to HTTP connections? Thanks.