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From "Aki Yoshida (JIRA)" <>
Subject [jira] [Commented] (CXF-5339) Introduce WebSocket CXF Transport
Date Tue, 25 Feb 2014 18:52:20 GMT


Aki Yoshida commented on CXF-5339:

Hi Sergery, all,
just committed the early working code in master that uses cxf's http-jetty with an extended
jetty handler that can handle additionally websocket requests so that you can get the idea
of this usage pattern.

Currently, it allows you to open a websocket connection to the root service URL of the service
enabled for websockets, which is made in its destination configuration. Once the socket is
open, you can invoke various operations of that service. And we have the following assumptions:

1. to be able to select the operation and pass additional parameters to it, the request body
must include the request URL (e.g., GET /path…) and any additional headers and body entity
if any.

2. for the client to be able to interpret the response data, the response must return the
headers followed by any body entity. (In my initial commit, the response does not include

3. currently, if jetty-websocket-pkg is found, the extended handler is instantiated even if
the websocket feature is not enabled for the corresponding destination. This extended handler
can handle websocket open requests but rejects opening sockets during the request time if
the websocket feature is not enabled for that destination. 

The reason for this behavior was to allow this enable/disable switching when using ServerFactoryBean
to programatically configure the destination. Allowing to pass this switching parameter to
the destination instantiation seems to require a change in its interface and that appeared
inappropriate. If there is a simple way to pass this parameter to the destination before the
handler is attached, we can separate the instantiation of the handler clearly to force the
extended handler is only instantiated if indeed the websocket feature is available and enabled
for the destination. 

4. the unit test in systests/jaxrs  does simple GET or POST calls and one using StreamingOutput
to push data back to the client continuously. This test is working, however, when it is executed,
there seems to be some issue that results in permGen error later at other tests in systests/jarxs,
 I observed this problem on my OSX setup but not on a ubunthu desktop. So, I am looking into
this issue. Thus, this test is currently set disabled.

regards, aki

> Introduce WebSocket CXF Transport
> ---------------------------------
>                 Key: CXF-5339
>                 URL:
>             Project: CXF
>          Issue Type: New Feature
>          Components: Transports
>            Reporter: Sergey Beryozkin
>            Assignee: Aki Yoshida
> WebSocket transport will likely be supported on the server only. 
> It will allow users, specifically those not working directly with Camel, do Web-Socket
based Web UI targeting CXF endpoints returning some real time info.
> Additionally, hope is it will help revitalise LogBrowser project where having the log
or other events displayed for individual endpoints in real time can be quite cool; supporting
such a feature might help us basically move it into a sub-project   

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