[jax-rs-spec users] [jsr339-experts] Re: Fwd: [javaee-spec users] [jsr342-experts] Server-Sent Events in Java EE 8

From: Bill Burke <>
Date: Thu, 22 May 2014 12:03:35 -0400

I just hope that you aren't adding support for something that isn't
really that well adopted. Are you sure SSE is something people use. I
thought Web Sockets was much more prevalent.

On 5/22/2014 10:54 AM, Sergey Beryozkin wrote:
> Hi Santiago
> Thanks for the link.
> So hopefully SSE will be supported in JAX-RS 2.1.
> What concerns me is this: appears like the decision to use a 'special'
> media type is already taken, the way the presentation talks about it,
> and as such the expectations are already there in EE8 team that yeah,
> this is how it will work.
> I hope we can take a different approach. @Produce will define a format
> of the event stream field. The same way it defines the content of HTTP
> payload which is part of the bigger HTTP response. The acceptance of
> text/event-stream will be enabled by an SSE enabler annotation. IMHO
> this will be more JAX-RS friendly. We would even use Response with
> EventSource. Open question: how to tell the consumer about a field
> format, guess SSE allows for custom headers/extensions, may be 'comment'
> can be used as a container.
> If the 'special' @Produces does stay then we will not help users at all
> because the format of the field will have no associated metadata, so the
> field can be a plain text or JSON, the 3rd party client won't know. That
> said, perhaps in this case, EventOutput would have a way to set
> Content-Type of the field. This approach still looks less JAX-RS friendly
> Cheers, Sergey
> On 22/05/14 14:35, Santiago Pericas-Geertsen wrote:
>> Dear Experts,
>> I'm forwarding a message from Bill Shannon in relation to SSE in EE 8.
>> Please take a look as this may have an impact on our future work.
>> -- Santiago
>> Begin forwarded message:
>>> *From: *Bill Shannon <
>>> <>>
>>> *Subject: **[javaee-spec users] [jsr342-experts] Server-Sent Events in
>>> Java EE 8*
>>> *Date: *May 21, 2014 at 8:14:46 PM EDT
>>> *To: *
>>> <>
>>> *Reply-To: *
>>> <>
>>> One of the items we'd like to add support for in Java EE 8 is
>>> Server-Sent Events. We've considered several options for how
>>> to add this support and concluded that JAX-RS seems like the best
>>> choice. Santiago (JAX-RS spec lead) has written up the options
>>> and our conclusion here:
>>> Please let us know if you have any concerns with including SSE
>>> support in JAX-RS. Otherwise, expect to see this proposed in the
>>> next JAX-RS JSR, to be submitted this summer.
>>> Thanks.
>>> Bill

Bill Burke
JBoss, a division of Red Hat