I had a few ideas I put together and would appreciate some feedback.  A lot of it revolves around Java 8 but I kept all of the extensions themselves at Java 7.  The main goal of Java 8 was to make constructing HttpHandlers easier when you delegate to other handlers.

Example:

Handlers.routing()

            .add(Methods.GET, "/messages", HandlerBuilder


                .create(CustomHandlers.json(Messages::getMessages))


                .wrap(CustomHandlers::timing, "getMessages")


                .wrap(BlockingHandler::new)
             .build()) 

Here is my branch https://github.com/billoneil/undertow/tree/feature/ext

Here is the entry point to an example that puts it all together. https://github.com/billoneil/undertow/blob/feature/ext/ext/examples/src/main/java/io/undertow/ext/examples/rest/RestServer.java

Please excuse the boring example I couldn't think of anything interesting. 

If you run it locally


curl -X POST localhost:8080/messages/optional -d '{"title": "Optional", "message": "Using optional"}'
{"success":true}

curl -X POST localhost:8080/messages/lambda -d '{"title": "Lambda", "message": "Using Lambda"}'
{"success":true}

curl -X POST localhost:8080/messages -d '{"title": "Method References", "message": "Using method references"}'
{"success":true}

curl -X GET localhost:8080/messages
[
  • {
    • title: "Optional",
    • message: "Using optional"
    },
  • {
    • title: "Lambda",
    • message: "Using Lambda"
    },
  • {
    • title: "Method References",
    • message: "Using method references"
    }
]

curl -X GET localhost:8080/info/metrics
{
  • version: "3.0.0",
  • gauges: { },
  • counters: { },
  • histograms: { },
  • meters: 
    {
    • response.status.code.200: 
      {
      • count: 8,
      • m15_rate: 21.787938213503697,
      • m1_rate: 6.5304307794735275,
      • m5_rate: 18.017228623496,
      • mean_rate: 4.457584495510739,
      • units: "events/minute"
      }
    },
  • timers: 
    {
    • createMessageLambda: 
      {
      • count: 1,
      • max: 1.169,
      • mean: 1.169,
      • min: 1.169,
      • p50: 1.169,
      • p75: 1.169,
      • p95: 1.169,
      • p98: 1.169,
      • p99: 1.169,
      • p999: 1.169,
      • stddev: 0,
      • m15_rate: 0.059490549916151686,
      • m1_rate: 0.1812199126454006,
      • m5_rate: 0.14211865026090975,
      • mean_rate: 0.5343847126926461,
      • duration_units: "milliseconds",
      • rate_units: "calls/minute"
      },
    • createMessageMethodReferences: 
      {
      • count: 1,
      • max: 0.648,
      • mean: 0.648,
      • min: 0.648,
      • p50: 0.648,
      • p75: 0.648,
      • p95: 0.648,
      • p98: 0.648,
      • p99: 0.648,
      • p999: 0.648,
      • stddev: 0,
      • m15_rate: 0.05982197273776584,
      • m1_rate: 0.19696865690816925,
      • m5_rate: 0.14450714325124409,
      • mean_rate: 0.5343791108783038,
      • duration_units: "milliseconds",
      • rate_units: "calls/minute"
      },
    • createMessageOptional: 
      {
      • count: 1,
      • max: 94.579,
      • mean: 94.579,
      • min: 94.579,
      • p50: 94.579,
      • p75: 94.579,
      • p95: 94.579,
      • p98: 94.579,
      • p99: 94.579,
      • p999: 94.579,
      • stddev: 0,
      • m15_rate: 10.678581251856285,
      • m1_rate: 2.0852873214053433,
      • m5_rate: 8.456257076624562,
      • mean_rate: 0.5343875445806129,
      • duration_units: "milliseconds",
      • rate_units: "calls/minute"
      },
    • getMessages: 
      {
      • count: 3,
      • max: 9.809999999999999,
      • mean: 3.6413333333333333,
      • min: 0.514,
      • p50: 0.6,
      • p75: 9.809999999999999,
      • p95: 9.809999999999999,
      • p98: 9.809999999999999,
      • p99: 9.809999999999999,
      • p999: 9.809999999999999,
      • stddev: 5.342395093339066,
      • m15_rate: 0.18767034671569677,
      • m1_rate: 1.2185014871528328,
      • m5_rate: 0.49650226189858143,
      • mean_rate: 1.6030845484157583,
      • duration_units: "milliseconds",
      • rate_units: "calls/minute"
      },
    • getMetrics: 
      {
      • count: 0,
      • max: 0,
      • mean: 0,
      • min: 0,
      • p50: 0,
      • p75: 0,
      • p95: 0,
      • p98: 0,
      • p99: 0,
      • p999: 0,
      • stddev: 0,
      • m15_rate: 0,
      • m1_rate: 0,
      • m5_rate: 0,
      • mean_rate: 0,
      • duration_units: "milliseconds",
      • rate_units: "calls/minute"
      }
    }
}






On Thu, Jul 3, 2014 at 9:28 AM, Bill O'Neil <bill@dartalley.com> wrote:
I have mostly just been getting familiar with undertow for side projects.  I would be happy to share anything I come up with though to get some feedback.


On Wed, Jul 2, 2014 at 10:44 AM, Jason Greene <jason.greene@redhat.com> wrote:
On Jul 2, 2014, at 9:02 AM, Bill O'Neil <bill@dartalley.com> wrote:

> Is there any plan to open up an undertow-ext library where the community can make small modules that hook into 3rd party dependencies?  For example, an HttpHandler that uses Jackson/Gson to serialize to json and set appropriate headers, or an HTML templating framework for rendering HTML.
>
> Would you prefer these to be hosted by 3rd parties instead?

I think this is a great idea. Are you interested in being a maintainer of such a thing?

--
Jason T. Greene
WildFly Lead / JBoss EAP Platform Architect
JBoss, a division of Red Hat