How to start Metrics Enabled HTTP Server from a Verticle

[Du M]

Hi,

We're trying to start a HTTP Server inside a Verticle and would like to enable Metrics for it.

If we use the Vertx instance that is a member variable of Verticle, it does not have Metrics enabled. If we use following vertx instance  - 

Vertx vertx = Vertx.vertx(new VertxOptions().setMetricsOptions(

                           new DropwizardMetricsOptions().setEnabled(true)
                                .addMonitoredHttpServerUri(new Match().setValue("/"))
                                .addMonitoredHttpServerUri(new Match().setValue("/eventbus/*").setType(MatchType.REGEX))));

this instance does not seem to start the HTTP Server.

Any ideas?

[Thomas SEGISMONT]

You need both:

- a verticle creating the http server

- vertx options with metrics enabled

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[Du M]

Hi,

Thanks for reply.

How to do this?

I have tried following, none of them seem to work - 

1. Create a new Vertx instance using Vertx.vertx() with Metrics Options in the verticle itself, and use it to start HTTP Server. This does not seem to start HTTP Server.
2. Create a new Vertx instance using Vertx.vertx() with Metrics Options and execute it in Worker Threadpool, and use it to start HTTP Server. This gives exception below -

[vert.x-eventloop-thread-4] WARN io.netty.channel.nio.NioEventLoop - Unexpected exception in the selector loop.

java.io.IOException: Invalid argument

        at sun.nio.ch.KQueueArrayWrapper.kevent0(Native Method)

        at sun.nio.ch.KQueueArrayWrapper.poll(KQueueArrayWrapper.java:198)

        at sun.nio.ch.KQueueSelectorImpl.doSelect(KQueueSelectorImpl.java:117)

        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)

        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)

        at io.netty.channel.nio.NioEventLoop.select(NioEventLoop.java:731)

        at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:391)

        at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:873)

        at java.lang.Thread.run(Thread.java:748)

On Tuesday, 10 October 2017 22:53:56 UTC+5:30, Thomas Segismont wrote:

You need both:

- a verticle creating the http server

- vertx options with metrics enabled

2017-10-10 16:13 GMT+02:00 Du M <dumdumdu...@gmail.com>:

Hi,

We're trying to start a HTTP Server inside a Verticle and would like to enable Metrics for it.

If we use the Vertx instance that is a member variable of Verticle, it does not have Metrics enabled. If we use following vertx instance  - 

Vertx vertx = Vertx.vertx(new VertxOptions().setMetricsOptions(

                           new DropwizardMetricsOptions().setEnabled(true)
                                .addMonitoredHttpServerUri(new Match().setValue("/"))
                                .addMonitoredHttpServerUri(new Match().setValue("/eventbus/*").setType(MatchType.REGEX))));

this instance does not seem to start the HTTP Server.

Any ideas?

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[Thomas SEGISMONT]

Without more details I can't say. Please put together a sample project on GitHub

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