java - How to log performance result of Restful API call using dropwizard as a framework? -

i followed link first rest api create restful api.

i can view response on hitting url : http://localhost:8080/hello-world?name=xxx.

now want test performance of api using completion service , log response time each hit in human readable format.

how can achieve this?

this easy do. there 2 methods that:

1. do metrics or logging. in resource, can use metrics created , write out whatever want, e.g:

    @get  public string hello() {      timer timer = service.timer("test");      try(context t = timer.time()) {         return "hello world";     }  } 

alternatively measure time , log somewhere, e.g:

    @get     public string hello() {         long currenttimemillis = system.currenttimemillis();         try {             return "hello world";         } {             log.info("request took: " + (system.currenttimemillis() - currenttimemillis) + " ms");         } } 

the dw alternative of doing use timed annotation, like:

@get @timed(name="wohoho") public string hello() {     return "hello world"; } 

this equal manual approach (the name of metric "wohoho").

additionally need report on metrics, example this:

consolereporter.forregistry(environment.metrics()).build().start(10, timeunit.seconds); 

this report every ten seconds, , result looks like:

-- timers -------------------------------------------- dw.helloresource.wohoho              count = 9          mean rate = 0.13 calls/second      1-minute rate = 0.11 calls/second      5-minute rate = 0.03 calls/second     15-minute rate = 0.01 calls/second                min = 0.16 milliseconds                max = 5.41 milliseconds               mean = 0.90 milliseconds             stddev = 1.43 milliseconds             median = 0.46 milliseconds               75% <= 0.59 milliseconds               95% <= 5.41 milliseconds               98% <= 5.41 milliseconds               99% <= 5.41 milliseconds             99.9% <= 5.41 milliseconds 

and that's have do.

using metrics preferred way, because e.g. submit graphite , plot performance on time among other things.

hope helps,

artur