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| |
| <h1>Métricas com MicroProfile <code>@Timed</code></h1> |
| </div> |
| </div> |
| </div> |
| <div class="row"> |
| |
| <div class="col-md-12"> |
| <div id="preamble"> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Este é um exemplo sobre como utilizar as métricas do MicroProfile em TomEE.</p> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_executando_a_aplicação">Executando a aplicação:</h2> |
| <div class="sectionbody"> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-bash" data-lang="bash">$ mvn clean install tomee:run</code></pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>Dentro da aplicação, há um endpoint que vai fornecer o estado do clima para o dia.</p> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_obtendo_o_clima_para_o_dia">Obtendo o clima para o dia:</h2> |
| <div class="sectionbody"> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-bash" data-lang="bash">$ curl -X GET http://localhost:8080/mp-metrics-timed/weather/day/status</code></pre> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_resposta">Resposta:</h2> |
| <div class="sectionbody"> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-text" data-lang="text">Hi, today is a sunny day!</code></pre> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_usando_code_timed_code">Usando <code>@Timed</code></h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>As métricas de MicroProfile tem uma função que se pode usar para rastrear |
| a duração de um evento.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Para utilizar esta função, você deve anotar os métodos dos recursos JAX-RS com <code>@Timed</code>.</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-java" data-lang="java">@Path("/weather") |
| @ApplicationScoped |
| public class WeatherService { |
| |
| @Path("/day/status") |
| @Timed(name = "weather_day_status", absolute = true, |
| displayName = "Weather Day Status", |
| description = "This metric shows the weather status of the day.") |
| @GET |
| @Produces(MediaType.TEXT_PLAIN) |
| public String dayStatus() { |
| return "Hi, today is a sunny day!"; |
| } |
| ... |
| }</code></pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>Existem algumas configurações, como parte do <code>@Timed</code>, que você precisa saber:</p> |
| </div> |
| <div class="paragraph"> |
| <p><strong>String name</strong> Opcional. Define o nome da métrica. Se não for fornecido explicitamente, o nome do objeto anotado é usado.</p> |
| </div> |
| <div class="paragraph"> |
| <p><strong>boolean absolute</strong> Se verdadeiro, usa o nome fornecido como o nome absoluto da métrica. Se falso, ele prefixa o nome do pacote e o nome da classe antes do nome fornecido. O valor padrão é falso.</p> |
| </div> |
| <div class="paragraph"> |
| <p><strong>String displayName</strong> Opcional. Um nome de exibição legível para metadados.</p> |
| </div> |
| <div class="paragraph"> |
| <p><strong>String description</strong> Opcional. Uma descrição da métrica.</p> |
| </div> |
| <div class="paragraph"> |
| <p><strong>String[] tags</strong> Opcional. Matriz do tipo String no formato 'chave=valor' para fornecer etiquetas especiais para uma métrica.</p> |
| </div> |
| <div class="paragraph"> |
| <p><strong>String unit</strong> Unidade da métrica. O valor padrão para <code>@Timed</code> é nanossegundos.</p> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_dados_métricos">Dados Métricos</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Verifique a métrica do medidor fazendo uma solicitação <em>GET</em>:</p> |
| </div> |
| <div class="sect2"> |
| <h3 id="_formato_prometheus">Formato Prometheus:</h3> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-bash" data-lang="bash">$curl -X GET http://localhost:8080/mp-metrics-timed/metrics/application/weather_day_status</code></pre> |
| </div> |
| </div> |
| </div> |
| <div class="sect2"> |
| <h3 id="_resposta_prometheus">Resposta Prometheus:</h3> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-text" data-lang="text"># TYPE application:weather_day_status_seconds summary timer |
| # TYPE application:weather_day_status_seconds_count timer |
| application:weather_day_status_seconds_count 1.0 |
| # TYPE application:weather_day_status_rate_per_second timer |
| application:weather_day_status_rate_per_second 0.0 |
| # TYPE application:weather_day_status_one_min_rate_per_second timer |
| application:weather_day_status_one_min_rate_per_second 0.0 |
| # TYPE application:weather_day_status_five_min_rate_per_second timer |
| application:weather_day_status_five_min_rate_per_second 0.0 |
| # TYPE application:weather_day_status_fifteen_min_rate_per_second timer |
| application:weather_day_status_fifteen_min_rate_per_second 0.0 |
| # TYPE application:weather_day_status_min_seconds timer |
| application:weather_day_status_min_seconds 48352.0 |
| # TYPE application:weather_day_status_max_seconds timer |
| application:weather_day_status_max_seconds 48352.0 |
| # TYPE application:weather_day_status_mean_seconds timer |
| application:weather_day_status_mean_seconds 48352.0 |
| # TYPE application:weather_day_status_stddev_seconds timer |
| application:weather_day_status_stddev_seconds 0.0 |
| # TYPE application:weather_day_status_seconds timer |
| application:weather_day_status_seconds{quantile="0.5"} 48352.0 |
| # TYPE application:weather_day_status_seconds timer |
| application:weather_day_status_seconds{quantile="0.75"} 48352.0 |
| # TYPE application:weather_day_status_seconds timer |
| application:weather_day_status_seconds{quantile="0.95"} 48352.0 |
| # TYPE application:weather_day_status_seconds timer |
| application:weather_day_status_seconds{quantile="0.98"} 48352.0 |
| # TYPE application:weather_day_status_seconds timer |
| application:weather_day_status_seconds{quantile="0.99"} 48352.0 |
| # TYPE application:weather_day_status_seconds timer |
| application:weather_day_status_seconds{quantile="0.999"} 48352.0</code></pre> |
| </div> |
| </div> |
| </div> |
| <div class="sect2"> |
| <h3 id="_formato_json">Formato JSON:</h3> |
| <div class="paragraph"> |
| <p>Para o formato json, adicione o cabeçalho <code>Accept: application/json</code> na requisição.</p> |
| </div> |
| </div> |
| <div class="sect2"> |
| <h3 id="_resposta_json">Resposta JSON:</h3> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-javascript" data-lang="javascript">{ |
| "weather_day_status": { |
| "count": 1, |
| "fifteenMinRate": 0, |
| "fiveMinRate": 0, |
| "max": 48352, |
| "mean": 48352, |
| "meanRate": 0, |
| "min": 48352, |
| "oneMinRate": 0, |
| "p50": 48352, |
| "p75": 48352, |
| "p95": 48352, |
| "p98": 48352, |
| "p99": 48352, |
| "p999": 48352, |
| "stddev": 0 |
| } |
| }</code></pre> |
| </div> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_metadados_de_métrica">Metadados de Métrica</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Uma métrica terá metadados na qual você pode saber mais sobre ele,, como <code>displayName</code>,<code>description</code>, <code>tags</code>, etc.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Verifique os metadados da métrica fazendo uma solicitação HTTP <em>OPTIONS</em>:</p> |
| </div> |
| <div class="sect2"> |
| <h3 id="_solicitação_http_em_options_em">Solicitação HTTP <em>OPTIONS</em></h3> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-bash" data-lang="bash">$ curl -X OPTIONS http://localhost:8080/mp-metrics-timed/metrics/application/weather_day_status</code></pre> |
| </div> |
| </div> |
| </div> |
| <div class="sect2"> |
| <h3 id="_resposta_2">Resposta:</h3> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-javascript" data-lang="javascript">{ |
| "weather_day_status": { |
| "description": "This metric shows the weather status of the day.", |
| "displayName": "Weather Day Status", |
| "name": "weather_day_status", |
| "reusable": false, |
| "tags": "", |
| "type": "timer", |
| "typeRaw": "TIMER", |
| "unit": "nanoseconds" |
| } |
| }</code></pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>Você também pode experimentá-lo usando o <code>WeatherServiceTest.java</code>, disponível no projeto.</p> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_apis_used">APIs Used</h2> |
| <div class="sectionbody"> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p><a href="../../../microprofile-2.0/javadoc/org/eclipse/microprofile/metrics/annotation/Timed.html">org.eclipse.microprofile.metrics.annotation.Timed</a></p> |
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