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| |
| <h1>MicroProfile Metrics Metered</h1> |
| </div> |
| </div> |
| </div> |
| <div class="row"> |
| |
| <div class="col-md-12"> |
| <div id="preamble"> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>This is an example on how to use microprofile metrics in TomEE.</p> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_run_the_application">Run the application:</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>Within the application, there is an enpoint that will give you a weather status |
| for the day and week.</p> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_for_the_day_status_call">For the day status call:</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-metered/weather/day/status</code></pre> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_response">Response:</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="_metered_feature">Metered Feature</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>MicroProfile metrics has a feature that can be used to find the rate of |
| requests to a service.</p> |
| </div> |
| <div class="paragraph"> |
| <p>To use this feature you need to annotate the JAX-RS resource method with |
| <code>@Metered</code>.</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-java" data-lang="java">@Path("/weather") |
| @Produces(MediaType.APPLICATION_JSON) |
| @Consumes(MediaType.APPLICATION_JSON) |
| @ApplicationScoped |
| public class WeatherService { |
| |
| @Path("/day/status") |
| @Metered(name = "dailyStatus", |
| unit = MetricUnits.MINUTES, |
| description = "Metrics to daily weather status method", |
| absolute = true) |
| @GET |
| @Produces(MediaType.TEXT_PLAIN) |
| public String dayStatus() { |
| return "Hi, today is a sunny day!"; |
| } |
| ... |
| }</code></pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>There are some configurations, as part of <code>@Metered</code>, that you need to know:</p> |
| </div> |
| <div class="paragraph"> |
| <p><strong>String name</strong> |
| Optional. Sets the name of the metric. If not explicitly given the name of the |
| annotated object is used.</p> |
| </div> |
| <div class="paragraph"> |
| <p><strong>boolean absolute</strong> |
| If true, uses the given name as the absolute name of the metric. If false, |
| prepends the package name and class name before the given name. Default value |
| is false.</p> |
| </div> |
| <div class="paragraph"> |
| <p><strong>String displayName</strong> |
| Optional. A human-readable display name for metadata.</p> |
| </div> |
| <div class="paragraph"> |
| <p><strong>String description</strong> |
| Optional. A description of the metric.</p> |
| </div> |
| <div class="paragraph"> |
| <p><strong>String[] tags</strong> |
| Optional. Array of Strings in the <key>=<value> format to supply special tags |
| to a metric.</p> |
| </div> |
| <div class="paragraph"> |
| <p><strong>boolean reusable</strong> |
| Denotes if a metric with a certain name can be registered in more than one |
| place. Does not apply to gauges.</p> |
| </div> |
| <div class="paragraph"> |
| <p><strong>String unit</strong> |
| Unit of the metric. Default for <code>@Metered</code> is nanoseconds.</p> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_metric_data">Metric data</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Check the Metered metric doing a <em>GET</em> request:</p> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_prometheus_format">Prometheus format:</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-metered/metrics/application/dailyStatus</code></pre> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_response_2">Response:</h2> |
| <div class="sectionbody"> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-text" data-lang="text"># TYPE application:daily_status_seconds_count meter |
| application:daily_status_seconds_count 1.2E-7 |
| # TYPE application:daily_status_rate_per_second meter |
| application:daily_status_rate_per_second 0.0 |
| # TYPE application:daily_status_one_min_rate_per_second meter |
| application:daily_status_one_min_rate_per_second 1.3376002644204984E-19 |
| # TYPE application:daily_status_five_min_rate_per_second meter |
| application:daily_status_five_min_rate_per_second 3.5942838529305413E-20 |
| # TYPE application:daily_status_fifteen_min_rate_per_second meter |
| application:daily_status_fifteen_min_rate_per_second 3.4665766454142955E-21</code></pre> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_json_format">JSON Format:</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>For json format add the header <code>Accept: application/json</code> to the request.</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-javascript" data-lang="javascript">{ |
| "dailyStatus": { |
| "count": 2, |
| "fifteenMinRate": 5.77762774235716e-14, |
| "fiveMinRate": 5.990473088217569e-13, |
| "meanRate": 0, |
| "oneMinRate": 2.229333774034164e-12, |
| "unit": "minutes" |
| } |
| }</code></pre> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_metric_metadata">Metric metadata</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>A metric will have a metadata so you can know more information about it, like <code>displayName</code>, <code>description</code>, <code>tags</code>, etc.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Check the metric metadata doing a <em>OPTIONS</em> request:</p> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_request">Request</h2> |
| <div class="sectionbody"> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-bash" data-lang="bash">$ curl -X OPTIONS http://localhost:8080/mp-metrics-metered/metrics/application/dailyStatus</code></pre> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_response_3">Response:</h2> |
| <div class="sectionbody"> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-javascript" data-lang="javascript">{ |
| "dailyStatus": { |
| "description": "Metrics to daily weather status method", |
| "displayName": "", |
| "name": "dailyStatus", |
| "reusable": false, |
| "tags": "", |
| "type": "meter", |
| "typeRaw": "METERED", |
| "unit": "minutes" |
| } |
| }</code></pre> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_test_the_application">Test the application:</h2> |
| <div class="sectionbody"> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-bash" data-lang="bash">$ mvn test</code></pre> |
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