Implement the Micrometer card for the new dev ui.

Only link the prometheus and json metrics.

Author: cescoffier

extensions/micrometer/deployment/src/main/java/io/quarkus/micrometer/deployment/MicrometerProcessor.java

@@ -28,6 +28,7 @@
 import io.quarkus.arc.processor.Annotations;
 import io.quarkus.arc.processor.AnnotationsTransformer;
 import io.quarkus.arc.processor.InterceptorBindingRegistrar;
+import io.quarkus.deployment.IsDevelopment;
 import io.quarkus.deployment.annotations.BuildProducer;
 import io.quarkus.deployment.annotations.BuildStep;
 import io.quarkus.deployment.annotations.BuildSteps;
@@ -38,7 +39,10 @@
 import io.quarkus.deployment.builditem.nativeimage.ReflectiveClassBuildItem;
 import io.quarkus.deployment.metrics.MetricsCapabilityBuildItem;
 import io.quarkus.deployment.metrics.MetricsFactoryConsumerBuildItem;
+import io.quarkus.devui.spi.page.CardPageBuildItem;
+import io.quarkus.devui.spi.page.Page;
 import io.quarkus.micrometer.deployment.export.PrometheusRegistryProcessor;
+import io.quarkus.micrometer.deployment.export.RegistryBuildItem;
 import io.quarkus.micrometer.runtime.ClockProvider;
 import io.quarkus.micrometer.runtime.CompositeRegistryCreator;
 import io.quarkus.micrometer.runtime.MeterFilterConstraint;
@@ -233,4 +237,23 @@ ReflectiveClassBuildItem createReflectiveBuildItem(DotName sourceAnnotation, Ind
         return ReflectiveClassBuildItem.builder(classes.toArray(new String[0])).build();
     }
 
+    @BuildStep(onlyIf = IsDevelopment.class)
+    public CardPageBuildItem createCard(List<RegistryBuildItem> registries) {
+        var card = new CardPageBuildItem("Micrometer metrics");
+
+        var json = registries.stream().filter(r -> "JSON".equals(r.name())).map(RegistryBuildItem::path).findFirst();
+        var prom = registries.stream().filter(r -> "Prometheus".equals(r.name())).map(RegistryBuildItem::path).findFirst();
+
+        prom.ifPresent(s -> card.addPage(Page.externalPageBuilder("Prometheus")
+                .icon("font-awesome-solid:chart-line")
+                .url(s)));
+
+        json.ifPresent(s -> card.addPage(Page.externalPageBuilder("JSON")
+                .icon("font-awesome-solid:chart-line")
+                .url(s)
+                .isJsonContent()));
+
+        return card;
+    }
+
 }

extensions/micrometer/deployment/src/main/java/io/quarkus/micrometer/deployment/export/JsonRegistryProcessor.java

@@ -37,6 +37,7 @@ public void initializeJsonRegistry(MicrometerConfig config,
             BuildProducer<MicrometerRegistryProviderBuildItem> registryProviders,
             BuildProducer<RouteBuildItem> routes,
             BuildProducer<AdditionalBeanBuildItem> additionalBeans,
+            BuildProducer<RegistryBuildItem> registries,
             NonApplicationRootPathBuildItem nonApplicationRootPathBuildItem,
             JsonRecorder recorder) {
         additionalBeans.produce(AdditionalBeanBuildItem.builder()
@@ -53,6 +54,8 @@ public void initializeJsonRegistry(MicrometerConfig config,
 
         log.debug("Initialized a JSON meter registry on path="
                 + nonApplicationRootPathBuildItem.resolvePath(config.export.json.path));
+
+        registries.produce(new RegistryBuildItem("JSON", nonApplicationRootPathBuildItem.resolvePath(config.export.json.path)));
     }
 
 }

extensions/micrometer/deployment/src/main/java/io/quarkus/micrometer/deployment/export/PrometheusRegistryProcessor.java

@@ -86,6 +86,7 @@ void registerEmptyExamplarProvider(
     @BuildStep
     @Record(value = ExecutionTime.STATIC_INIT)
     void createPrometheusRoute(BuildProducer<RouteBuildItem> routes,
+            BuildProducer<RegistryBuildItem> registries,
             MicrometerConfig mConfig,
             NonApplicationRootPathBuildItem nonApplicationRootPathBuildItem,
             PrometheusRecorder recorder) {
@@ -118,5 +119,7 @@ void createPrometheusRoute(BuildProducer<RouteBuildItem> routes,
                 .routeFunction(pConfig.path + (pConfig.path.endsWith("/") ? "*" : "/*"), recorder.fallbackRoute())
                 .handler(recorder.getFallbackHandler())
                 .build());
+
+        registries.produce(new RegistryBuildItem("Prometheus", nonApplicationRootPathBuildItem.resolvePath(pConfig.path)));
     }
 }

extensions/micrometer/deployment/src/main/java/io/quarkus/micrometer/deployment/export/RegistryBuildItem.java

@@ -0,0 +1,23 @@
+package io.quarkus.micrometer.deployment.export;
+
+import io.quarkus.builder.item.MultiBuildItem;
+
+public final class RegistryBuildItem extends MultiBuildItem {
+
+    private final String name;
+
+    private final String path;
+
+    public RegistryBuildItem(String name, String path) {
+        this.name = name;
+        this.path = path;
+    }
+
+    public String name() {
+        return name;
+    }
+
+    public String path() {
+        return path;
+    }
+}