feat: observability support for JVM (#3051)

fixes: #3041
TBD54566975 · Oct 10, 2024 · db0ca7f · db0ca7f
1 parent 85c38ae
commit db0ca7f
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Showing 5 changed files with 35 additions and 6 deletions.
diff --git a/examples/java/time/src/main/java/ftl/time/Time.java b/examples/java/time/src/main/java/ftl/time/Time.java
@@ -2,14 +2,25 @@
 
 import java.time.OffsetDateTime;
 
+import io.opentelemetry.api.metrics.LongCounter;
+import io.opentelemetry.api.metrics.Meter;
 import xyz.block.ftl.Export;
 import xyz.block.ftl.Verb;
 
 public class Time {
+    final LongCounter counter;
+
+    public Time(Meter meter) {
+        counter = meter.counterBuilder("time.invocations")
+                .setDescription("The number of time invocations")
+                .setUnit("invocations")
+                .build();
+    }
 
     @Verb
     @Export
-    public static TimeResponse time() {
+    public TimeResponse time() {
+        counter.add(1);
         return new TimeResponse(OffsetDateTime.now());
     }
 }
diff --git a/jvm-runtime/ftl-runtime/common/deployment/pom.xml b/jvm-runtime/ftl-runtime/common/deployment/pom.xml
@@ -23,6 +23,10 @@
             <groupId>io.quarkus</groupId>
             <artifactId>quarkus-rest-jackson-deployment</artifactId>
         </dependency>
+        <dependency>
+            <groupId>io.quarkus</groupId>
+            <artifactId>quarkus-opentelemetry-deployment</artifactId>
+        </dependency>
         <dependency>
             <groupId>io.quarkus</groupId>
             <artifactId>quarkus-agroal-spi</artifactId>

diff --git a/...ck/ftl/deployment/BannerConfigSource.java → ...ck/ftl/deployment/StaticConfigSource.java b/...ck/ftl/deployment/BannerConfigSource.java → ...ck/ftl/deployment/StaticConfigSource.java
@@ -4,9 +4,10 @@
 
 import org.eclipse.microprofile.config.spi.ConfigSource;
 
-public class BannerConfigSource implements ConfigSource {
+public class StaticConfigSource implements ConfigSource {
 
     public static final String QUARKUS_BANNER_ENABLED = "quarkus.banner.enabled";
+    final static String OTEL_METRICS_ENABLED = "quarkus.otel.metrics.enabled";
 
     @Override
     public Set<String> getPropertyNames() {
@@ -15,14 +16,19 @@ public Set<String> getPropertyNames() {
 
     @Override
     public String getValue(String propertyName) {
-        if (propertyName.equals(QUARKUS_BANNER_ENABLED)) {
-            return "false";
+        switch (propertyName) {
+            case (QUARKUS_BANNER_ENABLED) -> {
+                return "false";
+            }
+            case OTEL_METRICS_ENABLED -> {
+                return "true";
+            }
         }
         return null;
     }
 
     @Override
     public String getName() {
-        return "Quarkus Banner";
+        return "Quarkus Static Config Source";
     }
 }
diff --git a/...ent/src/main/resources/META-INF/services/org.eclipse.microprofile.config.spi.ConfigSource b/...ent/src/main/resources/META-INF/services/org.eclipse.microprofile.config.spi.ConfigSource
@@ -1 +1 @@
-xyz.block.ftl.deployment.BannerConfigSource
+xyz.block.ftl.deployment.StaticConfigSource
diff --git a/jvm-runtime/ftl-runtime/common/runtime/pom.xml b/jvm-runtime/ftl-runtime/common/runtime/pom.xml
@@ -24,6 +24,14 @@
             <groupId>io.quarkus</groupId>
             <artifactId>quarkus-rest-jackson</artifactId>
         </dependency>
+        <dependency>
+            <groupId>io.quarkus</groupId>
+            <artifactId>quarkus-opentelemetry</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>io.opentelemetry.instrumentation</groupId>
+            <artifactId>opentelemetry-jdbc</artifactId>
+        </dependency>
         <dependency>
             <groupId>com.fasterxml.jackson.module</groupId>
             <artifactId>jackson-module-kotlin</artifactId>