Make LaunchMode injectable

Fixes quarkusio#589

core/runtime/src/main/java/io/quarkus/runtime/LaunchMode.java

@@ -1,5 +1,7 @@
 package io.quarkus.runtime;
 
+import io.quarkus.runtime.configuration.ProfileManager;
+
 public enum LaunchMode {
 
     /**
@@ -29,4 +31,12 @@ public boolean isDevOrTest() {
     public String getDefaultProfile() {
         return defaultProfile;
     }
+
+    /**
+     *
+     * @return The current launch mode
+     */
+    public static LaunchMode current() {
+        return ProfileManager.getLaunchMode();
+    }
 }

core/runtime/src/main/java/io/quarkus/runtime/configuration/ProfileManager.java

@@ -29,6 +29,10 @@ public static void setLaunchMode(LaunchMode mode) {
         launchMode = mode;
     }
 
+    public static LaunchMode getLaunchMode() {
+        return launchMode;
+    }
+
     public static void setRuntimeDefaultProfile(final String profile) {
         runtimeDefaultProfile = profile;
     }

docs/src/main/asciidoc/lifecycle.adoc

@@ -110,3 +110,11 @@ When the application is stopped, the second log message is printed.
 
 As usual, the application can be packaged using `./mvnw clean package` and executed using the `-runner.jar` file.
 You can also generate the native executable using `./mvnw clean package -Pnative`.
+
+== Launch Modes
+
+Quarkus has 3 different launch modes, `NORMAL` (i.e. production), `DEVELOPMENT` and `TEST`. If you are running `quarkus:dev`
+then the mode will be `DEVELOPMENT`, if you are running a JUnit test it will be `TEST`, otherwise it will be `NORMAL`.
+
+Your application can get the launch mode by injecting the `io.quarkus.runtime.LaunchMode` enum into a CDI bean,
+or by invoking the static method `io.quarkus.runtime.LaunchMode.current()`.

extensions/arc/deployment/src/main/java/io/quarkus/arc/deployment/ArcProcessor.java

@@ -40,6 +40,7 @@
 import io.quarkus.arc.runtime.AdditionalBean;
 import io.quarkus.arc.runtime.ArcRecorder;
 import io.quarkus.arc.runtime.BeanContainer;
+import io.quarkus.arc.runtime.LaunchModeProducer;
 import io.quarkus.arc.runtime.LifecycleEventRunner;
 import io.quarkus.deployment.Capabilities;
 import io.quarkus.deployment.annotations.BuildProducer;
@@ -328,6 +329,11 @@ void setupExecutor(ExecutorBuildItem executor, ArcRecorder recorder) {
         recorder.initExecutor(executor.getExecutorProxy());
     }
 
+    @BuildStep
+    AdditionalBeanBuildItem launchMode() {
+        return new AdditionalBeanBuildItem(LaunchModeProducer.class);
+    }
+
     private abstract static class AbstractCompositeApplicationClassesPredicate<T> implements Predicate<T> {
 
         private final IndexView applicationClassesIndex;

extensions/arc/deployment/src/test/java/io/quarkus/arc/test/SimpleBeanTest.java

@@ -12,6 +12,7 @@
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.RegisterExtension;
 
+import io.quarkus.runtime.LaunchMode;
 import io.quarkus.test.QuarkusUnitTest;
 
 public class SimpleBeanTest {
@@ -25,6 +26,9 @@ public class SimpleBeanTest {
     @Inject
     SimpleBean simpleBean;
 
+    @Inject
+    LaunchMode launchMode;
+
     @Test
     public void testSimpleBean() {
         assertNotNull(simpleBean.getStartupEvent());
@@ -34,4 +38,9 @@ public void testSimpleBean() {
         assertEquals("1", simpleBean.getBazProvider().get());
     }
 
+    @Test
+    public void testLaunchModeInjection() {
+        assertEquals(LaunchMode.TEST, launchMode);
+    }
+
 }

extensions/arc/runtime/src/main/java/io/quarkus/arc/runtime/LaunchModeProducer.java

@@ -0,0 +1,15 @@
+package io.quarkus.arc.runtime;
+
+import javax.enterprise.context.Dependent;
+import javax.enterprise.inject.Produces;
+
+import io.quarkus.runtime.LaunchMode;
+
+@Dependent
+public class LaunchModeProducer {
+
+    @Produces
+    LaunchMode mode() {
+        return LaunchMode.current();
+    }
+}