JAR-RS Filter injection of a CDI Singleton that reference a @ConfigMapping object fails in Quarkus

I try to use latest Qarkus configuration tool : @ConfigMapping so I defined a GreetingConfig object:

@ConfigMapping(prefix = "org.acme.greeting")
public interface GreetingConfig {
    String prefix();
}

That config is injected in a CDI Singleton :

@Singleton
public class GreetingService {

    @Inject GreetingConfig config;

    public String greet(String user) {
        return config.prefix().concat(" - Hello ").concat(user).concat(" !!");
    }
}

The singleton is injected in a JAX-RS Filter and in a JAX-RS Resource

@Provider
public class GreetingFilter implements ContainerRequestFilter {

    private static final Logger LOGGER = Logger.getLogger(GreetingFilter.class.getName());

    @Inject GreetingService service;

    @Override
    public void filter(ContainerRequestContext requestContext) throws IOException {
        LOGGER.log(Level.INFO, service.greet("Quarkus"));
    }
}

@Path("/hello")
public class GreetingResource {

    @Inject GreetingService service;

    @GET
    @Produces(MediaType.TEXT_PLAIN)
    public String hello(@QueryParam("user") @DefaultValue("Quarkus") String user) {
        return service.greet(user);
    }
}

The application.properties file contains also :

org.acme.greeting.prefix=ACME Greetings

Application crash at startup :

java.lang.RuntimeException: java.lang.ExceptionInInitializerError

    at io.quarkus.test.junit.QuarkusTestExtension.throwBootFailureException(QuarkusTestExtension.java:712)
    at io.quarkus.test.junit.QuarkusTestExtension.interceptTestClassConstructor(QuarkusTestExtension.java:785)
    at org.junit.jupiter.engine.execution.ExecutableInvoker.lambda$invoke$0(ExecutableInvoker.java:105)
    at org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106)
    at org.junit.jupiter.api.extension.InvocationInterceptor.interceptTestClassConstructor(InvocationInterceptor.java:72)
    at org.junit.jupiter.engine.execution.ExecutableInvoker.lambda$invoke$0(ExecutableInvoker.java:105)
    at org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106)
    at org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:64)
    at org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:45)
    at org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:37)
    at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:104)
    at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:77)
    at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.invokeTestClassConstructor(ClassBasedTestDescriptor.java:342)
    at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.instantiateTestClass(ClassBasedTestDescriptor.java:289)
    at org.junit.jupiter.engine.descriptor.ClassTestDescriptor.instantiateTestClass(ClassTestDescriptor.java:79)
    at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.instantiateAndPostProcessTestInstance(ClassBasedTestDescriptor.java:267)
    at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$testInstancesProvider$2(ClassBasedTestDescriptor.java:259)
    at java.base/java.util.Optional.orElseGet(Optional.java:369)
    at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$testInstancesProvider$3(ClassBasedTestDescriptor.java:258)
    at org.junit.jupiter.engine.execution.TestInstancesProvider.getTestInstances(TestInstancesProvider.java:31)
    at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$prepare$0(TestMethodTestDescriptor.java:101)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.prepare(TestMethodTestDescriptor.java:100)
    at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.prepare(TestMethodTestDescriptor.java:65)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$prepare$1(NodeTestTask.java:111)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.prepare(NodeTestTask.java:111)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:79)
    at java.base/java.util.ArrayList.forEach(ArrayList.java:1541)
    at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:143)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:129)
    at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:127)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:126)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:84)
    at java.base/java.util.ArrayList.forEach(ArrayList.java:1541)
    at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:143)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:129)
    at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:127)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:126)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:84)
    at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:32)
    at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57)
    at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:51)
    at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:108)
    at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:88)
    at org.junit.platform.launcher.core.EngineExecutionOrchestrator.lambda$execute$0(EngineExecutionOrchestrator.java:54)
    at org.junit.platform.launcher.core.EngineExecutionOrchestrator.withInterceptedStreams(EngineExecutionOrchestrator.java:67)
    at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:52)
    at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:96)
    at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:75)
    at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:71)
    at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
    at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:235)
    at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:54)
Caused by: java.lang.ExceptionInInitializerError
    at java.base/java.lang.Class.forName0(Native Method)
    at java.base/java.lang.Class.forName(Class.java:398)
    at io.quarkus.runner.bootstrap.StartupActionImpl.run(StartupActionImpl.java:165)
    at io.quarkus.test.junit.QuarkusTestExtension.doJavaStart(QuarkusTestExtension.java:380)
    at io.quarkus.test.junit.QuarkusTestExtension.ensureStarted(QuarkusTestExtension.java:680)
    at io.quarkus.test.junit.QuarkusTestExtension.beforeAll(QuarkusTestExtension.java:727)
    at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$invokeBeforeAllCallbacks$8(ClassBasedTestDescriptor.java:368)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.invokeBeforeAllCallbacks(ClassBasedTestDescriptor.java:368)
    at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.before(ClassBasedTestDescriptor.java:192)
    at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.before(ClassBasedTestDescriptor.java:78)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:136)
    ... 31 more
Caused by: java.lang.RuntimeException: Failed to start quarkus
    at io.quarkus.runner.ApplicationImpl.<clinit>(ApplicationImpl.zig:225)
    ... 43 more
Caused by: java.lang.RuntimeException: Error injecting org.acme.GreetingService org.acme.api.filter.GreetingFilter.service
    at org.acme.api.filter.GreetingFilter_Bean.create(GreetingFilter_Bean.zig:148)
    at org.acme.api.filter.GreetingFilter_Bean.create(GreetingFilter_Bean.zig:171)
    at io.quarkus.arc.impl.AbstractSharedContext.createInstanceHandle(AbstractSharedContext.java:96)
    at io.quarkus.arc.impl.AbstractSharedContext$1.get(AbstractSharedContext.java:29)
    at io.quarkus.arc.impl.AbstractSharedContext$1.get(AbstractSharedContext.java:26)
    at io.quarkus.arc.impl.LazyValue.get(LazyValue.java:26)
    at io.quarkus.arc.impl.ComputingCache.computeIfAbsent(ComputingCache.java:69)
    at io.quarkus.arc.impl.AbstractSharedContext.get(AbstractSharedContext.java:26)
    at org.acme.api.filter.GreetingFilter_Bean.get(GreetingFilter_Bean.zig:203)
    at org.acme.api.filter.GreetingFilter_Bean.get(GreetingFilter_Bean.zig:219)
    at io.quarkus.arc.impl.ArcContainerImpl.beanInstanceHandle(ArcContainerImpl.java:433)
    at io.quarkus.arc.impl.ArcContainerImpl.beanInstanceHandle(ArcContainerImpl.java:446)
    at io.quarkus.arc.impl.ArcContainerImpl$1.get(ArcContainerImpl.java:269)
    at io.quarkus.arc.impl.ArcContainerImpl$1.get(ArcContainerImpl.java:266)
    at io.quarkus.resteasy.common.runtime.QuarkusConstructorInjector.construct(QuarkusConstructorInjector.java:39)
    at org.jboss.resteasy.core.providerfactory.ResteasyProviderFactoryImpl.injectedInstance(ResteasyProviderFactoryImpl.java:1399)
    at org.jboss.resteasy.core.interception.jaxrs.JaxrsInterceptorRegistryImpl$AbstractInterceptorFactory.createInterceptor(JaxrsInterceptorRegistryImpl.java:150)
    at org.jboss.resteasy.core.interception.jaxrs.JaxrsInterceptorRegistryImpl$OnDemandInterceptorFactory.initialize(JaxrsInterceptorRegistryImpl.java:168)
    at org.jboss.resteasy.core.interception.jaxrs.JaxrsInterceptorRegistryImpl$OnDemandInterceptorFactory.checkInitialize(JaxrsInterceptorRegistryImpl.java:183)
    at org.jboss.resteasy.core.interception.jaxrs.JaxrsInterceptorRegistryImpl$OnDemandInterceptorFactory.getInterceptor(JaxrsInterceptorRegistryImpl.java:193)
    at org.jboss.resteasy.core.interception.jaxrs.JaxrsInterceptorRegistryImpl$AbstractInterceptorFactory.postMatch(JaxrsInterceptorRegistryImpl.java:131)
    at org.jboss.resteasy.core.interception.jaxrs.JaxrsInterceptorRegistryImpl.postMatch(JaxrsInterceptorRegistryImpl.java:288)
    at org.jboss.resteasy.core.interception.jaxrs.ContainerRequestFilterRegistryImpl.postMatch(ContainerRequestFilterRegistryImpl.java:30)
    at org.jboss.resteasy.core.interception.jaxrs.ContainerRequestFilterRegistryImpl.postMatch(ContainerRequestFilterRegistryImpl.java:12)
    at org.jboss.resteasy.core.ResourceMethodInvoker.<init>(ResourceMethodInvoker.java:142)
    at org.jboss.resteasy.core.ResourceMethodRegistry.processMethod(ResourceMethodRegistry.java:381)
    at org.jboss.resteasy.core.ResourceMethodRegistry.register(ResourceMethodRegistry.java:308)
    at org.jboss.resteasy.core.ResourceMethodRegistry.addResourceFactory(ResourceMethodRegistry.java:259)
    at org.jboss.resteasy.core.ResourceMethodRegistry.addResourceFactory(ResourceMethodRegistry.java:227)
    at org.jboss.resteasy.core.ResourceMethodRegistry.addResourceFactory(ResourceMethodRegistry.java:208)
    at org.jboss.resteasy.core.ResourceMethodRegistry.addResourceFactory(ResourceMethodRegistry.java:192)
    at org.jboss.resteasy.core.ResourceMethodRegistry.addResourceFactory(ResourceMethodRegistry.java:175)
    at org.jboss.resteasy.core.ResourceMethodRegistry.addPerRequestResource(ResourceMethodRegistry.java:87)
    at org.jboss.resteasy.core.ResteasyDeploymentImpl.registerResources(ResteasyDeploymentImpl.java:518)
    at org.jboss.resteasy.core.ResteasyDeploymentImpl.registration(ResteasyDeploymentImpl.java:475)
    at org.jboss.resteasy.core.ResteasyDeploymentImpl.startInternal(ResteasyDeploymentImpl.java:164)
    at org.jboss.resteasy.core.ResteasyDeploymentImpl.start(ResteasyDeploymentImpl.java:121)
    at io.quarkus.resteasy.runtime.standalone.ResteasyStandaloneRecorder.staticInit(ResteasyStandaloneRecorder.java:37)
    at io.quarkus.deployment.steps.ResteasyStandaloneBuildStep$staticInit-210558872.deploy_0(ResteasyStandaloneBuildStep$staticInit-210558872.zig:897)
    at io.quarkus.deployment.steps.ResteasyStandaloneBuildStep$staticInit-210558872.deploy(ResteasyStandaloneBuildStep$staticInit-210558872.zig:40)
    at io.quarkus.runner.ApplicationImpl.<clinit>(ApplicationImpl.zig:205)
    ... 43 more
Caused by: java.lang.RuntimeException: Error injecting org.acme.config.GreetingConfig org.acme.GreetingService.config
    at org.acme.GreetingService_Bean.create(GreetingService_Bean.zig:199)
    at org.acme.GreetingService_Bean.create(GreetingService_Bean.zig:222)
    at io.quarkus.arc.impl.AbstractSharedContext.createInstanceHandle(AbstractSharedContext.java:96)
    at io.quarkus.arc.impl.AbstractSharedContext$1.get(AbstractSharedContext.java:29)
    at io.quarkus.arc.impl.AbstractSharedContext$1.get(AbstractSharedContext.java:26)
    at io.quarkus.arc.impl.LazyValue.get(LazyValue.java:26)
    at io.quarkus.arc.impl.ComputingCache.computeIfAbsent(ComputingCache.java:69)
    at io.quarkus.arc.impl.AbstractSharedContext.get(AbstractSharedContext.java:26)
    at org.acme.GreetingService_Bean.get(GreetingService_Bean.zig:254)
    at org.acme.GreetingService_Bean.get(GreetingService_Bean.zig:270)
    at org.acme.api.filter.GreetingFilter_Bean.create(GreetingFilter_Bean.zig:131)
    ... 83 more
Caused by: java.util.NoSuchElementException: SRCFG00027: Could not find a mapping for org.acme.config.GreetingConfig
    at io.smallrye.config.ConfigMappings.getConfigMapping(ConfigMappings.java:73)
    at io.smallrye.config.SmallRyeConfig.getConfigMapping(SmallRyeConfig.java:423)
    at io.quarkus.arc.runtime.ConfigMappingCreator.create(ConfigMappingCreator.java:28)
    at org.acme.config.GreetingConfig_04302c935a6cb43e5f29ca4271833ab99b620b3b_Synthetic_Bean.create(GreetingConfig_04302c935a6cb43e5f29ca4271833ab99b620b3b_Synthetic_Bean.zig:128)
    at org.acme.config.GreetingConfig_04302c935a6cb43e5f29ca4271833ab99b620b3b_Synthetic_Bean.get(GreetingConfig_04302c935a6cb43e5f29ca4271833ab99b620b3b_Synthetic_Bean.zig:159)
    at org.acme.config.GreetingConfig_04302c935a6cb43e5f29ca4271833ab99b620b3b_Synthetic_Bean.get(GreetingConfig_04302c935a6cb43e5f29ca4271833ab99b620b3b_Synthetic_Bean.zig:182)
    at io.quarkus.arc.impl.CurrentInjectionPointProvider.get(CurrentInjectionPointProvider.java:52)
    at org.acme.GreetingService_Bean.create(GreetingService_Bean.zig:182)
    ... 93 more

Injection in the JAR-RS resource works whatever bean type the service is (@ApplicationScope nor @Singleton) but in the Filter, only @ApplicationScope bean can be injected avoiding the runtime exception...

Is it a bug or is it normal that we cannot inject a pseudo scope bean with config mapping in a JAX-RS @Provider (Filter or BodyWritter) ?

Solution

Unfortunately, it's not a bug. It's a feature of jax-rs :-)

I checked your configuration class, and it works with CDI beans
I checked your exact code at it failed with the same exception.
I dug into the documentation and found no explanation for injecting CDI to providers.
Also, many providers I have found weren't using CDIs at all.
Finally, I have learned that it is possible to Inject instance to the provider even if the bean is not yet there.

A solution is to put your service into the Instance class.

@Inject Instance<GreetingService> service;

@Override
public void filter(ContainerRequestContext requestContext) throws IOException {
   LOGGER.log(Level.INFO, service.get().greet("Quarkus"));
}

It delegates injection to the later phase (a kind of lazy injection during runtime).

I have found more info here https://javaee.github.io/javaee-spec/javadocs/javax/enterprise/inject/Instance.html