Make REST Client a bean when the scope property is set in config

Closes: #37007

extensions/resteasy-classic/rest-client-config/runtime/src/main/java/io/quarkus/restclient/config/RestClientBuildConfig.java

@@ -0,0 +1,22 @@
+package io.quarkus.restclient.config;
+
+import java.util.Optional;
+
+import io.quarkus.runtime.annotations.ConfigGroup;
+import io.quarkus.runtime.annotations.ConfigItem;
+import org.eclipse.microprofile.rest.client.inject.RegisterRestClient;
+
+@ConfigGroup
+public class RestClientBuildConfig {
+
+    /**
+     * The CDI scope to use for injection. This property can contain either a fully qualified class name of a CDI scope
+     * annotation (such as "jakarta.enterprise.context.ApplicationScoped") or its simple name (such as
+     * "ApplicationScoped").
+     * By default, this is not set which means the interface is not registered as a bean unless it is annotated with {@link RegisterRestClient}.
+     * If an interface is not annotated with {@link RegisterRestClient} and this property is set, then Quarkus will make the interface
+     * a bean of the configured scope.
+     */
+    @ConfigItem
+    public Optional<String> scope;
+}

extensions/resteasy-classic/rest-client-config/runtime/src/main/java/io/quarkus/restclient/config/RestClientConfig.java

@@ -21,7 +21,6 @@ public class RestClientConfig {
         EMPTY = new RestClientConfig();
         EMPTY.url = Optional.empty();
         EMPTY.uri = Optional.empty();
-        EMPTY.scope = Optional.empty();
         EMPTY.providers = Optional.empty();
         EMPTY.connectTimeout = Optional.empty();
         EMPTY.readTimeout = Optional.empty();
@@ -70,14 +69,6 @@ public class RestClientConfig {
     @ConfigItem
     public Optional<String> uri;
 
-    /**
-     * The CDI scope to use for injection. This property can contain either a fully qualified class name of a CDI scope
-     * annotation (such as "jakarta.enterprise.context.ApplicationScoped") or its simple name (such as
-     * "ApplicationScoped").
-     */
-    @ConfigItem
-    public Optional<String> scope;
-
     /**
      * Map where keys are fully-qualified provider classnames to include in the client, and values are their integer
      * priorities. The equivalent of the `@RegisterProvider` annotation.
@@ -280,7 +271,6 @@ public static RestClientConfig load(String configKey) {
 
         instance.url = getConfigValue(configKey, "url", String.class);
         instance.uri = getConfigValue(configKey, "uri", String.class);
-        instance.scope = getConfigValue(configKey, "scope", String.class);
         instance.providers = getConfigValue(configKey, "providers", String.class);
         instance.connectTimeout = getConfigValue(configKey, "connect-timeout", Long.class);
         instance.readTimeout = getConfigValue(configKey, "read-timeout", Long.class);
@@ -320,7 +310,6 @@ public static RestClientConfig load(Class<?> interfaceClass) {
 
         instance.url = getConfigValue(interfaceClass, "url", String.class);
         instance.uri = getConfigValue(interfaceClass, "uri", String.class);
-        instance.scope = getConfigValue(interfaceClass, "scope", String.class);
         instance.providers = getConfigValue(interfaceClass, "providers", String.class);
         instance.connectTimeout = getConfigValue(interfaceClass, "connect-timeout", Long.class);
         instance.readTimeout = getConfigValue(interfaceClass, "read-timeout", Long.class);

extensions/resteasy-classic/rest-client-config/runtime/src/main/java/io/quarkus/restclient/config/RestClientsBuildTimeConfig.java

@@ -0,0 +1,18 @@
+package io.quarkus.restclient.config;
+
+import java.util.Collections;
+import java.util.Map;
+
+import io.quarkus.runtime.annotations.ConfigItem;
+import io.quarkus.runtime.annotations.ConfigPhase;
+import io.quarkus.runtime.annotations.ConfigRoot;
+
+@ConfigRoot(name = "rest-client", phase = ConfigPhase.BUILD_TIME)
+public class RestClientsBuildTimeConfig {
+
+    /**
+     * Configurations of REST client instances.
+     */
+    @ConfigItem(name = ConfigItem.PARENT)
+    public Map<String, RestClientBuildConfig> configs = Collections.emptyMap();
+}

extensions/resteasy-classic/rest-client-config/runtime/src/main/java/io/quarkus/restclient/config/RestClientsConfig.java

@@ -2,6 +2,7 @@
 
 import java.util.Map;
 import java.util.Optional;
+import java.util.Set;
 import java.util.concurrent.ConcurrentHashMap;
 
 import jakarta.enterprise.inject.CreationException;
@@ -326,6 +327,10 @@ public void putClientConfig(Class<?> clientInterface, RestClientConfig clientCon
         configs.put(clientInterface.getName(), clientConfig);
     }
 
+    public Set<String> getConfigKeys() {
+        return configs.keySet();
+    }
+
     public static RestClientsConfig getInstance() {
         InstanceHandle<RestClientsConfig> configHandle;
         try {

extensions/resteasy-classic/rest-client-config/runtime/src/test/java/io/quarkus/restclient/config/RestClientConfigTest.java

@@ -33,8 +33,6 @@ private void verifyConfig(RestClientConfig config) {
         assertThat(config.url.get()).isEqualTo("http://localhost:8080");
         assertThat(config.uri).isPresent();
         assertThat(config.uri.get()).isEqualTo("http://localhost:8081");
-        assertThat(config.scope).isPresent();
-        assertThat(config.scope.get()).isEqualTo("Singleton");
         assertThat(config.providers).isPresent();
         assertThat(config.providers.get()).isEqualTo("io.quarkus.restclient.configuration.MyResponseFilter");
         assertThat(config.connectTimeout).isPresent();

extensions/resteasy-classic/rest-client/deployment/src/test/java/io/quarkus/restclient/configuration/QuarkusConfigurationTest.java

@@ -55,8 +55,6 @@ void configurationsShouldBeLoaded() {
     void verifyClientConfig(RestClientConfig clientConfig, boolean verifyNonStandardProperties) {
         assertThat(clientConfig.url).isPresent();
         assertThat(clientConfig.url.get()).contains("localhost");
-        assertThat(clientConfig.scope).isPresent();
-        assertThat(clientConfig.scope.get()).isEqualTo("Singleton");
         assertThat(clientConfig.providers).isPresent();
         assertThat(clientConfig.providers.get())
                 .isEqualTo("io.quarkus.restclient.configuration.MyResponseFilter");

extensions/resteasy-reactive/rest-client-reactive/deployment/src/main/java/io/quarkus/rest/client/reactive/deployment/RestClientReactiveProcessor.java

@@ -34,6 +34,7 @@
 import java.util.Map;
 import java.util.Optional;
 import java.util.Set;
+import java.util.stream.Collectors;
 
 import jakarta.enterprise.context.SessionScoped;
 import jakarta.enterprise.inject.Typed;
@@ -103,6 +104,7 @@
 import io.quarkus.rest.client.reactive.runtime.RestClientReactiveConfig;
 import io.quarkus.rest.client.reactive.runtime.RestClientRecorder;
 import io.quarkus.rest.client.reactive.spi.RestClientAnnotationsTransformerBuildItem;
+import io.quarkus.restclient.config.RestClientsBuildTimeConfig;
 import io.quarkus.restclient.config.RestClientsConfig;
 import io.quarkus.restclient.config.deployment.RestClientConfigUtils;
 import io.quarkus.resteasy.reactive.spi.ContainerRequestFilterBuildItem;
@@ -410,10 +412,13 @@ void addRestClientBeans(Capabilities capabilities,
             List<RestClientAnnotationsTransformerBuildItem> restClientAnnotationsTransformerBuildItem,
             BuildProducer<GeneratedBeanBuildItem> generatedBeans,
             RestClientReactiveConfig clientConfig,
+            RestClientsBuildTimeConfig clientsBuildConfig,
             RestClientRecorder recorder) {
 
         CompositeIndex index = CompositeIndex.create(combinedIndexBuildItem.getIndex());
-        Set<AnnotationInstance> registerRestClientAnnos = new HashSet<>(index.getAnnotations(REGISTER_REST_CLIENT));
+
+        Set<AnnotationInstance> registerRestClientAnnos = determineRegisterRestClientInstances(clientsBuildConfig, index);
+
         Map<String, String> configKeys = new HashMap<>();
         var annotationsStore = new AnnotationStore(restClientAnnotationsTransformerBuildItem.stream()
                 .map(RestClientAnnotationsTransformerBuildItem::getAnnotationsTransformer).collect(toList()));
@@ -574,6 +579,34 @@ && isImplementorOf(index, target.asClass(), RESPONSE_EXCEPTION_MAPPER, Set.of(AP
         }
     }
 
+    private Set<AnnotationInstance> determineRegisterRestClientInstances(RestClientsBuildTimeConfig clientsConfig,
+            CompositeIndex index) {
+        // these are the actual instances
+        Set<AnnotationInstance> registerRestClientAnnos = new HashSet<>(index.getAnnotations(REGISTER_REST_CLIENT));
+        // a set of the original target class
+        Set<ClassInfo> registerRestClientTargets = registerRestClientAnnos.stream().map(ai -> ai.target().asClass()).collect(
+                Collectors.toSet());
+
+        // now we go through the keys and if any of them correspond to classes that don't have a @RegisterRestClient annotation, we fake that annotation
+        Set<String> configKeyNames = clientsConfig.configs.keySet();
+        for (String configKeyName : configKeyNames) {
+            ClassInfo classInfo = index.getClassByName(configKeyName);
+            if (classInfo == null) {
+                continue;
+            }
+            if (registerRestClientTargets.contains(classInfo)) {
+                continue;
+            }
+            Optional<String> cdiScope = clientsConfig.configs.get(configKeyName).scope;
+            if (cdiScope.isEmpty()) {
+                continue;
+            }
+            registerRestClientAnnos.add(AnnotationInstance.builder(REGISTER_REST_CLIENT).add("configKey", configKeyName)
+                    .buildWithTarget(classInfo));
+        }
+        return registerRestClientAnnos;
+    }
+
     /**
      * Based on a list of interfaces implemented by @Provider class, determine if registration
      * should be skipped or not. Server-specific types should be omitted unless implementation

extensions/resteasy-reactive/rest-client-reactive/deployment/src/test/java/io/quarkus/rest/client/reactive/BeanFromConfigTest.java

@@ -0,0 +1,59 @@
+package io.quarkus.rest.client.reactive;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.util.Set;
+
+import jakarta.enterprise.context.Dependent;
+import jakarta.enterprise.inject.spi.Bean;
+import jakarta.enterprise.inject.spi.BeanManager;
+import jakarta.ws.rs.Consumes;
+import jakarta.ws.rs.POST;
+import jakarta.ws.rs.Path;
+import jakarta.ws.rs.Produces;
+import jakarta.ws.rs.core.MediaType;
+
+import org.eclipse.microprofile.rest.client.inject.RestClient;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.RegisterExtension;
+
+import io.quarkus.arc.Arc;
+import io.quarkus.test.QuarkusUnitTest;
+
+public class BeanFromConfigTest {
+
+    @RegisterExtension
+    static final QuarkusUnitTest TEST = new QuarkusUnitTest()
+            .withApplicationRoot((jar) -> jar
+                    .addClasses(HelloClient.class, HelloResource.class))
+            .overrideConfigKey("quarkus.rest-client.\"io.quarkus.rest.client.reactive.HelloClient\".scope", "Dependent")
+            .overrideRuntimeConfigKey("quarkus.rest-client.\"io.quarkus.rest.client.reactive.HelloClient\".url",
+                    "http://localhost:${quarkus.http.test-port:8081}");
+
+    @RestClient
+    HelloClient client;
+
+    @Test
+    void shouldHello() {
+        assertThat(client.echo("w0rld")).isEqualTo("hello, w0rld");
+    }
+
+    @Test
+    void shouldHaveDependentScope() {
+        BeanManager beanManager = Arc.container().beanManager();
+        Set<Bean<?>> beans = beanManager.getBeans(HelloClient.class, RestClient.LITERAL);
+        Bean<?> resolvedBean = beanManager.resolve(beans);
+        assertThat(resolvedBean.getScope()).isEqualTo(Dependent.class);
+    }
+
+    @Path("/hello")
+    @Produces(MediaType.TEXT_PLAIN)
+    @Consumes(MediaType.TEXT_PLAIN)
+    public static class HelloResource {
+
+        @POST
+        public String echo(String name) {
+            return "hello, " + name;
+        }
+    }
+}

extensions/resteasy-reactive/rest-client-reactive/deployment/src/test/java/io/quarkus/rest/client/reactive/ConfigurationTest.java

@@ -74,8 +74,6 @@ void emptyPathAnnotationShouldWork() {
     private void verifyClientConfig(RestClientConfig clientConfig, boolean checkExtraProperties) {
         assertThat(clientConfig.url).isPresent();
         assertThat(clientConfig.url.get()).endsWith("/hello");
-        assertThat(clientConfig.scope).isPresent();
-        assertThat(clientConfig.scope.get()).isEqualTo("Singleton");
         assertThat(clientConfig.providers).isPresent();
         assertThat(clientConfig.providers.get())
                 .isEqualTo("io.quarkus.rest.client.reactive.HelloClientWithBaseUri$MyResponseFilter");