Fix a disabled OidcClient REST client issue

(cherry picked from commit 02a1660)

extensions/oidc-client/runtime/src/main/java/io/quarkus/oidc/client/runtime/OidcClientRecorder.java

@@ -244,17 +244,17 @@ private static class DisabledOidcClient implements OidcClient {
 
         @Override
         public Uni<Tokens> getTokens(Map<String, String> additionalGrantParameters) {
-            throw new DisabledOidcClientException(message);
+            return Uni.createFrom().failure(new DisabledOidcClientException(message));
         }
 
         @Override
         public Uni<Tokens> refreshTokens(String refreshToken, Map<String, String> additionalGrantParameters) {
-            throw new DisabledOidcClientException(message);
+            return Uni.createFrom().failure(new DisabledOidcClientException(message));
         }
 
         @Override
         public Uni<Boolean> revokeAccessToken(String accessToken, Map<String, String> additionalParameters) {
-            throw new DisabledOidcClientException(message);
+            return Uni.createFrom().failure(new DisabledOidcClientException(message));
         }
 
         @Override

integration-tests/oidc-client-reactive/src/main/java/io/quarkus/it/keycloak/FrontendResource.java

@@ -6,6 +6,7 @@
 import jakarta.ws.rs.GET;
 import jakarta.ws.rs.Path;
 import jakarta.ws.rs.Produces;
+import jakarta.ws.rs.WebApplicationException;
 
 import org.eclipse.microprofile.rest.client.inject.RestClient;
 
@@ -25,6 +26,10 @@ public class FrontendResource {
     @RestClient
     ProtectedResourceServiceNamedFilter protectedResourceServiceNamedFilter;
 
+    @Inject
+    @RestClient
+    ProtectedResourceServiceDisabledClient protectedResourceServiceDisabledClient;
+
     @Inject
     @RestClient
     MisconfiguredClientFilter misconfiguredClientFilter;
@@ -50,6 +55,14 @@ public Uni<String> userNameNamedFilter() {
         return protectedResourceServiceNamedFilter.getUserName();
     }
 
+    @GET
+    @Path("userNameDisabledClient")
+    @Produces("text/plain")
+    public Uni<String> userNameDisabledClient() {
+        return protectedResourceServiceDisabledClient.getUserName()
+                .onFailure(WebApplicationException.class).recoverWithItem(t -> t.getMessage());
+    }
+
     @GET
     @Path("userNameMisconfiguredClientFilter")
     @Produces("text/plain")

integration-tests/oidc-client-reactive/src/main/java/io/quarkus/it/keycloak/ProtectedResourceServiceDisabledClient.java

@@ -0,0 +1,21 @@
+package io.quarkus.it.keycloak;
+
+import jakarta.ws.rs.GET;
+import jakarta.ws.rs.Path;
+import jakarta.ws.rs.Produces;
+
+import org.eclipse.microprofile.rest.client.inject.RegisterRestClient;
+
+import io.quarkus.oidc.client.filter.OidcClientFilter;
+import io.smallrye.mutiny.Uni;
+
+@RegisterRestClient
+@OidcClientFilter("disabled-client")
+@Path("/")
+public interface ProtectedResourceServiceDisabledClient {
+
+    @GET
+    @Produces("text/plain")
+    @Path("userNameReactive")
+    Uni<String> getUserName();
+}

integration-tests/oidc-client-reactive/src/main/resources/application.properties

@@ -10,6 +10,14 @@ quarkus.oidc-client.grant.type=password
 quarkus.oidc-client.grant-options.password.username=alice
 quarkus.oidc-client.grant-options.password.password=alice
 
+quarkus.oidc-client.disabled-client.auth-server-url=${quarkus.oidc.auth-server-url}
+quarkus.oidc-client.disabled-client.client-id=${quarkus.oidc.client-id}
+quarkus.oidc-client.disabled-client.client-enabled=false
+quarkus.oidc-client.disabled-client.credentials.secret=${quarkus.oidc.credentials.secret}
+quarkus.oidc-client.disabled-client.grant.type=password
+quarkus.oidc-client.disabled-client.grant-options.password.username=alice
+quarkus.oidc-client.disabled-client.grant-options.password.password=alice
+
 quarkus.oidc-client.named-client.auth-server-url=${quarkus.oidc.auth-server-url}
 quarkus.oidc-client.named-client.client-id=${quarkus.oidc.client-id}
 quarkus.oidc-client.named-client.credentials.secret=${quarkus.oidc.credentials.secret}
@@ -27,6 +35,7 @@ quarkus.oidc-client.misconfigured-client.grant-options.password.password=bob
 io.quarkus.it.keycloak.ProtectedResourceServiceCustomFilter/mp-rest/url=http://localhost:8081/protected
 io.quarkus.it.keycloak.ProtectedResourceServiceReactiveFilter/mp-rest/url=http://localhost:8081/protected
 io.quarkus.it.keycloak.ProtectedResourceServiceNamedFilter/mp-rest/url=http://localhost:8081/protected
+io.quarkus.it.keycloak.ProtectedResourceServiceDisabledClient/mp-rest/url=http://localhost:8081/protected
 io.quarkus.it.keycloak.MisconfiguredClientFilter/mp-rest/url=http://localhost:8081/protected
 
 quarkus.log.category."io.quarkus.oidc.client.runtime.OidcClientImpl".min-level=TRACE

integration-tests/oidc-client-reactive/src/test/java/io/quarkus/it/keycloak/OidcClientTest.java

@@ -45,6 +45,15 @@ public void testGetUserNameNamedFilter() {
                 .body(equalTo("jdoe"));
     }
 
+    @Test
+    public void testGetUserNameDisabledClient() {
+        RestAssured.given().header("Accept", "text/plain")
+                .when().get("/frontend/userNameDisabledClient")
+                .then()
+                .statusCode(200)
+                .body(containsString("Unauthorized, status code 401"));
+    }
+
     @Test
     public void testGetUserNameMisconfiguredClientFilter() {
         RestAssured.given().header("Accept", "text/plain")