Quarkus pub sub producers

docs/modules/ROOT/pages/pubsub.adoc

@@ -155,6 +155,28 @@ public class PubSubResource {
 }
 ----
 
+== AdminClient beans
+
+If you need to perform admin actions on PubSub, you can inject the `com.google.cloud.pubsub.v1.SubscriptionAdminClient` and
+`com.google.cloud.pubsub.v1.TopicAdminClient` as CDI beans as shown in the example below. This is usefull if the basic
+facilities offered by `io.quarkiverse.googlecloudservices.pubsub.QuarkusPubSub` are not sufficient:
+
+[source, java]
+----
+    @Inject
+    SubscriptionAdminClient subscriptionAdminClient;
+
+    @Inject
+    TopicAdminClient topicAdminClient;
+
+    public someMethod() {
+        var pushConfig = ...; // Create com.google.pubsub.v1.PushConfig
+        subscriptionAdminClient.createSubscription("subscription-name", "topic-name", pushConfig, 10 /* ACK deadline */);
+
+        var topics = topicAdminClient.listTopics("my-google-project");
+    }
+----
+
 == Dev Service
 
 === Configuring the Dev Service

pubsub/deployment/src/main/java/io/quarkiverse/googlecloudservices/pubsub/deployment/PubSubBuildSteps.java

@@ -1,5 +1,6 @@
 package io.quarkiverse.googlecloudservices.pubsub.deployment;
 
+import io.quarkiverse.googlecloudservices.pubsub.PubSubProducer;
 import io.quarkiverse.googlecloudservices.pubsub.QuarkusPubSub;
 import io.quarkus.arc.deployment.AdditionalBeanBuildItem;
 import io.quarkus.deployment.annotations.BuildStep;
@@ -15,6 +16,6 @@ public FeatureBuildItem feature() {
 
     @BuildStep
     public AdditionalBeanBuildItem producer() {
-        return new AdditionalBeanBuildItem(QuarkusPubSub.class);
+        return new AdditionalBeanBuildItem(QuarkusPubSub.class, PubSubProducer.class);
     }
 }

pubsub/runtime/src/main/java/io/quarkiverse/googlecloudservices/pubsub/PubSubProducer.java

@@ -0,0 +1,49 @@
+package io.quarkiverse.googlecloudservices.pubsub;
+
+import com.google.cloud.pubsub.v1.SubscriptionAdminClient;
+import com.google.cloud.pubsub.v1.TopicAdminClient;
+import jakarta.enterprise.inject.Disposes;
+import jakarta.enterprise.inject.Produces;
+import jakarta.inject.Inject;
+
+import java.io.IOException;
+
+/**
+ * Producer class for PubSub beans.
+ */
+public class PubSubProducer {
+
+    @Inject
+    QuarkusPubSub quarkusPubSub;
+
+    /**
+     * Makes the subscription admin client available as CDI bean
+     */
+    @Produces
+    public SubscriptionAdminClient subscriptionAdminClient() throws IOException {
+        return SubscriptionAdminClient.create(quarkusPubSub.subscriptionAdminSettings());
+    }
+
+    /**
+     * CDI Dispose method for {@link #subscriptionAdminClient()}. Shouldn't be called directly
+     */
+    public void shutdownSubscriptionAdminClient(@Disposes SubscriptionAdminClient subscriptionAdminClient) {
+        subscriptionAdminClient.close();
+    }
+
+    /**
+     * Makes the topic admin client available as a CDI bean
+     */
+    @Produces
+    public TopicAdminClient topicAdminClient() throws IOException {
+        return TopicAdminClient.create(quarkusPubSub.topicAdminSettings());
+    }
+
+    /**
+     * CDI Dispose method for {@link #topicAdminClient()}. Shouldn't be called directly
+     */
+    public void shutdownTopicAdminClient(@Disposes TopicAdminClient topicAdminClient) {
+        topicAdminClient.close();
+    }
+
+}