Deferred initialization - Quarkus impl

quarkus/extensions/pom.xml

@@ -36,6 +36,29 @@
             <groupId>org.keycloak</groupId>
             <artifactId>keycloak-services</artifactId>
         </dependency>
+        <dependency>
+            <groupId>io.quarkus</groupId>
+            <artifactId>quarkus-arc</artifactId>
+            <type>jar</type>
+        </dependency>
     </dependencies>
 
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.jboss.jandex</groupId>
+                <artifactId>jandex-maven-plugin</artifactId>
+                <version>1.0.6</version>
+                <executions>
+                    <execution>
+                        <id>make-index</id>
+                        <goals>
+                            <goal>jandex</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+
 </project>

quarkus/extensions/src/main/java/org/keycloak/provider/quarkus/QuarkusStartup.java

@@ -0,0 +1,31 @@
+/*
+ * Copyright 2019 Red Hat, Inc. and/or its affiliates
+ * and other contributors as indicated by the @author tags.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.keycloak.provider.quarkus;
+
+import io.quarkus.arc.Arc;
+import org.keycloak.services.resources.KeycloakApplication;
+
+public class QuarkusStartup implements KeycloakApplication.Startup {
+
+    @Override
+    public void execute(Runnable command) {
+        QuarkusStartupObserver observer = Arc.container().instance(QuarkusStartupObserver.class).get();
+        observer.setCommand(command);
+    }
+
+}

quarkus/extensions/src/main/java/org/keycloak/provider/quarkus/QuarkusStartupObserver.java

@@ -0,0 +1,39 @@
+/*
+ * Copyright 2019 Red Hat, Inc. and/or its affiliates
+ * and other contributors as indicated by the @author tags.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.keycloak.provider.quarkus;
+
+import io.quarkus.runtime.StartupEvent;
+import javax.enterprise.context.ApplicationScoped;
+import javax.enterprise.event.Observes;
+
+@ApplicationScoped
+public class QuarkusStartupObserver {
+
+    private Runnable command;
+
+    public void setCommand(Runnable command) {
+        this.command = command;
+    }
+
+    private void startupEvent(@Observes StartupEvent event) {
+        if (command != null) {
+            command.run();
+        }
+    }
+
+}

quarkus/extensions/src/main/resources/META-INF/services/org.keycloak.services.resources.KeycloakApplication$Startup

@@ -0,0 +1,18 @@
+#
+# Copyright 2019 Red Hat, Inc. and/or its affiliates
+# and other contributors as indicated by the @author tags.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+org.keycloak.provider.quarkus.QuarkusStartup