WFCORE-6347 Add convenience method for generating a composite ResourceServiceConfigurator.

subsystem/src/main/java/org/wildfly/subsystem/service/ResourceServiceConfigurator.java

@@ -4,6 +4,10 @@
  */
 package org.wildfly.subsystem.service;
 
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+
 import org.jboss.as.controller.OperationContext;
 import org.jboss.as.controller.OperationFailedException;
 import org.jboss.dmr.ModelNode;
@@ -22,4 +26,31 @@ public interface ResourceServiceConfigurator {
      * @throws OperationFailedException if there was a failure reading the model or resolving expressions/capabilities
      */
     ResourceServiceInstaller configure(OperationContext context, ModelNode model) throws OperationFailedException;
+
+    /**
+     * Returns a composite {@link ResourceServiceConfigurator} that configures the specified service configurators.
+     * @param configurators a variable number of configurators
+     * @return a composite service configurator
+     */
+    static ResourceServiceConfigurator combine(ResourceServiceConfigurator... configurators) {
+        return combine(List.of(configurators));
+    }
+
+    /**
+     * Returns a composite {@link ResourceServiceConfigurator} that configures the specified service configurators.
+     * @param configurators a collection of configurators
+     * @return a composite configurator
+     */
+    static ResourceServiceConfigurator combine(Collection<? extends ResourceServiceConfigurator> configurators) {
+        return new ResourceServiceConfigurator() {
+            @Override
+            public ResourceServiceInstaller configure(OperationContext context, ModelNode model) throws OperationFailedException {
+                List<ResourceServiceInstaller> installers = new ArrayList<>(configurators.size());
+                for (ResourceServiceConfigurator configurator : configurators) {
+                    installers.add(configurator.configure(context, model));
+                }
+                return ResourceServiceInstaller.combine(installers);
+            }
+        };
+    }
 }

subsystem/src/main/java/org/wildfly/subsystem/service/ResourceServiceInstaller.java

@@ -17,6 +17,13 @@
  */
 public interface ResourceServiceInstaller {
 
+    /**
+     * Installs a service into the target associated with the specified operation context.
+     * @param context an operation context
+     * @return a mechanism to remove the installed service
+     */
+    Consumer<OperationContext> install(OperationContext context);
+
     /**
      * Returns a composite {@link ResourceServiceInstaller} that installs the specified installers.
      * @param installers a variable number of installers
@@ -50,11 +57,4 @@ public void accept(OperationContext context) {
             }
         };
     }
-
-    /**
-     * Installs a service into the target associated with the specified operation context.
-     * @param context an operation context
-     * @return a mechanism to remove the installed service
-     */
-    Consumer<OperationContext> install(OperationContext context);
 }