[System-X] Add methods for configuring service instance

system-x/common/src/main/java/software/tnb/common/service/ConfigurableService.java

@@ -0,0 +1,32 @@
+package software.tnb.common.service;
+
+import software.tnb.common.service.configuration.ServiceConfiguration;
+
+import org.junit.platform.commons.util.ReflectionUtils;
+
+import java.lang.reflect.ParameterizedType;
+import java.lang.reflect.Type;
+
+public abstract class ConfigurableService<C extends ServiceConfiguration> implements Service {
+    private final C configuration;
+
+    public ConfigurableService() {
+        Type type = this.getClass().getGenericSuperclass();
+        while (true) {
+            if (type instanceof ParameterizedType) {
+                if (((ParameterizedType) type).getRawType().equals(ConfigurableService.class)) {
+                    break;
+                } else {
+                    throw new RuntimeException("Expected to find " + ConfigurableService.class.getSimpleName() + ", but found "
+                        + ((ParameterizedType) type).getRawType().getTypeName());
+                }
+            }
+            type = ((Class) type).getGenericSuperclass();
+        }
+        configuration = ReflectionUtils.newInstance((Class<C>) ((ParameterizedType) type).getActualTypeArguments()[0]);
+    }
+
+    public C getConfiguration() {
+        return configuration;
+    }
+}

system-x/common/src/main/java/software/tnb/common/service/ServiceFactory.java

@@ -3,6 +3,7 @@
 import software.tnb.common.config.OpenshiftConfiguration;
 import software.tnb.common.deployment.Deployable;
 import software.tnb.common.deployment.OpenshiftDeployable;
+import software.tnb.common.service.configuration.ServiceConfiguration;
 
 import org.junit.platform.commons.function.Try;
 import org.junit.platform.commons.util.ReflectionUtils;
@@ -65,6 +66,12 @@ public static <S extends Service> S create(Class<S> clazz) {
         }
     }
 
+    public static <C extends ServiceConfiguration, S extends ConfigurableService<C>> S create(Class<S> clazz, Consumer<C> config) {
+        S service = create(clazz);
+        config.accept(service.getConfiguration());
+        return service;
+    }
+
     public static <S extends Service> void withService(Class<S> clazz, Consumer<S> code) {
         S service = create(clazz);
         try {

system-x/common/src/main/java/software/tnb/common/service/configuration/ServiceConfiguration.java

@@ -0,0 +1,17 @@
+package software.tnb.common.service.configuration;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class ServiceConfiguration {
+    private final Map<String, Object> configuration = new HashMap<>();
+
+    protected void set(String key, Object value) {
+        configuration.put(key, value);
+    }
+
+    protected <T> T get(String key, Class<T> clazz) {
+        final Object value = configuration.get(key);
+        return value == null ? null : clazz.cast(value);
+    }
+}