First Commit

src/main/java/quant/rich/emoney/config/ConstructionGuard.java

@@ -0,0 +1,36 @@
+package quant.rich.emoney.config;
+
+import java.util.HashSet;
+import java.util.Set;
+
+import org.springframework.beans.factory.BeanCreationException;
+
+import lombok.extern.slf4j.Slf4j;
+
+@Slf4j
+public class ConstructionGuard {
+    private static final ThreadLocal<Set<Class<?>>> constructing = ThreadLocal.withInitial(HashSet::new);
+
+    public static boolean isConstructing(Class<?> clazz) {
+        return constructing.get().contains(clazz);
+    }
+
+    public static void enter(Class<?> clazz) {
+        log.debug("Enter construction for {}", clazz.toString());
+        if (isConstructing(clazz)) {
+            StringBuilder sb = new StringBuilder();
+            sb.append("Class ")
+              .append(clazz.getName())
+              .append(" is being constructed but is seems like circular involving.");
+            String msg = sb.toString();
+            log.error(msg);
+            throw new BeanCreationException(msg);
+        }
+        constructing.get().add(clazz);
+    }
+
+    public static void exit(Class<?> clazz) {
+        constructing.get().remove(clazz);
+        log.debug("Exit construction for {}", clazz.toString());
+    }
+}