diff --git a/src/main/java/com/serliunx/statemanagement/machine/AbstractStateMachine.java b/src/main/java/com/serliunx/statemanagement/machine/AbstractStateMachine.java
index 81bc86c..64bc2be 100644
--- a/src/main/java/com/serliunx/statemanagement/machine/AbstractStateMachine.java
+++ b/src/main/java/com/serliunx/statemanagement/machine/AbstractStateMachine.java
@@ -185,6 +185,14 @@ public abstract class AbstractStateMachine<S> extends AbstractStateManager<S> im
         }
     }
 
+    @Override
+    public void publish(Object event) {
+        List<Consumer<StateMachine<S>>> consumers = context.eventRegistries.get(event);
+        if (consumers != null) {
+            consumers.forEach(consumer -> consumer.accept(this));
+        }
+    }
+
     @Override
     public S switchPrevAndGet() {
         return switchPrevAndGet(true);
diff --git a/src/main/java/com/serliunx/statemanagement/machine/DefaultConcurrentStateMachine.java b/src/main/java/com/serliunx/statemanagement/machine/DefaultConcurrentStateMachine.java
index 1e20b10..b001399 100644
--- a/src/main/java/com/serliunx/statemanagement/machine/DefaultConcurrentStateMachine.java
+++ b/src/main/java/com/serliunx/statemanagement/machine/DefaultConcurrentStateMachine.java
@@ -143,8 +143,8 @@ public class DefaultConcurrentStateMachine<S> extends AbstractStateMachine<S> im
     }
 
     @Override
-    public void publish(Object event) {
-
+    public S current() {
+        return get(index.get());
     }
 
     /**
diff --git a/src/main/java/com/serliunx/statemanagement/machine/StandardStateMachine.java b/src/main/java/com/serliunx/statemanagement/machine/StandardStateMachine.java
index 213d9e1..143a201 100644
--- a/src/main/java/com/serliunx/statemanagement/machine/StandardStateMachine.java
+++ b/src/main/java/com/serliunx/statemanagement/machine/StandardStateMachine.java
@@ -35,12 +35,4 @@ public class StandardStateMachine<S> extends AbstractStateMachine<S> implements
 	) {
 		super(stateList, entryHandlers, leaveHandlers, exchangeHandlers, eventRegistries, executor, async);
 	}
-
-	@Override
-	public void publish(Object event) {
-		List<Consumer<StateMachine<S>>> consumers = context.eventRegistries.get(event);
-		if (consumers != null) {
-			consumers.forEach(consumer -> consumer.accept(this));
-		}
-	}
 }