diff --git a/scheduler/src/main/java/com/zfoo/scheduler/util/SingleCache.java b/net/src/main/java/com/zfoo/net/util/SingleCache.java
similarity index 90%
rename from scheduler/src/main/java/com/zfoo/scheduler/util/SingleCache.java
rename to net/src/main/java/com/zfoo/net/util/SingleCache.java
index e4a738a4..4965c0b6 100644
--- a/scheduler/src/main/java/com/zfoo/scheduler/util/SingleCache.java
+++ b/net/src/main/java/com/zfoo/net/util/SingleCache.java
@@ -11,10 +11,13 @@
  * See the License for the specific language governing permissions and limitations under the License.
  */
 
-package com.zfoo.scheduler.util;
+package com.zfoo.net.util;
 
 import com.zfoo.event.manager.EventBus;
+import com.zfoo.scheduler.manager.SchedulerBus;
+import com.zfoo.scheduler.util.TimeUtils;
 
+import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicLong;
 import java.util.function.Supplier;
 
@@ -90,4 +93,8 @@ public class SingleCache<V> {
         EventBus.asyncExecute(this.hashCode(), () -> cache = supplier.get());
     }
 
+    public void lazyRefreshDelay(long delay, TimeUnit unit) {
+        SchedulerBus.schedule(this::lazyRefresh, delay, unit);
+    }
+
 }
diff --git a/scheduler/pom.xml b/scheduler/pom.xml
index 6423b38b..3100b1b5 100644
--- a/scheduler/pom.xml
+++ b/scheduler/pom.xml
@@ -57,12 +57,6 @@
             <version>${zfoo.version}</version>
         </dependency>
 
-        <dependency>
-            <groupId>com.zfoo</groupId>
-            <artifactId>event</artifactId>
-            <version>${zfoo.version}</version>
-        </dependency>
-
         <dependency>
             <groupId>org.javassist</groupId>
             <artifactId>javassist</artifactId>