repos init.

src/main/java/com/serliunx/ddns/util/InstanceUtils.java

@@ -0,0 +1,22 @@
+package com.serliunx.ddns.util;
+
+import com.serliunx.ddns.core.instance.Instance;
+import com.serliunx.ddns.support.Assert;
+
+/**
+ * 实例相关工具方法集合
+ * @author SerLiunx
+ * @since 1.0
+ */
+public final class InstanceUtils {
+
+    private InstanceUtils(){throw new UnsupportedOperationException();}
+
+    public static void validateInstance(Instance instance){
+        Assert.notNull(instance);
+        String instanceName = instance.getName();
+        if(instanceName == null || instanceName.isEmpty()){
+            throw new NullPointerException();
+        }
+    }
+}