diff --git a/dubbo-rpc/dubbo-rpc-api/src/main/java/com/alibaba/dubbo/rpc/protocol/AbstractProtocol.java b/dubbo-rpc/dubbo-rpc-api/src/main/java/com/alibaba/dubbo/rpc/protocol/AbstractProtocol.java
index af05c501f4236724ca94c764f91dc69db7eceab9..29050a7f1d6bf7cde623c3a0b115a79226586541 100644
--- a/dubbo-rpc/dubbo-rpc-api/src/main/java/com/alibaba/dubbo/rpc/protocol/AbstractProtocol.java
+++ b/dubbo-rpc/dubbo-rpc-api/src/main/java/com/alibaba/dubbo/rpc/protocol/AbstractProtocol.java
@@ -1,18 +1,18 @@
-/*
- * Copyright 1999-2011 Alibaba Group.
- *  
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *  
- *      http://www.apache.org/licenses/LICENSE-2.0
- *  
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+/*
+ * Copyright 1999-2011 Alibaba Group.
+ *  
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *  
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *  
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.alibaba.dubbo.rpc.protocol;
 
 import java.util.ArrayList;
@@ -25,10 +25,11 @@ import com.alibaba.dubbo.common.URL;
 import com.alibaba.dubbo.common.logger.Logger;
 import com.alibaba.dubbo.common.logger.LoggerFactory;
 import com.alibaba.dubbo.common.utils.ConcurrentHashSet;
-import com.alibaba.dubbo.common.utils.ConfigUtils;
+import com.alibaba.dubbo.common.utils.ConfigUtils;
 import com.alibaba.dubbo.rpc.Exporter;
 import com.alibaba.dubbo.rpc.Invoker;
 import com.alibaba.dubbo.rpc.Protocol;
+import com.alibaba.dubbo.rpc.support.ProtocolUtils;
 
 /**
  * abstract ProtocolSupport.
@@ -41,29 +42,16 @@ public abstract class AbstractProtocol implements Protocol {
 	protected final Logger logger = LoggerFactory.getLogger(getClass());
 
 	protected final Map<String, Exporter<?>> exporterMap = new ConcurrentHashMap<String, Exporter<?>>();
-
+
 	//TODO SOFEREFENCE
     protected final Set<Invoker<?>> invokers = new ConcurrentHashSet<Invoker<?>>();
     
 	protected static String serviceKey(URL url) {
-	    return serviceKey(url.getPort(), url.getPath(), url.getParameter(Constants.VERSION_KEY),
-                         url.getParameter(Constants.GROUP_KEY));
+	    return ProtocolUtils.serviceKey(url);
 	}
 
 	protected static String serviceKey(int port, String serviceName, String serviceVersion, String serviceGroup) {
-		StringBuilder buf = new StringBuilder();
-		if (serviceGroup != null && serviceGroup.length() > 0) {
-			buf.append(serviceGroup);
-			buf.append("/");
-		}
-		buf.append(serviceName);
-		if (serviceVersion != null && serviceVersion.length() > 0 && ! "0.0.0".equals(serviceVersion)) {
-			buf.append(":");
-			buf.append(serviceVersion);
-		}
-		buf.append(":");
-		buf.append(port);
-		return buf.toString();
+		return ProtocolUtils.serviceKey(port, serviceName, serviceVersion, serviceGroup);
 	}
 	
 	public void destroy() {
diff --git a/dubbo-rpc/dubbo-rpc-api/src/main/java/com/alibaba/dubbo/rpc/support/ProtocolUtils.java b/dubbo-rpc/dubbo-rpc-api/src/main/java/com/alibaba/dubbo/rpc/support/ProtocolUtils.java
new file mode 100644
index 0000000000000000000000000000000000000000..11695391f26f3077ccc52adeae66e0db022af84b
--- /dev/null
+++ b/dubbo-rpc/dubbo-rpc-api/src/main/java/com/alibaba/dubbo/rpc/support/ProtocolUtils.java
@@ -0,0 +1,35 @@
+package com.alibaba.dubbo.rpc.support;
+
+import com.alibaba.dubbo.common.Constants;
+import com.alibaba.dubbo.common.URL;
+
+/**
+ * @author <a href="mailto:gang.lvg@alibaba-inc.com">kimi</a>
+ */
+public class ProtocolUtils {
+
+    private ProtocolUtils() {
+    }
+
+    public static String serviceKey(URL url) {
+        return serviceKey(url.getPort(), url.getPath(), url.getParameter(Constants.VERSION_KEY),
+                          url.getParameter(Constants.GROUP_KEY));
+    }
+
+    public static String serviceKey(int port, String serviceName, String serviceVersion, String serviceGroup) {
+        StringBuilder buf = new StringBuilder();
+        if (serviceGroup != null && serviceGroup.length() > 0) {
+            buf.append(serviceGroup);
+            buf.append("/");
+        }
+        buf.append(serviceName);
+        if (serviceVersion != null && serviceVersion.length() > 0 && !"0.0.0".equals(serviceVersion)) {
+            buf.append(":");
+            buf.append(serviceVersion);
+        }
+        buf.append(":");
+        buf.append(port);
+        return buf.toString();
+    }
+
+}