DUBBO-625 业务对象的toString方法异常会导致RemotingInvocationTimeoutScan失效

dubbo-remoting/dubbo-remoting-api/src/main/java/com/alibaba/dubbo/remoting/exchange/Request.java

-/*
- * 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.remoting.exchange;
 
 import java.util.concurrent.atomic.AtomicLong;
 
+import com.alibaba.dubbo.common.utils.StringUtils;
+
 /**
  * Request.
  * 
  * @author qian.lei
  * @author william.liangf
  */
-public class Request {
-    
-    public static final String HEARTBEAT_EVENT = null;
-    
-    public static final String READONLY_EVENT = "R";
-    
+public class Request {
+    
+    public static final String HEARTBEAT_EVENT = null;
+    
+    public static final String READONLY_EVENT = "R";
+    
     private static final AtomicLong INVOKE_ID = new AtomicLong(0);
 
     private final long    mId;
 
     private String  mVersion;
 
-    private boolean mTwoWay   = true;
-    
+    private boolean mTwoWay   = true;
+    
     private boolean mEvent = false;
 
     private boolean mBroken   = false;
@@ -70,15 +72,15 @@ public class Request {
     public void setTwoWay(boolean twoWay) {
         mTwoWay = twoWay;
     }
-
-    public boolean isEvent() {
-        return mEvent;
-    }
-
-    public void setEvent(String event) {
-        mEvent = true;
-        mData = event;
-    }
+
+    public boolean isEvent() {
+        return mEvent;
+    }
+
+    public void setEvent(String event) {
+        mEvent = true;
+        mData = event;
+    }
 
     public boolean isBroken() {
         return mBroken;
@@ -95,16 +97,16 @@ public class Request {
     public void setData(Object msg) {
         mData = msg;
     }
-
-    public boolean isHeartbeat() {
-        return mEvent && HEARTBEAT_EVENT == mData;
-    }
-
-    public void setHeartbeat(boolean isHeartbeat) {
-        if (isHeartbeat) {
-            setEvent(HEARTBEAT_EVENT);
-        }
-    }
+
+    public boolean isHeartbeat() {
+        return mEvent && HEARTBEAT_EVENT == mData;
+    }
+
+    public void setHeartbeat(boolean isHeartbeat) {
+        if (isHeartbeat) {
+            setEvent(HEARTBEAT_EVENT);
+        }
+    }
 
     private static long newId() {
         // getAndIncrement()增长到MAX_VALUE时，再增长会变为MIN_VALUE，负数也可以做为ID
@@ -114,7 +116,18 @@ public class Request {
     @Override
     public String toString() {
         return "Request [id=" + mId + ", version=" + mVersion + ", twoway=" + mTwoWay + ", event=" + mEvent
-               + ", broken=" + mBroken + ", data=" + (mData == this ? "this" : mData) + "]";
+               + ", broken=" + mBroken + ", data=" + (mData == this ? "this" : safeToString(mData)) + "]";
     }
 
-}
\ No newline at end of file
+    private static String safeToString(Object data) {
+        if (data == null) return null;
+        String dataStr;
+        try {
+            dataStr = data.toString();
+        } catch (Throwable e) {
+            dataStr = "<Fail toString of " + data.getClass() + ", cause: " +
+                    StringUtils.toString(e) + ">";
+        }
+        return dataStr;
+    }
+}