event of response fix#3244 (#3247)

Author: CrazyHZM

dubbo-remoting/dubbo-remoting-api/src/main/java/org/apache/dubbo/remoting/exchange/Response.java

@@ -137,6 +137,10 @@ public void setEvent(String event) {
         mResult = event;
     }
 
+    public void setEvent(boolean mEvent) {
+        this.mEvent = mEvent;
+    }
+
     public boolean isHeartbeat() {
         return mEvent && HEARTBEAT_EVENT == mResult;
     }

dubbo-remoting/dubbo-remoting-api/src/main/java/org/apache/dubbo/remoting/exchange/codec/ExchangeCodec.java

@@ -142,7 +142,7 @@ protected Object decodeBody(Channel channel, InputStream is, byte[] header) thro
             // decode response.
             Response res = new Response(id);
             if ((flag & FLAG_EVENT) != 0) {
-                res.setEvent(Response.HEARTBEAT_EVENT);
+                res.setEvent(true);
             }
             // get status.
             byte status = header[3];

dubbo-remoting/dubbo-remoting-api/src/test/java/org/apache/dubbo/remoting/transport/codec/DeprecatedExchangeCodec.java

@@ -136,7 +136,7 @@ protected Object decodeBody(Channel channel, InputStream is, byte[] header) thro
             // decode response.
             Response res = new Response(id);
             if ((flag & FLAG_EVENT) != 0) {
-                res.setEvent(Response.HEARTBEAT_EVENT);
+                res.setEvent(true);
             }
             // get status.
             byte status = header[3];

dubbo-rpc/dubbo-rpc-dubbo/src/main/java/org/apache/dubbo/rpc/protocol/dubbo/DubboCodec.java

@@ -68,7 +68,7 @@ protected Object decodeBody(Channel channel, InputStream is, byte[] header) thro
             // decode response.
             Response res = new Response(id);
             if ((flag & FLAG_EVENT) != 0) {
-                res.setEvent(Response.HEARTBEAT_EVENT);
+                res.setEvent(true);
             }
             // get status.
             byte status = header[3];