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From GitBox <...@apache.org>
Subject [GitHub] diecui1202 closed pull request #2480: Support for caching null values
Date Fri, 21 Sep 2018 02:35:55 GMT
diecui1202 closed pull request #2480:  Support for caching null values
URL: https://github.com/apache/incubator-dubbo/pull/2480
 
 
   

This is a PR merged from a forked repository.
As GitHub hides the original diff on merge, it is displayed below for
the sake of provenance:

As this is a foreign pull request (from a fork), the diff is supplied
below (as it won't show otherwise due to GitHub magic):

diff --git a/dubbo-filter/dubbo-filter-cache/src/main/java/org/apache/dubbo/cache/filter/CacheFilter.java
b/dubbo-filter/dubbo-filter-cache/src/main/java/org/apache/dubbo/cache/filter/CacheFilter.java
index f7e362ba58..62a739d186 100644
--- a/dubbo-filter/dubbo-filter-cache/src/main/java/org/apache/dubbo/cache/filter/CacheFilter.java
+++ b/dubbo-filter/dubbo-filter-cache/src/main/java/org/apache/dubbo/cache/filter/CacheFilter.java
@@ -16,6 +16,8 @@
  */
 package org.apache.dubbo.cache.filter;
 
+import java.io.Serializable;
+
 import org.apache.dubbo.cache.Cache;
 import org.apache.dubbo.cache.CacheFactory;
 import org.apache.dubbo.common.Constants;
@@ -49,16 +51,34 @@ public Result invoke(Invoker<?> invoker, Invocation invocation)
throws RpcExcept
                 String key = StringUtils.toArgumentString(invocation.getArguments());
                 Object value = cache.get(key);
                 if (value != null) {
-                    return new RpcResult(value);
+                    if (value instanceof ValueWrapper) {
+                        return new RpcResult(((ValueWrapper)value).get());
+                    } else {
+                        return new RpcResult(value);
+                    }
                 }
                 Result result = invoker.invoke(invocation);
-                if (!result.hasException() && result.getValue() != null) {
-                    cache.put(key, result.getValue());
+                if (!result.hasException()) {
+                    cache.put(key, new ValueWrapper(result.getValue()));
                 }
                 return result;
             }
         }
         return invoker.invoke(invocation);
     }
+    
+    static class ValueWrapper implements Serializable{
+
+        private static final long serialVersionUID = -1777337318019193256L;
 
+        private final Object value;
+
+        public ValueWrapper(Object value){
+            this.value = value;
+        }
+
+        public Object get() {
+            return this.value;
+        }
+    }
 }
diff --git a/dubbo-filter/dubbo-filter-cache/src/test/java/org/apache/dubbo/cache/filter/CacheFilterTest.java
b/dubbo-filter/dubbo-filter-cache/src/test/java/org/apache/dubbo/cache/filter/CacheFilterTest.java
index c51bce79b9..7d571dd644 100644
--- a/dubbo-filter/dubbo-filter-cache/src/test/java/org/apache/dubbo/cache/filter/CacheFilterTest.java
+++ b/dubbo-filter/dubbo-filter-cache/src/test/java/org/apache/dubbo/cache/filter/CacheFilterTest.java
@@ -134,7 +134,7 @@ public void testNull() {
         cacheFilter.invoke(invoker4, invocation);
         RpcResult rpcResult1 = (RpcResult) cacheFilter.invoke(invoker1, invocation);
         RpcResult rpcResult2 = (RpcResult) cacheFilter.invoke(invoker2, invocation);
-        Assert.assertEquals(rpcResult1.getValue(), "value1");
-        Assert.assertEquals(rpcResult2.getValue(), "value1");
+        Assert.assertEquals(rpcResult1.getValue(), null);
+        Assert.assertEquals(rpcResult2.getValue(), null);
     }
 }


 

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