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in repository https://gitbox.apache.org/repos/asf/dubbo.git


The following commit(s) were added to refs/heads/master by this push:
     new f8f6995  Use MapUtils instead of AttachmentsAdapter (#8772)
f8f6995 is described below

commit f8f6995b565250557eed548995ae1a6f12b8c1d5
Author: yizhenqiang <[email protected]>
AuthorDate: Tue Sep 14 12:40:39 2021 +0800

    Use MapUtils instead of AttachmentsAdapter (#8772)
    
    * Use MapUtils instead of AttachmentsAdapter
---
 .../rpc/cluster/directory/MockDirInvocation.java   | 12 ++--
 .../org/apache/dubbo/common/utils/MapUtils.java    | 65 ++++++++++++++++++++++
 .../org/apache/dubbo/service/MockInvocation.java   |  4 +-
 .../java/org/apache/dubbo/rpc/AppResponse.java     |  3 +-
 .../org/apache/dubbo/rpc/AttachmentsAdapter.java   | 13 ++++-
 .../main/java/org/apache/dubbo/rpc/RpcContext.java |  7 ++-
 .../java/org/apache/dubbo/rpc/RpcInvocation.java   |  3 +-
 .../apache/dubbo/rpc/support/MockInvocation.java   |  4 +-
 8 files changed, 93 insertions(+), 18 deletions(-)

diff --git 
a/dubbo-cluster/src/test/java/org/apache/dubbo/rpc/cluster/directory/MockDirInvocation.java
 
b/dubbo-cluster/src/test/java/org/apache/dubbo/rpc/cluster/directory/MockDirInvocation.java
index bc237b9..de4235e 100644
--- 
a/dubbo-cluster/src/test/java/org/apache/dubbo/rpc/cluster/directory/MockDirInvocation.java
+++ 
b/dubbo-cluster/src/test/java/org/apache/dubbo/rpc/cluster/directory/MockDirInvocation.java
@@ -16,19 +16,17 @@
  */
 package org.apache.dubbo.rpc.cluster.directory;
 
-import org.apache.dubbo.rpc.AttachmentsAdapter;
-import org.apache.dubbo.rpc.Invocation;
-import org.apache.dubbo.rpc.Invoker;
-
 import java.util.HashMap;
 import java.util.Map;
-
 import static 
org.apache.dubbo.common.constants.CommonConstants.DUBBO_VERSION_KEY;
 import static org.apache.dubbo.common.constants.CommonConstants.GROUP_KEY;
 import static org.apache.dubbo.common.constants.CommonConstants.PATH_KEY;
 import static org.apache.dubbo.common.constants.CommonConstants.TIMEOUT_KEY;
 import static org.apache.dubbo.common.constants.CommonConstants.VERSION_KEY;
+import org.apache.dubbo.common.utils.MapUtils;
 import static org.apache.dubbo.rpc.Constants.TOKEN_KEY;
+import org.apache.dubbo.rpc.Invocation;
+import org.apache.dubbo.rpc.Invoker;
 
 /**
  * MockInvocation.java
@@ -75,7 +73,7 @@ public class MockDirInvocation implements Invocation {
     }
 
     public Map<String, String> getAttachments() {
-        return new AttachmentsAdapter.ObjectToStringMap(attachments);
+        return MapUtils.objectToStringMap(attachments);
     }
 
     @Override
@@ -90,7 +88,7 @@ public class MockDirInvocation implements Invocation {
 
     @Override
     public void setAttachment(String key, Object value) {
-       setObjectAttachment(key, value);
+        setObjectAttachment(key, value);
     }
 
     @Override
diff --git 
a/dubbo-common/src/main/java/org/apache/dubbo/common/utils/MapUtils.java 
b/dubbo-common/src/main/java/org/apache/dubbo/common/utils/MapUtils.java
new file mode 100644
index 0000000..00454a5
--- /dev/null
+++ b/dubbo-common/src/main/java/org/apache/dubbo/common/utils/MapUtils.java
@@ -0,0 +1,65 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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 org.apache.dubbo.common.utils;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Map tools
+ */
+public class MapUtils {
+
+    /**
+     * switch Map<String, Object> to Map<String, String>
+     *
+     * If the value of the original Map is not of type String, then toString() 
of value will be called
+     *
+     * @param originMap
+     * @return
+     */
+    public static Map<String, String> objectToStringMap(Map<String, Object> 
originMap) {
+        Map<String, String> newStrMap = new HashMap<>();
+
+        if (originMap == null) {
+            return newStrMap;
+        }
+
+        for (Map.Entry<String, Object> entry : originMap.entrySet()) {
+            String stringValue = convertToString(entry.getValue());
+            if (stringValue != null) {
+                newStrMap.put(entry.getKey(), stringValue);
+            }
+        }
+
+        return newStrMap;
+    }
+
+    /**
+     * use {@link Object#toString()} switch Obj to String
+     *
+     * @param obj
+     * @return
+     */
+    private static String convertToString(Object obj) {
+        if (obj == null) {
+            return null;
+        } else {
+            return obj.toString();
+        }
+    }
+}
diff --git 
a/dubbo-compatible/src/test/java/org/apache/dubbo/service/MockInvocation.java 
b/dubbo-compatible/src/test/java/org/apache/dubbo/service/MockInvocation.java
index a2cb52e..3a1b76e 100644
--- 
a/dubbo-compatible/src/test/java/org/apache/dubbo/service/MockInvocation.java
+++ 
b/dubbo-compatible/src/test/java/org/apache/dubbo/service/MockInvocation.java
@@ -16,7 +16,7 @@
  */
 package org.apache.dubbo.service;
 
-import org.apache.dubbo.rpc.AttachmentsAdapter;
+import org.apache.dubbo.common.utils.MapUtils;
 import org.apache.dubbo.rpc.Invocation;
 import org.apache.dubbo.rpc.Invoker;
 
@@ -79,7 +79,7 @@ public class MockInvocation implements Invocation {
     }
 
     public Map<String, String> getAttachments() {
-        return new AttachmentsAdapter.ObjectToStringMap(attachments);
+        return MapUtils.objectToStringMap(attachments);
     }
 
     @Override
diff --git 
a/dubbo-rpc/dubbo-rpc-api/src/main/java/org/apache/dubbo/rpc/AppResponse.java 
b/dubbo-rpc/dubbo-rpc-api/src/main/java/org/apache/dubbo/rpc/AppResponse.java
index 27df08a..65d859a 100644
--- 
a/dubbo-rpc/dubbo-rpc-api/src/main/java/org/apache/dubbo/rpc/AppResponse.java
+++ 
b/dubbo-rpc/dubbo-rpc-api/src/main/java/org/apache/dubbo/rpc/AppResponse.java
@@ -17,6 +17,7 @@
 package org.apache.dubbo.rpc;
 
 
+import org.apache.dubbo.common.utils.MapUtils;
 import org.apache.dubbo.rpc.proxy.InvokerInvocationHandler;
 
 import java.util.HashMap;
@@ -121,7 +122,7 @@ public class AppResponse implements Result {
     @Override
     @Deprecated
     public Map<String, String> getAttachments() {
-        return new AttachmentsAdapter.ObjectToStringMap(attachments);
+        return MapUtils.objectToStringMap(attachments);
     }
 
     @Override
diff --git 
a/dubbo-rpc/dubbo-rpc-api/src/main/java/org/apache/dubbo/rpc/AttachmentsAdapter.java
 
b/dubbo-rpc/dubbo-rpc-api/src/main/java/org/apache/dubbo/rpc/AttachmentsAdapter.java
index def349a..e6cb643 100644
--- 
a/dubbo-rpc/dubbo-rpc-api/src/main/java/org/apache/dubbo/rpc/AttachmentsAdapter.java
+++ 
b/dubbo-rpc/dubbo-rpc-api/src/main/java/org/apache/dubbo/rpc/AttachmentsAdapter.java
@@ -22,12 +22,18 @@ import java.util.Map;
 /**
  * This class provides map adapters to support attachments in RpcContext, 
Invocation and Result switch from
  * <String, String> to <String, Object>
+ *
+ * please use {@link org.apache.dubbo.common.utils.MapUtils}
+ *
  */
+@Deprecated
 public class AttachmentsAdapter {
 
+    @Deprecated
     public static class ObjectToStringMap extends HashMap<String, String> {
         private Map<String, Object> attachments;
 
+        @Deprecated
         public ObjectToStringMap(Map<String, Object> attachments) {
             for (Entry<String, Object> entry : attachments.entrySet()) {
                 String convertResult = convert(entry.getValue());
@@ -51,10 +57,11 @@ public class AttachmentsAdapter {
         }
 
         private String convert(Object obj) {
-            if (obj instanceof String) {
-                return (String) obj;
+            if (obj == null) {
+                return null;
+            } else {
+                return obj.toString();
             }
-            return null; // or JSON.toString(obj);
         }
 
         @Override
diff --git 
a/dubbo-rpc/dubbo-rpc-api/src/main/java/org/apache/dubbo/rpc/RpcContext.java 
b/dubbo-rpc/dubbo-rpc-api/src/main/java/org/apache/dubbo/rpc/RpcContext.java
index 8077067..0a48f7c 100644
--- a/dubbo-rpc/dubbo-rpc-api/src/main/java/org/apache/dubbo/rpc/RpcContext.java
+++ b/dubbo-rpc/dubbo-rpc-api/src/main/java/org/apache/dubbo/rpc/RpcContext.java
@@ -20,6 +20,7 @@ import org.apache.dubbo.common.Experimental;
 import org.apache.dubbo.common.URL;
 import org.apache.dubbo.common.threadlocal.InternalThreadLocal;
 import org.apache.dubbo.common.utils.CollectionUtils;
+import org.apache.dubbo.common.utils.MapUtils;
 import org.apache.dubbo.common.utils.NetUtils;
 import org.apache.dubbo.common.utils.StringUtils;
 
@@ -546,13 +547,15 @@ public class RpcContext {
     }
 
     /**
-     * get attachments.
+     * get String type attachments.
+     *
+     * Best to use {{@link #getObjectAttachments()}}
      *
      * @return attachments
      */
     @Deprecated
     public Map<String, String> getAttachments() {
-        return new 
AttachmentsAdapter.ObjectToStringMap(this.getObjectAttachments());
+        return MapUtils.objectToStringMap(this.getObjectAttachments());
     }
 
     /**
diff --git 
a/dubbo-rpc/dubbo-rpc-api/src/main/java/org/apache/dubbo/rpc/RpcInvocation.java 
b/dubbo-rpc/dubbo-rpc-api/src/main/java/org/apache/dubbo/rpc/RpcInvocation.java
index f94c001..116f3e6 100644
--- 
a/dubbo-rpc/dubbo-rpc-api/src/main/java/org/apache/dubbo/rpc/RpcInvocation.java
+++ 
b/dubbo-rpc/dubbo-rpc-api/src/main/java/org/apache/dubbo/rpc/RpcInvocation.java
@@ -17,6 +17,7 @@
 package org.apache.dubbo.rpc;
 
 import org.apache.dubbo.common.URL;
+import org.apache.dubbo.common.utils.MapUtils;
 import org.apache.dubbo.common.utils.ReflectUtils;
 import org.apache.dubbo.common.utils.StringUtils;
 import org.apache.dubbo.rpc.model.ApplicationModel;
@@ -277,7 +278,7 @@ public class RpcInvocation implements Invocation, 
Serializable {
     @Deprecated
     @Override
     public Map<String, String> getAttachments() {
-        return new AttachmentsAdapter.ObjectToStringMap(attachments);
+        return MapUtils.objectToStringMap(attachments);
     }
 
     @Deprecated
diff --git 
a/dubbo-rpc/dubbo-rpc-api/src/test/java/org/apache/dubbo/rpc/support/MockInvocation.java
 
b/dubbo-rpc/dubbo-rpc-api/src/test/java/org/apache/dubbo/rpc/support/MockInvocation.java
index 586c990..2eb2ddd 100644
--- 
a/dubbo-rpc/dubbo-rpc-api/src/test/java/org/apache/dubbo/rpc/support/MockInvocation.java
+++ 
b/dubbo-rpc/dubbo-rpc-api/src/test/java/org/apache/dubbo/rpc/support/MockInvocation.java
@@ -16,7 +16,7 @@
  */
 package org.apache.dubbo.rpc.support;
 
-import org.apache.dubbo.rpc.AttachmentsAdapter;
+import org.apache.dubbo.common.utils.MapUtils;
 import org.apache.dubbo.rpc.Invocation;
 import org.apache.dubbo.rpc.Invoker;
 
@@ -75,7 +75,7 @@ public class MockInvocation implements Invocation {
     }
 
     public Map<String, String> getAttachments() {
-        return new AttachmentsAdapter.ObjectToStringMap(attachments);
+        return MapUtils.objectToStringMap(attachments);
     }
 
     @Override

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