[GitHub] [servicecomb-java-chassis] wujimin commented on a change in pull request #1180: [SCB-1251] Reduce archaius callback

[GitBox <gi...@apache.org>]

wujimin commented on a change in pull request #1180: [SCB-1251] Reduce archaius callback
URL: https://github.com/apache/servicecomb-java-chassis/pull/1180#discussion_r275260767
 
 

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 File path: foundations/foundation-config/src/main/java/org/apache/servicecomb/config/priority/PriorityPropertyManager.java
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 @@ -0,0 +1,136 @@
+/*
+ * 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.servicecomb.config.priority;
+
+import java.lang.reflect.Type;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import org.apache.commons.configuration.event.ConfigurationEvent;
+import org.apache.commons.configuration.event.ConfigurationListener;
+import org.apache.servicecomb.config.inject.ConfigObjectFactory;
+import org.apache.servicecomb.foundation.common.concurrent.ConcurrentHashMapEx;
+
+import com.netflix.config.ConfigurationManager;
+import com.netflix.config.DynamicPropertyFactory;
+
+public class PriorityPropertyManager {
+  private ConfigurationListener configurationListener = this::configurationListener;
+
+  private Map<PriorityProperty<?>, PriorityProperty<?>> priorityPropertyMap = new ConcurrentHashMapEx<>();
+
+  private Map<Object, List<PriorityProperty<?>>> configObjectMap = new ConcurrentHashMapEx<>();
+
+  // will be reset to null after register or unregister
+  // and build when configuration changed
+  private Map<String, List<PriorityProperty<?>>> keyCache;
+
+  public PriorityPropertyManager() {
+    // make sure create a DynamicPropertyFactory instance
+    // otherwise will cause wrong order of configurationListeners
+    DynamicPropertyFactory.getInstance();
+
+    ConfigurationManager.getConfigInstance().addConfigurationListener(configurationListener);
+  }
+
+  public void close() {
+    ConfigurationManager.getConfigInstance().removeConfigurationListener(configurationListener);
+  }
+
+  public synchronized void configurationListener(ConfigurationEvent event) {
+    if (event.isBeforeUpdate()) {
+      return;
+    }
+
+    if (keyCache == null) {
+      keyCache = new ConcurrentHashMapEx<>();
+      updateCache(priorityPropertyMap.values());
+      configObjectMap.values().stream().forEach(this::updateCache);
+    }
+
+    keyCache.getOrDefault(event.getPropertyName(), Collections.emptyList()).stream()
 
 Review comment:
   done

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