[ISSUE alibaba#8622] add the scope isolation strategy

- add setProperty,addProperties and containsKey methods
- remove PropertySourceSearch

client/src/main/java/com/alibaba/nacos/client/constant/Constants.java

@@ -35,7 +35,7 @@ public static class SysEnv {
 
         public static final String JM_SNAPSHOT_PATH = "JM.SNAPSHOT.PATH";
 
-        public static final String NACOS_ENVS_SEARCH = "nacos.envs.search";
+        public static final String NACOS_ENV_FIRST = "nacos.env.first";
 
     }
 

client/src/main/java/com/alibaba/nacos/client/env/AbstractPropertySource.java

@@ -16,6 +16,8 @@
 
 package com.alibaba.nacos.client.env;
 
+import java.util.Properties;
+
 abstract class AbstractPropertySource {
 
     /**
@@ -31,4 +33,17 @@ abstract class AbstractPropertySource {
      */
     abstract String getProperty(String key);
 
+    /**
+     * Tests if the specified object is a key in this propertySource.
+     * @param key key – possible key
+     * @return true if and only if the specified object is a key in this propertySource, false otherwise.
+     */
+    abstract boolean containsKey(String key);
+
+    /**
+     * to properties.
+     * @return properties
+     */
+    abstract Properties asProperties();
+
 }

client/src/main/java/com/alibaba/nacos/client/env/ApplyScope.java

@@ -0,0 +1,40 @@
+/*
+ * Copyright 1999-2022 Alibaba Group Holding Ltd.
+ *
+ * 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.nacos.client.env;
+
+/**
+ * environment apply scope.
+ * @author onewe
+ */
+public enum ApplyScope {
+    /**
+     * global scope.
+     */
+    GLOBAL,
+    /**
+     * config module scope.
+     */
+    CONFIG,
+    /**
+     * naming module scope.
+     */
+    NAMING,
+    /**
+     * naming maintain module scope.
+     */
+    NAMING_MAINTAIN
+}

client/src/main/java/com/alibaba/nacos/client/env/DefaultSettingPropertySource.java

@@ -21,7 +21,6 @@
 import org.slf4j.LoggerFactory;
 
 import java.io.InputStream;
-import java.net.URL;
 import java.util.Properties;
 
 class DefaultSettingPropertySource extends AbstractPropertySource {
@@ -33,12 +32,10 @@ class DefaultSettingPropertySource extends AbstractPropertySource {
     private final Properties defaultSetting = new Properties();
 
     DefaultSettingPropertySource() {
-        try {
-            final URL resourceUrl = ResourceUtils.getResourceUrl(DEFAULT_SETTING_PATH);
-            final InputStream inputStream = resourceUrl.openStream();
+        try (final InputStream inputStream = ResourceUtils.getResourceUrl(DEFAULT_SETTING_PATH).openStream()) {
             defaultSetting.load(inputStream);
         } catch (Exception e) {
-            LOGGER.warn("load default setting failed");
+            LOGGER.error("load default setting failed", e);
         }
     }
 
@@ -51,4 +48,16 @@ SourceType getType() {
     String getProperty(String key) {
         return defaultSetting.getProperty(key);
     }
+
+    @Override
+    boolean containsKey(String key) {
+        return defaultSetting.containsKey(key);
+    }
+
+    @Override
+    Properties asProperties() {
+        Properties properties = new Properties();
+        properties.putAll(defaultSetting);
+        return properties;
+    }
 }

client/src/main/java/com/alibaba/nacos/client/env/JvmArgsPropertySource.java

@@ -20,11 +20,7 @@
 
 class JvmArgsPropertySource extends AbstractPropertySource {
 
-    private final Properties properties;
-
-    JvmArgsPropertySource() {
-        this.properties = System.getProperties();
-    }
+    private final Properties properties = new Properties(System.getProperties());
 
     @Override
     SourceType getType() {
@@ -35,4 +31,16 @@ SourceType getType() {
     String getProperty(String key) {
         return properties.getProperty(key);
     }
+
+    @Override
+    boolean containsKey(String key) {
+        return properties.containsKey(key);
+    }
+
+    @Override
+    Properties asProperties() {
+        Properties properties = new Properties();
+        properties.putAll(this.properties);
+        return properties;
+    }
 }

client/src/main/java/com/alibaba/nacos/client/env/NacosEnvironment.java

@@ -16,6 +16,8 @@
 
 package com.alibaba.nacos.client.env;
 
+import java.util.Properties;
+
 /**
  * nacos env interface.
  *
@@ -87,4 +89,29 @@ public interface NacosEnvironment {
      */
     Long getLong(String key, Long defaultValue);
 
+    /**
+     * set property.
+     * @param key key
+     * @param value value
+     */
+    void setProperty(String key, String value);
+
+    /**
+     * add properties.
+     * @param properties properties
+     */
+    void addProperties(Properties properties);
+
+    /**
+     * Tests if the specified object is a key in this environment.
+     * @param key key – possible key
+     * @return true if and only if the specified object is a key in this environment, false otherwise.
+     */
+    boolean containsKey(String key);
+
+    /**
+     * get properties from environment.
+     * @return properties
+     */
+    Properties asProperties();
 }