Polish code and document of sentinel-sofa-rpc-adapter

Signed-off-by: Eric Zhao <sczyh16@gmail.com>

sentinel-adapter/sentinel-sofa-rpc-adapter/README.md

@@ -28,6 +28,7 @@ consumerConfig.setParameter("sofa.rpc.sentinel.enabled", "false");
 ```
 
 or add setting in `rpc-config.json` file, and its priority is lower than above.
+
 ```json
 {
   "sofa.rpc.sentinel.enabled": true

sentinel-adapter/sentinel-sofa-rpc-adapter/src/main/java/com/alibaba/csp/sentinel/adapter/sofa/rpc/AbstractSofaRpcFilter.java

@@ -1,8 +1,23 @@
+/*
+ * Copyright 1999-2020 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
+ *
+ *      https://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.csp.sentinel.adapter.sofa.rpc;
 
 import com.alibaba.csp.sentinel.Entry;
 import com.alibaba.csp.sentinel.Tracer;
-import com.alibaba.csp.sentinel.adapter.sofa.rpc.config.SofaRpcConfig;
+
 import com.alipay.sofa.rpc.common.RpcConfigs;
 import com.alipay.sofa.rpc.common.utils.StringUtils;
 import com.alipay.sofa.rpc.config.AbstractInterfaceConfig;
@@ -19,14 +34,14 @@ abstract class AbstractSofaRpcFilter extends Filter {
 
     @Override
     public boolean needToLoad(FilterInvoker invoker) {
-        AbstractInterfaceConfig config = invoker.getConfig();
+        AbstractInterfaceConfig<?, ?> config = invoker.getConfig();
 
-        String enabled = config.getParameter(SofaRpcConfig.SOFA_RPC_SENTINEL_ENABLED);
+        String enabled = config.getParameter(SentinelConstants.SOFA_RPC_SENTINEL_ENABLED);
         if (StringUtils.isNotBlank(enabled)) {
-            return Boolean.valueOf(enabled);
+            return Boolean.parseBoolean(enabled);
         }
 
-        return RpcConfigs.getOrDefaultValue(SofaRpcConfig.SOFA_RPC_SENTINEL_ENABLED, true);
+        return RpcConfigs.getOrDefaultValue(SentinelConstants.SOFA_RPC_SENTINEL_ENABLED, true);
     }
 
     protected void traceResponseException(SofaResponse response, Entry interfaceEntry, Entry methodEntry) {

sentinel-adapter/sentinel-sofa-rpc-adapter/src/main/java/com/alibaba/csp/sentinel/adapter/sofa/rpc/SentinelConstants.java

@@ -0,0 +1,27 @@
+/*
+ * Copyright 1999-2020 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
+ *
+ *      https://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.csp.sentinel.adapter.sofa.rpc;
+
+/**
+ * @author cdfive
+ * @since 1.7.2
+ */
+public final class SentinelConstants {
+
+    public static final String SOFA_RPC_SENTINEL_ENABLED = "sofa.rpc.sentinel.enabled";
+
+    private SentinelConstants() {}
+}

sentinel-adapter/sentinel-sofa-rpc-adapter/src/main/java/com/alibaba/csp/sentinel/adapter/sofa/rpc/SentinelSofaRpcConsumerFilter.java

@@ -18,6 +18,7 @@ package com.alibaba.csp.sentinel.adapter.sofa.rpc;
 import com.alibaba.csp.sentinel.*;
 import com.alibaba.csp.sentinel.adapter.sofa.rpc.fallback.SofaRpcFallbackRegistry;
 import com.alibaba.csp.sentinel.slots.block.BlockException;
+
 import com.alipay.sofa.rpc.common.RpcConstants;
 import com.alipay.sofa.rpc.core.exception.SofaRpcException;
 import com.alipay.sofa.rpc.core.request.SofaRequest;
@@ -59,7 +60,8 @@ public class SentinelSofaRpcConsumerFilter extends AbstractSofaRpcFilter {
         Entry methodEntry = null;
         try {
             interfaceEntry = SphU.entry(interfaceResourceName, ResourceTypeConstants.COMMON_RPC, EntryType.OUT);
-            methodEntry = SphU.entry(methodResourceName, ResourceTypeConstants.COMMON_RPC, EntryType.OUT, getMethodArguments(request));
+            methodEntry = SphU.entry(methodResourceName, ResourceTypeConstants.COMMON_RPC,
+                EntryType.OUT, getMethodArguments(request));
 
             SofaResponse response = invoker.invoke(request);
 

sentinel-adapter/sentinel-sofa-rpc-adapter/src/main/java/com/alibaba/csp/sentinel/adapter/sofa/rpc/SentinelSofaRpcProviderFilter.java

@@ -19,6 +19,7 @@ import com.alibaba.csp.sentinel.*;
 import com.alibaba.csp.sentinel.adapter.sofa.rpc.fallback.SofaRpcFallbackRegistry;
 import com.alibaba.csp.sentinel.context.ContextUtil;
 import com.alibaba.csp.sentinel.slots.block.BlockException;
+
 import com.alipay.sofa.rpc.common.RpcConstants;
 import com.alipay.sofa.rpc.core.exception.SofaRpcException;
 import com.alipay.sofa.rpc.core.request.SofaRequest;
@@ -58,17 +59,18 @@ public class SentinelSofaRpcProviderFilter extends AbstractSofaRpcFilter {
             return invoker.invoke(request);
         }
 
-        String applicationName = getApplicationName(request);
+        String callerApp = getApplicationName(request);
         String interfaceResourceName = getInterfaceResourceName(request);
         String methodResourceName = getMethodResourceName(request);
 
         Entry interfaceEntry = null;
         Entry methodEntry = null;
         try {
-            ContextUtil.enter(methodResourceName, applicationName);
+            ContextUtil.enter(methodResourceName, callerApp);
 
             interfaceEntry = SphU.entry(interfaceResourceName, ResourceTypeConstants.COMMON_RPC, EntryType.IN);
-            methodEntry = SphU.entry(methodResourceName, ResourceTypeConstants.COMMON_RPC, EntryType.IN, getMethodArguments(request));
+            methodEntry = SphU.entry(methodResourceName, ResourceTypeConstants.COMMON_RPC,
+                EntryType.IN, getMethodArguments(request));
 
             SofaResponse response = invoker.invoke(request);
 
@@ -82,11 +84,9 @@ public class SentinelSofaRpcProviderFilter extends AbstractSofaRpcFilter {
             if (methodEntry != null) {
                 methodEntry.exit(1, getMethodArguments(request));
             }
-
             if (interfaceEntry != null) {
                 interfaceEntry.exit();
             }
-
             ContextUtil.exit();
         }
     }

sentinel-adapter/sentinel-sofa-rpc-adapter/src/main/java/com/alibaba/csp/sentinel/adapter/sofa/rpc/SofaRpcUtils.java

@@ -56,4 +56,6 @@ public class SofaRpcUtils {
     public static Object[] getMethodArguments(SofaRequest request) {
         return request.getMethodArgs();
     }
+
+    private SofaRpcUtils() {}
 }

sentinel-adapter/sentinel-sofa-rpc-adapter/src/main/java/com/alibaba/csp/sentinel/adapter/sofa/rpc/config/SofaRpcConfig.java

@@ -1,9 +0,0 @@
-package com.alibaba.csp.sentinel.adapter.sofa.rpc.config;
-
-/**
- * @author cdfive
- */
-public class SofaRpcConfig {
-
-    public static final String SOFA_RPC_SENTINEL_ENABLED = "sofa.rpc.sentinel.enabled";
-}

sentinel-adapter/sentinel-sofa-rpc-adapter/src/main/java/com/alibaba/csp/sentinel/adapter/sofa/rpc/fallback/SofaRpcFallbackRegistry.java

@@ -15,6 +15,8 @@
  */
 package com.alibaba.csp.sentinel.adapter.sofa.rpc.fallback;
 
+import com.alibaba.csp.sentinel.util.AssertUtil;
+
 /**
  * Global Sentinel fallback registry for SOFARPC services.
  *
@@ -30,6 +32,7 @@ public final class SofaRpcFallbackRegistry {
     }
 
     public static void setProviderFallback(SofaRpcFallback providerFallback) {
+        AssertUtil.notNull(providerFallback, "providerFallback cannot be null");
         SofaRpcFallbackRegistry.providerFallback = providerFallback;
     }
 
@@ -38,6 +41,7 @@ public final class SofaRpcFallbackRegistry {
     }
 
     public static void setConsumerFallback(SofaRpcFallback consumerFallback) {
+        AssertUtil.notNull(consumerFallback, "consumerFallback cannot be null");
         SofaRpcFallbackRegistry.consumerFallback = consumerFallback;
     }
 

sentinel-adapter/sentinel-sofa-rpc-adapter/src/test/java/com/alibaba/csp/sentinel/adapter/sofa/rpc/AbstractSofaRpcFilterTest.java

@@ -1,6 +1,5 @@
 package com.alibaba.csp.sentinel.adapter.sofa.rpc;
 
-import com.alibaba.csp.sentinel.adapter.sofa.rpc.config.SofaRpcConfig;
 import com.alipay.sofa.rpc.codec.Serializer;
 import com.alipay.sofa.rpc.common.RpcConfigs;
 import com.alipay.sofa.rpc.config.ConsumerConfig;
@@ -23,12 +22,12 @@ public class AbstractSofaRpcFilterTest {
 
     @Before
     public void setUp() {
-        removeRpcConfig(SofaRpcConfig.SOFA_RPC_SENTINEL_ENABLED);
+        removeRpcConfig(SentinelConstants.SOFA_RPC_SENTINEL_ENABLED);
     }
 
     @After
     public void cleanUp() {
-        removeRpcConfig(SofaRpcConfig.SOFA_RPC_SENTINEL_ENABLED);
+        removeRpcConfig(SentinelConstants.SOFA_RPC_SENTINEL_ENABLED);
     }
 
     @Test
@@ -40,13 +39,13 @@ public class AbstractSofaRpcFilterTest {
         FilterInvoker invoker = new FilterInvoker(null, null, providerConfig);
         assertTrue(providerFilter.needToLoad(invoker));
 
-        providerConfig.setParameter(SofaRpcConfig.SOFA_RPC_SENTINEL_ENABLED, "false");
+        providerConfig.setParameter(SentinelConstants.SOFA_RPC_SENTINEL_ENABLED, "false");
         assertFalse(providerFilter.needToLoad(invoker));
 
-        providerConfig.setParameter(SofaRpcConfig.SOFA_RPC_SENTINEL_ENABLED, "");
+        providerConfig.setParameter(SentinelConstants.SOFA_RPC_SENTINEL_ENABLED, "");
         assertTrue(providerFilter.needToLoad(invoker));
 
-        RpcConfigs.putValue(SofaRpcConfig.SOFA_RPC_SENTINEL_ENABLED, "false");
+        RpcConfigs.putValue(SentinelConstants.SOFA_RPC_SENTINEL_ENABLED, "false");
         assertFalse(providerFilter.needToLoad(invoker));
     }
 
@@ -59,13 +58,13 @@ public class AbstractSofaRpcFilterTest {
         FilterInvoker invoker = new FilterInvoker(null, null, consumerConfig);
         assertTrue(consumerFilter.needToLoad(invoker));
 
-        consumerConfig.setParameter(SofaRpcConfig.SOFA_RPC_SENTINEL_ENABLED, "false");
+        consumerConfig.setParameter(SentinelConstants.SOFA_RPC_SENTINEL_ENABLED, "false");
         assertFalse(consumerFilter.needToLoad(invoker));
 
-        consumerConfig.setParameter(SofaRpcConfig.SOFA_RPC_SENTINEL_ENABLED, "");
+        consumerConfig.setParameter(SentinelConstants.SOFA_RPC_SENTINEL_ENABLED, "");
         assertTrue(consumerFilter.needToLoad(invoker));
 
-        RpcConfigs.putValue(SofaRpcConfig.SOFA_RPC_SENTINEL_ENABLED, "false");
+        RpcConfigs.putValue(SentinelConstants.SOFA_RPC_SENTINEL_ENABLED, "false");
         assertFalse(consumerFilter.needToLoad(invoker));
     }
 
@@ -85,14 +84,14 @@ public class AbstractSofaRpcFilterTest {
         FilterInvoker consumerInvoker = new FilterInvoker(null, null, consumerConfig);
         assertTrue(consumerFilter.needToLoad(consumerInvoker));
 
-        providerConfig.setParameter(SofaRpcConfig.SOFA_RPC_SENTINEL_ENABLED, "false");
+        providerConfig.setParameter(SentinelConstants.SOFA_RPC_SENTINEL_ENABLED, "false");
         assertFalse(providerFilter.needToLoad(providerInvoker));
         assertTrue(consumerFilter.needToLoad(consumerInvoker));
 
-        providerConfig.setParameter(SofaRpcConfig.SOFA_RPC_SENTINEL_ENABLED, "");
+        providerConfig.setParameter(SentinelConstants.SOFA_RPC_SENTINEL_ENABLED, "");
         assertTrue(providerFilter.needToLoad(providerInvoker));
 
-        RpcConfigs.putValue(SofaRpcConfig.SOFA_RPC_SENTINEL_ENABLED, "false");
+        RpcConfigs.putValue(SentinelConstants.SOFA_RPC_SENTINEL_ENABLED, "false");
         assertFalse(providerFilter.needToLoad(providerInvoker));
         assertFalse(consumerFilter.needToLoad(consumerInvoker));
     }

sentinel-demo/sentinel-demo-sofa-rpc/README.md

@@ -12,7 +12,7 @@ Sentinel 提供了与 SOFARPC 整合的模块 - `sentinel-sofa-rpc-adapter`，
 
 引入此依赖后，SOFARPC 的服务接口和方法（包括调用端和服务端）就会成为 Sentinel 中的资源，在配置了规则后就可以自动享受到 Sentinel 的防护能力。
 
-> **注：若希望接入 Dashboard，请参考demo中的注释添加VM参数，只引入`sentinel-sofa-rpc-adapter`无法接入控制台！**
+> **注：若希望接入 Dashboard，请参考 demo 中的注释添加启动参数。只引入 `sentinel-sofa-rpc-adapter` 依赖无法接入控制台！**
 
 若不希望开启 Sentinel SOFARPC Adapter 中的某个 Filter，可以手动关闭对应的 Filter，比如：
 
@@ -21,7 +21,7 @@ providerConfig.setParameter("sofa.rpc.sentinel.enabled", "false");
 consumerConfig.setParameter("sofa.rpc.sentinel.enabled", "false");
 ```
 
-或者在`rpc-config.json`文件中设置，它的优先级要低一些。
+或者在 `rpc-config.json` 文件中设置，它的优先级要低一些。
 
 ```json
 {
@@ -29,14 +29,14 @@ consumerConfig.setParameter("sofa.rpc.sentinel.enabled", "false");
 }
 ```
 
-# 运行Demo
+## 运行 Demo
 
-1. 启动控制台，运行`DashboardApplication`
+1. 启动控制台，运行 `DashboardApplication`
 
-2. 启动Provider，运行`DemoProvider`（VM参数：`-Dproject.name=DemoProvider -Dcsp.sentinel.dashboard.server=localhost:8080`）
+2. 启动 Provider，运行 `DemoProvider`（VM参数：`-Dproject.name=DemoProvider -Dcsp.sentinel.dashboard.server=localhost:8080`）
 
-3. 启动Consumer，运行`DemoConsumer`（VM参数：`-Dproject.name=DemoConsumer -Dcsp.sentinel.dashboard.server=localhost:8080`）
+3. 启动 Consumer，运行 `DemoConsumer`（VM参数：`-Dproject.name=DemoConsumer -Dcsp.sentinel.dashboard.server=localhost:8080`）
 
 通过控制台实时监控、簇点链路菜单观察接口调用、资源情况；对资源设置不同流控规则，进行观察和调试。
 
-参考：[Sentinel控制台](https://github.com/alibaba/Sentinel/wiki/控制台).
+参考：[Sentinel 控制台文档](https://github.com/alibaba/Sentinel/wiki/控制台).