Catch exception which throws on the listener notifying when loading extension success.

core/api/src/main/java/com/alipay/sofa/rpc/ext/ExtensionLoader.java

@@ -346,9 +346,16 @@ private ExtensionClass<T> buildClass(Extension extension, Class<? extends T> imp
     }
 
     private void loadSuccess(String alias, ExtensionClass<T> extensionClass) {
-        all.put(alias, extensionClass);
         if (listener != null) {
-            listener.onLoad(extensionClass); // 加载完毕，通知监听器
+            try {
+                listener.onLoad(extensionClass); // 加载完毕，通知监听器
+                all.put(alias, extensionClass);
+            } catch (Exception e) {
+                LOGGER.error("Error when load extension of extensible " + interfaceClass + " with alias: "
+                    + alias + ".", e);
+            }
+        } else {
+            all.put(alias, extensionClass);
         }
     }
 

core/api/src/test/java/com/alipay/sofa/rpc/ext/ExtensionLoaderTest.java

@@ -82,6 +82,25 @@ public void testLoadFromFile() throws Exception {
         Assert.assertNotNull(extensionClass);
         Assert.assertTrue(extensionClass.getOrder() == 123);
 
+        loader = new ExtensionLoader<Filter>(Filter.class, false, new TestErrorLoadListener());
+        loader.loadFromFile("META-INF/ext3/");
+        Assert.assertFalse(loader.getAllExtensions().isEmpty());
+        extensionClass = loader.getExtensionClass("rightxx0");
+        Assert.assertNull(extensionClass);
+        extensionClass = loader.getExtensionClass("rightxx1");
+        Assert.assertNotNull(extensionClass);
+        Assert.assertTrue(extensionClass.getOrder() == 128);
+
+        loader = new ExtensionLoader<Filter>(Filter.class, false, new TestLoadListener());
+        loader.loadFromFile("META-INF/ext4/");
+        Assert.assertFalse(loader.getAllExtensions().isEmpty());
+        extensionClass = loader.getExtensionClass("rightxx0");
+        Assert.assertNotNull(extensionClass);
+        Assert.assertTrue(extensionClass.getOrder() == 123);
+        extensionClass = loader.getExtensionClass("rightxx1");
+        Assert.assertNotNull(extensionClass);
+        Assert.assertTrue(extensionClass.getOrder() == 128);
+
     }
 
     @Test

core/api/src/test/java/com/alipay/sofa/rpc/ext/RightFilter1.java

@@ -27,7 +27,7 @@
  *
  * @author <a href="mailto:zhanggeng.zg@antfin.com">GengZhang</a>
  */
-@Extension("rightxx1")
+@Extension(value = "rightxx1", order = 128)
 public class RightFilter1 extends Filter {
     @Override
     public SofaResponse invoke(FilterInvoker invoker, SofaRequest request) throws SofaRpcException {

core/api/src/test/java/com/alipay/sofa/rpc/ext/TestErrorLoadListener.java

@@ -0,0 +1,31 @@
+/*
+ * 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 com.alipay.sofa.rpc.ext;
+
+import com.alipay.sofa.rpc.filter.Filter;
+
+/**
+ * @author <a href="mailto:zhanggeng.zg@antfin.com">GengZhang</a>
+ */
+public class TestErrorLoadListener implements ExtensionLoaderListener<Filter> {
+    @Override
+    public void onLoad(ExtensionClass extensionClass) {
+        if ("rightxx0".equals(extensionClass.getAlias())) {
+            throw new NullPointerException();
+        }
+    }
+}

core/api/src/test/java/com/alipay/sofa/rpc/ext/TestLoadListener.java

@@ -0,0 +1,29 @@
+/*
+ * 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 com.alipay.sofa.rpc.ext;
+
+import com.alipay.sofa.rpc.filter.Filter;
+
+/**
+ * @author <a href="mailto:zhanggeng.zg@antfin.com">GengZhang</a>
+ */
+public class TestLoadListener implements ExtensionLoaderListener<Filter> {
+    @Override
+    public void onLoad(ExtensionClass extensionClass) {
+
+    }
+}

core/api/src/test/resources/META-INF/ext3/com.alipay.sofa.rpc.filter.Filter

@@ -0,0 +1,2 @@
+com.alipay.sofa.rpc.ext.RightFilter0
+com.alipay.sofa.rpc.ext.RightFilter1

core/api/src/test/resources/META-INF/ext4/com.alipay.sofa.rpc.filter.Filter

@@ -0,0 +1,2 @@
+com.alipay.sofa.rpc.ext.RightFilter0
+com.alipay.sofa.rpc.ext.RightFilter1