feat: 👍 aop外观模式

pom.xml

@@ -16,6 +16,23 @@
 
     <dependencies>
 
+        <!--aop-->
+        <dependency>
+            <groupId>org.aspectj</groupId>
+            <artifactId>aspectjweaver</artifactId>
+            <version>1.9.7</version>
+        </dependency>
+        <!--cglib-->
+        <dependency>
+            <groupId>cglib</groupId>
+            <artifactId>cglib</artifactId>
+            <version>3.3.0</version>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-core</artifactId>
+            <version>6.1.2</version>
+        </dependency>
         <!--google guava-->
         <dependency>
             <groupId>com.google.guava</groupId>

src/main/java/cc/niushuai/demo/designpattern/creatormodel/facade/_01/AopServiceImpl.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2023 niushuai233 niushuai.cc
+ *
+ * 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 cc.niushuai.demo.designpattern.creatormodel.facade._01;
+
+import cc.niushuai.demo.designpattern.creatormodel.facade._01.entity.AopUser;
+
+/**
+ * aop service implementation
+ *
+ * @author niushuai233
+ * @date 2024/1/29 17:29
+ * @since 0.0.1
+ */
+public class AopServiceImpl implements AopUserService {
+
+    static {
+        users.put("zhangsan", new AopUser(1, "zhangsan", "张三"));
+        users.put("lisi", new AopUser(2, "lisi", "李四"));
+        users.put("wanger", new AopUser(3, "wanger", "王二"));
+        users.put("mazi", new AopUser(4, "mazi", "麻子"));
+        users.put("fox1", new AopUser(5, "fox1", "狐一"));
+    }
+}

src/main/java/cc/niushuai/demo/designpattern/creatormodel/facade/_01/AopUserService.java

@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2023 niushuai233 niushuai.cc
+ *
+ * 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 cc.niushuai.demo.designpattern.creatormodel.facade._01;
+
+import cc.niushuai.demo.designpattern.creatormodel.facade._01.entity.AopUser;
+import cn.hutool.core.util.NumberUtil;
+import cn.hutool.core.util.StrUtil;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Set;
+
+/**
+ * aop实现外观模式
+ *
+ * @author niushuai233
+ * @date 2024/1/29 11:39
+ * @since 0.0.1
+ */
+public interface AopUserService {
+
+    Map<String, AopUser> users = new HashMap<String, AopUser>();
+
+    default Set<String> userKeys() {
+        return users.keySet();
+    }
+
+    default AopUser queryUserById(Integer id) {
+        if (null == id) {
+            return null;
+        }
+        return users.values().stream().filter(item -> id.equals(item.getId())).findFirst().orElse(null);
+    }
+
+    default AopUser queryUserByName(String username) {
+        if (StrUtil.isEmpty(username)) {
+            return null;
+        }
+        return users.getOrDefault(username, null);
+    }
+
+    default AopUser queryUser(Object param) {
+        if (NumberUtil.isNumber(param.toString())) {
+            AopUser aopUser = queryUserById((Integer) param);
+            if (null != aopUser) {
+                return aopUser;
+            }
+        }
+
+        return queryUserByName((String) param);
+    }
+
+    default AopUser aopQueryUser(Object param) {
+
+        return null;
+    }
+}

src/main/java/cc/niushuai/demo/designpattern/creatormodel/facade/_01/HelloAop.java

@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2023 niushuai233 niushuai.cc
+ *
+ * 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 cc.niushuai.demo.designpattern.creatormodel.facade._01;
+
+import cn.hutool.aop.aspects.SimpleAspect;
+
+import java.lang.reflect.Method;
+
+/**
+ * hello aop
+ *
+ * @author niushuai233
+ * @date 2024/1/29 17:16
+ * @since 0.0.1
+ */
+public class HelloAop extends SimpleAspect {
+
+    @Override
+    public boolean before(Object target, Method method, Object[] args) {
+        return super.before(target, method, args);
+    }
+
+    @Override
+    public boolean after(Object target, Method method, Object[] args, Object returnVal) {
+        return super.after(target, method, args, returnVal);
+    }
+
+    @Override
+    public boolean afterException(Object target, Method method, Object[] args, Throwable e) {
+        return super.afterException(target, method, args, e);
+    }
+}

src/main/java/cc/niushuai/demo/designpattern/creatormodel/facade/_01/entity/AopUser.java

@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2023 niushuai233 niushuai.cc
+ *
+ * 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 cc.niushuai.demo.designpattern.creatormodel.facade._01.entity;
+
+import lombok.Data;
+
+/**
+ * aop user entity
+ *
+ * @author niushuai233
+ * @date 2024/1/29 16:56
+ * @since 0.0.1
+ */
+@Data
+public class AopUser {
+
+    private Integer id;
+    private String username;
+    private String realName;
+
+    public AopUser() {
+    }
+
+    public AopUser(Integer id, String username, String realName) {
+        this.id = id;
+        this.username = username;
+        this.realName = realName;
+    }
+}

src/main/java/cc/niushuai/demo/designpattern/creatormodel/facade/package-info.java

@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2023 niushuai233 niushuai.cc
+ *
+ * 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.
+ */
+
+/**
+ * 外观模式
+ *
+ * @author niushuai233
+ * @date 2024/1/29 11:40
+ * @since 0.0.1
+ */
+package cc.niushuai.demo.designpattern.creatormodel.facade;

src/test/java/cc/niushuai/demo/designpattern/creatormodel/facade/_01/AopUserTest.java

@@ -0,0 +1,151 @@
+/*
+ * Copyright (C) 2023 niushuai233 niushuai.cc
+ *
+ * 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 cc.niushuai.demo.designpattern.creatormodel.facade._01;
+
+import cn.hutool.aop.ProxyUtil;
+import cn.hutool.aop.aspects.TimeIntervalAspect;
+import cn.hutool.aop.interceptor.CglibInterceptor;
+import cn.hutool.aop.interceptor.JdkInterceptor;
+import net.sf.cglib.proxy.Enhancer;
+import org.junit.jupiter.api.Test;
+import org.springframework.cglib.proxy.MethodInterceptor;
+import org.springframework.cglib.proxy.MethodProxy;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
+/**
+ * aop user test
+ *
+ * @author niushuai233
+ * @date 2024/1/29 17:18
+ * @since 0.0.1
+ */
+public class AopUserTest {
+
+
+    @Test
+    public void test1() {
+        AopUserService service = new AopServiceImpl();
+
+        System.out.println(service.queryUserById(1));
+        System.out.println(service.queryUserByName("fox1"));
+        System.out.println();
+    }
+
+    @Test
+    public void test2() {
+        AopUserService service = new AopServiceImpl();
+
+        System.out.println(service.queryUser(1));
+        System.out.println(service.queryUser("fox1"));
+        System.out.println();
+    }
+
+    @Test
+    public void test3() {
+
+        AopUserService service = new AopServiceImpl();
+
+        AopUserService proxy = ProxyUtil.newProxyInstance(
+                service.getClass().getClassLoader(),
+                new JdkInterceptor(service, new TimeIntervalAspect()),
+                service.getClass().getInterfaces());
+
+        System.out.println(proxy.queryUser(1));
+        System.out.println(proxy.queryUser("fox1"));
+        System.out.println();
+    }
+
+    /**
+     * jdk17 cglib 存在问题 无法通过
+     * 可使用spring-core中的cglib替代
+     *
+     * @return
+     * @author niushuai233
+     * @date 2024/1/29 17:49
+     * @since 0.0.1
+     */
+    @Test
+    public void test4() {
+
+        AopServiceImpl service = new AopServiceImpl();
+
+        Enhancer enhancer = new Enhancer();
+        enhancer.setSuperclass(service.getClass());
+        enhancer.setCallback(new CglibInterceptor(service, new TimeIntervalAspect()));
+        AopServiceImpl proxy = (AopServiceImpl) enhancer.create();
+
+        System.out.println(proxy.queryUser(1));
+        System.out.println(proxy.queryUser("fox1"));
+        System.out.println();
+    }
+
+    /**
+     * 解决test4中cglib无法正常运行问题
+     *
+     * @return
+     * @author niushuai233
+     * @date 2024/1/29 18:03
+     * @since 0.0.1
+     */
+    @Test
+    public void test5() {
+
+        AopServiceImpl service = new AopServiceImpl();
+
+        org.springframework.cglib.proxy.Enhancer enhancer = new org.springframework.cglib.proxy.Enhancer();
+
+        enhancer.setSuperclass(service.getClass());
+        enhancer.setCallback(new MethodInterceptor() {
+            @Override
+            public Object intercept(Object obj, Method method, Object[] args, MethodProxy proxy) throws Throwable {
+                TimeIntervalAspect aspect = new TimeIntervalAspect();
+                final Object target = service;
+                Object result = null;
+                // 开始前回调
+                if (aspect.before(target, method, args)) {
+                    try {
+//                        result = method.invoke(target, args);
+                        result = proxy.invoke(target, args);
+                    } catch (final Throwable e) {
+                        Throwable throwable = e;
+                        if (throwable instanceof InvocationTargetException) {
+                            throwable = ((InvocationTargetException) throwable).getTargetException();
+                        }
+                        // 异常回调（只捕获业务代码导致的异常，而非反射导致的异常）
+                        if (aspect.afterException(target, method, args, throwable)) {
+                            throw throwable;
+                        }
+                    }
+                }
+
+                // 结束执行回调
+                if (aspect.after(target, method, args, result)) {
+                    return result;
+                }
+                return null;
+            }
+        });
+        AopServiceImpl proxy = (AopServiceImpl) enhancer.create();
+
+        System.out.println(proxy.queryUser(1));
+        System.out.println(proxy.queryUser("fox1"));
+        System.out.println();
+    }
+
+}