Custom aop (#1451)

spring-custom-aop/pom.xml

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+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>com.baeldung</groupId>
+    <artifactId>spring-custom-aop</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <packaging>war</packaging>
+    <name>spring-custom-aop</name>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>1.5.2.RELEASE</version>
+    </parent>
+
+    <dependencies>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-aop</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+</project>

spring-custom-aop/src/main/java/org/baeldung/Application.java

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+package org.baeldung;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Application {
+
+
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+}

spring-custom-aop/src/main/java/org/baeldung/ExampleAspect.java

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+package org.baeldung;
+
+import org.aspectj.lang.ProceedingJoinPoint;
+import org.aspectj.lang.annotation.Around;
+import org.aspectj.lang.annotation.Aspect;
+import org.springframework.stereotype.Component;
+
+@Aspect
+@Component
+public class ExampleAspect {
+
+    @Around("@annotation(LogExecutionTime)")
+    public Object logExecutionTime(ProceedingJoinPoint joinPoint) throws Throwable {
+        final long start = System.currentTimeMillis();
+
+        final Object proceed = joinPoint.proceed();
+
+        final long executionTime = System.currentTimeMillis() - start;
+
+        System.out.println(joinPoint.getSignature() + " executed in " + executionTime + "ms");
+
+        return proceed;
+    }
+
+}

spring-custom-aop/src/main/java/org/baeldung/LogExecutionTime.java

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+package org.baeldung;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.METHOD)
+public @interface LogExecutionTime {
+}

spring-custom-aop/src/main/java/org/baeldung/Service.java

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+package org.baeldung;
+
+import org.springframework.stereotype.Component;
+
+@Component
+public class Service {
+
+    @LogExecutionTime
+    public void serve() throws InterruptedException {
+        Thread.sleep(2000);
+    }
+}

spring-custom-aop/src/test/java/org/baeldung/CustomAnnotationTest.java

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+package org.baeldung;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@SpringBootTest
+public class CustomAnnotationTest {
+
+    @Autowired
+    private Service service;
+
+    @Test
+    public void shouldApplyCustomAnnotation() throws InterruptedException {
+        service.serve();
+    }
+
+}