Annotation Scope : Spring Aspect « Spring « Java Tutorial






File: context.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="
                http://www.springframework.org/schema/beans
                http://www.springframework.org/schema/beans/spring-beans.xsd
                http://www.springframework.org/schema/context
                http://www.springframework.org/schema/context/spring-context.xsd
                http://www.springframework.org/schema/aop
                http://www.springframework.org/schema/aop/spring-aop.xsd">

    <aop:aspectj-autoproxy />

    <context:component-scan base-package="bean">
        <context:include-filter type="annotation" expression="org.aspectj.lang.annotation.Aspect"/>
    </context:component-scan>


</beans>

File: Main.java

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import bean.Helper;
import bean.HelperDemo;

public class Main {
  public static void main(String[] args) throws Exception {
    ApplicationContext ac = new ClassPathXmlApplicationContext(
        "context.xml");
    HelperDemo hd1 = (HelperDemo) ac.getBean("helperDemo");
    hd1.someOperation();
    System.out.println(hd1);
    HelperDemo hd2 = (HelperDemo) ac.getBean("helperDemo");
    hd2.someOperation();
    System.out.println(hd2);
    Helper helper = (Helper) ac.getBean("helper");
    System.out.println(helper);
  }
}

File: Helper.java

package bean;

import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;

@Component("helper")
@Scope(BeanDefinition.SCOPE_PROTOTYPE)
public class Helper {
    private int count;

    public void work() {
        this.count++;
    }

    @Override
    public String toString() {
        final StringBuilder sb = new StringBuilder();
        sb.append("Helper");
        sb.append("{count=").append(count);
        sb.append('}');
        return sb.toString();
    }
}

File: HelperDemo.java

package bean;



import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;

@Component
@Scope(BeanDefinition.SCOPE_PROTOTYPE)
public class HelperDemo {
    @Autowired
    private Helper helper;

    public void setHelper(Helper helper) {
        this.helper = helper;
    }

    public void someOperation() {
        this.helper.work();
    }

    @Override
    public String toString() {
        final StringBuilder sb = new StringBuilder();
        sb.append("HelperDemo");
        sb.append("{helper=").append(helper);
        sb.append('}');
        return sb.toString();
    }
}
  Download:  Spring-AnnotationScope.zip( 4,452 k)








28.50.Spring Aspect
28.50.1.Spring Tracing Aspect
28.50.2.Spring Aspect Logging
28.50.3.AspectJ Expression Pointcut
28.50.4.AspectJ AutoProxy
28.50.5.Aspect Filter
28.50.6.Aspect Annotation Pointcut Around After
28.50.7.Aspect Annotation
28.50.8.AOP Annotation
28.50.9.Annotation Scope
28.50.10.Spring AOP Examples