我已经实现了Spring启动aop演示并运行良好,但是当我想在项目启动时使用它来加载某些资源时,它不会以某种方式运行项目启动时Spring aop不运行
Aop的:
package com.neo.mysql;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;
import java.lang.reflect.Method;
/**
* Created by li_weia on 2017/7/6.
*/
@Aspect
@Component
public class DynamicDataSourceAspect {
@Before("@annotation(VendorSource)")
public void beforeSwitchDS(JoinPoint point){
//获得当前访问的class
Class<?> className = point.getTarget().getClass();
//获得访问的方法名
String methodName = point.getSignature().getName();
//得到方法的参数的类型
Class[] argClass = ((MethodSignature)point.getSignature()).getParameterTypes();
String dataSource = DataSourceContextHolder.DEFAULT_DS;
try {
// 得到访问的方法对象
Method method = className.getMethod(methodName, argClass);
// 判断是否存在@DS注解
if (method.isAnnotationPresent(VendorSource.class)) {
VendorSource annotation = method.getAnnotation(VendorSource.class);
// 取出注解中的数据源名
dataSource = annotation.value();
}
} catch (Exception e) {
e.printStackTrace();
}
// 切换数据源
DataSourceContextHolder.setDB(dataSource);
}
@After("@annotation(VendorSource)")
public void afterSwitchDS(JoinPoint point){
DataSourceContextHolder.clearDB();
}
}
的VendorSource注释:
package com.neo.mysql;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* Created by li_weia on 2017/7/6.
*/
@Target({ ElementType.METHOD, ElementType.TYPE })
@Retention(RetentionPolicy.RUNTIME)
public @interface VendorSource {
String value() default "vendor-master";
}
它运行良好这里,我可以成功地标注更改数据源:
package com.neo.web;
import com.neo.entity.SiteEntity;
import com.neo.mapper.ClassMappingDao;
import com.neo.mysql.VendorSource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;
@RestController
public class UserController {
private final ClassMappingDao siteMapper;
@Autowired(required = false)
public UserController(ClassMappingDao siteMapper) {
this.siteMapper = siteMapper;
}
@RequestMapping("/getSites")
@VendorSource("vendor-read")
public List<SiteEntity> getUsers() {
return siteMapper.getAllSite();
}
}
,但它并不在这里工作,AOP的方法不是在所有调用:
package com.neo.component;
import com.neo.entity.SiteEntity;
import com.neo.mapper.ClassMappingDao;
import com.neo.mysql.VendorSource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import java.util.List;
/**
* Created by li_weia on 2017/7/7.
*/
@Component
public class TestComponent{
private final ClassMappingDao userMapper;
@Autowired(required = false)
public TestComponent(ClassMappingDao userMapper) {
this.userMapper = userMapper;
init();
}
@VendorSource("vendor-read")
public void init() {
List<SiteEntity> sites = userMapper.getAllSite();
for(SiteEntity site: sites){
System.out.println(site.getSite());
}
}
}
TestComponent可以成功初始化,它似乎使用默认的数据源,并且注释根本不起作用 – Levy
您是如何启用AOP的? –
带有方面和组件注释,弹簧引导将自动启用它 – Levy