在Grails中使用AOP不适用于服务 [英] Using AOP in Grails is not working for service
问题描述
我使用Grails 2.2.3,并在grails-app / conf / spring / resources.groovy中输入以下代码:
beans = {
xmlns aop:http://www.springframework.org/schema/aop
loggerAspect(com.test.aop.aspect.LoggerAspect)
aop {
config(proxy-target-class:true){
aspect(id:beforeService,ref:loggerAspect){
在方法之前:beforeMethod,
pointcut:执行(* com.test.DemoService.serviceMethod())
}
aspect(id:afterService,ref:loggerAspect){
after method:afterMethod,
pointcut:execution(* com.test.DemoService.serviceMethod())
}
}
}
}
然后,在src / groovy / com / test / aop / aspect下创建一个方面类
package com.test.aop.aspect
class LoggerAspect {
def beforeMethod(JoinPoi nt jp){
println' - Before Method。'
}
def afterMethod(JoinPoint jp){
println' - After Method。'
在grails-app / services / com下创建一个服务类/ test
package com.test $ b $ class DemoService {
def serviceMethod(){
println'在DemoService.serviceMethod()'
}
}
并创建一个控制器来调用服务进行测试
package com.test $ b $ class DemoController {
def index() {
println'DemoController.index()'
def demoService = new DemoService()
demoService.serviceMethod()
'Hello World'
}
}
最后,我通过url测试aop:
http:// myhost:8080 / grails-spring-aop / demo / index
并且aop不被调用。以下是结果:
|服务器运行。浏览到http:// myhost:8080 / grails-spring-aop /
在DemoController.index()
中DemoService.serviceMethod()
我将以下行添加到服务类:
static transactional = false
而且,它仍然不适合我。
任何人都知道如何解决这个问题,或者这是不可能的。
或者我做错了什么。
谢谢。
您需要在控制器中注入服务(spring bean),而不是创建它的一个实例。
package com .test
class DemoController {
def demoService // Autowired,不需要在resources.groovy中指定
$ b def index(){
println'在DemoController.index ()'
demoService.serviceMethod()
render'Hello World'
}
}
此外,可以根据以下方面进行注释:
包com.test.aop.aspect
@Aspect
类LoggerAspect {
//更通用的建议如下
// @ Before(execution(* com.test。*。*(..)))
@Before(com.test.DemoService.serviceMethod())
def beforeMethod(){
println' - Before Method。'
}
//更通用的建议如下
// @ Around(execution(* com.test。*。*(..)))
@After( com.test.DemoService.serviceMethod())
def afterMethod(){
println' - After Method。'
}
}
而resources.groovy可能变成:
beans = {
loggerAspect(com.test.aop.aspect.LoggerAspect)
xmlns aop:http://www.springframework.org/schema/aop
aop {
config(proxy-target-class:true){
aspect(id:loggerAspectService,ref:loggerAspect)
}
}
}
I use Grails 2.2.3 and type following codes in grails-app/conf/spring/resources.groovy
beans = {
xmlns aop:"http://www.springframework.org/schema/aop"
loggerAspect(com.test.aop.aspect.LoggerAspect)
aop{
config("proxy-target-class": true) {
aspect(id: "beforeService", ref: "loggerAspect") {
before method: "beforeMethod",
pointcut: "execution(* com.test.DemoService.serviceMethod())"
}
aspect(id: "afterService", ref: "loggerAspect") {
after method: "afterMethod",
pointcut: "execution(* com.test.DemoService.serviceMethod())"
}
}
}
}
then, create an aspect class under src/groovy/com/test/aop/aspect
package com.test.aop.aspect
class LoggerAspect {
def beforeMethod(JoinPoint jp){
println '-- Before Method.'
}
def afterMethod(JoinPoint jp){
println '-- After Method.'
}
}
And create a service class under grails-app/services/com/test
package com.test
class DemoService {
def serviceMethod() {
println 'In DemoService.serviceMethod()'
}
}
And create a controller to call service for testing
package com.test
class DemoController {
def index() {
println 'In DemoController.index()'
def demoService = new DemoService()
demoService.serviceMethod()
render 'Hello World'
}
}
Finally, I test the aop through url:
http://myhost:8080/grails-spring-aop/demo/index
and the aop is not invoked. Following is the result:
| Server running. Browse to http://myhost:8080/grails-spring-aop/
In DemoController.index()
In DemoService.serviceMethod()
I add the following line to the service class:
static transactional = false
And, it's still not working for me.
Anyone an idea how this can be solved or is this not possible. Or I do the something wrong.
Thanks.
You need to inject the service (spring bean) in the controller instead of creating an instance of it.
package com.test
class DemoController {
def demoService //Autowired, not required to specify in resources.groovy
def index() {
println 'In DemoController.index()'
demoService.serviceMethod()
render 'Hello World'
}
}
Moreover, the aspect can be made annotation based as below:
package com.test.aop.aspect
@Aspect
class LoggerAspect {
//A more generic advice would be as below
//@Before("execution(* com.test.*.*(..))")
@Before("com.test.DemoService.serviceMethod()")
def beforeMethod(){
println '-- Before Method.'
}
//A more generic advice would be as below
//@Around("execution(* com.test.*.*(..))")
@After("com.test.DemoService.serviceMethod()")
def afterMethod(){
println '-- After Method.'
}
}
And resources.groovy could become:
beans = {
loggerAspect(com.test.aop.aspect.LoggerAspect)
xmlns aop:"http://www.springframework.org/schema/aop"
aop{
config("proxy-target-class": true) {
aspect(id: "loggerAspectService", ref: "loggerAspect")
}
}
}
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