@SentinelRestTemplate won't add interceptor when RestTemplate annotated by @Bean annotation and construct in @Configuration class

[jsjchai]

RestTemplate配置

调用接口（"http://test-provider/test"是一个不存在的地址）

debug 后发现restTemplate对象中没有SentinelProtectInterceptor过滤器

spring cloud aliliba version 0.2.1.RELEASE
spring cloud version Finchley.RELEASE

[fangjian0423]

Hi, which spring boot version are you using?

Spring Cloud Finchley is compatibility with 2.0.X

[zhendong590]

please show flowrule.json's content

[jsjchai]

compatibility

spring boot version 2.0.6.RELEASE

[jsjchai]

how flowrule.json's content

没有配置限流规则，配置了一个不存在url

[zhendong590]

how flowrule.json's content

没有配置限流规则，配置了一个不存在url

You can have a try

step1: add sentinel settings in application.properties

spring.cloud.sentinel.datasource.ds1.file.file=classpath: flowrule.json
spring.cloud.sentinel.datasource.ds1.file.data-type=json
spring.cloud.sentinel.datasource.ds1.file.rule-type=flow

step 2: add flowrule.json

[
 {
    "resource": "http://test-provider/test",
    "controlBehavior": 0,
    "count": 0,
    "grade": 1,
    "limitApp": "default",
    "strategy": 0
  }
]

step3: restart application
step4:curl localhost:{server.port}/testException

[fangjian0423]

Hi @jsjchai .

Maybe you can see this example: https://github.com/spring-cloud-incubator/spring-cloud-alibaba/tree/master/spring-cloud-alibaba-examples/sentinel-example/sentinel-core-example

restTemplate have SentinelProtectInterceptor, you can try to debug to verify it.

I think maybe you write wrong logic somewhere.

[jsjchai]

flowrule.json的内容如何

没有配置限流规则，配置了一个不存在的URL

你可以尝试一下

步骤1：在application.properties中添加sentinel设置

spring.cloud.sentinel.datasource.ds1.file.file = classpath：flowrule.json
 spring.cloud.sentinel.datasource.ds1.file.data-type = json
 spring.cloud.sentinel.datasource.ds1.file.rule- type = flow

第2步：添加flowrule.json

[
 {
    “ resource ”： “ http：// test-provider / test ”，
     “ controlBehavior ”： 0，
     “ count ”： 0，
     “ grade ”： 1，
     “ limitApp ”： “ default ”，
     “ strategy ”： 0
  }
]

step3：重启应用程序
step4：curl localhost：{server.port} / testException

应该不是这个问题，启动时候没有加载到SentinelProtectInterceptor
https://github.com/spring-cloud-incubator/spring-cloud-alibaba/wiki/Sentinel#resttemplate-%E6%94%AF%E6%8C%81

[jsjchai]

Hi @jsjchai .

Maybe you can see this example: https://github.com/spring-cloud-incubator/spring-cloud-alibaba/tree/master/spring-cloud-alibaba-examples/sentinel-example/sentinel-core-example

restTemplate have SentinelProtectInterceptor, you can try to debug to verify it.

I think maybe you write wrong logic somewhere.

官方源码中的例子我运行成功了，自己写的demo没有加载到SentinelProtectInterceptor，这个过滤器是什么时候加载的

[fangjian0423]

@jsjchai SentinelBeanPostProcessor, you can try to debug in it.

[jsjchai]

SentinelBeanPostProcessor

我获取到的beanDefinition.getSource()是 org.springframework.core.type.classreading.MethodMetadataReadingVisitor
不懂spring源码，求大佬解释一下我拿到为什么是MethodMetadataReadingVisitor，而不是StandardMethodMetadata

[jsjchai]

我在类上面添加了@configuration这个注解， 注入 的restTemplate 自动转化成 MethodMetadataReadingVisitor而不是StandardMethodMetadata，放到@SpringBootApplication这个注解下注入就是StandardMethodMetadata

[fangjian0423]

Hi @jsjchai .

You can define it in a class annotated by @SpringBootApplication.

I will see why it happened and fix it next version.

[fangjian0423]

我在类上面添加了@configuration这个注解， 注入 的restTemplate 自动转化成 MethodMetadataReadingVisitor而不是StandardMethodMetadata，放到@SpringBootApplication这个注解下注入就是StandardMethodMetadata

A bean annotated by @SpringBootApplication scan by AnnotatedBeanDefinitionReader.

AnnotatedBeanDefinitionReader build AnnotatedGenericBeanDefinition when register bean.

AnnotatedGenericBeanDefinition using StandardAnnotationMetadata to assign to its property metadata in constructor.

This is an entrance bean of Spring Boot Application.

A bean annotated by @Configuration will register in ConfigurationClassParser and this parser will using ClassPathBeanDefinitionScanner to scan components with @ComponentScans or @ComponentScan annotation.

Spring using SimpleMetadataReader to get annotationMetadata in ClassPathBeanDefinitionScanner#doScan. This annotationMetadata is AnnotationMetadataReadingVisitor.

SimpleMetadataReader is MetadataReader implementation based on an ASM org.springframework.asm.ClassReader.