springboot actuator

1、通过http监控

        添加jar包

               <dependency>

                    <groupId>org.springframework.boot</groupId>

                    <artifactId>spring-boot-starter-actuator</artifactId>

              </dependency>

            <dependency>

                <groupId>org.springframework.hateoas</groupId>

                <artifactId>spring-hateoas</artifactId>

                <version>0.19.0.RELEASE</version>

            </dependency>

     启动项目 访问

          http://localhost:8180/actuator  --获取actuator提供的主要功能

{
    "links": [
        {
            "rel": "self",
            "href": "http://localhost:8180/actuator"
        },
        {
            "rel": "autoconfig",
            "href": "http://localhost:8180/autoconfig"
        },
        {
            "rel": "dump",
            "href": "http://localhost:8180/dump"
        },
        {
            "rel": "mappings",
            "href": "http://localhost:8180/mappings"
        },
        {
            "rel": "metrics",
            "href": "http://localhost:8180/metrics"
        },
        {
            "rel": "health",
            "href": "http://localhost:8180/health"
        },
        {
            "rel": "trace",
            "href": "http://localhost:8180/trace"
        },
        {
            "rel": "beans",
            "href": "http://localhost:8180/beans"
        },
        {
            "rel": "loggers",
            "href": "http://localhost:8180/loggers"
        },
        {
            "rel": "auditevents",
            "href": "http://localhost:8180/auditevents"
        },
        {
            "rel": "configprops",
            "href": "http://localhost:8180/configprops"
        },
        {
            "rel": "heapdump",
            "href": "http://localhost:8180/heapdump"
        },
        {
            "rel": "env",
            "href": "http://localhost:8180/env"
        },
        {
            "rel": "info",
            "href": "http://localhost:8180/info"
        }
    ]
}

   访问http://localhost:8180/autoconfig---查看自动配置的情况

          返回内容

   Whitelabel Error Page

     This application has no explicit mapping for /error, so you are seeing this as a fallback.

     Mon Apr 24 14:35:37 CST 2017

     There was an unexpected error (type=Unauthorized, status=401).

     Full authentication is required to access this resource.

        需要身份认证 application.properties中添加management.security.enabled=false 访问即可

2、原理了解

  从上图看出 映射主要由EndpointHandlerMapping完成

http://www.cnblogs.com/davidwang456/p/6678982.html---原理介绍

3、自定义端点

       定义业务类：

                  @Service
public class StatusService {
private String status;
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
}

     自定义端点：

      public class StatusEndPoint extends AbstractEndpoint<String> implements ApplicationContextAware{
ApplicationContext context;
public StatusEndPoint() {
super("ff");
}
@Override
public String invoke() {
StatusService bean = context.getBean(StatusService.class);
return "The current Status is:" + bean.getStatus(); 
}
@Override
public void setApplicationContext(ApplicationContext applicationContext)
throws BeansException {
this.context = applicationContext;
}
}

     注册端点

      @Bean
public Endpoint<String> status(){
Endpoint<String> status = new StatusEndPoint();
return status;
}

   应用端点：

     @Autowired
StatusService statusService;
@RequestMapping("/change")
public String changeStatus(String status){
statusService.setStatus(status);
return "ok";
}

         依次方位，即可看到效果

http://localhost:8081/ff ------http://localhost:8081/change?status=running ------ http://localhost:8081/ff