定制监控端点

• yml配置，方便查看

management:
    health:
      enabled: true
      show-details: always #总是显示详细信息。可显示每个模块的状态信息

• 定制 Health 信息

@Component
public class MyComHealthIndicator extends AbstractHealthIndicator {

    /**
     * 真实的检查方法
     * @param builder
     * @throws Exception
     */
    @Override
    protected void doHealthCheck(Health.Builder builder) throws Exception {
        //mongodb。  获取连接进行测试
        Map<String,Object> map = new HashMap<>();
        // 检查完成
        if(1 == 2){
//            builder.up(); //健康
            builder.status(Status.UP);
            map.put("count",1);
            map.put("ms",100);
        }else {
//            builder.down();
            builder.status(Status.OUT_OF_SERVICE);
            map.put("err","连接超时");
            map.put("ms",3000);
        }
        builder.withDetail("code",100)
                .withDetails(map);
    }

}

• 定制info信息

# 方式1：在yml中配置
info:
  appName: boot-admin
  version: 2.0.1
  mavenProjectName: @project.artifactId@  #使用@@可以获取maven的pom文件值
  mavenProjectVersion: @project.version@

# 方式2：编写InfoContributor
import java.util.Collections;
import org.springframework.boot.actuate.info.Info;
import org.springframework.boot.actuate.info.InfoContributor;
import org.springframework.stereotype.Component;

@Component
public class ExampleInfoContributor implements InfoContributor {

    @Override
    public void contribute(Info.Builder builder) {
        builder.withDetail("example",
                Collections.singletonMap("key", "value"));
    }

}

# 使用http方式查看，yml配置和实现类方式的内容都会显示
http://localhost:8080/actuator/info

• 定制Metrics信息

# 方式1
@Service
public class CityServiceImpl implements CityService {

    @Autowired
    CityMapper cityMapper;

    // 声明变量
    Counter counter;

    // 注入MeterRegistry，自定义一个指标的值cityService.saveCity.count
    public CityServiceImpl(MeterRegistry meterRegistry){
        counter = meterRegistry.counter("cityService.saveCity.count");
    }

    public City getById(Long id){
        return cityMapper.getById(id);
    }

    // 每次保存时，指标的值都添加1个
    public void saveCity(City city) {
        counter.increment();
        cityMapper.insert(city);
    }

}

# 方式2
@Bean
MeterBinder queueSize(Queue queue) {
    return (registry) -> Gauge.builder("queueSize", queue::size).register(registry);
}

• 自定义1个监控端点

@Component
@Endpoint(id = "container")
public class DockerEndpoint {


    @ReadOperation
    public Map getDockerInfo(){
        return Collections.singletonMap("info","docker started...");
    }

    @WriteOperation
    private void restartDocker(){
        System.out.println("docker restarted....");
    }

}