MultiMetricRepository (Spring Boot API)

所有超级接口:
PrefixMetricReader, PrefixMetricWriter
所有已知实现类:
InMemoryMultiMetricRepository, RedisMultiMetricRepository
```
public interface MultiMetricRepository
extends PrefixMetricReader, PrefixMetricWriter
```
A repository for metrics that allows efficient storage and retrieval of groups of metrics with a common name prefix (their group name).

方法概要

所有方法实例方法抽象方法
修饰符和类型	方法	说明
`long`	`countGroups()`	The number of groups available in this repository.
`Iterable<String>`	`groups()`	The names of all the groups known to this repository.

从接口继承的方法 org.springframework.boot.actuate.metrics.reader.PrefixMetricReader
findAll

从接口继承的方法 org.springframework.boot.actuate.metrics.writer.PrefixMetricWriter
increment, reset, set

- 方法详细资料
  - groups
```
Iterable<String> groups()
```
    The names of all the groups known to this repository.
    返回:
    all available group names
  - countGroups
```
long countGroups()
```
    The number of groups available in this repository.
    返回:
    the number of groups