java.lang.Object
- org.springframework.boot.actuate.metrics.aggregate.AggregateMetricReader

所有已实现的接口:
MetricReader
```
public class AggregateMetricReader
extends Object
implements MetricReader
```
A metric reader that aggregates values from a source reader, normally one that has been collecting data from many sources in the same form (like a scaled-out application). The source has metrics with names in the form *.*.counter.** and *.*.[anything].**, and the result has metric names in the form aggregate.count.** and aggregate.[anything].**. Counters are summed and anything else (i.e. gauges) are aggregated by choosing the most recent value.
从以下版本开始:
1.3.0

构造器概要
构造器
构造器说明
AggregateMetricReader(MetricReader source)

方法概要

所有方法实例方法具体方法
修饰符和类型	方法	说明
`long`	`count()`	The number of metrics known to this reader.
`Iterable<Metric<?>>`	`findAll()`	Find all the metrics known to this reader.
`Metric<?>`	`findOne(String metricName)`	Find an instance of the metric with the given name (usually the latest recorded value).
`void`	`setKeyPattern(String keyPattern)`	Pattern that tells the aggregator what to do with the keys from the source repository.
`void`	`setPrefix(String prefix)`	Prefix to apply to all output metrics.

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 构造器详细资料
  - AggregateMetricReader
```
public AggregateMetricReader(MetricReader source)
```
- 方法详细资料
  - setKeyPattern
```
public void setKeyPattern(String keyPattern)
```
    Pattern that tells the aggregator what to do with the keys from the source repository. The keys in the source repository are assumed to be period separated, and the pattern is in the same format, e.g. "d.d.k.d". The pattern segments are matched against the source keys and a rule is applied:
    "d" means "discard" this key segment (useful for global prefixes like system identifiers, or aggregate keys a.k.a. physical identifiers)
    "k" means "keep" it with no change (useful for logical identifiers like app names)
    Default is "d.d" (we assume there is a global prefix of length 2).
    参数:
    keyPattern - the keyPattern to set
  - setPrefix
```
public void setPrefix(String prefix)
```
    Prefix to apply to all output metrics. A period will be appended if not present in the provided value.
    参数:
    prefix - the prefix to use (default "aggregator.")
  - findOne
```
public Metric<?> findOne(String metricName)
```
    从接口复制的说明: MetricReader
    Find an instance of the metric with the given name (usually the latest recorded value).
    指定者:
    findOne 在接口中 MetricReader
    参数:
    metricName - the name of the metric to find
    返回:
    a metric value or null if there are none with that name
  - findAll
```
public Iterable<Metric<?>> findAll()
```
    从接口复制的说明: MetricReader
    Find all the metrics known to this reader.
    指定者:
    findAll 在接口中 MetricReader
    返回:
    all instances of metrics known to this reader
  - count
```
public long count()
```
    从接口复制的说明: MetricReader
    The number of metrics known to this reader.
    指定者:
    count 在接口中 MetricReader
    返回:
    the number of metrics

类 AggregateMetricReader

构造器概要

方法概要

从类继承的方法 java.lang.Object

构造器详细资料

AggregateMetricReader

方法详细资料

setKeyPattern

setPrefix

findOne

findAll

count