MetricReader (Spring Boot API)

All Known Subinterfaces:
MetricRepository
All Known Implementing Classes:
AggregateMetricReader, BufferMetricReader, CompositeMetricReader, InMemoryMetricRepository, MetricRegistryMetricReader, MetricsEndpointMetricReader, RedisMetricRepository, SpringIntegrationMetricReader
```
public interface MetricReader
```
A simple reader interface used to interrogate Metrics.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`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).

- Method Detail
  - findOne
```
Metric<?> findOne(String metricName)
```
    Find an instance of the metric with the given name (usually the latest recorded value).
    Parameters:
    metricName - the name of the metric to find
    Returns:
    a metric value or null if there are none with that name
  - findAll
```
Iterable<Metric<?>> findAll()
```
    Find all the metrics known to this reader.
    Returns:
    all instances of metrics known to this reader
  - count
```
long count()
```
    The number of metrics known to this reader.
    Returns:
    the number of metrics