MessageChannelMetricWriter (Spring Boot API)

java.lang.Object
- org.springframework.boot.actuate.metrics.writer.MessageChannelMetricWriter

All Implemented Interfaces:
CounterWriter, GaugeWriter, MetricWriter
```
public class MessageChannelMetricWriter
extends Object
implements MetricWriter
```
A MetricWriter that publishes the metric updates on a MessageChannel. The messages have the writer input (Delta or Metric) as payload, and carry an additional header "metricName" with the name of the metric in it.
See Also:
MetricWriterMessageHandler

Constructor Summary
Constructors
Constructor Description
MessageChannelMetricWriter(org.springframework.messaging.MessageChannel channel)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`increment(Delta<?> delta)`	Increment the value of a metric (or decrement if the delta is negative).
`void`	`reset(String metricName)`	Reset the value of a metric, usually to zero value.
`void`	`set(Metric<?> value)`	Set the value of a metric.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - MessageChannelMetricWriter
```
public MessageChannelMetricWriter(org.springframework.messaging.MessageChannel channel)
```
- Method Detail
  - increment
```
public void increment(Delta<?> delta)
```
    Description copied from interface: CounterWriter
    Increment the value of a metric (or decrement if the delta is negative). The name of the delta is the name of the metric to increment.
    Specified by:
    increment in interface CounterWriter
    Parameters:
    delta - the amount to increment by
  - set
```
public void set(Metric<?> value)
```
    Description copied from interface: GaugeWriter
    Set the value of a metric.
    Specified by:
    set in interface GaugeWriter
    Parameters:
    value - the value
  - reset
```
public void reset(String metricName)
```
    Description copied from interface: CounterWriter
    Reset the value of a metric, usually to zero value. Implementations can discard the old values if desired, but may choose not to. This operation is optional (some implementations may not be able to fulfill the contract, in which case they should simply do nothing).
    Specified by:
    reset in interface CounterWriter
    Parameters:
    metricName - the name to reset