MetricsContextTimer (Context propagation 1.0.8 API)

java.lang.Object
- nl.talsmasoftware.context.metrics.MetricsContextTimer

All Implemented Interfaces:

ContextTimer
```
public class MetricsContextTimer
extends Object
implements ContextTimer
```
A ContextTimer implementation that locates an appropriate shared metric registry. Then it registers a new Timer for context switches and updates it.
Shared metric registry resolution

What an appropriate shared metric registry is, is rather complex and determined by the following rules:
1. First, if a contextpropagation.metrics.registry system property is defined, the shared metric registry by that name will be used for all context related timers.
2. Alternatively, the environment property CONTEXTPROPAGATION_METRICS_REGISTRY serves the same purpose if the system property is not defined.
3. Next, if there is a default shared metric registry, that one is used.
4. Otherwise:
  - If there is exactly one shared registry, that one is used instead of the default.
  - If there are no shared registries yet, a new one is created by the name "ContextPropagationMetrics".
  - Otherwise we cannot sensibly choose and try to register new timers to all shared registries.
Timers, once created, will not be retroactively registered to other shared registries.
Author:

Sjoerd Talsma

Constructor Summary

Constructors
Constructor Description

MetricsContextTimer()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`String`	`toString()`
`void`	`update(Class<?> type, String method, long duration, TimeUnit unit)`	Provides a new update for the context timer.

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

- Constructor Detail
  - MetricsContextTimer
```
public MetricsContextTimer()
```
- Method Detail
  - update
```
public void update(Class<?> type,
                   String method,
                   long duration,
                   TimeUnit unit)
```
    Description copied from interface: ContextTimer
    
    Provides a new update for the context timer.
    
    Specified by:
    
    update in interface ContextTimer
    
    Parameters:
    
    type - The class being called
    
    method - The method being called
    
    duration - The duration of the method
    
    unit - The unit of the duration
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object