EMFMetricFormatter

java.lang.Object
- com.amazonaws.xray.metrics.EMFMetricFormatter

All Implemented Interfaces:

MetricFormatter
```
public class EMFMetricFormatter
extends java.lang.Object
implements MetricFormatter
```
Creates metrics based on a Segment.
These metrics are published to CloudWatch via a structured log through CloudWatch Logs. These logs are created in the ServiceMetricsSDK log group.

In addition to the metrics describe below these logs contain properties to enable correlation with Traces.
- Timestamp: The end time of the segment, used for the timestamp of the generated metric.
- TraceId: The Trace ID
Metrics are published to the ServiceMetrics/SDK namespace with dimensions:
- ServiceType: The Segment Origin
- ServiceName: The Segment Name
The following metrics will be reported:
- Latency: The difference between Start and End time in milliseconds
- ErrorRate: 1 if the segment is marked as an error, zero otherwise.
- FaultRate: 1 if the segment is marked as an fault, zero otherwise.
- ThrottleRate: 1 if the segment is marked as throttled, zero otherwise.
- OkRate: 1 if no other statuses are set, zero otherwise.
Rate metrics above may be used with the CloudWatch AVG statistic to get a percentage of requests in a category or may be used as a SUM. COUNT of Latency represents the total count of invocations of this segment.

- Constructor Summary
  
  Constructors
  Constructor Description
  
  EMFMetricFormatter()
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  java.lang.String formatSegment(Segment segment)
  Converts a segment into a metric string.
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - EMFMetricFormatter
```
public EMFMetricFormatter()
```
- Method Detail
  - formatSegment
```
public java.lang.String formatSegment(Segment segment)
```
    Description copied from interface: MetricFormatter
    
    Converts a segment into a metric string.
    
    Specified by:
    
    formatSegment in interface MetricFormatter
    
    Parameters:
    
    segment - Segment to format into metrics
    
    Returns:
    
    a string representation of the Segment