ServiceLevelIndicator class

A Service-Level Indicator (SLI) describes the "performance" of a service. For some services, the SLI is well-defined. In such cases, the SLI can be described easily by referencing the well-known SLI and providing the needed parameters. Alternatively, a "custom" SLI can be defined with a query to the underlying metric store. An SLI is defined to be good_service / total_service over any queried time interval. The value of performance always falls into the range 0 <= performance <= 1. A custom SLI describes how to compute this ratio, whether this is by dividing values from a pair of time series, cutting a Distribution into good and bad counts, or counting time windows in which the service complies with a criterion. For separation of concerns, a single Service-Level Indicator measures performance for only one aspect of service quality, such as fraction of successful queries or fast-enough queries.

Constructors

ServiceLevelIndicator()
ServiceLevelIndicator.fromJson(Map _json)

Properties

basicSli BasicSli
Basic SLI on a well-known service type.
read / write
hashCode int
The hash code for this object. [...]
read-only, inherited
requestBased RequestBasedSli
Request-based SLIs
read / write
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited
windowsBased WindowsBasedSli
Windows-based SLIs
read / write

Methods

noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
inherited
toJson() Map<String, Object>
toString() String
Returns a string representation of this object.
inherited

Operators

operator ==(Object other) bool
The equality operator. [...]
inherited