Module oc_stat_view
View allows users to aggregate the recorded Measurements.
Description
Views need to be passed to the subscribe function to be before data will be collected and sent to exporters.
Data Types
aggregation()
aggregation() = module()
aggregation_options()
aggregation_options() = any()
description()
description() = binary() | string()
measure_name()
measure_name() = atom() | binary() | string()
name()
name() = atom() | binary() | string()
view()
view() = #view{name = name() | _, measure = measure_name() | _, subscribed = boolean(), description = description() | _, ctags = oc_tags:tags() | _, tags = [oc_tags:key()] | _, aggregation = aggregation() | _, aggregation_options = aggregation_options() | _}
view_data()
view_data() = #{name => name(), description => description(), ctags => oc_tags:tags(), tags => [oc_tags:key()], data => oc_stat_aggregation:data()}
Function Index
| deregister/1 | Deregisters the view. |
| export/1 | Returns a snapshot of the View's data. |
| is_registered/1 | Returns true if the view is registered. |
| is_subscribed/1 | Returns true if the view is exporting data by subscription. |
| new/1 | Creates a View from a map. |
| new/5 | Creates a View. |
| register/1 | Registers the view. |
| register/5 | Registers the view created from arguments. |
| subscribe/1 | Subscribe the View, When subscribed, a view can aggregate measure data and export it. |
| subscribe/5 | A shortcut: Creates, Registers, and Subscribes a view in one call. |
| unsubscribe/1 | Unsubscribes the View. |
Function Details
deregister/1
deregister(View::name() | view()) -> ok
Deregisters the view. If subscribed, unsubscribes and therefore existing aggregation data cleared.
Returns {error, {unknown_view, Name}} if the view is unknown.
export/1
export(View::view()) -> view_data()
Returns a snapshot of the View's data.
is_registered/1
is_registered(View::name() | view()) -> boolean()
Returns true if the view is registered.
is_subscribed/1
is_subscribed(View::name() | view()) -> boolean()
Returns true if the view is exporting data by subscription.
new/1
new(Map) -> any()
Creates a View from a map.
new/5
new(Name, Measure, Description, Tags, Aggregation) -> any()
Creates a View. This view needs to be registered and subscribed to a measure in order to start aggregating data.
register/1
register(View::view()) -> {ok, view()} | {error, any()}
Registers the view. Aggregation initialized with AggregationOptions.
Returns {error, {unknown_measure, Measure}} if Measure is unknown.
Returns {error, {view_already_exists, Name}} if a view with Name already registered.
register/5
register(Name, Measure, Description, Tags, Aggregation) -> any()
Registers the view created from arguments.
Returns {error, {unknown_measure, Measure}} if Measure is unknown.
Returns {error, {view_already_exists, Name}} if a view with Name already registered.
subscribe/1
subscribe(Map::name() | view() | map()) -> {ok, view()} | {error, any()}
Subscribe the View, When subscribed, a view can aggregate measure data and export it.
Returns {error, {unknown_view, Name}} if Name view is unknown.
subscribe/5
subscribe(Name, Measure, Description, Tags, Aggregation) -> any()
A shortcut: Creates, Registers, and Subscribes a view in one call.
Returns {error, {unknown_measure, Measure}} if Measure is unknown.
unsubscribe/1
unsubscribe(View::name() | view()) -> ok
Unsubscribes the View. When unsubscribed a view no longer aggregates measure data and exports it. Also all existing aggregation data cleared.
Returns {error, {unknown_view, Name}} if Name view is unknown.