CronScheduledTrigger class Null safety

A trigger that resume and pause sampling based on a cron job specification.

Bases on the cron package.



CronScheduledTrigger({int? minute, int? hour, int? day, int? month, int? weekday, Duration duration = const Duration(seconds: 1)})
Create a cron scheduled trigger based on specifying: [...]
CronScheduledTrigger.fromJson(Map<String, dynamic> json)
CronScheduledTrigger.parse({required String cronExpression, Duration duration = const Duration(seconds: 1)})
Create a trigger based on a cron-formatted string expression. [...]


$type String?
The runtime class name (type) of this object. Used for deserialization from JSON objects.
read / write, inherited
cronExpression String
The cron job expression.
read / write
duration Duration
The duration (until stopped) of the the sampling. If null, the sampling is never stopped (i.e., runs forever).
read / write
fromJsonFunction Function
The function which can convert a JSON string to an object of this type.
read-only, override
hashCode int
The hash code for this object. [...]
read-only, inherited
jsonType String
Return the $type to be used for JSON serialization of this class. Default is runtimeType. Only specify this if you need another type.
read-only, inherited
requiresMasterDevice bool?
Determines whether the trigger needs to be evaluated on a master device (MasterDeviceDescriptor). For example, this is the case when the trigger is time bound and needs to be evaluated by a task scheduler running on a master device.
@JsonKey(ignore: true), read / write, inherited
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited
sourceDeviceRoleName String?
The device role name from which the trigger originates.
read / write, inherited


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


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