NodeHeartbeat class final
Node → Hub: periodic liveness signal with a monotonic sequence number.
- Inheritance
-
- Object
- ControlMessage
- NodeHeartbeat
Constructors
- NodeHeartbeat({required String nodeId, required int activeSessions, required int seq, required DateTime ts})
-
Creates a heartbeat.
const
Properties
- activeSessions → int
-
Number of sessions currently active on the node.
final
- channelId → int?
-
The channel this message pertains to, or
nullfor connection-level messages (the envelopecfield).no setterinherited - hashCode → int
-
The hash code for this object.
no setterinherited
- nodeId → String
-
The reporting node id.
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- seq → int
-
Strictly-increasing sequence number (replay/stall detection).
final
- ts → DateTime
-
When the heartbeat was produced.
final
- type → String
-
The stable type discriminator (the envelope
tfield).no setteroverride
Methods
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toJson(
) → Map< String, dynamic> -
The message payload (the envelope
dfield), without the type or channel.override -
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited
Static Methods
-
fromJson(
int? channel, Map< String, dynamic> d) → NodeHeartbeat - Decodes a NodeHeartbeat.