Enum SystemEvent 

pub enum SystemEvent {
    MetricsDropped {
        count: u64,
        reason: String,
    },
    StorageError {
        error: String,
        event_type: String,
    },
    WorkerStarted,
    WorkerStopped,
}

System-level events for operational metrics and monitoring.

These events track the health and operation of the metrics system itself, providing visibility into system behavior, errors, and resource management. They are primarily used for operational monitoring and debugging.

Use Cases

• Monitoring system health and stability
• Tracking metrics collection reliability
• Identifying storage or processing issues
• Understanding worker lifecycle

Variants

MetricsDropped

Emitted when metrics events are dropped due to errors or resource constraints.

This typically indicates system stress or configuration issues that should be investigated.

Fields

• count: Number of events that were dropped
• reason: Human-readable explanation of why events were dropped

Fields

count: u64

Number of events that were dropped

reason: String

Explanation of why the events were dropped

StorageError

Emitted when a storage operation fails.

Tracks errors in persisting metrics to the storage backend, helping identify database issues or data quality problems.

Fields

• error: Description of the storage error
• event_type: Type of event that failed to be stored

Fields

error: String

Description of the storage error that occurred

event_type: String

Type of metrics event that failed to be stored

WorkerStarted

Emitted when a metrics processing worker starts.

Indicates that a new worker thread/task has begun processing metrics events from the event queue.

WorkerStopped

Emitted when a metrics processing worker stops.

Indicates that a worker has shut down, either gracefully or due to an error. Used to track worker lifecycle and system capacity.

Trait Implementations

impl Clone for SystemEvent

fn clone(&self) -> SystemEvent

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for SystemEvent

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for SystemEvent

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for SystemEvent

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.