/**
* PerformanceAlertTriggeredEvent Domain Event
*
* Represents an event that occurs when a performance threshold has been exceeded.
* Contains information about the alert type, severity, and measurements.
*/
export class PerformanceAlertTriggeredEvent {
constructor(
readonly alertId: string,
readonly alertType: 'QUERY_PERFORMANCE' | 'CONNECTION_POOL' | 'SYSTEM_RESOURCES',
readonly severity: 'INFO' | 'WARNING' | 'CRITICAL',
readonly message: string,
readonly measurements: Record<string, number>,
readonly timestamp: Date = new Date()
) {}
/**
* Checks if the alert is critical.
* @returns boolean indicating if the alert is critical
*/
isCritical(): boolean {
return this.severity === 'CRITICAL';
}
/**
* Creates a summary of the performance alert event.
* @returns Summary string
*/
getSummary(): string {
return `[${this.severity}] ${this.alertType} alert: ${this.message}`;
}
/**
* Gets the recommended action based on the alert type and severity.
* @returns Recommendation string
*/
getRecommendation(): string {
switch (this.alertType) {
case 'QUERY_PERFORMANCE':
return this.isCritical()
? 'Review and optimize the slow queries immediately'
: 'Consider optimizing frequently executed queries';
case 'CONNECTION_POOL':
return this.isCritical()
? 'Increase connection pool size or reduce connection usage'
: 'Monitor connection pool usage trends';
case 'SYSTEM_RESOURCES':
return this.isCritical()
? 'Scale up resources or reduce system load immediately'
: 'Plan for resource allocation adjustment';
default:
return 'Review system performance metrics';
}
}
}
