export interface AlertId {
readonly value: string;
}
export type AlertType =
| 'connection_pool_high_utilization'
| 'slow_query_detected'
| 'high_cpu_usage'
| 'high_memory_usage'
| 'high_disk_usage'
| 'connection_timeout'
| 'query_timeout';
export type AlertSeverity = 'low' | 'medium' | 'high' | 'critical';
export type AlertStatus = 'active' | 'acknowledged' | 'resolved';
export class PerformanceAlert {
private _status: AlertStatus = 'active';
private _acknowledgedAt?: Date;
private _resolvedAt?: Date;
constructor(
private readonly _id: AlertId,
private readonly _type: AlertType,
private readonly _severity: AlertSeverity,
private readonly _message: string,
private readonly _details: Record<string, any>,
private readonly _createdAt: Date = new Date()
) {}
get id(): AlertId {
return this._id;
}
get type(): AlertType {
return this._type;
}
get severity(): AlertSeverity {
return this._severity;
}
get message(): string {
return this._message;
}
get details(): Record<string, any> {
return { ...this._details };
}
get createdAt(): Date {
return this._createdAt;
}
get status(): AlertStatus {
return this._status;
}
get acknowledgedAt(): Date | undefined {
return this._acknowledgedAt;
}
get resolvedAt(): Date | undefined {
return this._resolvedAt;
}
acknowledge(): void {
if (this._status === 'resolved') {
throw new Error('Cannot acknowledge a resolved alert');
}
this._status = 'acknowledged';
this._acknowledgedAt = new Date();
}
resolve(): void {
this._status = 'resolved';
this._resolvedAt = new Date();
}
isActive(): boolean {
return this._status === 'active';
}
isAcknowledged(): boolean {
return this._status === 'acknowledged';
}
isResolved(): boolean {
return this._status === 'resolved';
}
getDuration(): number {
const endTime = this._resolvedAt || new Date();
return endTime.getTime() - this._createdAt.getTime();
}
isCritical(): boolean {
return this._severity === 'critical';
}
shouldEscalate(thresholdMinutes: number = 30): boolean {
if (this._status !== 'active') return false;
const now = new Date();
const minutesSinceCreated = (now.getTime() - this._createdAt.getTime()) / (1000 * 60);
return minutesSinceCreated > thresholdMinutes;
}
}
