@dollhousemcp/mcp-server/dist/metrics/collectors/OperationMetricsCollector.js

DollhouseMCP - A Model Context Protocol (MCP) server that enables dynamic AI persona management from markdown files, allowing Claude and other compatible AI assistants to activate and switch between different behavioral personas.

import { OperationMetricsTracker } from '../OperationMetricsTracker.js';
export class OperationMetricsCollector {
    tracker;
    name = 'operation-metrics';
    description = 'MCP-AQL operation counts, durations, and endpoint breakdown.';
    constructor(tracker) {
        this.tracker = tracker;
    }
    collect() {
        try {
            const m = this.tracker.getMetrics();
            const pct = OperationMetricsTracker.percentiles(m.durations);
            const entries = [
                {
                    type: 'counter',
                    name: 'mcpaql.operations_total',
                    source: 'OperationMetricsTracker',
                    unit: 'operations',
                    description: 'Total MCP-AQL operations executed.',
                    value: m.totalOps,
                },
                {
                    type: 'counter',
                    name: 'mcpaql.operations_failed_total',
                    source: 'OperationMetricsTracker',
                    unit: 'operations',
                    description: 'Total MCP-AQL operations that failed.',
                    value: m.failedOps,
                },
                {
                    type: 'histogram',
                    name: 'mcpaql.duration',
                    source: 'OperationMetricsTracker',
                    unit: 'milliseconds',
                    description: 'MCP-AQL operation duration distribution.',
                    value: {
                        count: pct.count,
                        sum: pct.sum,
                        avg: pct.avg,
                        p50: pct.p50,
                        p95: pct.p95,
                        p99: pct.p99,
                    },
                },
            ];
            // Per-endpoint gauges
            for (const [endpoint, count] of m.byEndpoint) {
                entries.push({
                    type: 'gauge',
                    name: 'mcpaql.by_endpoint',
                    source: 'OperationMetricsTracker',
                    unit: 'operations',
                    description: `Operations via ${endpoint} endpoint.`,
                    labels: { endpoint },
                    value: count,
                });
            }
            // Top 10 operations by count
            const topOps = [...m.byOperation.entries()]
                .sort((a, b) => b[1] - a[1])
                .slice(0, 10);
            for (const [operation, count] of topOps) {
                entries.push({
                    type: 'gauge',
                    name: 'mcpaql.by_operation',
                    source: 'OperationMetricsTracker',
                    unit: 'operations',
                    description: `Count for operation: ${operation}.`,
                    labels: { operation },
                    value: count,
                });
            }
            return entries;
        }
        catch {
            return [];
        }
    }
}
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