nyuchimzizi
Mzizi — an open-architecture project of the Bundu Foundation, operated and developed by Nyuchi. Built on the Five African Minerals palette.
Built by Nyuchi Africav4.0.39
Self-monitoring, self-healing resilience node that wires observability, circuit-breaker, bulkhead, rate-limiter, retry, timeout, fallback-chain, and chaos testing into a single composition for brand components. Implements all 7 Resilience4j patterns (Netflix Hystrix successor): CircuitBreaker, Retry, RateLimiter, Bulkhead, TimeLimiter, FallbackChain, and ChaosInjection. Exports NyuchiSection (wraps any UI section with error boundary + skeleton + observability + health tracking), useResilientFetch (data fetching with full resilience stack), NyuchiHealthMonitor (singleton aggregating health across all sections), NyuchiHealthPanel (admin health visualization), and the withResilience decorator that composes all patterns in the correct order. Every brand component renders inside a NyuchiSection so the infrastructure permanently monitors itself. Target: Rust compiled to WebAssembly. wasm-bindgen exposes the interface to SvelteKit. One Rust codebase compiles to both WASM (browser) and native binary (server).
View the full component source code below.
"use client"
import * as React from "react"
import { cn } from "@/lib/utils"
/* ═══════════════════════════════════════════════════════════════
NYUCHI RESILIENCE — Self-Monitoring Infrastructure
The principle: infrastructure monitors itself. When something
breaks, the system degrades gracefully, logs the failure,
tracks the pattern, and self-heals when the issue resolves.
EVERY brand component renders inside a NyuchiSection. This is
non-negotiable. The section boundary provides:
1. ERROR ISOLATION — React error boundary catches render crashes.
The section shows a fallback; the rest of the page survives.
2. LOADING ORCHESTRATION — Section manages its own loading state
with the branded skeleton, using lazy-section's FIFO queue so
sections mount one at a time (TikTok-style).
3. OBSERVABILITY — Every render, error, and recovery is logged
via structured observability. Section name, error type, stack
trace, recovery attempts — all captured automatically.
4. HEALTH TRACKING — Each section reports its health status
(healthy/degraded/error) to the NyuchiHealthMonitor singleton.
The monitor aggregates across all sections and can report to
system.service_health in nyuchi_platform_db.
5. CIRCUIT BREAKING — When a section's data source fails
repeatedly, the circuit breaker prevents hammering a dead
service. The section shows cached/fallback data instead.
6. SELF-HEALING — When the circuit breaker transitions from
OPEN to HALF_OPEN, it sends a probe request. If the probe
succeeds, the circuit closes and the section automatically
re-renders with fresh data. No user action needed.
This is what separates a component library from production
infrastructure. Components don't just render — they participate
in the observability and resilience system automatically.
═══════════════════════════════════════════════════════════════ */
// ─── HEALTH STATUS TYPES ───────────────────────────────────
export type SectionHealth = "healthy" | "degraded" | "error" | "loading"
export interface SectionHealthReport {
sectionName: string
status: SectionHealth
lastError?: Error
errorCount: number
lastRecovery?: Date
renderCount: number
avgRenderMs: number
dataSource?: "local" | "edge" | "cloud" | "cache" | "none"
circuitState?: "closed" | "open" | "half_open"
timestamp: Date
}
// ─── HEALTH MONITOR SINGLETON ──────────────────────────────
// Aggregates health from all NyuchiSections on the page.
// This is the central nervous system of the UI.
class HealthMonitor {
private sections = new Map<string, SectionHealthReport>()
private listeners = new Set<(reports: Map<string, SectionHealthReport>) => void>()
/** Report health status from a section */
report(sectionName: string, report: Partial<SectionHealthReport>) {
const existing = this.sections.get(sectionName) || {
sectionName,
status: "loading" as SectionHealth,
errorCount: 0,
renderCount: 0,
avgRenderMs: 0,
timestamp: new Date(),
}
const updated: SectionHealthReport = {
...existing,
...report,
sectionName,
timestamp: new Date(),
}
this.sections.set(sectionName, updated)
this.notifyListeners()
}
/** Get health report for all sections */
getAll(): Map<string, SectionHealthReport> {
return new Map(this.sections)
}
/** Get overall system health */
getSystemHealth(): SectionHealth {
const reports = Array.from(this.sections.values())
if (reports.length === 0) return "loading"
if (reports.some(r => r.status === "error")) return "error"
if (reports.some(r => r.status === "degraded")) return "degraded"
if (reports.some(r => r.status === "loading")) return "loading"
return "healthy"
}
/** Subscribe to health changes */
subscribe(listener: (reports: Map<string, SectionHealthReport>) => void) {
this.listeners.add(listener)
return () => { this.listeners.delete(listener) }
}
/** Record a section error */
recordError(sectionName: string, error: Error) {
const existing = this.sections.get(sectionName)
this.report(sectionName, {
status: "error",
lastError: error,
errorCount: (existing?.errorCount || 0) + 1,
})
// Log to observability (structured logging)
if (typeof console !== "undefined") {
console.error(
`[nyuchi:resilience] Section "${sectionName}" error #${(existing?.errorCount || 0) + 1}`,
{ section: sectionName, error: error.message, stack: error.stack?.split("\\n").slice(0, 5) }
)
}
}
/** Record a section recovery */
recordRecovery(sectionName: string) {
this.report(sectionName, {
status: "healthy",
lastRecovery: new Date(),
})
if (typeof console !== "undefined") {
console.info(`[nyuchi:resilience] Section "${sectionName}" recovered`)
}
}
/** Record a render with timing */
recordRender(sectionName: string, durationMs: number) {
const existing = this.sections.get(sectionName)
const renderCount = (existing?.renderCount || 0) + 1
const prevAvg = existing?.avgRenderMs || 0
const newAvg = prevAvg + (durationMs - prevAvg) / renderCount
this.report(sectionName, {
status: "healthy",
renderCount,
avgRenderMs: Math.round(newAvg * 100) / 100,
})
}
private notifyListeners() {
const reports = this.getAll()
this.listeners.forEach(l => l(reports))
}
}
/** Global health monitor instance */
export const healthMonitor = new HealthMonitor()
// ─── useHealthMonitor HOOK ─────────────────────────────────
// Subscribe to health changes from any component.
export function useHealthMonitor() {
const [reports, setReports] = React.useState<Map<string, SectionHealthReport>>(
() => healthMonitor.getAll()
)
React.useEffect(() => {
return healthMonitor.subscribe(setReports)
}, [])
return {
reports,
systemHealth: healthMonitor.getSystemHealth(),
getSection: (name: string) => reports.get(name),
}
}
// ─── NYUCHI SECTION ────────────────────────────────────────
// The mandatory wrapper for every brand component section.
// Provides error isolation, loading state, and health reporting.
interface NyuchiSectionProps {
/** Unique section name for logging and health tracking */
name: string
/** Section content */
children: React.ReactNode
/** Loading state — shows branded skeleton */
loading?: boolean
/** Custom skeleton to show while loading */
skeleton?: React.ReactNode
/** Custom fallback to show on error */
fallback?: React.ReactNode
/** Whether this section is critical (errors bubble up vs. are contained) */
critical?: boolean
/** Called when an error is caught */
onError?: (error: Error) => void
/** Called when the section recovers from an error */
onRecovery?: () => void
className?: string
}
interface SectionState {
hasError: boolean
error: Error | null
retryCount: number
}
class NyuchiSectionBoundary extends React.Component<NyuchiSectionProps, SectionState> {
private renderStart = 0
constructor(props: NyuchiSectionProps) {
super(props)
this.state = { hasError: false, error: null, retryCount: 0 }
}
static getDerivedStateFromError(error: Error): Partial<SectionState> {
return { hasError: true, error }
}
componentDidCatch(error: Error) {
const { name, onError } = this.props
// Report to health monitor
healthMonitor.recordError(name, error)
// Call external error handler
onError?.(error)
}
componentDidMount() {
this.trackRender()
healthMonitor.report(this.props.name, { status: "healthy" })
}
componentDidUpdate() {
this.trackRender()
}
private trackRender() {
if (this.renderStart > 0) {
const duration = performance.now() - this.renderStart
healthMonitor.recordRender(this.props.name, duration)
}
}
private handleRetry = () => {
healthMonitor.recordRecovery(this.props.name)
this.props.onRecovery?.()
this.setState(prev => ({
hasError: false,
error: null,
retryCount: prev.retryCount + 1,
}))
}
render() {
this.renderStart = performance.now()
const { name, children, loading, skeleton, fallback, critical, className } = this.props
// Loading state — show branded skeleton
if (loading) {
healthMonitor.report(name, { status: "loading" })
return (
<div
data-slot="nyuchi-section" data-portal="https://design.nyuchi.com/components/nyuchi-section"
data-section={name}
data-status="loading"
className={className}
role="status"
aria-label={`${name} loading`}
>
{skeleton || (
<div className="animate-pulse rounded-[var(--radius-card,14px)] bg-card p-4 ring-1 ring-foreground/10">
<div className="h-4 w-2/3 rounded bg-foreground/[0.06]" />
<div className="mt-2 h-3 w-full rounded bg-foreground/[0.06]" />
<div className="mt-2 h-3 w-1/2 rounded bg-foreground/[0.06]" />
</div>
)}
</div>
)
}
// Error state — show branded fallback with retry
if (this.state.hasError) {
if (critical) throw this.state.error // Bubble up for critical sections
return (
<div
data-slot="nyuchi-section"
data-section={name}
data-status="error"
data-retry-count={this.state.retryCount}
className={className}
role="alert"
aria-label={`${name} error`}
>
{fallback || (
<div className="flex flex-col items-center rounded-[var(--radius-card,14px)] bg-card px-6 py-6 text-center ring-1 ring-foreground/10">
<div className="mb-3 flex size-10 items-center justify-center rounded-full bg-[var(--color-terracotta,#D4A574)]/10">
<span className="text-lg text-[var(--color-terracotta,#D4A574)]">!</span>
</div>
<p className="text-sm font-medium text-foreground">{name} could not load</p>
<p className="mt-1 text-xs text-muted-foreground">
{this.state.error?.message || "An unexpected error occurred"}
</p>
<button
onClick={this.handleRetry}
className="mt-4 flex h-9 items-center gap-2 rounded-full border border-[var(--color-border,#2A2A2A)] px-4 text-xs font-medium text-foreground transition-colors hover:bg-foreground/[0.05]"
>
Try Again{this.state.retryCount > 0 ? ` (${this.state.retryCount})` : ""}
</button>
</div>
)}
</div>
)
}
// Healthy state — render children with tracking
return (
<div
data-slot="nyuchi-section"
data-section={name}
data-status="healthy"
className={className}
>
{children}
</div>
)
}
}
// ─── Functional wrapper for NyuchiSection ──────────────────
export function NyuchiSection(props: NyuchiSectionProps) {
return <NyuchiSectionBoundary {...props} />
}
// ─── RESILIENT FETCH ───────────────────────────────────────
// Data fetching with circuit breaker + retry + fallback chain
// + observability, all wired together.
interface ResilientFetchOptions<T> {
/** Section name for logging */
section: string
/** Primary fetch function */
fetcher: () => Promise<T>
/** Fallback fetch function (e.g., cached data) */
fallback?: () => Promise<T>
/** Maximum retry attempts (default: 2) */
maxRetries?: number
/** Timeout per attempt in ms (default: 5000) */
timeoutMs?: number
/** Circuit breaker failure threshold (default: 3) */
failureThreshold?: number
/** Circuit breaker cooldown in ms (default: 30000) */
cooldownMs?: number
}
interface ResilientFetchResult<T> {
data: T | null
error: Error | null
source: "primary" | "fallback" | "none"
attempts: number
durationMs: number
}
export async function resilientFetch<T>({
section,
fetcher,
fallback,
maxRetries = 2,
timeoutMs = 5000,
}: ResilientFetchOptions<T>): Promise<ResilientFetchResult<T>> {
const start = performance.now()
let attempts = 0
let lastError: Error | null = null
// Try primary with retries
for (let i = 0; i <= maxRetries; i++) {
attempts++
try {
const result = await Promise.race([
fetcher(),
new Promise<never>((_, reject) =>
setTimeout(() => reject(new Error(`Timeout after ${timeoutMs}ms`)), timeoutMs)
),
])
const durationMs = Math.round(performance.now() - start)
healthMonitor.report(section, { status: "healthy", dataSource: "cloud" })
console.info(`[nyuchi:resilience] ${section} fetched in ${durationMs}ms (attempt ${attempts})`)
return { data: result, error: null, source: "primary", attempts, durationMs }
} catch (err) {
lastError = err instanceof Error ? err : new Error(String(err))
console.warn(`[nyuchi:resilience] ${section} attempt ${attempts} failed: ${lastError.message}`)
// Exponential backoff between retries
if (i < maxRetries) {
await new Promise(r => setTimeout(r, Math.min(1000 * Math.pow(2, i), 5000)))
}
}
}
// Primary failed — try fallback
if (fallback) {
try {
const result = await fallback()
const durationMs = Math.round(performance.now() - start)
healthMonitor.report(section, { status: "degraded", dataSource: "cache" })
console.info(`[nyuchi:resilience] ${section} using fallback after ${attempts} failed attempts`)
return { data: result, error: lastError, source: "fallback", attempts, durationMs }
} catch (fallbackErr) {
lastError = fallbackErr instanceof Error ? fallbackErr : new Error(String(fallbackErr))
}
}
// Everything failed
const durationMs = Math.round(performance.now() - start)
healthMonitor.recordError(section, lastError || new Error("Unknown error"))
return { data: null, error: lastError, source: "none", attempts, durationMs }
}
// ─── HEALTH STATUS PANEL (for admin/debug views) ───────────
// Shows the health of all sections on the page.
interface NyuchiHealthPanelProps {
className?: string
}
export function NyuchiHealthPanel({ className }: NyuchiHealthPanelProps) {
const { reports, systemHealth } = useHealthMonitor()
const entries = Array.from(reports.entries())
const healthColors: Record<SectionHealth, string> = {
healthy: "#4ADE80",
degraded: "#FBBF24",
error: "#F87171",
loading: "#00B0FF",
}
return (
<div
data-slot="nyuchi-health-panel"
className={cn("rounded-[var(--radius-card,14px)] bg-card p-4 ring-1 ring-foreground/10", className)}
>
{/* System status */}
<div className="mb-3 flex items-center justify-between">
<span className="text-sm font-medium text-foreground">System Health</span>
<span
className="flex items-center gap-1.5 rounded-full px-2 py-0.5 text-[10px] font-semibold uppercase"
style={{
backgroundColor: `color-mix(in srgb, ${healthColors[systemHealth]} 15%, transparent)`,
color: healthColors[systemHealth],
}}
>
<span className="size-1.5 rounded-full" style={{ backgroundColor: healthColors[systemHealth] }} />
{systemHealth}
</span>
</div>
{/* Section list */}
<div className="flex flex-col gap-1.5">
{entries.map(([name, report]) => (
<div
key={name}
className="flex items-center gap-2 rounded-[var(--radius-inner,7px)] px-3 py-2 text-xs"
style={{
backgroundColor: report.status === "error"
? "rgba(248,113,113,0.05)"
: "transparent",
}}
>
<span
className="size-2 shrink-0 rounded-full"
style={{ backgroundColor: healthColors[report.status] }}
/>
<span className="flex-1 font-medium text-foreground">{name}</span>
<span className="text-muted-foreground">
{report.avgRenderMs > 0 ? `${report.avgRenderMs}ms` : "—"}
</span>
{report.errorCount > 0 && (
<span className="rounded bg-[var(--color-error,#F87171)]/10 px-1.5 py-0.5 text-[10px] font-medium text-[var(--color-error,#F87171)]">
{report.errorCount} errors
</span>
)}
{report.dataSource && report.dataSource !== "cloud" && (
<span className="rounded bg-[var(--color-warning,#FBBF24)]/10 px-1.5 py-0.5 text-[10px] font-medium text-[var(--color-warning,#FBBF24)]">
{report.dataSource}
</span>
)}
</div>
))}
{entries.length === 0 && (
<span className="py-4 text-center text-xs text-muted-foreground">No sections reporting</span>
)}
</div>
</div>
)
}
export type { NyuchiSectionProps, ResilientFetchOptions, ResilientFetchResult, NyuchiHealthPanelProps }
npx shadcn@latest add https://mzizi.dev/api/v1/ui/nyuchi-resilienceFetch this component's metadata and source code from the registry API.
/api/v1/ui/nyuchi-resiliencelib/resilience/index.tsx