PIPELINE FLOW
LAYER 1
Android HHT
v12.098 · Zebra TC-series
Active
HTTPS
LAYER 2
Azure App Service
v2-hht-api · P1V2 · Central India
Checking…
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LAYER 3
Azure Relay HC
java-mw-9080 · Service Bus
1 Listener
TUNNEL
LAYER 4
Server 200 · Java
192.168.144.200:9080 · Tomcat/JCo
Checking…
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LAYER 5
SAP S/4HANA
192.168.144.185 · Client 600
Responding
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LAYER 6
CDN · R2
assets.eatnubo.com · APK
26.9 MB
200 OK
TOTAL RFC CALLS
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Since last restart
AVG LATENCY
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Azure→SAP roundtrip
SUCCESS RATE
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Infrastructure errors
ACTIVE / REGISTERED
— / 117
never-called: loading…
persist: checking…
BOTTLENECKS — SLOWEST RFCs (avg ms)
Avg latency
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LIVE RFC FEED — LAST 15 CALLS
Live
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OPCODE PERFORMANCE TABLE — ALL RFCs
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| OPCODE | CAT | CALLS | ERRORS | AVG ms | MIN ms | MAX ms | P95 ms | LATENCY PROFILE |
|---|---|---|---|---|---|---|---|---|
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OPTIMISATION OPPORTUNITIES
Response Caching Layer
Cache read-only RFC responses in Azure Memory Cache. Opcodes like
storegetbin_v2, packgingmaterial, zwm_store_get_major_cat return near-static data. 60-second TTL would cut SAP load by ~40% during rush hours.⬆ HIGH IMPACT — 40% fewer SAP calls
HC Proxy IP Pre-warm
App Service restarts force a full 127.0.0.x scan (4s cold start). Store the discovered HC proxy IP in Azure App Settings and update it via a Cloudflare Worker health-check every 5 minutes. Eliminates cold-start latency spike on restart.
⬆ HIGH IMPACT — eliminates 4s cold start
Per-Store Error Alerting
Route App Insights logs to a Cloudflare Worker that parses
[HHT] lines and sends WhatsApp alerts when a specific store has >10 consecutive errors — indicates a connectivity or device issue at that store before staff escalate.⬆ HIGH IMPACT — proactive monitoring
Response Compression
Large opcodes like
storegetbin_v2 return 2-4KB of bin codes over HTTPS. Enable GZIP on the Azure App Service. On 1000 devices making ~20 calls/day this saves ~160MB/day in cellular data — matters for stores on 4G dongles.→ MED — bandwidth savings on 4G stores
Parallel RFC Fan-out
Dashboard screens call 2-3 SAP RFCs sequentially. Middleware can detect multi-opcode requests (comma-separated) and fire them in parallel, returning combined response. Example: login screen needs
scnrec + storegetbin_v2 — both can run simultaneously.→ MED — faster screen loads
Auto-APK Push via HC
When a new APK is deployed to CDN, push a silent notification to all connected devices via a Cloudflare Worker → Azure Event Grid → HC → Java middleware broadcast. Devices auto-download in background instead of waiting for next login.
↗ LOW — nice to have for 1000-device rollout
CLOUDFLARE WORKERS — AUTOMATION LAYER
⚡
hht-health-monitor
Cron every 5 min → hits
/api/hht/health → parses Java status + latency → updates KV store → sends WhatsApp via n8n if Java unreachable for >2 consecutive checks. Auto-detects HC IP shift and updates App Setting.⏱ cron: */5 * * * *
📊
hht-stats-aggregator
Cron every 15 min → hits
/api/hht/stats → parses opcode table → writes to D1 database with timestamp → builds 7-day history of latency trends per RFC. Powers weekly performance report to your WhatsApp.⏱ cron: */15 * * * *
🚀
hht-apk-publisher
GitHub webhook → on new release tag → download APK from GitHub → upload to R2 → update appversion response → send WhatsApp to store managers with download link. Fully automated zero-touch APK distribution pipeline.
→ github webhook trigger
🛡️
hht-rate-limiter
Cloudflare WAF rule + Worker: limit each device IP to 600 req/min (10 rps). Blocks runaway retry loops that could flood SAP. Returns
E#Too many requests — Android app handles this gracefully with 2s backoff.→ WAF + Worker combo
💾
hht-rfc-cache
Worker intercepts read-only opcodes (
storegetbin_v2, packgingmaterial, zwm_store_get_major_cat) → checks KV cache → returns cached response within 1ms if fresh → falls through to Azure if stale. 60s TTL per store.→ KV cache layer
📋
hht-log-forwarder
Scheduled Worker reads App Insights → parses
[HHT] structured logs → writes daily CSV to R2 → sends summary to your email/WhatsApp every morning: top 5 slowest RFCs, stores with most errors, total call volume by hour.⏱ cron: 0 7 * * * (7am IST)
AZURE APP SERVICERunning
PlanP1V2 Premium
RegionCentral India
Runtime.NET 4.8 / Windows
App Insights90d retention
HC Tunneljava-mw-9080 ✓
SAP Pool50 / 300 peak
ANDROID APKv12.098
Version12.098
APK Size26.9 MB
Default ServerAzure Prod ✓
Volley Timeout90,000ms
Upgrade Modeforce
CDNassets.eatnubo.com ✓
SERVER 200 · SAPOn-prem proxy
Server192.168.144.200
OSWindows Server 2012
RoleJava/JCo proxy only
SAP Host192.168.144.185
SAP Client600 / SysNum 02
UserBATCHUSER