Gateway Domain-Centric Routing: A Vendor-Agnostic Metadata-Driven Architecture for Enterprise API Governance - Version 5.0

Gateway Domain-Centric Routing (GDCR) – Version 5.0A Vendor-Agnostic Metadata-Driven Architecture for Enterprise API GovernanceJavaScript “Maverick Ghost” Reference Implementation v15.1 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ This paper introduces Gateway Domain-Centric Routing (GDCR), a vendor-agnostic architectural framework designed to structurally reduce API and integration sprawl by routing requests through business semantics rather than system-specific proxies.Instead of multiplying gateways and packages per backend, GDCR uses a metadata-driven control plane to route traffic by domain, entity, and action (e.g., /sales/orders/create).Version 5.0 consolidates the model with a validated SAP BTP reference implementation combining DCRP (gateway) and PDCP (orchestration), achieving up to 90% structural reduction while preserving performance, security, and vendor flexibility. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ WHAT WAS VALIDATED — GDCR v5.0 (Sandbox & Trial Environments) The GDCR v5.0 reference implementation was validated through a controlled Proof-of-Concept campaign executed in SAP BTP Sandbox and Trial environments. The objective was not to benchmark raw throughput, but to validate architectural correctness, determinism, and governance impact of domain-centric, metadata-driven routing. Structural Consolidation Results Across four business domains (Sales, Finance, Logistics, Procurement), GDCR achieved: API Proxies: 41 → 4 (≈90% reduction) Integration Packages: 39 → 4 (≈90% reduction) Technical Users: 39 → 12 (≈69% reduction) Deployment Time: 273 min → 14.5 min (≈95% faster) These reductions were obtained without loss of functional coverage, while increasing the number of supported vendors and protocols. Technical Validation Summary Messages processed: 33,000+ (v14.2 baseline), extended to 106,000+ in later v15.x validation Success rate: 99.92–100% Routing errors: 0 KVM failures: 0 Timeouts: 0 Average end-to-end latency remained within enterprise integration norms, with GDCR routing overhead accounting for only a fraction of total response time. Important: All metrics refer to sandbox and trial environments and are presented as architectural validation, not production benchmarks. Validation Milestones (Condensed) Milestone 1 — Gateway Resilience (Soak Test) ~25,000 requests over ~1 hour 100% success rate Stable JavaScript heap and KVM behavior No memory leaks detected Milestone 2 — Multi-Vendor Domain Consolidation 39 vendors routed through 2 domain proxies Deployment completed in minutes using metadata only Correct routing validated across heterogeneous backends Milestone 3 — Multi-Domain Stress Test 4 domains, 4 proxies, ~3,000 calls 100% success rate No measurable degradation versus direct routing Milestone 4 — Extended Off-Hours Validation 5,000+ iterations under low-contention conditions Stable latency and zero failures Full load profiles, screenshots, and raw metrics are provided in Appendix D. Performance Interpretation (v5.0 Positioning) GDCR does not attempt to outperform backend systems. Its goal is to ensure that semantic abstraction and governance do not introduce prohibitive overhead. Observed results confirm that: Metadata-driven routing adds single-digit millisecond overhead at the gateway level. Backend processing time remains the dominant latency factor. Architectural consolidation does not penalize runtime behavior. Organizational Impact (Non-Prescriptive) GDCR v5.0 demonstrates that domain-centric consolidation can translate into tangible operational benefits: Reduced governance surface (fewer proxies, packages, credentials) Faster onboarding of new routes through metadata changes only Clear ownership by business domain instead of system silos Any financial or ROI assessment must be performed independently by adopting organizations, considering their licensing models, operational costs, and governance maturity. Disclaimer on Scope and Guarantees All results were obtained in sandbox and trial environments. GDCR v5.0 is presented as an architectural reference, not a production blueprint. No warranty is expressed or implied; the author assumes no liability for usage. Evolution to v15.1 — The Maverick Ghost Edition All validation milestones above were executed using JavaScript v14.2 as baseline.Version v15.1 (Maverick Ghost) introduces algorithmic optimizations (binary search O(log n), zero-allocation string handling, strict normalization rules) that further reduce routing latency and improve determinism. These improvements do not change the architectural conclusions, but reinforce that GDCR’s control-plane model scales without becoming a performance bottleneck. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ RELATED WORK Blog Posts: • Medium: Gateway Domain-Centric Routing https://medium.com/@rhviana/gateway-domain-centric-routing-a-vendor-agnostic-api-architecture-52ad30d1d1d9 Code: GitHub repo under construction: https://github.com/rhviana/gdcp - Under Construction release date 27/02 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ALTERNATIVE NAMES (FOR SEARCH/DISCOVERY) GDCR has been called by different names in different contexts: • DCRP (Domain-Centric Routing Pattern) • MDAGR (Metadata-Driven API Gateway Routing) • DOAGA (Domain-Oriented API Gateway Architecture) • APSRA (Anti-Proxy-Sprawl Routing Architecture) • Informal: "The Viana Pattern", "Commander's Brain", "Maverick Ghost" Pick whichever resonates with your architecture style. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ CONTACT Ricardo Luz Holanda Viana Independent Researcher & SAP Integration Architect 📧rhviana@gmail.com LinkedIn: https://www.linkedin.com/in/ricardo-viana-br1984/ Medium: @rhviana Questions, feedback, and collaboration inquiries welcome. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ LICENSE & TRADEMARK License: CC BY 4.0 (share, adapt, commercial use OK with attribution) Trademark: Maverick Engine™ is a trademarked component of GDCR. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ACKNOWLEDGMENTS Thanks to the SAP Community for feedback on DCRP/PDCP, and to the architects who validated this in real sandboxes. No external funding—just independent research. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ CITATION APA: Viana, R. L. H. (2026). Gateway Domain-Centric Routing: A Vendor-Agnostic Metadata-Driven Architecture for Enterprise API Governance - Version 4.0 . Zenodo. 10.5281/zenodo.18582492 | https://doi.org/10.6084/m9.figshare.31331683 BibTeX: @techreport {gdcr-paper-v4.0, author = {Viana, Ricardo Luz Holanda}, title = {Gateway Domain-Centric Routing - Version 15.1}, year = {2026}, doi = {10.5281/zenodo.18582492}, institution = {Independent Research} } ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ VERSION HISTORY • V4.0 (Feb 12, 2026): Javascript Maverick Ghost Edition v15.1 Binary search, case-insensitive routing, observability, Chapter 9 validation evidence • V1.0 JavaScript 14.2 (Feb 9, 2026): Sandbox validation, 33k+ messages • V1.0 (Feb 10, 2026): Initial concept ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Ricardo Luz Holanda Viana Enterprise Integration Architect - SAP BTP Integration Suite