Polyglot GraphQL Federation: Part 5 - Observability Across the Stack

Polyglot GraphQL Federation: Part 5 - Observability Across the Stack

Implement end-to-end observability for polyglot GraphQL federation with OpenTelemetry, Tempo, Prometheus, Loki, Alloy, and Pyroscope, including tail sampling, SLOs, and cross-signal correlation.

Arthur CostaAArthur Costa
2026-05-06New

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Insights and thoughts on modern technology, software engineering, and web development — with a bias toward real-world systems and performance.

Currently exploring Off-Heap Algorithms in Java.

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Polyglot GraphQL Federation: Part 5 - Observability Across the Stack
New

Polyglot GraphQL Federation: Part 5 - Observability Across the Stack

Implement end-to-end observability for polyglot GraphQL federation with OpenTelemetry, Tempo, Prometheus, Loki, Alloy, and Pyroscope, including tail sampling, SLOs, and cross-signal correlation.

GraphQLFederationOpenTelemetry+8
Arthur CostaAArthur CostaMay 6, 202645 min readNew
Polyglot GraphQL Federation: Part 4 - Kong, Apollo Router, and Query Planning
New

Polyglot GraphQL Federation: Part 4 - Kong, Apollo Router, and Query Planning

How two gateways compose into a secure, observable API layer with intelligent query planning across subgraphs.

GraphQLFederationKong+5
Arthur CostaAArthur CostaApr 21, 202622 min readNew
Polyglot GraphQL Federation: Part 3 - When GraphQL Meets gRPC and REST
New

Polyglot GraphQL Federation: Part 3 - When GraphQL Meets gRPC and REST

GraphQL is not the only protocol in a federated platform. This article explores how gRPC handles internal Java-to-Java communication while REST powers Stripe payment integration in Go.

GraphQLgRPCREST+6
Arthur CostaAArthur CostaApr 6, 202624 min readNew
Polyglot GraphQL Federation: Part 2 - Three Languages, One Schema
New

Polyglot GraphQL Federation: Part 2 - Three Languages, One Schema

How Java, Go, and TypeScript each implement GraphQL Federation 2 subgraphs with entity resolution, schema directives, and database-per-service isolation in a real e-commerce platform.

GraphQLFederationJava+6
Arthur CostaAArthur CostaMar 22, 202628 min readNew
Polyglot GraphQL Federation: Part 1 - The Monolith's Breaking Point
New

Polyglot GraphQL Federation: Part 1 - The Monolith's Breaking Point

Why monolithic GraphQL APIs collapse under the weight of growing teams and domains. An introduction to GraphQL Federation 2 and the architecture behind a polyglot e-commerce platform.

GraphQLFederationMicroservices+4
Arthur CostaAArthur CostaMar 7, 202620 min readNew
The Disruptor Pattern: Multi-Stage Event Processing Pipelines
New

The Disruptor Pattern: Multi-Stage Event Processing Pipelines

Implement LMAX Disruptor-style event processing with sequence barriers, multi-stage pipelines, and batch processing for ultra-low latency systems.

JavaOff-HeapDisruptor+5
AnonymousFeb 12, 202651 min readNew
Lock-Free MPMC Queues: Dual Contention Mastery
New

Lock-Free MPMC Queues: Dual Contention Mastery

Master the complexity of Multi-Producer Multi-Consumer lock-free queues with per-slot sequence numbers, dual CAS coordination, and work-stealing thread pool integration.

JavaOff-HeapConcurrency+5
AnonymousJan 29, 202650 min readNew
Lock-Free MPSC Queues: Production-Grade Implementation
New

Lock-Free MPSC Queues: Production-Grade Implementation

A deep-dive into building production-grade Multi-Producer Single-Consumer lock-free queues in Java, with VarHandle, CAS operations, and real-world benchmarks.

JavaOff-HeapConcurrency+5
AnonymousJan 15, 202651 min readNew
Sharded Processing: Per-Core Isolation for Zero Contention
New

Sharded Processing: Per-Core Isolation for Zero Contention

Eliminate contention entirely with per-CPU-core sharded buffers, thread affinity, and isolated processing lanes for maximum parallelism.

JavaOff-HeapSharding+5
Arthur CostaAArthur CostaJan 4, 202650 min readNew
Wait-Free Telemetry: Never-Blocking Observability
New

Wait-Free Telemetry: Never-Blocking Observability

Build wait-free telemetry buffers that never block producers, with overwrite semantics for high-frequency trading observability that doesn't impact system performance.

JavaOff-HeapWait-Free+5
Arthur CostaAArthur CostaJan 4, 202650 min readNew