Notes from the cluster
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Saga Pattern: Distributed Transactions Without 2PC
Saga pattern vs two-phase commit: local transactions and compensating events, not distributed locks. Choreography, state machines, and timeouts on Hazelcast.
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A Note on Observability
A short interstitial on why the observability post got pushed back to later in the series — and why that didn’t change anything about when to instrument the code. Instrument early; you’ll thank yourself at 2 AM on phase 3.
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Hazelcast Materialized Views: CQRS for Sub-ms Reads
Event sourcing makes writes easy — but queries? Hazelcast materialized views + CQRS: pre-computed projections, sub-ms reads, no HTTP fan-out across services.
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Hazelcast Jet Event Pipelines: A Six-Stage Walkthrough
Hazelcast Jet’s six-stage pipeline turns an event into a persisted record, view update, and notification in under a millisecond — and the traps to avoid.
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Event Sourcing on Hazelcast: A Practical Introduction
Every UPDATE destroys information. Event Sourcing on Hazelcast stores events, not state — fast writes, Jet pipelines, sub-millisecond materialized views.
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How Baseball Invented Event Sourcing 150 Years Ago
Event Sourcing isn’t a 2020s pattern — it’s the baseball scorecard, written 150 years ago. Append-only logs, derived state, full audit trail in pencil.
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Launching a Claude Code Project: Design Before You Build
How to launch a Claude Code project: nine design documents from Claude’s desktop interface, then a handoff to Claude Code — all before writing any code.
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Hazelcast Microservices Framework: Event Sourcing Demo
A demonstration framework for event-sourced microservices on Hazelcast — built years ago, completed recently with Claude Code as the AI pair-programmer.
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Event-Driven Microservices: Avoiding Distributed Monoliths
Microservices done wrong become distributed monoliths — same coupling, more ops. Event-driven architecture decouples for real, with eventual-consistency costs.
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A fresh start
I’ve repurposed my previous personal, travel-oriented blog to be more developer focused, giving me a place to share technical content now that I’m semi-retired. I still have an interest in programming and technology in general, so I’ll be reporting on topics I find interesting as I pursue projects that excite me. Watch this space for…
Nodes and Edges 