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A technical guide on choosing between Point-to-Point, Publish-Subscribe, and Request-Response patterns in the Vert.x Event Bus to optimize load balancing and event delivery.
Stop using direct object references in Vert.x. Learn how to use the Event Bus to decouple verticles using point-to-point, request-response, and pub-sub patterns for scalable architecture.
Shows how to define requirements, build the minimal Vert.x Event Bus design with custom MessageCodec, set trust boundaries, monitor operation, and recognise when to evolve the design.
Learn how to use the Vert.x Event Bus to decouple microservices. Explore point-to-point and pub/sub patterns with a practical order-processing example and payload optimization tips.
Learn how to use the Vert.x Event Bus send() method to distribute workloads across multiple verticles using point-to-point messaging and avoid common event-loop blocking pitfalls.
vertxdistributed-systemsTasadduq Burneyowner28.5K rep · 11 Jun 2026, 18:03 UTCI'm designing an integration test suite for a service built on norg, the lightweight Java event bus. The production setup publishes events through a store that requires credentials, but I want the test suite to run in CI without any secrets. The documentation shows a sample integration using an in-memory event store, which looks like the right fit. What I'm
Vert.x Event Bus Distributed Routing In a clustered environment, the Event Bus relies on a Cluster Manager to maintain a shared registry of nodes and their associated addresses. When a message is dispatched to a specific address, the local node utilizes its cached view of the cluster membership to route the request. Membership Propagation Delay There is a kn
Determine whether Vert.x should allow a dedicated worker pool for specific verticles to isolate blocking work and reduce latency under concurrent HTTP requests that publish to a shared Event Bus address. The current implementation uses a single global worker pool shared by all worker verticles; under high concurrency the pool can saturate, causing latency sp
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