Examples

advanced20 min

Answer Aggregation (async)

Learn broker request-response, events, timeouts, context, and multi-service aggregation through one simple answer application.

4 services1 broker0 databases

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advanced10 min

Answer Aggregation (sync)

Learn service-level aggregate by combining several synchronous API calls into one structured or transformed answer.

4 services0 brokers0 databases

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medium15 min

Audit Service

Record immutable audit actions and list them by actor or tenant, with idempotent recording and offset/limit pagination backed by Postgres.

1 service0 brokers1 database

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medium25 min

Component Order Fulfillment

Build a single order-management service from reusable, explicitly wired components that validate, enrich, reserve, and fulfill an order.

1 service0 brokers0 databases

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medium20 min

Order Management: Entity-Based FSM

Persist orders and let a finite state machine enforce their approval, shipment, delivery, and cancellation lifecycle.

1 service0 brokers1 database

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medium15 min

Gateway Answer Hub

Expose one public API over independent answer providers, forwarding matching operations automatically and routing one explicitly through broker request-response.

4 services1 broker0 databases

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medium15 min

gRPC Gateway Answer Hub

Expose one public gRPC API over independent answer providers, forwarding matching methods to provider gRPC APIs automatically and routing one explicitly through broker request-response.

4 services1 broker0 databases

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easy15 min

Calculator: In-Memory FSM

Learn how to define and use an in-memory finite state machine through a calculator whose current state selects its behavior.

1 service0 brokers0 databases

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medium15 min

Inventory Management

Model inventory visibility, locations, material types, stock movements, batch tracking, expiry, and replenishment levels.

1 service0 brokers1 database

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advanced35 min

Invoice Approval Workflow (FSM)

Submit persistent invoices and control approval or rejection with an entity-based finite state machine.

1 service0 brokers1 database

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easy10 min

Broker-Based Math Service

Route addition and subtraction requests through typed broker channels to specialized services.

3 services1 broker0 databases

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advanced45 min

Order Exchange

Exchange orders with six partners over every combination of REST, SOAP, and gRPC, inbound and outbound, push and pull, mapping each partner's own format at the integration boundaries.

11 services1 broker0 databases

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advanced30 min

Purchase Order Orchestration

Compose scheduled API input, synchronous API calls, broker request-response, triggered and scheduled aggregation, shipment events, and generated operational views.

9 services1 broker0 databases

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advanced25 min

Role-Based Access Control (RBAC)

Resolve allow or deny access for hierarchical roles and hierarchical resources from a sparse, explicitly assigned access matrix.

1 service0 brokers1 database

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medium20 min

Scheduled Operations Monitor

Model recurring operational work with reusable schedules, an API-backed service, and a generated monitoring UI.

4 services0 brokers0 databases

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medium10 min

Simple Vault Usage

Define typed secrets in several logical vaults and expose them through one service.

1 service0 brokers0 databases

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medium15 min

SOAP Gateway Answer Hub

Expose one public SOAP API over independent answer providers, forwarding matching operations to provider SOAP APIs automatically and routing one explicitly through broker request-response.

4 services1 broker0 databases

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easy10 min

Store Service

Provide a generic, TTL-based in-memory key-value store that other microservices can use to put, get, pop, check, and delete arbitrary JSON values.

1 service0 brokers1 database

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easy10 minRecommended start

Task Manager

Create, find, update, and delete persistent tasks through an API while applying task lifecycle rules.

1 service0 brokers1 database

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medium15 min

XML Gateway Answer Hub

Expose the same gateway over independent answer providers as Gateway Answer Hub, but with every operation declaring @response:xml so it answers in XML instead of JSON.

4 services1 broker0 databases

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