Using the Apache Fineract batch API
Combining several Fineract API calls into one request: enclosing them in a single transaction, referencing results of earlier requests, error behavior and when batch calls beat many single calls.
Apache Fineract API and custom development
Building on Fineract's REST API and extending it without forking: batch requests, idempotency, generated clients, custom modules, jobs, business steps, processors, events and testing.
Idempotency keys in the Apache Fineract API
Making repayments and disbursements safe to retry: sending an idempotency key header, how Fineract matches action and entity, cached results and HTTP 409 on in-progress duplicates, and idempotency inside batch requests.
Generating Apache Fineract API clients from the OpenAPI spec
Producing typed clients for Fineract: the OpenAPI 3.0.3 specification, building fineract-client.jar, generating clients for other languages and keeping clients in step with each release.
Building Apache Fineract custom modules
Extending Fineract without editing core sources: the custom folder convention, starter auto-configuration, replaceable services, packaging modules into your image and keeping them compatible across upgrades.
Writing custom batch jobs for Apache Fineract
Adding your own scheduled jobs: Spring Batch job and tasklet definitions, the database migration that registers the job, job name configuration and deployment in a custom module.
Writing custom Loan COB business steps in Apache Fineract
Adding country or institution specific end-of-day logic to the Loan COB job: implementing a business step, registering it with a database migration and ordering it through the steps API.
Custom loan transaction processors in Apache Fineract
Implementing your own repayment allocation logic: writing a transaction processor, overriding the processor factory and testing allocation against existing products before production.
Customizing Apache Fineract business events and Avro schemas
Adding or enriching events that Fineract publishes: new BusinessEvent classes, Avro schemas in fineract-avro-schemas, bigdecimal fields, and higher-priority custom serializers for existing events.
Testing Apache Fineract customizations
Building a regression suite for a customized Fineract: Cucumber end-to-end tests, integration tests against a running backend, business date control and test data for loans, accounting and COB.
Building a custom front end on the Apache Fineract API
Planning staff or customer apps on headless Fineract: starting from the Mifos X web app or building your own, tenant headers, authentication, API paging and keeping self-service APIs out of public apps.
