Overview

Backendless Custom Business Logic is a system designed to allow extensibility and customization of an app backend with custom server-side code. Using Business Logic developers can override and extend the built-in Backendless services or deploy custom API services. The system supports the following types of custom business logic:

API Services	Hosted Services These services are created based on the deployed Java and JavaScript/Node.js code. For each service Backendless automatically generates REST routes and native SDKs. Overview Quick Start Guide Imported Services These services are created from an external definition such as a WSDL or RAML document or AWS Lambda Functions.
API Event Handlers	This is the code overriding or extending behavior of the built-in Backendless services (User, Data, Geo, etc services). Overview Quick Start Guide
Timers	Java or Javascript/Node.js code which runs according to a schedule. Overview

The diagram below illustrates all business logic components within Backendless. The green blocks represent custom server-side code: