# Storage Validator OSGI Service

> This enhancement introduces a new Storage Validator extension point to iDempiere.

**Goal:** New OSGI Service

**Developer:** pultzlucas

**Feature** **Ticket:** [IDEMPIERE-7011](https://idempiere.atlassian.net/browse/IDEMPIERE-7011)

**Overview**

The feature allows developers to implement custom validations for inventory storage movements and reservation updates using OSGi services.

The validation is executed automatically whenever:

- On Hand Storage (`MStorageOnHand`) is updated
- Reserved Storage (`MStorageReservation`) is updated

This makes it possible to implement warehouse-specific, business-specific, or compliance-related inventory validations without modifying the core inventory logic.

**Motivation**

Different installations frequently require custom validation rules for inventory movements.

Examples include:

- Restricting inventory movement by warehouse
- Blocking movement based on product rules
- Validating reservations against external systems
- Enforcing logistics or fulfillment constraints
- Preventing movement in special operational scenarios

Before this enhancement, these validations often required core modifications.

The new extension point provides a clean and modular mechanism for implementing custom validation logic.

**New Interface**

- `IStorageValidator`: implement it as an OSGi service. Its method is `validate(PO po, BigDecimal movementQty, IReservationTracer tracer, String trxName)`.

The core component `StorageValidatorProvider` collects all `IStorageValidator` services and calls them in descending `service.ranking` order. There is no factory interface.

**Benefits**

- Provides a clean extension mechanism
- Follows existing iDempiere service patterns
- Supports modular OSGi implementations
- Simplifies maintenance and upgrades
- Improves flexibility for warehouse processes