---
title: "Exceptions"
description: "Exceptions"
type: "docs"
category: "doc"
tags: []
authors: [Anonymous]
date: "2026-10-10"
last_update: "2026-10-10"
time_minutes: 1
draft: false
unlisted: false
url: "https://www.derafu.dev/docs/core/backbone-dispatcher/exceptions"
---

# Exceptions

```
InvalidOperationIdException     — malformed "package.component.worker::operation" id.
InvalidDiscoveryIdException     — malformed discovery id passed to Explorer::describe().

ResolverException
├── InvalidParameterTypeException — a scalar parameter has the wrong native type.
└── MissingParameterException     — a required parameter is absent.

ObjectFactoryException
├── ClassNotFoundException            — fromArray() target class doesn't exist.
├── FromArrayMethodNotFoundException  — target class has no static fromArray().
└── NoDeserializerFoundException      — no registered deserializer, and the fallback failed too.

OperationNotFoundException  — the operation does not exist as a public method of the worker.
OperationNotAllowedException — the operation exists, but the active OperationPolicyInterface rejects it.
```

Every exception exposes a semantic static factory (`InvalidOperationIdException::forId()`, `MissingParameterException::forParameter()`, etc.) instead of a public constructor, and is translatable via [`derafu/translation`](https://www.derafu.dev/docs/core/translation).



---
Last updated on 10/10/2026