Error Handling

Comprehensive guide to error handling in Goa, covering error definition, transport mapping, custom error types, and best practices for building reliable APIs.

Effective error handling is crucial for building reliable and maintainable APIs. Goa provides a robust DSL to define and manage errors within your services, ensuring consistent and clear communication between your server and clients. This section covers all aspects of error handling in Goa, from defining errors to mapping them to transport-specific status codes and best practices for implementation.

In This Section

Introduction

Learn about Goa’s error handling capabilities, including its design-first approach, error definition DSL, and how it ensures consistent error handling across different transports.

Defining Errors

Master the art of defining service-level and method-level errors in Goa using its DSL, including custom error types and reusable error definitions.

Error Types

Explore Goa’s error type system, including the default ErrorResult type and how to create custom error types for more complex error scenarios.

Mapping Errors to Transport Status Codes

Learn how to map Goa errors to appropriate HTTP and gRPC status codes, ensuring consistent error responses across different transport protocols.

Producing and Consuming Errors

Guide to generating and handling errors in Goa services, including using generated helper functions and handling errors on the client side.

Overriding Error Serialization

Customize how Goa serializes errors by implementing custom error formatters and handling specific error types with tailored responses.

Best Practices

Essential guidelines and recommended practices for implementing robust error handling in your Goa services, including naming conventions and testing strategies.