hemera

We rewrote the extension / middleware lifecycle and the plugin system.

Extension lifecycle

• Removed async/await support in extensions due to performance and simplicity.
• Removed support for generator functions.
• Call send multiple times has no side effects.
• First replied error is set others are ignored.
• First replied value is sent others are ignored.
• Request lifecycle is not aborted on business errors.
• Removed req.locals.

Middleware

• next has to be called explicit in the middleware.
• Removed support for generator functions.
• Pass reply interface instead of the raw resp object.
• Removed req.locals.

Plugin

• New Plugin signature function(hemera, options, done).
• Plugin name is passed in options export.options = { name: 'myPlugin' } and is required.
• exports.attributes was removed.
• You can register .use() plugins in plugins the order is resolved correctly.
• Enjoy all benefits of the Avvio module. We use it to bootstrap plugins asynchronously.
• Introduce .decorate(name, fn, [deps,]) to expose data in plugins or on root.

Act

• Removed support for generator functions.

Add

• Removed support for generator functions.

Performance

• Increased by ~35% benchmark

General

• Removed circuit breaker implementation. We will investigate in a plugin.
• Emit clientResponseError or serverResponseError only for middleware, extensions or fatal errors not when an error is replied by the user.
• Removed expose and use prototype based decorations.
• Use Avvio to bootstrap plugins asynchronously.
• Graceful shutdown routine as a separate plugin.
• Use prettier with standardjs linting rules.
• Added more unit tests.

Add static typing by Flow

Breaking changes:

• Parambulator has been removed. There is no longer default payload validator. Please see Packages

Features:

• Add lerna for easier managing of multiple packages
• Add extension points