Breaking Changes

This document provides a list of breaking changes since the V1 release of the stomp client library.

v2 and v3

Module support

Version 2 was released before module support was present in golang, and changes were tagged wit that version. Therefore we had to update again the import path.

The API it's stable the only breaking change is the import path.

Version 3:

import (
    "github.com/go-stomp/stomp/v3"
)

v1 and v2

1. No longer using gopkg.in

Version 1 of the library used Gustavo Niemeyer's gopkg.in facility for versioning Go libraries. For a number of reasons, the stomp library no longer uses this facility. For this reason the import path has changed.

Version 1:

import (
    "gopkg.in/stomp.v1"
)

Version 2:

import (
    "github.com/go-stomp/stomp"
)

2. Frame types moved to frame package

Version 1 of the library included a number of types to do with STOMP frames in the stomp package, and the frame package consisted of just a few constant definitions.

It was decided to move the following types out of the stomp package and into the frame package:

stomp.Frame -> frame.Frame
stomp.Header -> frame.Header
stomp.Reader -> frame.Reader
stomp.Writer -> frame.Writer

This change was considered worthwhile for the following reasons:

This change reduces the surface area of the stomp package and makes it easier to learn.
Ideally, users of the stomp package do not need to directly reference the items in the frame package, and the types moved are not needed in normal usage of the stomp package.

3. Use of functional options

Version 2 of the stomp library makes use of functional options to provide a clean, flexible way of specifying options in the following API calls:

Dial()
Connect()
Conn.Send()
Transaction.Send()
Conn.Subscribe()

The idea for this comes from Dave Cheney's very excellent blog post, Functional Options for Friendly APIs.

While these new APIs are a definite improvement, they do introduce breaking changes with Version 1.

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