Roughly one year after the initial code contribution of Eclipse Ditto and several
milestone releases our team is very proud to announce the first official release of Ditto: 0.8.0.
Different to milestone releases which we already did this release is completely IP (intellectual property) checked by the Eclipse Foundation meaning that project code as well as all used dependencies were “[…] reviewed to ensure that the copyrights expressed are correct, licensing is valid and compatible, and that other issues have been uncovered and properly investigated.”
What’s in this release?
Eclipse Ditto 0.8.0 focuses on providing advanced capabilities in building and working with the digital twins pattern.
Building and exposing digital twins is possible via different APIs: HTTP/REST, WebSockets, AMQP 1.0, AMQP 0.9.1 and
MQTT 3.1.1 are supported.
Interaction with the bidirectional APIs is done via the “Ditto Protocol”, a protocol Ditto defined for twin interaction.
When working with a large set of twins (millions of), searching, finding and selecting partial data is possible.
On all APIs, Ditto ensures that only authorized subjects may interact (read/write) with the digital twins with the use
of fine grained policies.
In order to build digital twins of real world devices several integration approaches may be applied.
Ditto can establish a connection to Eclipse Hono or other AMQP 1.0 endpoints, AMQP 0.9.1 brokers or MQTT 3.1.1 brokers
(e.g. Eclipse Mosquitto) and optionally transform received messages to “Ditto Protocol”.
Powerful devices may alternatively directly send their data to Ditto’s HTTP/WebSocket endpoints in order to reflect
changes made to them.
For integrating with Eclipse Hono this release makes it possible to subscribe to telemetry/events from devices connected via Hono and to also send command&control messages to devices connected to Hono and correlate replies from Hono accordingly.
Changelog
Compared to the latest milestone release 0.8.0-M3, the following changes, new features and bugfixes were added.
New features
Support Hono’s command&control in Ditto connectivity
Eclipse Ditto can now map arbitrary headers when connecting to AMQP 1.0 endpoints or AMQP 0.9.1 brokers. That way Ditto can send “command&control” messages to Eclipse Hono and correlate a potential response coming from a device.
Bugfixes
This release contains several bugfixes, this is a complete list of the merged pull requests.
API stability
As you noticed, Ditto is not yet released as 1.x version, it is still an incubating Eclipse project.
That means that the project could choose to break APIs at any time without prior deprecation.
We however can already guarantee that at the HTTP API for API version 1 and 2 the
API stability is already ensured for the core functionality of managing things and policies.
As the commercial product based on Eclipse Ditto, Bosch IoT Things, is already used productive and in various projects, the API stability has to be and will be ensured moving forward towards a 1.0.0 release.
Roadmap
The Ditto project plans on releasing (non-milestone releases) twice per year, once every 6 months.
In summer 2019 we expect to release a version 0.9.0 and in late 2019 we expect to graduate (exit the Eclipse incubation phase) with a 1.0.0 release.
The plans towards which features will roughly be included will be added soon.