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<h1 class="post-title" itemprop="name headline">Announcing Eclipse Ditto Release 2.0.0</h1>
<p class="post-meta">Published by <img src="https://www.gravatar.com/avatar/1993375e06bf8a2b236b5862792a0532?s=135" alt="A photo of Thomas Jäckle" style="width:50px;border-radius:50%;display:inline-block;margin-right:5px;" /><span itemprop="author" itemscope itemtype="http://schema.org/Person"><span itemprop="name"><a href="https://github.com/thjaeckle" target="_blank">Thomas Jäckle</a> </span></span> on <time datetime="2021-05-06T00:00:00+00:00" itemprop="datePublished">May 6, 2021</time> - Tags:
<a href="tag_blog.html">blog</a>
</p>
</header>
<div class="post-content" itemprop="articleBody">
<p>Today, ~1.5 years after release <a href="2019-12-12-release-announcement-100.html">1.0.0</a>, the Eclipse Ditto team is happy to
announce the availability of Eclipse Ditto <a href="https://projects.eclipse.org/projects/iot.ditto/releases/2.0.0">2.0.0</a>.</p>
<p>With the major version 2.0.0 the Ditto team removed technical debt and ended support for APIs which were deprecated
long ago in order to have a better maintainable codebase. However some awesome new features are included as well.</p>
<h2 id="adoption">Adoption</h2>
<p>Companies are willing to show their adoption of Eclipse Ditto publicly: <a href="https://iot.eclipse.org/adopters/?#iot.ditto">https://iot.eclipse.org/adopters/?#iot.ditto</a></p>
<p>From our various <a href="feedback.html">feedback channels</a> we however know of more adoption.<br />
If you are making use of Eclipse Ditto, it would be great to show this by adding your company name to that list of
known adopters.<br />
In the end, that’s one main way of measuring the success of the project.</p>
<h2 id="changelog">Changelog</h2>
<p>The main improvements and additions of Ditto 2.0.0 are:</p>
<ul>
<li>Merge/PATCH updates of digital twins</li>
<li>Configurable OpenID Connect / OAuth2.0 claim extraction to be used for authorization</li>
<li>Establishing connections to endpoints (via AMQP, MQTT, HTTP) utilizing a Ditto managed SSH tunnel</li>
<li>Addition of a DevOps API in order to retrieve all known connections</li>
<li>Expiring policy subjects + publishing of announcement message prior to expiry</li>
<li>Addition of policy actions in order to inject a policy subject based on a provided JWT</li>
<li>Built-in acknowledgement for search updates to have the option of twin updates with strong consistency of the search index</li>
<li>Restoring active connection faster after a hard restart of the Ditto cluster via automatic prioritization of connections</li>
<li>Support for LastWill/Testament + retain flag for MQTT connections</li>
</ul>
<p>The step to a major version was done because of the following breaking API changes:</p>
<ul>
<li>Removal of “API version 1” (deprecated in <a href="release_notes_110.html#deprecations">Ditto 1.1.0</a>)
from Ditto’s Java APIs + HTTP API</li>
<li>Removal of code in Java APIs marked as <code class="language-plaintext highlighter-rouge">@Deprecated</code></li>
<li>Binary incompatible changes to Java APIs</li>
<li>Restructuring of Ditto’s Maven modules in order to simplify/ease further development</li>
</ul>
<p>The following non-functional enhancements are also included:</p>
<ul>
<li>Improvement of stability during rolling updates</li>
<li>Addition of sharding concept for Ditto internal pub/sub enabling connection of e.g. tens of thousands Websocket sessions</li>
<li>Background cleanup improvements in order to have less impact on DB roundtrip times</li>
<li>Update of third party libraries (e.g. Pekko)</li>
<li>Documentation of deployment via K3S</li>
</ul>
<p>Please have a look at the <a href="release_notes_200.html">2.0.0 release notes</a> for a more detailed information on the release.</p>
<h2 id="artifacts">Artifacts</h2>
<p>The new Java artifacts have been published at the <a href="https://repo.eclipse.org/content/repositories/ditto/">Eclipse Maven repository</a>
as well as <a href="https://repo1.maven.org/maven2/org/eclipse/ditto/">Maven central</a>.</p>
<p>The Ditto JavaScript client release was published on <a href="https://www.npmjs.com/~eclipse_ditto">npmjs.com</a>:</p>
<ul>
<li><a href="https://www.npmjs.com/package/@eclipse-ditto/ditto-javascript-client-dom">@eclipse-ditto/ditto-javascript-client-dom</a></li>
<li><a href="https://www.npmjs.com/package/@eclipse-ditto/ditto-javascript-client-node">@eclipse-ditto/ditto-javascript-client-node</a></li>
</ul>
<p>The Docker images have been pushed to Docker Hub:</p>
<ul>
<li><a href="https://hub.docker.com/r/eclipse/ditto-policies/">eclipse/ditto-policies</a></li>
<li><a href="https://hub.docker.com/r/eclipse/ditto-things/">eclipse/ditto-things</a></li>
<li><a href="https://hub.docker.com/r/eclipse/ditto-things-search/">eclipse/ditto-things-search</a></li>
<li><a href="https://hub.docker.com/r/eclipse/ditto-gateway/">eclipse/ditto-gateway</a></li>
<li><a href="https://hub.docker.com/r/eclipse/ditto-connectivity/">eclipse/ditto-connectivity</a></li>
<li><a href="https://hub.docker.com/r/eclipse/ditto-concierge/">eclipse/ditto-concierge</a></li>
</ul>
<p><br />
<br /></p>
<figure><img class="docimage" src="images/ditto.svg" alt="Ditto" style="max-width: 500px" /></figure>
<p>–<br />
The Eclipse Ditto team</p>
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