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2022-01-21-release-announcement-230.html
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<h1 class="post-title" itemprop="name headline">Announcing Eclipse Ditto Release 2.3.0</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="2022-01-21T00:00:00+00:00" itemprop="datePublished">Jan 21, 2022</time> - Tags:
<a href="tag_blog.html">blog</a>
</p>
</header>
<div class="post-content" itemprop="articleBody">
<p>The Eclipse Ditto teams announces availability of Eclipse Ditto <a href="https://projects.eclipse.org/projects/iot.ditto/releases/2.3.0">2.3.0</a>.</p>
<p>It contains mainly new features around the Ditto <a href="protocol-twinlive.html#live">“live” channel</a> which can be used to
directly interact with devices.</p>
<p>Such live commands may now be easily <a href="2021-12-20-http-live-channel.html">created via the HTTP API</a> - and in addition
a conventional API call targeting the persisted <a href="protocol-twinlive.html#twin">twin</a> may now be automatically converted
to a live command, based on a passed <a href="2021-12-22-live-channel-condition.html">live channel condition</a>.</p>
<p>With that, we are proud that we now can provide a really powerful addition to Ditto’s “Digital Twin pattern”:</p>
<ul>
<li>requesting data from an actual device e.g. when it is currently connected/online (based on a <a href="basic-conditional-requests.html#live-channel-condition">live channel condition</a> targeting the online status)</li>
<li>fall back to its last known persisted state
<ul>
<li>if it is currently not online (the condition did not match)</li>
<li>or also as a fallback, if the device does not answer within e.g. 10 seconds</li>
</ul>
</li>
<li>all that within one single API call, including information from which source the data was reported back
<ul>
<li>the “live” device or the persisted “twin”</li>
</ul>
</li>
</ul>
<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 2.3.0 are:</p>
<ul>
<li>HTTP API for “live” commands</li>
<li>Smart channel strategy for live/twin read access</li>
<li>Configurable allowing creation of entities (policies/things) based on namespace and authenticated subjects</li>
<li>Allow using <code class="language-plaintext highlighter-rouge">*</code> as a placeholder for the feature id in selected fields</li>
</ul>
<p>The following notable fixes are included:</p>
<ul>
<li>Fix potential concurrent modification errors when using JavaScript payload mapping and global variables</li>
<li>Fix reconnect backoff for Kafka connections with authentication failures</li>
<li>Fix caching of JWTs in HTTP push connections</li>
<li>Fix potentially unreachable client actors in connections with <code class="language-plaintext highlighter-rouge">clientCount > 1</code></li>
<li>Fix search inconsistencies for very active things during shard relocation (e.g. on rolling updates)</li>
<li>Fix that a Kafka connection with only targets remains “open” even if Kafka broker is not available</li>
<li>Allow usage of absolute domain paths ending with a “.” as Kafka bootstrap servers</li>
<li>Ensure that Ditto pub/sub state is eventually consistent with a guaranteed upper time limit</li>
</ul>
<p>The following non-functional work is also included:</p>
<ul>
<li>Update of several used dependencies</li>
</ul>
<p>Please have a look at the <a href="release_notes_230.html">2.3.0 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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