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2023-10-17-release-announcement-340.html
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<h1 class="post-title" itemprop="name headline">Announcing Eclipse Ditto Release 3.4.0</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="2023-10-17T00:00:00+00:00" itemprop="datePublished">Oct 17, 2023</time> - Tags:
<a href="tag_blog.html">blog</a>
</p>
</header>
<div class="post-content" itemprop="articleBody">
<p>The Eclipse Ditto teams is proud to announce the availability of Eclipse Ditto
<a href="https://projects.eclipse.org/projects/iot.ditto/releases/3.4.0">3.4.0</a>.</p>
<p>Version 3.4.0 mainly concentrates on exchanging the use of the <a href="https://akka.io">Akka toolkit</a>
(due to a change in licensing) with its fork <a href="https://pekko.apache.org/">Apache Pekko</a> which remains Apache 2.0 licensed.<br />
Apart from that, several improvements are also included which can be found in the changelog.</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>When you use Eclipse Ditto it would be great to support the project by putting your logo there.</p>
<h2 id="changelog">Changelog</h2>
<p>The main improvements and additions of Ditto 3.4.0 are:</p>
<p>Eclipse Ditto 3.4.0 focuses on the following areas:</p>
<ul>
<li>Supporting <strong>HTTP <code class="language-plaintext highlighter-rouge">POST</code></strong> for performing <strong>searches</strong> with a very <strong>long query</strong></li>
<li>Addition of a <strong>new placeholder</strong> to use <strong>in connections</strong> to use <strong>payload of the thing JSON</strong> e.g. in headers or addresses</li>
<li>New <strong>placeholder functions</strong> for <strong>joining</strong> multiple elements into a single string and doing <strong>URL-encoding and -decoding</strong></li>
<li>Configure <strong>MQTT message expiry interval for published messages</strong> via a header</li>
<li><strong>Reduce patch/merge thing commands</strong> to <strong>modify</strong> only the <strong>actually changed values</strong> with a new option</li>
<li>UI enhancements:
<ul>
<li>Adding sending messages to Things</li>
<li>Made UI (at least navigation bar) responsive for small screen sizes</li>
<li>Increase size of JSON editors in “edit” mode</li>
</ul>
</li>
</ul>
<p>The following non-functional work is also included:</p>
<ul>
<li><strong>Swapping the <a href="https://akka.io">Akka toolkit</a></strong> (because of its switch of license to <a href="https://www.lightbend.com/akka/license-faq">BSL License</a> after Akka v2.6.x)
<strong>with its fork <a href="https://pekko.apache.org/">Apache Pekko</a></strong> which remains Apache 2.0 licensed.</li>
<li>Support for using <strong>AWS DocumentDB</strong> as a replacement for MongoDB</li>
<li>Improve logging by adding the <strong>W3C Trace Context</strong> <code class="language-plaintext highlighter-rouge">traceparent</code> header as MDC field to logs</li>
<li>Adjust handling of special MQTT headers in MQTT 5</li>
<li>Optimize docker files</li>
<li>Migration of Ditto UI to TypeScript</li>
<li>There now is an official <strong><a href="2023-10-09-ditto-benchmark.html">Eclipse Ditto Benchmark</a></strong> which shows how Ditto is able
to scale horizontally and provides some tuning tips</li>
<li>Addition of a <strong>benchmark tooling</strong> to run own Ditto benchmarks</li>
</ul>
<p>The following notable fixes are included:</p>
<ul>
<li>Fixed that failed retrieval of a policy (e.g. after policy change) leads to search index being “emptied out”</li>
<li>Fixed that putting metadata when updating a single scalar value did not work</li>
<li>UI fix, fixing that patching a thing will null values did not reflect that change in the UI</li>
</ul>
<p>Please have a look at the <a href="release_notes_340.html">3.4.0 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>
</ul>
<p>The Ditto Helm chart has been published to Docker Hub:</p>
<ul>
<li><a href="https://hub.docker.com/r/eclipse/ditto/">eclipse/ditto</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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