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<p><strong>Heron UI</strong> is a user interface that uses the <a href="heron-architecture#heron-tracker">Heron Tracker</a> to display detailed,
colorful visual representations of topologies, including the
<a href="heron-topology-concepts#logical-plan">logical</a> and <a href="heron-topology-concepts#physical-plan">physical
plan</a> for each topology. Check out
<a href="guides-ui-guide">Heron UI Usage Guide</a> for more information about
various elements that UI exposes.</p>
<h3><a class="anchor" aria-hidden="true" id="building-heron-ui"></a><a href="#building-heron-ui" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Building Heron UI</h3>
<p>Heron uses <a href="http://bazel.io/">bazel</a> for compiling.
<a href="compiling-overview">This page</a> describes how to setup bazel
for heron.</p>
<pre><code class="hljs css language-bash"><span class="hljs-comment"># Build heron-ui</span>
$ bazel build heron/tools/ui/src/python:heron-ui

<span class="hljs-comment"># The location of heron-ui pex executable is</span>
<span class="hljs-comment"># bazel-bin/heron/tools/ui/src/python/heron-ui</span>
<span class="hljs-comment"># To run using default options:</span>
$ ./bazel-bin/heron/tools/ui/src/python/heron-ui
</code></pre>
<p><code>heron-ui</code> is a self executable
<a href="https://pex.readthedocs.io/en/latest/whatispex.html">pex</a> archive.</p>
<h3><a class="anchor" aria-hidden="true" id="heron-ui-args"></a><a href="#heron-ui-args" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Heron UI Args</h3>
<ul>
<li><code>--port</code> - Port to run the heron-ui on. Default port is <code>8889</code>.</li>
<li><code>--tracker-url</code> - The base url for tracker. All the information about the
topologies is fetched from tracker. Default url is <code>http://localhost:8888</code>.</li>
<li><code>--address</code> - Address to listen; Default address is <code>0.0.0.0</code></li>
<li><code>--base-url</code> - The base url path if operating behind proxy; Default is <a href="https://github.com/apache/incubator-heron/blob/master/heron/tools/ui/src/python/main.py#L145"><code>None</code></a></li>
</ul>
<pre><code class="hljs css language-bash">$ heron-ui
<span class="hljs-comment"># is equivalent to</span>
$ heron-ui --port=8889 --tracker-url=http://localhost:8888
</code></pre>
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