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Yannick Schaus 0965e5ec24 Revert "Clean up the master branch" 
This reverts commit bad6b47ef9.

Signed-off-by: Yannick Schaus <habpanel@schaus.net>
 		2018-06-14 16:43:24 +02:00
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readme.html Revert "Clean up the master branch" 2018-06-14 16:43:24 +02:00

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          <li><a href="/v2.1/addons/bindings/omnilink1/readme.html">HAI/Leviton Omni and Lumina</a></li>
          
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          <li><a href="/v2.1/addons/bindings/onkyo1/readme.html">Onkyo AV Receiver</a></li>
          
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          <li><a href="/v2.1/addons/bindings/opensprinkler1/readme.html">OpenSprinkler</a></li>
          
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          <li><a href="/v2.1/addons/bindings/powerdoglocalapi1/readme.html">PowerDog Local API</a></li>
          
          <li><a href="/v2.1/addons/bindings/powermax1/readme.html">Visonic Powermax</a></li>
          
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          <li><a href="/v2.1/addons/bindings/pulseaudio1/readme.html">Pulseaudio</a></li>
          
          <li><a href="/v2.1/addons/bindings/rfxcom/readme.html">RFXCOM</a></li>
          
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          <li><a href="/v2.1/addons/bindings/rpircswitch1/readme.html">Raspberry Pi RC Switch</a></li>
          
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          <li><a href="/v2.1/addons/bindings/rwesmarthome1/readme.html">RWE SmartHome</a></li>
          
          <li><a href="/v2.1/addons/bindings/sagercaster1/readme.html">Sager Weathercaster</a></li>
          
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          <li><a href="/v2.1/addons/bindings/samsungac1/readme.html">Samsung Air Conditioner</a></li>
          
          <li><a href="/v2.1/addons/bindings/samsungtv/readme.html">Samsung TV</a></li>
          
          <li><a href="/v2.1/addons/bindings/samsungtv1/readme.html">Samsung TV</a></li>
          
          <li><a href="/v2.1/addons/bindings/sapp1/readme.html">Picnet Sapp</a></li>
          
          <li><a href="/v2.1/addons/bindings/satel1/readme.html">Satel Integra Alarm System</a></li>
          
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          <li><a href="/v2.1/addons/bindings/smarthomatic1/readme.html">Smarthomatic</a></li>
          
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          <li><a href="/v2.1/addons/bindings/souliss1/readme.html">Souliss</a></li>
          
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          <li><a href="/v2.1/addons/bindings/stiebelheatpump1/readme.html">Stiebel Eltron LWZ</a></li>
          
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          <hr />
          
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      <li><a href="/v2.1/../addons/persistence/dynamodb/readme.html">latest version</a></li>
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    <div class="content">
      <!-- Attention authors: Do not edit directly. Please add your changes to the appropriate source repository -->

<h1 id="amazon-dynamodb-persistence">Amazon DynamoDB Persistence</h1>

<p>This service allows you to persist state updates using the <a href="https://aws.amazon.com/dynamodb/">Amazon DynamoDB</a> database. Query functionality is also fully supported.</p>

<p>Features:</p>

<ul>
  <li>Writing/reading information to relational database systems</li>
  <li>Configurable database table names</li>
  <li>Automatic table creation</li>
</ul>

<h2 id="disclaimer">Disclaimer</h2>

<p>This service is provided “AS IS”, and the user takes full responsibility of any charges or damage to Amazon data.</p>

<h2 id="table-of-contents">Table of Contents</h2>

<!-- Using MarkdownTOC plugin for Sublime Text to update the table of contents (TOC) -->
<!-- MarkdownTOC depth=3 autolink=true bracket=round -->

<ul>
  <li><a href="#prerequisites">Prerequisites</a>
    <ul>
      <li><a href="#setting-up-an-amazon-account">Setting Up an Amazon Account</a></li>
    </ul>
  </li>
  <li><a href="#configuration">Configuration</a>
    <ul>
      <li><a href="#basic-configuration">Basic configuration</a></li>
      <li><a href="#configuration-using-credentials-file">Configuration Using Credentials File</a></li>
      <li><a href="#advanced-configuration">Advanced Configuration</a></li>
    </ul>
  </li>
  <li><a href="#details">Details</a>
    <ul>
      <li><a href="#tables-creation">Tables Creation</a></li>
      <li><a href="#caveats">Caveats</a></li>
    </ul>
  </li>
  <li><a href="#developer-notes">Developer Notes</a>
    <ul>
      <li><a href="#updating-amazon-sdk">Updating Amazon SDK</a></li>
    </ul>
  </li>
</ul>

<!-- /MarkdownTOC -->

<h2 id="prerequisites">Prerequisites</h2>

<p>You must first set up an Amazon account as described below.</p>

<p>Users are recommended to familiarize themselves with AWS pricing before using this service.  Please note that there might be charges from Amazon when using this service to query/store data to DynamoDB. See <a href="https://aws.amazon.com/dynamodb/pricing/">Amazon DynamoDB pricing pages</a> for more details. Please also note possible <a href="https://aws.amazon.com/free/">Free Tier</a> benefits.</p>

<h3 id="setting-up-an-amazon-account">Setting Up an Amazon Account</h3>

<ul>
  <li><a href="https://aws.amazon.com/">Sign up</a> for Amazon AWS.</li>
  <li>Select the AWS region in the <a href="https://console.aws.amazon.com/">AWS console</a> using <a href="https://docs.aws.amazon.com/awsconsolehelpdocs/latest/gsg/getting-started.html#select-region">these instructions</a>. Note the region identifier in the URL (e.g. <code class="highlighter-rouge">https://eu-west-1.console.aws.amazon.com/console/home?region=eu-west-1</code> means that region id is <code class="highlighter-rouge">eu-west-1</code>).</li>
  <li><strong>Create user for openHAB with IAM</strong>
    <ul>
      <li>Open Services -&gt; IAM -&gt; Users -&gt; Create new Users. Enter <code class="highlighter-rouge">openhab</code> to <em>User names</em>, keep <em>Generate an access key for each user</em> checked, and finally click <em>Create</em>.</li>
      <li><em>Show User Security Credentials</em> and record the keys displayed</li>
    </ul>
  </li>
  <li><strong>Configure user policy to have access for dynamodb</strong>
    <ul>
      <li>Open Services -&gt; IAM -&gt; Policies</li>
      <li>Check <em>AmazonDynamoDBFullAccess</em> and click <em>Policy actions</em> -&gt; <em>Attach</em></li>
      <li>Check the user created in step 2 and click <em>Attach policy</em></li>
    </ul>
  </li>
</ul>

<h2 id="configuration">Configuration</h2>

<p>This service can be configured in the file <code class="highlighter-rouge">services/dynamodb.cfg</code>.</p>

<h3 id="basic-configuration">Basic configuration</h3>

<table>
  <thead>
    <tr>
      <th>Property</th>
      <th>Default</th>
      <th style="text-align: center">Required</th>
      <th>Description</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>accessKey</td>
      <td> </td>
      <td style="text-align: center">Yes</td>
      <td>access key as shown in <a href="#setting-up-amazon-account">Setting up Amazon account</a>.</td>
    </tr>
    <tr>
      <td>secretKey</td>
      <td> </td>
      <td style="text-align: center">Yes</td>
      <td>secret key as shown in <a href="#setting-up-amazon-account">Setting up Amazon account</a>.</td>
    </tr>
    <tr>
      <td>region</td>
      <td> </td>
      <td style="text-align: center">Yes</td>
      <td>AWS region ID as described in <a href="#setting-up-amazon-account">Setting up Amazon account</a>. The region needs to match the region that was used to create the user.</td>
    </tr>
  </tbody>
</table>

<h3 id="configuration-using-credentials-file">Configuration Using Credentials File</h3>

<p>Alternatively, instead of specifying <code class="highlighter-rouge">accessKey</code> and <code class="highlighter-rouge">secretKey</code>, one can configure a configuration profile file.</p>

<table>
  <thead>
    <tr>
      <th>Property</th>
      <th>Default</th>
      <th style="text-align: center">Required</th>
      <th>Description</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>profilesConfigFile</td>
      <td> </td>
      <td style="text-align: center">Yes</td>
      <td>path to the credentials file.  For example, <code class="highlighter-rouge">/etc/openhab2/aws_creds</code>. Please note that the user that runs openHAB must have approriate read rights to the credential file. For more details on the Amazon credential file format, see <a href="https://docs.aws.amazon.com/cli/latest/userguide/cli-chap-getting-started.html">Amazon documentation</a>.</td>
    </tr>
    <tr>
      <td>profile</td>
      <td> </td>
      <td style="text-align: center">Yes</td>
      <td>name of the profile to use</td>
    </tr>
    <tr>
      <td>region</td>
      <td> </td>
      <td style="text-align: center">Yes</td>
      <td>AWS region ID as described in Step 2 in <a href="#setting-up-amazon-account">Setting up Amazon account</a>. The region needs to match the region that was used to create the user.</td>
    </tr>
  </tbody>
</table>

<p>Example of service configuration file (<code class="highlighter-rouge">services/dynamodb.cfg</code>):</p>

<div class="language-ini highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="py">profilesConfigFile</span><span class="p">=</span><span class="s">/etc/openhab2/aws_creds</span>
<span class="py">profile</span><span class="p">=</span><span class="s">fooprofile</span>
<span class="py">region</span><span class="p">=</span><span class="s">eu-west-1</span>
</code></pre></div></div>

<p>Example of credentials file (<code class="highlighter-rouge">/etc/openhab2/aws_creds</code>):</p>

<div class="language-ini highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nn">[fooprofile]</span>
<span class="py">aws_access_key_id</span><span class="p">=</span><span class="s">testAccessKey</span>
<span class="py">aws_secret_access_key</span><span class="p">=</span><span class="s">testSecretKey</span>
</code></pre></div></div>

<h3 id="advanced-configuration">Advanced Configuration</h3>

<p>In addition to the configuration properties above, the following are also available:</p>

<table>
  <thead>
    <tr>
      <th>Property</th>
      <th>Default</th>
      <th style="text-align: center">Required</th>
      <th>Description</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>readCapacityUnits</td>
      <td>1</td>
      <td style="text-align: center">No</td>
      <td>read capacity for the created tables</td>
    </tr>
    <tr>
      <td>writeCapacityUnits</td>
      <td>1</td>
      <td style="text-align: center">No</td>
      <td>write capacity for the created tables</td>
    </tr>
    <tr>
      <td>tablePrefix</td>
      <td><code class="highlighter-rouge">openhab-</code></td>
      <td style="text-align: center">No</td>
      <td>table prefix used in the name of created tables</td>
    </tr>
  </tbody>
</table>

<p>Refer to Amazon documentation on <a href="https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/HowItWorks.ProvisionedThroughput.html">provisioned throughput</a> for details on read/write capacity.</p>

<p>All item- and event-related configuration is done in the file <code class="highlighter-rouge">persistence/dynamodb.persist</code>.</p>

<h2 id="details">Details</h2>

<h3 id="tables-creation">Tables Creation</h3>

<p>When an item is persisted via this service, a table is created (if necessary). Currently, the service will create at most two tables for different item types. The tables will be named <code class="highlighter-rouge">&lt;prefix&gt;&lt;item-type&gt;</code>, where <code class="highlighter-rouge">&lt;prefix&gt;</code> matches the <code class="highlighter-rouge">tablePrefix</code> configuration property; while the <code class="highlighter-rouge">&lt;item-type&gt;</code> is either <code class="highlighter-rouge">bigdecimal</code> (numeric items) or <code class="highlighter-rouge">string</code> (string and complex items).</p>

<p>Each table will have three columns: <code class="highlighter-rouge">itemname</code> (item name), <code class="highlighter-rouge">timeutc</code> (in ISO 8601 format with millisecond accuracy), and <code class="highlighter-rouge">itemstate</code> (either a number or string representing item state).</p>

<h3 id="caveats">Caveats</h3>

<p>When the tables are created, the read/write capacity is configured according to configuration. However, the service does not modify the capacity of existing tables. As a workaround, you can modify the read/write capacity of existing tables using the <a href="https://aws.amazon.com/console/">Amazon console</a>.</p>

<h2 id="developer-notes">Developer Notes</h2>

<h3 id="updating-amazon-sdk">Updating Amazon SDK</h3>

<ol>
  <li>Clean <code class="highlighter-rouge">lib/*</code></li>
  <li>Update SDK version in <code class="highlighter-rouge">scripts/fetch_sdk_pom.xml</code>. You can use the <a href="https://mvnrepository.com/artifact/com.amazonaws/aws-java-sdk-dynamodb">maven online repository browser</a> to find the latest version available online.</li>
  <li><code class="highlighter-rouge">scripts/fetch_sdk.sh</code></li>
  <li>Copy <code class="highlighter-rouge">scripts/target/site/dependencies.html</code> and <code class="highlighter-rouge">scripts/target/dependency/*.jar</code> to <code class="highlighter-rouge">lib/</code></li>
  <li>Generate <code class="highlighter-rouge">build.properties</code> entries
<code class="highlighter-rouge">ls lib/*.jar | python -c "import sys; print('  ' + ',\\\\\\n  '.join(map(str.strip, sys.stdin.readlines())))"</code></li>
  <li>Generate <code class="highlighter-rouge">META-INF/MANIFEST.MF</code> <code class="highlighter-rouge">Bundle-ClassPath</code> entries
<code class="highlighter-rouge">ls lib/*.jar | python -c "import sys; print('  ' + ',\\n  '.join(map(str.strip, sys.stdin.readlines())))"</code></li>
  <li>Generate <code class="highlighter-rouge">.classpath</code> entries
<code class="highlighter-rouge">ls lib/*.jar | python -c "import sys;pre='&lt;classpathentry exported=\"true\" kind=\"lib\" path=\"';post='\"/&gt;'; print('\\t' + pre + (post + '\\n\\t' + pre).join(map(str.strip, sys.stdin.readlines())) + post)"</code></li>
</ol>

    </div>
  </div>
</section>






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