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| <h1 class="page"><code>persistence.xml</code></h1> |
| <div class="paragraph"> |
| <p>DataNucleus will for itself also and read the <code>META-INF/persistence.xml</code>. |
| In theory it can hold mappings and even connection strings. |
| However, with Apache Isis we tend to use annotations instead and externalize connection strings. so its definition is extremely simply, specifying just the name of the "persistence unit".</p> |
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| <p>Here’s the one provided by the <a href="../../../docs/2.0.0-M3/starters/simpleapp.html" class="page">SimpleApp</a> starter app:</p> |
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| <pre class="highlightjs highlight"><code class="language-xml hljs" data-lang="xml"><?xml version="1.0" encoding="UTF-8" ?> |
| <persistence xmlns="http://java.sun.com/xml/ns/persistence" |
| xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" |
| xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd" version="1.0"> |
| |
| <persistence-unit name="simple"> |
| </persistence-unit> |
| </persistence></code></pre> |
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| <div class="paragraph"> |
| <p>Normally all one needs to do is to change the <code>persistence-unit</code> name.</p> |
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| <div class="paragraph"> |
| <p>If you use Eclipse IDE on Windows then |
| <a href="../../../setupguide/2.0.0-M3/eclipse/about.html#workaround-for-path-limits-the-dn-plugin-to-use-the-persistence-xml" class="page">note the importance</a> of the <code>persistence.xml</code> file to make DataNucleus enhancer work correctly.</p> |
| </div> |
| </td> |
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| </div> |
| <div class="paragraph"> |
| <p>See <a href="http://www.datanucleus.org/products/datanucleus/jdo/persistence.html#persistenceunit">DataNucleus' documentation</a> on <code>persistence.xml</code> to learn more.</p> |
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