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From hivolt <edelr...@alumni.cmu.edu>
Subject Re: Specifying the location of the persistence.xml file at runtime
Date Mon, 23 Mar 2009 18:44:39 GMT

Hi Brian,
<br><br>The method 
<br><a href="http://java.sun.com/javaee/5/docs/api/javax/persistence/Persistence.html#createEntityManagerFactory(java.lang.String,%20java.util.Map)"
target="_top" rel="nofollow">createEntityManagerFactory(String persistenceUnitName, Map
properties)</a><br><br>takes a Map as the second argument, rather than a
URL.
<br><br><blockquote class="quote light-black dark-border-color"><div
class="quote light-border-color">
<div class="quote-author" style="font-weight: bold;">Brian H1 wrote:</div>
<div class="quote-message shrinkable-quote">Hi,
<br><br>I'm wondering if I could get some clarification on this method from someone
who's used this? &nbsp;I always seem to get a null back. &nbsp;If I make call this
method 
<br>URL xxx = getClass().getResource(&quot;/META-INF/persistence.xml&quot;);,
I get a valid url that has a fully qualified path to the persistence.xml. &nbsp;But, I
haven't been able to turn around and use that path as the resource in the createEntityManagerFactory
method. &nbsp;Is the string &quot;resource&quot; parameter meant to be a file
path? &nbsp;If not, what?
<br><br>Thanks
<br>Brian
<br><br><br><br><blockquote class="quote light-black dark-border-color"><div
class="quote light-border-color">
<div class="quote-author" style="font-weight: bold;">Patrick Linskey-2 wrote:</div>
<div class="quote-message shrinkable-quote">Hi,
<br><br>There's no portable way to specify a location other than
<br>/META-INF/persistence.xml. However, you could dynamically create a jar
<br>with your persistence.xml in the right location and then create a
<br>ClassLoader with this jar in it.
<br><br>Alternately, you could use the
<br>OpenJPAPersistence.createEntityManagerFactory(String puName, String
<br>rsrc) method.
<br><br>-Patrick
<br><br>On Jan 18, 2008 1:10 AM, zzzz8 &lt;zzzz8@netzero.net&gt; wrote:
<br>&gt;
<br>&gt; Is there any way I can specify the location of the persistence.xml file
at
<br>&gt; runtime for my Java SE JPA app, before I create my entitymanagerfactory?
<br>&gt; There are times when I will not place the persistence.xml in
<br>&gt; META-INF/persistence.xml in my classpath... Or is this not possible? The
<br>&gt; really ugly way would be for me to write a method that reads in the
<br>&gt; properties of the specified persistence.xml config file at runtime - then
<br>&gt; assign it to the properties map when call the static method
<br>&gt; createentitymanagerfactory of the Persistence class - but that's really
ugly
<br>&gt; and probably not portable. Does anyone have any ideas regarding this issue?
<br>&gt; TIA.
<br>&gt; --
<br>&gt; View this message in context: <a href="http://www.nabble.com/Specifying-the-location-of-the-persistence.xml-file-at-runtime-tp14948023p14948023.html"
target="_top" rel="nofollow">http://www.nabble.com/Specifying-the-location-of-the-persistence.xml-file-at-runtime-tp14948023p14948023.html</a><br>&gt;
Sent from the OpenJPA Users mailing list archive at Nabble.com.
<br>&gt;
<br>&gt;
<br><br><br><br>-- 
<br>Patrick Linskey
<br>202 669 5907
</div>
</div></blockquote>
</div>
</div></blockquote>

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