7 Replies Latest reply on Jan 24, 2020 9:57 PM by rhn-support-rhsilva

Datasource resource injection in JBoss 6 using CDI

mikaelbeermann Apr 1, 2011 10:31 AM

Hi,

I'm building a CDI based project with JBoss 6, but I can't get the injection of datasources to work. If I do a manual JNDI-lookup the datasource is found whitout any problem. Using the @Resouce annotation, the datasource remains null, but there is no exceptions visible in the log file (excapt for a NullPointerException when trying to use the datasource).

This works:

Context context = new InitialContext();

defaultDS = (DataSource) context.lookup("java:MySqlDS");

but this doesn't work:

@Resource(mappedName="java:MySqlDS")

DataSource defaultDS;

and this doesn't work either:

@Resource(name="java:MySqlDS")

DataSource defaultDS;

First I thought it was som kind of naming error, but since no exception shows up, I think it looks more like the @Resource annotation doesn't work at all.

Are there any known conflict with the Resource injectionns in JBoss 6? Does anyout have a clue of what can be wrong?

/Mikael

1. Datasource resource injection in JBoss 6 using CDI

nickarls Apr 3, 2011 8:48 AM (in response to mikaelbeermann)

Can you inject the java:/DefaultDS?
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2. Datasource resource injection in JBoss 6 using CDI

mikaelbeermann Apr 4, 2011 2:20 AM (in response to nickarls)

No, I have exectly the same problem with DefaultDS
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3. Datasource resource injection in JBoss 6 using CDI

nickarls Apr 4, 2011 2:25 AM (in response to mikaelbeermann)

Sounds strange, isn't there supposed to be an exception if injection is attempted and results in null (can't remember)?

Are you picking up the correct @Resource annotation?
Can you inject and other known resource (e.g. JavaMail)?
Can you see @Inject BeanManager bm?
Are you aquiring the class from the server and not doing new() or some other no-no?
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4. Datasource resource injection in JBoss 6 using CDI

jaikiran Apr 4, 2011 2:39 AM (in response to mikaelbeermann)

Also what kind of a class is that, into which you are trying to inject this resource?
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5. Datasource resource injection in JBoss 6 using CDI

mikaelbeermann Apr 4, 2011 3:16 AM (in response to nickarls)

His becomes even stranger! I checked if I could Inject a javamail session, and that wasn't any problem. But after doing that the datasource injection worked as well. I then removed the JavaMail injection. And now it data source works as supposed, which is good, but it would be nice to understand why it failed before.
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6. Datasource resource injection in JBoss 6 using CDI

nickarls Apr 4, 2011 3:22 AM (in response to mikaelbeermann)

Bugs that disappear without a warning have a tendency of re-appearing when you need them the least.

It could of course be a build problem where some old class has been left lingering somewhere...
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7. Re: Datasource resource injection in JBoss 6 using CDI

rhn-support-rhsilva Jan 24, 2020 9:57 PM (in response to mikaelbeermann)

You should use the lookup attribute.

@Resource(lookup="java:MySqlDS")
DataSource defaultDS;
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