Our Hibernate setup works fine in non-GWT projects. I'm using Eclipse
Indigo, Google Suite Plugin 2.5, Google GWT Designer 2.4.2.
The short-short version is that the MysqlConnectionPoolDataSource class
from jetty-env.xml is evidently not getting instantiated, causing the
resource reference from web.xml to fail.
Here are the steps I took and excerpts of files that I think matter.
(Apologies in advance - this is a bit verbose but wanted to be sure my
question is complete and clear.)
My war/WEB-INF/classes/hibernate.cfg.xml includes:
<property name="hibernate.connection.datasource">
*java:comp/env/jdbc/nndb
* </property>
A service class AuthenticateServiceImpl.authenticate(Credentials c) calls
DAOFactory.getDefaultInstance().getCustomerDAO();
The above works fine in my pure tomcat (non-GWT project). But in the GWT
project it fails with:
SEVERE: Could not find datasource: java:comp/env/jdbc/nndb
javax.naming.NameNotFoundException; remaining name 'jdbc/nndb'
So, I added following entry to web.xml:
<resource-ref>
<description>NN Database Connection Pooling</description>
<res-ref-name>*jdbc/nndb*</res-ref-name>
<res-type>*javax.sql.DataSource*</res-type>
<res-auth>Container</res-auth>
<res-sharing-scope>Shareable</res-sharing-scope>
</resource-ref>
and also created CustomJettyLauncher as described
here<http://webtide.intalio.com/2011/08/gwt-and-jndi/>
.
and added Eclipse run config to use it (Run Config Arguments -server
com....CustomJettyLauncher)
This results in:
jetty-6.1.x
[WARN] Configuration problem at <resource-ref><description>NN Database
Connection
Pooling</description><res-ref-name>jdbc/nndb</res-ref-name><res-type>javax.sql.DataSource</res-type><res-auth>Container</res-auth><res-sharing-scope>Shareable</res-sharing-scope></resource-ref>
java.lang.IllegalStateException: Nothing to bind for name *
javax.sql.DataSource/default*
Presumably at this point I need an entry in either the jetty-env.xml or
jetty-web.xml file (which?) defining the resource. I tried jetty-env.xml:
<?xml version="1.0"?> <!DOCTYPE Configure PUBLIC "-//Mort Bay
Consulting//DTD Configure//EN" "http://jetty.mortbay.org/configure.dtd";>
<Configure class="org.mortbay.jetty.webapp.WebAppContext">
<New id="nndb" class="org.mortbay.jetty.plus.naming.Resource">
<Arg>j*dbc/nndb*</Arg>
<Arg> <New
class="com.mysql.jdbc.jdbc2.optional.MysqlConnectionPoolDataSource">
<Set name="Url">jdbc:mysql://*dbserver/dbname*</Set>
<Set name="User">*dbuser*</Set>
<Set name="Password">*dbpasswd*</Set>
</New>
</Arg>
</New>
</Configure>
But the above error (Nothing to bind for name javax.sql.DataSource/default)
remains. Interestingly, if I intentionally bugger up the datasource
classname (e.g.
NOSUCH.com.mysql.jdbc.jdbc2.optional.MysqlConnectionPoolDataSource) there's
no gripe, so it may not even be trying to instantiate that class. (Similar
"tracer" errors for WebAppContext and Resource *DO* produce gripes, so it's
only ConnectionPoolDataSource that it's not trying to instantiate.)
I also tried using a jetty-web.xml file but that is evidently not getting
read at all.
Whew!
Does anyone see what's wrong? Any recommendations would be greatly
appreciated.
Thanks in advance!
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