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Posted to users@tomcat.apache.org by Arttu Tanner <ar...@invian.fi> on 2011/10/02 00:04:31 UTC
Re: Defining JDBC resource and AutoDeploy
Ok, figured it out.
I needed to use InitialContext.lookupLink() instead of
InitialContext.lookup() what I was using before.
Seems obvious now, but I didn't think there would be two similar methods.
I just thought I'll post my solution for further reference. It's
always annoying to find that somebody has the same problem as you, but
then nobody gives the solution...
-Artttu
2011/9/30 Tim Watts <ti...@cliftonfarm.org>:
> Try:
> * conf/Catalina/localhost/mywebapp.xml OR
> * webapps/mywebapp/META-INF/context.xml OR
> * If you put it in GlobalNamingResources then you have to add a
> <Resource-Link> to <Context>. See the Configuration
> documentation.
>
> http://tomcat.apache.org/tomcat-5.5-doc/config/context.html has all the
> details.
>
>
> On Fri, 2011-09-30 at 06:17 +0300, Arttu Tanner wrote:
>> OS: Linux / CentOS / 2.6.18-028stab092.1
>> Tomcat: 5.5.23
>>
>> I have simple XML-RPC -WebApp, that uses MySQL database.
>> Currently I have defined the JDBC resource in server.xml inside the
>> <Host> -tags as follows:
>>
>> <Context docBase="mywebapp" path="/mywebapp" reloadable="true"
>> source="org.eclipse.jst.j2ee.server:mywebapp">
>> <Resource name="jdbc/MyDB"
>> auth="Container"
>> type="javax.sql.DataSource"
>> driverClassName="com.mysql.jdbc.Driver"
>> factory="org.apache.tomcat.dbcp.dbcp.BasicDataSourceFactory"
>> url="jdbc:mysql://server.com:3306/db_name"
>> username="db_username"
>> password="db_password"
>> maxActive="20"
>> maxIdle="10"
>> maxWait="5"
>> validationQuery="SELECT 1"
>> testOnBorrow="TRUE"
>> testWhileIdle="TRUE"
>> timeBetweenEvictionRunsMillis="10000"
>> minEvictableIdleTimeMillis="60000"
>> />
>> </Context>
>>
>> In the WebApp the connection is formed like this:
>>
>> DataSource ds =(DataSource)ctx.lookup("java:comp/env/jdbc/MyDB");
>> Connection conn=ds.getConnection();
>>
>> This works fine, but when resource is defined in server.xml, WebApp
>> AutoDeploy won't work and even the manager application can't undeploy
>> it. If I take the <Context> -element out of the server.xml (and put
>> it elsewhere) AutoDeploy works, but database connections throw:
>> javax.naming.NameNotFoundException: Name jdbc is not bound in this Context
>>
>> I've tried to put the context element in several different files, including:
>> -webapps/mywebapp/WEB-INF/context.xml
>> -context.xml in SERVERROOT/conf/
>> -server.xml, only the <Resource> -tag in <GlobalNamingResources> -element
>>
>> None of these work, and I end up with the same exception.
>>
>> There must be a way to get both the MySQL connection and
>> AutoDeployment at the same time.
>> Can somebody point me to right direction?
>>
>> -Arttu
>>
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>
>
>
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Re: Defining JDBC resource and AutoDeploy
Posted by Christopher Schultz <ch...@christopherschultz.net>.
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Arttu,
On 10/1/2011 6:04 PM, Arttu Tanner wrote:
> Ok, figured it out. I needed to use InitialContext.lookupLink()
> instead of InitialContext.lookup() what I was using before.
That should not be necessary. Here is the code I have been using for
years using MySQL Connector/J and Tomcat 5.5, 6.0, and 7.0:
// dataSourceName looks like java:/comp/env/jdbc/myDataSource
Context context = new InitialContext();
DataSource ds = (DataSource)context.lookup(dataSourceName);
if(null == ds)
throw new NamingException("Found no DataSource for '"
+ dataSourceName + "'");
return ds.getConnection();
It's best to define everything in META-INF/context.xml. Then you don't
need anything anywhere else.
- -chris
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