Hi,
Sorry but my preceding analysis was false : I have a problem but NOT with the
delegate.
So, I reexplain the case :
1- I have
$CATALINA_HOME/common/lib/mysql-connector-java-2.0.14-bin.jar
$CATALINA_HOME/common/lib/naming-factory-dbcp.jar
2- I have a war with
WEB-INF/lib/mysql-connector-java-3.0.15-ga-bin.jar
WEB-INF/lib/naming-factory-dbcp.jar
in my test, I do :
Class driver = Class.forName("org.gjt.mm.mysql.Driver");
URL ressource =
driver.getClassLoader().getResource("org/gjt/mm/mysql/Driver.class");
out.println( "ClassForname==>"+ressource );
If, in my Context element, I put a Loader with delegate=false (the default), it prints :
ClassForname==>jar:file:/usr/local/tomcat/webapps/myContext/WEB-INF/lib/mysql-connector-java-3.0.15-ga-bin.jar!/org/gjt/mm/mysql/Driver.class
If I put delegate=true, it prints :
ClassForname==>jar:file:/usr/local/tomcat/common/lib/mysql-connector-java-2.0.14-bin.jar!/org/gjt/mm/mysql/Driver.class
So delegate works as it is expected.
My problem is that, in my first test, I did :
Context ctx = new InitialContext();
DataSource dataSource = (DataSource)ctx.lookup("java:/comp/env/jdbc/myDB");
URL ressource =
dataSource.getClass().getClassLoader().getResource("org/gjt/mm/mysql/Driver.class");
out.println( "JndiForname==>"+ressource );
and, in this case, I always have :
ClassForname==>jar:file:/usr/local/tomcat/common/lib/mysql-connector-java-2.0.14-bin.jar!/org/gjt/mm/mysql/Driver.class
So, for now, I don't find the solution to use the Driver inside the war :-(
But this is another problem...
Sorry Remy for the bad bug report.
On Wed, 23 Mar 2005 17:26:34 +0100
Lionel Farbos <[EMAIL PROTECTED]> wrote:
Hi Simon,
I wanted to use this flag because, in my $CATALINA_HOME/common/lib,
I have mysql-connector-java-2.0.14-bin.jar
but,
in some wars, I have
WEB-INF/lib/mysql-connector-java-3.0.15-ga-bin.jar
WEB-INF/lib/naming-factory-dbcp.jar
and in other wars, I don't have any Driver Mysql
So, I'd want the war_WEB-INF/lib/<Mysql_jar> to be taken BEFORE the
common/lib/<Mysql_jar> one when it is possible
and
the common/lib/<Mysql_jar> to be taken in other cases.
So I tried to put
<Loader className="org.apache.catalina.loader.WebappLoader" delegate="false" />
or
<Loader className="org.apache.catalina.loader.WebappLoader" delegate="true" />
in my Context.xml
But it is always the common/lib/jar one which is taken :-((
I don't know if it is a bug or a bad config from me ....
If a Tomcat Developer can say to me what I am wrong ...
Note : To confirm the Driver version, I print :
dataSource.getClass().getClassLoader().getResource("org/gjt/mm/mysql/Driver.class");
Cheers
On Sat, 19 Mar 2005 17:44:40 +1300
Simon Kitching <[EMAIL PROTECTED]> wrote:
Hi,
I see here that there is an option for the webapp-specific classloader
to use parent-first classloading instead of the (default) child-first
classloading.
Can someone suggest why this might be useful? Clearly someone thought
so, but I can't see any point in it. It is in catalina since version 1.1
(committer: Remy Maucherat).
See "delegate" option in this page:
http://jakarta.apache.org/tomcat/tomcat-5.0-doc/config/loader.html
Using this option makes life exceedingly complicated for some libs like
commons-beanutils and commons-logging, so I would like to know under
what conditions someone might enable this feature.
Regards,
Simon
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