On Oct 13, 2008, at 11:11 AM, Juan David wrote:
Hi David
I think what I need is descrived for you “If you need some code to
execute
before your actual apps start you could write a gbean to execute the
code
and deploy it in a plugin that depends on the tomcat plugin. If
your apps
depend on this service plugin it is sure to get started before the
apps.” I
would just get the code out of the servlet and put on a gbean , what
I would
need is a example of the gbean implementation and deployment if
there is one
available.
A simple example of a gbean is (in the geronimo 2.1 branch) at plugins/
clustering/geronimo-farm/src/main/java/org/apache/geronimo/farm/config/
BasicClusterInfo.java
You can view it at
https://svn.apache.org/repos/asf/geronimo/server/branches/2.1/plugins/clustering/geronimo-farm/src/main/java/org/apache/geronimo/farm/config/BasicClusterInfo.java
This one uses constructor dependency injection. The important points
to note are:
- you can use constructor or setter dependency injection
- dependencies can be simple objects (strings, numbers, or something
you provide a PropertyEditor for) via "attributes" or other gbeans via
"references"
- references can be single valued in which case they are required or
collection-valued in which case they are optional and gbeans that
satisfy the criteria are added as they start.
- you have to provide meatadata for the gbean as GBeanInfo, as shown
at the end of the class
- there are a few special attributes such as the plugin classloader
and the geronimo kernel
- if you need to do something on shutdown your gbean can implement the
GBeanLifecycle interface.
The plan using this gbean is
https://svn.apache.org/repos/asf/geronimo/server/branches/2.1/plugins/clustering/farming/src/main/plan/plan.xml
This particular gbean has this configuration:
<gbean name="ClusterInfo"
class="org.apache.geronimo.farm.config.BasicClusterInfo">
<attribute name="name">${PlanClusterName}</attribute>
<reference name="NodeInfos"></reference>
</gbean>
This particular attribute is overridden in a config.xml fragment and
eventually the value comes from a property in var/config/config-
substitutions.properties however you probably wont need such
customization features for your first gbean.
The reference is blank which means that any gbean implementing the
NodeInfo interface specified in the GBeanInfo for BasicClusterInfo
will be added to the NodeInfos collection.
hope this helps, please ask questions as needed
david jencks
Thank you very much
djencks wrote:
On Oct 13, 2008, at 9:50 AM, Juan David wrote:
Hi All
I have a problem to set up a framework application on Geronimo. I
need a
Servlet to be started when the web container is starting.
As I previously did this configuration on Tomcat y try to add the
Servlet
definition on installDir\var\catalina\conf\web.xml and it loads the
Servlet
the problem is that the servlet has dependency classes and does not
found
them on runtime. I try to add the jar containing the classes to
installDir\var\shared\lib and did not work.
What is the right way to accomplish this?
Is there a default application like in OAS or Tomcat?
Do I have to add my own module to Geronimo (If so can you give me
some
directions?)
The stack trace says that the class can not be found on
Tomcat6/2.0.1/car do
I have to add the dependence on that module for the dependent jars?
(how can
I do that?)
Module 14/37 org.apache.geronimo.configs/tomcat6/2.0.1/car
13:59:43,750 ERROR [Digester] End event threw exception
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
….
Caused by:
java.lang.RuntimeException:
suramericana.swb.environment.InitContainerProperties in classloader
org.apache.geronimo.configs/tomcat6/2.0.1/car
at
org
.apache
.geronimo
.tomcat
.GeronimoStandardContext.addChild(GeronimoStandardContext.java:267)
... 71 more
Caused by:
java.lang.ClassNotFoundException:
suramericana.swb.environment.InitContainerProperties in classloader
org.apache.geronimo.configs/tomcat6/2.0.1/car
What exactly are you trying to accomplish with this servlet? There
may be a better way to do this in geronimo.
I can't keep track of how tomcat starts. There might be a default
application with a configuration under var/tomcat.
If this default application actually exists and you decide adding
your
servlet to it is the best way to proceed then the most controllable
way to proceed is to build a replacement tomcat plugin that includes
your jar as an additional dependency. You should upgrade to g. 2.1.3
and copy the source plugins/tomcat/tomcat6 module, alter the
artifactId, include your jar as a maven dependency, and add an
artifact-alias so your tomcat assembly will replace the normal one.
If you need some code to execute before your actual apps start you
could write a gbean to execute the code and deploy it in a plugin
that
depends on the tomcat plugin. If your apps depend on this service
plugin it is sure to get started before the apps.
If you need this code to execute before any connectors start you
might
be able to include it in one of the apps and use the techniques shown
in the app-per-port sample to start the connectors after your app.
thanks
david jencks
Thanks in advance
JuanDa
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