Hi folks,
here is the code snippet I use with a Struts Plugin to initialize Torque. I tested
with a Tomcat and Bea Weblogic
/**
* Tries to load the Torque configuration file using a file or as a resource via
* classloader
*
* @param servletContext Used to determine the absolute path
* @param fileName The name of the configuration file to use
* @return The Torque configuration file
* @throws IOException Failed to load the Configuration
*/
private Configuration getTorqueConfiguration( ServletContext servletContext, String
fileName )
throws Exception
{
// Do some diagnostic output
this.getLogger().info( "Running on the following servlet container : " +
servletContext.getServerInfo() );
// Handle a missing configuration
if( (fileName == null) || (fileName.length() == 0) )
{
this.getLogger().info( "There was no value for the TORQUE config file defined"
);
fileName = "/WEB-INF/conf/Torque.properties";
}
// Try to load the config file as file from an exploded WAR or
// from the classpath
String tempFileName = servletContext.getRealPath(fileName);
this.getLogger().info( "Using the following configuration file : " + tempFileName
);
if( ( tempFileName != null) )
{
File tempFile = new File( tempFileName );
if( tempFile.exists() )
{
this.getLogger().info( "Try to load the following file using the file
system : " + tempFile.getAbsolutePath() );
return new PropertiesConfiguration( tempFile.getAbsolutePath() );
}
}
this.getLogger().info( "Try to load the following resource using a class loader: "
+ fileName );
return new ClassPropertiesConfiguration( this.getClass(), fileName );
}
-----Original Message-----
From: Gary Shea [mailto:[EMAIL PROTECTED]
Sent: Wednesday, January 28, 2004 10:17 PM
To: Apache Torque Users List
Subject: RE: Web Applications
Sounds like Herr Goeschl has found a way to get commons configuration to
read the properties file directly. Until it's published somewhere,
here's the relevant part of the initialization servlet I use. It's
kinda dumb but doesn't require dealing with class loaders.
I've only used it with Tomcat, but I assume (ulp!) it will work with any
servlet container.
Good luck!
Gary
public void contextInitialized( ServletContextEvent event ) {
ServletContext context = event.getServletContext();
context.log("Initializing Torque ...");
try {
String fileName = context.getInitParameter("torque-properties");
if (fileName == null) {
fileName="WEB-INF/torque.properties";
}
String realPath = context.getRealPath(fileName);
if (realPath != null) {
context.log("Torque properties " + realPath);
Torque.init(realPath);
} else {
InputStream stream = context.getResourceAsStream(fileName);
if (stream == null) {
context.log(
"unable to open torque config file <"
+ fileName
+ "> as resource stream"
);
return;
}
/*
* The Apache configuration project doesn't seem like it
* will work from inside a servlet. I'm probably wrong...
* but anyway, I get the properties the old way, and add the
* contents of the properties to the Configuration object.
* Yeah, this is ugly as sin...
*/
Properties properties = new Properties();
try {
properties.load(stream);
} catch (IOException e) {
context.log(
"Caught IOException loading <" + fileName
+ "> into a Properties object",
e
);
return;
}
Configuration configuration = new PropertiesConfiguration();
Enumeration names = properties.propertyNames();
while (names.hasMoreElements()) {
String name = (String) names.nextElement();
String value = properties.getProperty(name);
configuration.addProperty(name, value);
}
Torque.init(configuration);
}
} catch(Exception e){
context.log("Caught exception: ", e);
}
}
[2004-01-28 10:22 +0100] Goschl,Siegfried ([EMAIL PROTECTED]) wrote:
> Finding the Torque.properties file also depends on your application server. In the
> case of BEA WebLogic I had the same problem with unexploded WAR files. Therefore I
> used the class loading incarnation of commons configuration - I can send you my
> source code to your private mail account
>
> If you have more thing to initialize and manage in as servlet (and have a little bit
> of spare time) you should look at a service framework such as Turbine or Avalaon.
>
> Cheers,
>
> Siegfried Goeschl
>
> -----Original Message-----
> From: Hassan Abolhassani [mailto:[EMAIL PROTECTED]
> Sent: Tuesday, January 27, 2004 7:33 AM
> To: Apache Torque Users List
> Subject: Re: Web Applications
>
>
> >Hey everybody, st00pid newbie here... I've gone through the torque
> >tutorial successfully and experimented a bit beyond it but now I'm
> >trying to use torque in a web application for the first time and have
> >run into some trouble. I'm confused about the Torque.properties file
> >and the init() method. I've placed the Torque.properties file in the
> >root of my .war, in WEB-INF/, WEB-INF/classes, WEB-INF/lib, just about
> >everywhere, but when I call init("Torque.properties") it can't find it.
> > Where is it supposed to live and how do I reference it?
>
> My solution is to have an initializer servlet. It passes a phycial path
> of the properties file to the init(). Attached is a copy of that servlet
> that might be usefull for you.
>
> You need to make it called when the servlet engine is started. To do
> that the following snippet in web.xml of your application will work:
>
> <servlet>
> <servlet-name>initializer</servlet-name>
> <servlet-class>com.utility.Initializer</servlet-class>
>
> <init-param>
> <param-name>log4j-property-file</param-name>
> <param-value>WEB-INF/classes/log4j.properties</param-value>
> </init-param>
>
> <init-param>
> <param-name>torque-property-file</param-name>
> <param-value>WEB-INF/classes/Torque.properties</param-value>
> </init-param>
>
> <load-on-startup>1</load-on-startup>
> </servlet>
>
> Please note that the servlet also initializes log4j, which you may want
> to ignore it.
>
> >Also, do I
> >call init() in each class that uses Torque or do I need to somehow only
> >call it once when the web app is deployed? Sorry if this is a dumb
> >question, but I can't find anything in the docs to help me. Thanks
> >much.
>
> You only need to call init() one time.
>
> --Travis Hanna
>
> ___
>
> Razorfish Japan, Inc.
>
> ���ܥ�ϥå��ˡ��ϥå��� Hassan Abolhassani [Technology network]
> ������ҡ��졼�����ե��å��塦����ѥ�
> [EMAIL PROTECTED]
> Tel:03-5436-9980 Fax:03-5436-9126
>
>
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