Question about context-param

[Mike Roest]

Hi all,
I'm trying to initialize a few parameters from my web.xml to be available to my context.

I'm just wondering when they become available. As I'm attempting to access them during my Context constructor and I'm getting to following exception trace.

(This call was just trying to get the names not actually access the values but trying to access the values give similar results)

java.lang.NullPointerException
at javax.servlet.GenericServlet.getInitParameterNames(GenericServlet.java:167)
at polaris.servlet.PolarisContext.<init>(PolarisContext.java:54)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:274)
at java.lang.Class.newInstance0(Class.java:296)
at java.lang.Class.newInstance(Class.java:249)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.
java:902)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:821)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:3420)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:3
608)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1188)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:738)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1188)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:347
)
at org.apache.catalina.core.StandardService.start(StandardService.java:4
97)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:218
9)
at org.apache.catalina.startup.Catalina.start(Catalina.java:512)
at org.apache.catalina.startup.Catalina.execute(Catalina.java:400)
at org.apache.catalina.startup.Catalina.process(Catalina.java:180)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:203)

The only thing I can think of is that the context-param isn't accessable until after the context constructor is finished. Which makes it not very helpfull for me.

If anyone has another way of doing this without putting it into a properties file I'm interested.

(The whole point of this is we're trying to migrate our properties to DB tables and need to give the app the DB user and password)

Thanks


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