Re: [Geotools-gt2-users] Problem with writing to an image in Tomcat

[Andrea A. <aa...@op...>]

Christopher Jon Jursa ha scritto:
> Hello,
> 
> I am attempting to output an image from a LiteRenderer using Geotools
> 2.2-RC3.  

Hem... it seems you're trying to do something that Geoserver already 
does? Have you considered building your app on top of it?

> I have the same problem that was addressed at
> http://www.mail-archive.com/geo...@li.../msg0203
> 1.html.  However, I don't understand the poster's solution.
> 
> I am recieving an odd error.  Upon the following line of code in my servlet
> I recieve a null pointer exception.

Stack trace of the NPE please :-)

> myLiteRenderer.paint((Graphics2D) g, new Rectangle(0,0,w,h), new
> AffineTransform());
> 
> Also, in my Tomcat command line window, I get the following (first few)
> stack trace exceptions.
> 
> ----------------------------------------------------------------------------
> -
> Nov 28, 2006 8:01:34 PM null createBackingStore
> WARNING: Failed to bind a "jdbc/EPSG" entry.
> javax.naming.NameNotFoundException: Name jdbc is not bound in this Context
>         at org.apache.naming.NamingContext.bind(NamingContext.java:842)
>         at org.apache.naming.NamingContext.bind(NamingContext.java:170)
>         at org.apache.naming.NamingContext.bind(NamingContext.java:186)
>         at org.apache.naming.SelectorContext.bind(SelectorContext.java:170)
>         at javax.naming.InitialContext.bind(Unknown Source)
>         at
> org.geotools.referencing.factory.epsg.DefaultFactory.createFactory(De
> 		faultFactory.java:297)
>         at
> org.geotools.referencing.factory.epsg.DefaultFactory.createBackingSto
> 		re(DefaultFactory.java:328)
>         at
> org.geotools.referencing.factory.DeferredAuthorityFactory.getBackingS
> 		tore(DeferredAuthorityFactory.java:188)
>         at
> org.geotools.referencing.factory.BufferedAuthorityFactory.isReady(Buf
> 		feredAuthorityFactory.java:206)
>         at
> org.geotools.referencing.factory.DeferredAuthorityFactory.isReady(Def
> 		erredAuthorityFactory.java:176)
> ----------------------------------------------------------------------------
> -
> 
> What is the EPSG?  I noticed in my "C:\apache\tomcat\temp" directory, there
> is a Databases\Geotools\HSQL directory with ESPG.script, EPSG.backup,
> EPSG.data and ESPG.properties files.

EPSG information: www.epsg.org
Basically it provides the best database of coordinate systems and map
projections we can find.

> What do I do about this error?  Also, can someone explain to me the solution
> in the link above?

Short term solution is to remove the epsg-hsql module and use epsg-wkt 
instead, so that you don't have jndi issues... A better solution
is to fix the gt2 code, which I do not think has happened so far.

Cheers
Andrea