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From "Schaefer, Dirk Alexander" <dirk.a.schae...@bluewin.ch>
Subject tiles2 crashes (digester)
Date Sun, 19 Aug 2007 14:27:05 GMT
hi all,

i'm new to tiles2 and currently trying hard to get it working within my spring enabled web
actually almost the hole thing is working proper with one exception.

tiles2 crashes while it reads the definitions from the definitionsFile(s) i told it to read
from within the following circumstances:

    1. start the tomcat servlet container.
    2. no request sent to tomcat since startup.
    3. sending multiple request using a web application test application simultaneously.

if i do this, a realy big number of exceptions occurre inside of tomcat. investigating those
exceptions i figured out, that there is a problem when the definitions are getting read from
the xml string held inside tiles. as far as i can see, those definitions are then getting
read using digester. as i can see, reading the definitions is neither synchronized nor is
it using independent instances (thread bounded) of the class it is using for this purpose.

the result is, that the different threads are messing with each other and the process of loading
the definitions crashs.

if i use it the following way, everything works proper:

    1. start the tomcat servlet container.
    2. send one single request to it at least.
    3. send as many request simultanously as the server can handle.

interessting, isn't it?


how i use tiles2:

i do not use any of tiles' servlets, listeners, ... i initialize tiles the programmatical
way by using the spring framework's TilesConfigurer introduced in its version 2.1 m4. in general
it is first setting up servlet initial parameters that are defining the several factory, preparer,
... implementations to use by tiles.

after that it initializes the tiles framework the following way:
public void afterPropertiesSet() throws TilesException {

    TilesContainer container = createTilesContainer(this.servletContext);

    TilesAccess.setContainer(this.servletContext, container);


protected TilesContainer createTilesContainer(ServletContext context) throws TilesException

    ServletContextAdapter adaptedContext = new ServletContextAdapter(new DelegatingServletConfig());

    TilesContainerFactory factory = TilesContainerFactory.getFactory(adaptedContext);

    return factory.createContainer(adaptedContext);


where afterPropertiesSet() is the method which needs to be invoked in order to initialize
tiles. DelegatingServletConfig is a simple inner class of TilesConfigurer which makes the
configurer's settings according to the factory/preparer/... implementations to use by tiles
available as initial servlet property settings.

can anyone confirm that this is a bug within tiles2 or is it just me, who's using tiles the
wrong way?

thx a lot, greez,

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