We do similar stuff by adding these helper methods to our
ActionBeanContext subclass. Your tag should have enough information
from the page context to call getOrMakeContext(...).
/**
* If an My context has already been set, this will grab it,
otherwise
* this will make a new context.
*/
public static MyActionBeanContext getOrMakeContext(
HttpServletRequest httpRequest, HttpServletResponse httpResponse,
ServletContext servletContext) {
MyActionBeanContext context = MyActionBeanContext
.getContext(httpRequest);
if (context == null) {
context = new MyActionBeanContext();
context.setRequest(httpRequest);
context.setResponse(httpResponse);
context.setServletContext(servletContext);
}
return context;
}
/**
* Retrieves the global context associated with the provideed
request, or null
* if none is set.
*/
public static MyActionBeanContext getContext(ServletRequest
request) {
return (MyActionBeanContext) request
.getAttribute(My_CONTEXT_REQUEST_ATTRIBUTE);
}
@Override
public void setRequest(HttpServletRequest request) {
super.setRequest(request);
if (getContext(request) == null) {
request.setAttribute(My_CONTEXT_REQUEST_ATTRIBUTE, this);
}
}
On May 23, 2009, at 3:45 PM, Mike McNally wrote:
On Sat, 23 May 2009 14:44:27 -0700
Chris Cheshire <[email protected]> wrote:
I have quite a few convenience methods in my action bean context
subclass (eg. that wrap getting init parameters for the web
application) that I want to access from a tag handler class. I can
get
the servlet context and then get the params from that, but the
methods
in the action bean context are more...convenient. Is there any way to
get access to this instance from a tag handler class?
I think that a common way to do this is to either subclass the context
class such that the instances put themselves in a ThreadLocal and
provide a public static access method, or to have an interceptor
do that for the stock class.
--
--
Mike McNally <[email protected]>
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