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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 26409] New: - Document what to do if an Action doesn't need to be forwarded anywhere in the end?
Date Sun, 25 Jan 2004 07:10:16 GMT
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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=26409

Document what to do if an Action doesn't need to be forwarded anywhere in the end?

           Summary: Document what to do if an Action doesn't need to be
                    forwarded anywhere in the end?
           Product: Struts
           Version: 1.1 Final
          Platform: Other
               URL: http://jakarta.apache.org/struts/userGuide/building_cont
                    roller.html#config
        OS/Version: Other
            Status: NEW
          Severity: Enhancement
          Priority: Other
         Component: Documentation
        AssignedTo: struts-dev@jakarta.apache.org
        ReportedBy: hauser@acm.org


Some actions like the ones displaying an image coming out of a database or
downloading a file do not need to end with a next action or page (I guess the
browser works on them in a thread separate from the main web-page body processing).

The above documentation reference (see URL field) and
http://jakarta.apache.org/struts/api/org/apache/struts/action/ActionMapping.html
don't seem to have a recommendation for this.

This is however a problem because Action.execute() always needs to return an
ActionForward object. As per Bug 26408, this causes an IllegalStateException in
your log which is kind of a false alarm if seriously work on your logs.

Sample core part of the execute() method for illustration:
		response.setContentType(img.getContentType());
		OutputStream out = response.getOutputStream();
		InputStream is = img.getImgStream();

		int c;
		int i = 0;
		while ((c = is.read()) != -1) {
			out.write(c);
			i++;
		}
                return actionMapping.findForward(????);

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