DO NOT REPLY [Bug 50455] Jasper don't detects changes in jsp file if we load de jsp and after we modify the jsp in the same second

[bu...@apache.org]

https://issues.apache.org/bugzilla/show_bug.cgi?id=50455

--- Comment #1 from Alejandro Anadon <aa...@enforex.es> 2010-12-10 13:22:51 EST ---
(In reply to comment #0)
> If we have a jsp file (not in a war file; just directly in the file system)
> then we first call the jsp; then it is compiled and executed.
> But if after this, the jsp file is modified very very fast (by an external
> process for example), then, jasper does not detect the change and then do not
> recompile the file, and so on, we do not see the change with the first version.
> 
> this is because in the class:
> 
> org/apache/jasper/compiler/Compiler.java
> 
> in the line 442 is like:
> 
> 'if (targetLastModified < jspRealLastModified)'
> 
> Why is the error? because in some systems, the method lastModified or
> getLastModified does not care miliseconds and return units in seconds.
> 
> Then, if we first compile, and after (in the same second) we modify the jsp
> file, as the functions ignores miliseconds units, then jspRealLastModified is
> equals to 
> targetLastModified (BUT IT IS NOT).
> 
> So I think is that the solution is very simple. Change the condition from:
> 
> 'if (targetLastModified < jspRealLastModified)'
> 
> to
> 
> 'if (targetLastModified <= jspRealLastModified)'
> 
> 
> I tried this and it works.


Just only to clarify that when I say 'the method lastModified or
getLastModified does not care miliseconds and return units in seconds' I do not
mean that the funtion returns seconds.. I mean that if the real time is
'1292005037195' it returns '1292005037000' ignoring the 195ms.

(The timestamp of creation of the file, In some file systems does this.)

I tried to be as much clear as it is posible.

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