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From "Marcel Schoen (JIRA)" <j...@apache.org>
Subject [jira] Created: (JEXL-99) Documentation of Thread Safety / Invalid code examples on homepage
Date Wed, 24 Mar 2010 10:26:27 GMT
Documentation of Thread Safety / Invalid code examples on homepage
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                 Key: JEXL-99
                 URL: https://issues.apache.org/jira/browse/JEXL-99
             Project: Commons JEXL
          Issue Type: Task
    Affects Versions: 2.0
            Reporter: Marcel Schoen
            Priority: Minor


I had trouble with a custom method invoked in a JEXL script. This method throws a RuntimeException,
which got swallowed with JEXL 2. Using the debugger, I found the "strict" flag of the Interpreter
to be false, even though I had invoked "JexlEngine.setLenient(false)" in my initialization
code.

Now I suspect my initialization logic to be faulty, but while I looked into this, I realized
that the javadoc of JexlEngine doesn't really tell me if I can use it as a singleton or not
(or if I should, for that matter). If so, are its various methods thread-safe or not? It only
says so for a few methods like "setDebug()".

In addition, some code examples on the homepage are heavily outdated. For example, the first
code fragment on this page

http://commons.apache.org/jexl/reference/examples.html

shows the usage of a class "ExpressionFactory" which doesn't even exist in the JEXL 2 source
tree. Of course it would be nice if these examples would show how to correctly use "JexlEngine",
for instance.

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