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From Mark Thomas <ma...@apache.org>
Subject Re: [all] Java 5 vs. 6
Date Fri, 10 Feb 2012 15:18:26 GMT
On 10/02/2012 14:41, Ralph Goers wrote:
> In many cases the differences between Java 5 and 6 aren't noticeable.
> If the project doesn't require anything from Java 6, why require it?
> I'm sure there are quite a few places where it is still being used
> despite the end of support.

I think there are several reasons:
- It strikes me as odd to release a new version of a component - such as
pool2 - targeting a version of the JVM that is already effectively obsolete.
- There are some platforms (I am thinking primarily of OSX) where
getting ones hands on a Java 5 implementation requires a fair amount of
jumping through hoops. [1]
- Pool2 feeds dbcp2 and Java6 includes JDBC4 which is not backwards
compatible with JDBC3. DBCP is already jumping through hoops with
1.3/1.4 and targeting Java6 makes DBCP easier
- Something we have seen in Tomcat is JVM bugs not being fixed in older
releases. The fewer older JVM versions we target, the less likely we are
to hit these sorts of bugs. Granted, I haven't seen any of this in
Commons. Yet.

Some of these arguments are pool2 specific but overall, my preference is
for targeting the lowest currently supported version of the JVM unless
there is a compelling argument not to.

Mark


[1] I happened to be using my Mac to work on pool 2 and noticed a whole
bunch of @Override warnings because my Mac doesn't have a Java 5 (mainly
because after the latest OS upgrade I couldn't be bothered to jump
through the hoops yet again(,


> 
> In short, if the project needs features found only in Java 6 then
> make it the minimum, otherwise support Java 5.
> 
> Ralph
> 
> Sent from my iPad
> 
> On Feb 10, 2012, at 5:51 AM, Gary Gregory <garydgregory@gmail.com>
> wrote:
> 
>> Hi All,
>> 
>> [pool2] just went from Java 5 to Java 6 because Java 5 requires
>> paid-for support from Oracle.
>> 
>> How does the ML feel about moving projects that are now on Java 5
>> to Java 6?
>> 
>> Thank you, Gary
>> 
>> -- E-Mail: garydgregory@gmail.com | ggregory@apache.org JUnit in
>> Action, 2nd Ed: <http://goog_1249600977>http://bit.ly/ECvg0 Spring
>> Batch in Action: <http://s.apache.org/HOq>http://bit.ly/bqpbCK 
>> Blog: http://garygregory.wordpress.com Home:
>> http://garygregory.com/ Tweet! http://twitter.com/GaryGregory
> 
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