BTW it's good to have guava lib in base/lib as explained recently by the (still?) only paid member of the Groovy project (Jochen Theodorou) because of
its persistent collections
<<persistent collection are collections (may or may not implement the Collection interface) which cannot be modified later on. they have nothing to do
with persisting data in a database or on hard disc. They are just more functional structures. Even though you cannot modify them, you can combine the
structure with new elements and get a new structure. So a list+element will create a new list consisting of the old list and the new element. But they
will not just copy over data, they will reuse the internal structure of the old list. A very simple form is that of a filo stack. It can be a simple
linked list of elements and we add the new element in front, letting us to reuse the old list to almost 100% and to create only a very small amount of
new objects. There are of course lists, sets and maps.
So why use them? Unlike unmodifiable made collections in Java, these persistent collections are relatively safe to share between threads with minimal
synchronizations. Also, if you are working with functional idioms they are more fitting the implicit assumptions of the data not being modifiable.
Java collections are in general a bad fit here, since Collections are more or less assumed to be modifiable. pcollections for example tries to bridge
that. In a Java8 world there is of course streams, which are a much better fit in that. >>
Also maybe time to move to Java 8 as Taher reminded us recently. I think I'll
have a look at that again soon...
Jacques
Le 14/10/2015 10:51, jler...@apache.org a écrit :
Author: jleroux
Date: Wed Oct 14 08:51:36 2015
New Revision: 1708560
URL: http://svn.apache.org/viewvc?rev=1708560&view=rev
Log:
Move guava lib from solr/lib/runtime to base/lib to avoid dependency on solr
component, thanks to Vyom for the reminder
Added:
ofbiz/trunk/framework/base/lib/guava-14.0.1.jar
- copied unchanged from r1708559,
ofbiz/trunk/specialpurpose/solr/lib/runtime/guava-14.0.1.jar
Removed:
ofbiz/trunk/specialpurpose/solr/lib/runtime/guava-14.0.1.jar
