<s>
Apache	B-Language
Cayenne	I-Language
is	O
an	O
open	O
source	O
persistence	B-Library
framework	I-Library
licensed	O
under	O
the	O
Apache	O
License	O
,	O
providing	O
object-relational	B-General_Concept
mapping	I-General_Concept
(	O
ORM	O
)	O
and	O
remoting	O
services	O
.	O
</s>
<s>
Cayenne	O
binds	O
one	O
or	O
more	O
database	O
schemas	O
directly	O
to	O
Java	B-Language
objects	O
,	O
managing	O
atomic	B-Operating_System
commit	I-Operating_System
and	O
rollbacks	O
,	O
SQL	B-Language
generation	O
,	O
joins	O
,	O
sequences	O
,	O
and	O
more	O
.	O
</s>
<s>
With	O
Cayenne	O
's	O
Remote	O
Object	O
Persistence	O
,	O
those	O
Java	B-Language
objects	O
can	O
even	O
be	O
persisted	O
out	O
to	O
clients	O
via	O
Web	O
Services	O
.	O
</s>
<s>
Or	O
,	O
with	O
native	O
XML	B-Protocol
serialization	O
,	O
objects	O
can	O
be	O
further	O
persisted	O
to	O
non-Java	O
clients	O
—	O
such	O
as	O
an	O
Ajax-capable	O
browser	O
.	O
</s>
<s>
Cayenne	O
supports	O
database	O
reverse	O
engineering	O
and	O
generation	O
,	O
as	O
well	O
as	O
a	O
Velocity-based	O
class	O
generation	O
engine	O
.	O
</s>
<s>
All	O
of	O
these	O
functions	O
can	O
be	O
controlled	O
directly	O
through	O
the	O
CayenneModeler	B-Language
,	O
a	O
fully	O
functional	O
GUI	B-Application
tool	O
.	O
</s>
<s>
No	O
XML	B-Protocol
-	O
or	O
annotation-based	O
configuration	O
is	O
required	O
.	O
</s>
<s>
An	O
entire	O
database	O
schema	O
can	O
be	O
mapped	O
directly	O
to	O
Java	B-Language
objects	O
quickly	O
,	O
all	O
from	O
the	O
comfort	O
of	O
the	O
GUI-based	O
CayenneModeler	B-Language
.	O
</s>
<s>
Notable	O
milestones	O
in	O
Cayenne	O
's	O
history	O
include	O
the	O
release	O
of	O
Apache	B-Language
Cayenne	I-Language
3.0	O
in	O
May	O
2010	O
and	O
the	O
release	O
of	O
Apache	B-Language
Cayenne	I-Language
3.1	O
in	O
the	O
fall	O
of	O
2014	O
.	O
</s>
