<s>
JOnAS	B-Language
is	O
an	O
open-source	O
implementation	O
of	O
the	O
Java	B-Language
EE	I-Language
application	B-Application
server	I-Application
specification	O
,	O
developed	O
and	O
hosted	O
by	O
the	O
OW2	B-Architecture
consortium	I-Architecture
,	O
having	O
been	O
originally	O
been	O
created	O
by	O
Groupe	O
Bull	O
.	O
</s>
<s>
JOnAS	B-Language
is	O
released	O
under	O
the	O
LGPL	B-Application
2.1	I-Application
open-source	O
license	O
.	O
</s>
<s>
JOnAS	B-Language
5.1	O
is	O
Java	B-Language
EE	I-Language
5	I-Language
certified	O
,	O
as	O
of	O
March	O
17	O
,	O
2009	O
.	O
</s>
<s>
It	O
was	O
the	O
first	O
open-source	O
server	O
certified	O
for	O
free	O
,	O
using	O
a	O
process	O
known	O
as	O
"	O
J2EE	B-Language
scholarship	O
"	O
and	O
established	O
by	O
Sun	O
for	O
non-profit	O
organizations	O
.	O
</s>
<s>
The	O
new	O
JOnAS	B-Language
5	O
architecture	O
is	O
based	O
on	O
top	O
of	O
an	O
OSGi	B-Application
framework	I-Application
which	O
makes	O
the	O
development	O
of	O
dynamic	O
components	O
much	O
easier	O
than	O
before	O
.	O
</s>
<s>
JOnAS	B-Language
5.3	O
is	O
Java	B-Language
EE	I-Language
6	I-Language
certified	O
,	O
but	O
only	O
for	O
the	O
web	O
profile	O
.	O
</s>
<s>
JOnAS	B-Language
has	O
a	O
comparatively	O
clear	O
remote	O
management	O
console	O
,	O
providing	O
easily	O
accessible	O
tools	O
for	O
remote	O
uploading	O
and	O
deploying	O
of	O
the	O
web	O
applications	O
,	O
configuring	O
both	O
secure	O
and	O
ordinary	O
web	O
access	O
ports	O
and	O
managing	O
the	O
user	O
name	O
-	O
password	O
-	O
role	O
datasets	O
.	O
</s>
<s>
From	O
the	O
first	O
impression	O
,	O
the	O
consoles	O
of	O
the	O
comparable	O
open	O
source	O
Java	B-Language
EE	I-Language
servers	O
seem	O
more	O
confusing	O
,	O
with	O
many	O
needed	O
features	O
not	O
immediately	O
visible	O
.	O
</s>
<s>
This	O
is	O
,	O
however	O
,	O
more	O
important	O
in	O
the	O
teaching	O
process	O
,	O
as	O
Java	B-Language
EE	I-Language
servers	O
are	O
not	O
meant	O
to	O
be	O
managed	O
by	O
the	O
unprepared	O
end	O
user	O
.	O
</s>
<s>
JOnAS	B-Language
is	O
an	O
open	O
source	O
Java	B-Language
EE	I-Language
6	I-Language
application	B-Application
server	I-Application
.	O
</s>
<s>
It	O
provides	O
a	O
fully	O
compliant	O
EJB	B-Language
container	I-Language
through	O
EasyBeans	B-Language
and	O
is	O
available	O
with	O
an	O
embedded	O
Tomcat	B-Language
or	O
Jetty	B-Language
web	O
container	O
.	O
</s>
<s>
Any	O
1.6	O
JVM	B-Language
is	O
supported	O
,	O
and	O
the	O
attempts	O
to	O
run	O
on	O
a	O
free	O
stack	O
with	O
GNU	B-Language
Classpath	I-Language
are	O
very	O
promising	O
.	O
</s>
<s>
JOnAS	B-Language
can	O
run	O
on	O
numerous	O
operating	O
systems	O
including	O
Linux	B-Application
,	O
Windows	O
,	O
AIX	B-Application
,	O
many	O
Posix	O
platforms	O
,	O
and	O
others	O
,	O
as	O
long	O
as	O
a	O
suitable	O
JVM	B-Language
is	O
available	O
.	O
</s>
<s>
As	O
of	O
its	O
version	O
5	O
,	O
JOnAS	B-Language
is	O
fully	O
based	O
on	O
the	O
OSGi	B-Application
framework	I-Application
;	O
using	O
either	O
Apache	B-Language
Felix	I-Language
,	O
Eclipse	B-Language
Equinox	I-Language
or	O
Knopflerfish	O
(	O
though	O
the	O
default	O
JOnAS	B-Language
packaging	O
comes	O
with	O
Apache	B-Language
Felix	I-Language
)	O
.	O
</s>
<s>
This	O
means	O
that	O
all	O
JOnAS	B-Language
components	O
are	O
packaged	O
as	O
bundles	O
,	O
for	O
example	O
the	O
full	O
JOnAS	B-Language
profile	O
comes	O
with	O
more	O
than	O
250	O
bundles	O
.	O
</s>
<s>
The	O
service	O
layer	O
is	O
implemented	O
using	O
,	O
therefore	O
most	O
Java-EE-certified	O
JOnAS	B-Language
services	O
(	O
persistence	O
,	O
EJB	B-Language
,	O
resources	O
,	O
...	O
)	O
are	O
directly	O
available	O
as	O
OSGi	B-Application
services	O
to	O
all	O
OSGi	B-Application
bundles	O
deployed	O
on	O
JOnAS	B-Language
.	O
</s>
<s>
The	O
inverse	O
is	O
also	O
true	O
:	O
for	O
example	O
,	O
an	O
EJB3	O
can	O
directly	O
access	O
any	O
number	O
of	O
OSGi	B-Application
services	O
using	O
dynamic	O
injection	O
.	O
</s>
