<s>
BlazeDS	B-Application
is	O
a	O
server-based	O
Java	B-Language
remoting	O
and	O
web	B-Application
messaging	I-Application
technology	I-Application
that	O
allows	O
users	O
to	O
connect	O
to	O
back-end	O
distributed	O
data	O
and	O
push	O
data	O
to	O
Apache	B-Operating_System
Flex	I-Operating_System
and	O
Adobe	B-Operating_System
AIR	I-Operating_System
Rich	O
Internet	O
applications	O
(	O
RIA	O
)	O
.	O
</s>
<s>
Because	O
of	O
its	O
open	O
licensing	O
,	O
BlazeDS	B-Application
is	O
not	O
precluded	O
from	O
being	O
used	O
with	O
other	O
client	O
platforms	O
,	O
such	O
as	O
JavaScript/Ajax	O
.	O
</s>
<s>
Previously	O
available	O
only	O
as	O
part	O
of	O
Adobe	B-Application
LiveCycle	I-Application
Data	O
Services	O
ES	O
,	O
on	O
December	O
13	O
,	O
2007	O
Adobe	O
announced	O
that	O
the	O
technologies	O
included	O
in	O
BlazeDS	B-Application
,	O
along	O
with	O
the	O
Action	B-Protocol
Message	I-Protocol
Format	I-Protocol
specification	O
,	O
were	O
contributed	O
to	O
open	O
source	O
under	O
the	O
GNU	B-Application
Lesser	I-Application
General	I-Application
Public	I-Application
License	I-Application
(	O
LGPL	B-Application
v3	O
)	O
with	O
the	O
source	O
code	O
being	O
available	O
for	O
download	O
from	O
early	O
2008	O
.	O
</s>
<s>
BlazeDS	B-Application
can	O
be	O
downloaded	O
from	O
the	O
official	O
page	O
.	O
</s>
<s>
The	O
Message	O
Service	O
provides	O
a	O
complete	O
publish/subscribe	B-Operating_System
infrastructure	O
allowing	O
Flex	O
clients	O
and	O
the	O
server	O
to	O
exchange	O
messages	O
in	O
real	O
time	O
.	O
</s>
<s>
Remoting	O
allows	O
a	O
Flex	O
application	O
to	O
directly	O
invoke	O
methods	O
of	O
Java	B-Language
objects	O
deployed	O
in	O
an	O
application	O
server	O
.	O
</s>
<s>
BlazeDS	B-Application
applications	O
consist	O
of	O
client-side	O
code	O
and	O
server-side	O
code	O
.	O
</s>
<s>
Server-side	O
code	O
is	O
written	O
in	O
Java	B-Language
and	O
deployed	O
as	O
Java	B-Language
class	O
files	O
or	O
Java	B-Language
Archive	O
(	O
JAR	O
)	O
files	O
.	O
</s>
