<s>
Jakarta	B-Language
Connectors	I-Language
(	O
JCA	O
;	O
formerly	O
Java	B-Language
EE	I-Language
Connector	I-Language
Architecture	I-Language
and	O
J2EE	B-Language
Connector	I-Language
Architecture	I-Language
)	O
is	O
a	O
Java	B-Language
programming	I-Language
language	I-Language
tool	O
for	O
connecting	O
application	B-Application
servers	I-Application
and	O
enterprise	B-General_Concept
information	I-General_Concept
systems	I-General_Concept
(	O
EIS	O
)	O
as	O
part	O
of	O
enterprise	B-Architecture
application	I-Architecture
integration	I-Architecture
(	O
EAI	O
)	O
.	O
</s>
<s>
While	O
JDBC	B-Language
is	O
specifically	O
used	O
to	O
connect	O
Java	B-Language
applications	O
to	O
databases	O
,	O
JCA	O
is	O
a	O
more	O
generic	O
architecture	O
for	O
connection	O
to	O
legacy	B-Device
systems	I-Device
.	O
</s>
<s>
JCA	O
was	O
developed	O
under	O
the	O
Java	B-Language
Community	I-Language
Process	I-Language
as	O
JSR	B-Language
16	I-Language
(	O
JCA	O
1.0	O
)	O
,	O
JSR	B-Language
112	I-Language
(	O
JCA	O
1.5	O
)	O
and	O
JSR	O
322	O
(	O
JCA	O
1.6	O
)	O
.	O
</s>
<s>
J2EE	B-Language
Version	O
1.3	O
requires	O
application	B-Application
servers	I-Application
to	O
support	O
JCA	O
Version	O
1.0	O
.	O
</s>
<s>
J2EE	B-Language
Version	O
1.4	O
requires	O
application	B-Application
servers	I-Application
to	O
support	O
JCA	O
Version	O
1.5	O
.	O
</s>
<s>
Java	B-Language
EE	I-Language
Version	O
6	O
requires	O
application	B-Application
servers	I-Application
to	O
support	O
JCA	O
version	O
1.6	O
.	O
</s>
<s>
The	O
Jakarta	O
Connector	O
Architecture	O
defines	O
a	O
standard	O
for	O
connecting	O
a	O
compliant	O
application	B-Application
server	I-Application
to	O
an	O
EIS	O
.	O
</s>
<s>
It	O
defines	O
a	O
standard	O
set	O
of	O
system-level	O
contracts	O
between	O
the	O
Jakarta	B-Language
EE	I-Language
application	B-Application
server	I-Application
and	O
a	O
resource	B-Language
adapter	I-Language
.	O
</s>
<s>
The	O
system	O
contracts	O
defined	O
by	O
Version	O
1.0	O
of	O
the	O
J2EE	B-Language
Connector	I-Language
Architecture	I-Language
are	O
described	O
by	O
the	O
specification	O
as	O
follows	O
:	O
</s>
<s>
Connection	O
management	O
Connection	O
management	O
enables	O
an	O
application	B-Application
server	I-Application
to	O
pool	B-General_Concept
connections	I-General_Concept
to	O
the	O
underlying	O
EIS	O
and	O
enables	O
application	O
components	O
to	O
connect	O
.	O
</s>
<s>
Transaction	O
management	O
Transaction	O
management	O
enables	O
an	O
application	B-Application
server	I-Application
to	O
use	O
a	O
transaction	B-General_Concept
manager	I-General_Concept
to	O
manage	O
transactions	B-General_Concept
across	O
multiple	O
resource	O
managers	O
.	O
</s>
<s>
This	O
contract	O
also	O
supports	O
transactions	B-General_Concept
that	O
are	O
managed	O
internal	O
to	O
an	O
EIS	O
resource	O
manager	O
without	O
the	O
necessity	O
of	O
involving	O
an	O
external	O
transaction	B-General_Concept
manager	I-General_Concept
.	O
</s>
<s>
Life	O
cycle	O
management	O
Life	O
cycle	O
management	O
enables	O
an	O
application	B-Application
server	I-Application
to	O
manage	O
the	O
life	O
cycle	O
of	O
a	O
resource	B-Language
adapter	I-Language
from	O
initiation	O
through	O
upgrades	O
to	O
obsolescence	O
.	O
</s>
<s>
This	O
contract	O
provides	O
a	O
mechanism	O
for	O
the	O
application	B-Application
server	I-Application
to	O
bootstrap	O
a	O
resource	B-Language
adapter	I-Language
instance	O
during	O
its	O
deployment	O
or	O
application	B-Application
server	I-Application
startup	O
,	O
and	O
to	O
notify	O
the	O
resource	B-Language
adapter	I-Language
instance	O
during	O
its	O
withdrawal	O
or	O
during	O
an	O
orderly	O
shutdown	O
.	O
</s>
<s>
Work	O
management	O
Work	O
management	O
enables	O
a	O
resource	B-Language
adapter	I-Language
to	O
do	O
work	O
(	O
monitor	O
network	O
endpoints	O
,	O
invoke	O
application	O
components	O
,	O
and	O
so	O
on	O
)	O
by	O
submitting	O
work	O
instances	O
to	O
an	O
application	B-Application
server	I-Application
for	O
execution	O
.	O
</s>
<s>
The	O
application	B-Application
server	I-Application
dispatches	O
threads	B-Operating_System
to	O
execute	O
submitted	O
work	O
instances	O
.	O
</s>
<s>
This	O
allows	O
a	O
resource	B-Language
adapter	I-Language
to	O
avoid	O
creating	O
or	O
managing	O
threads	B-Operating_System
directly	O
,	O
and	O
allows	O
an	O
application	B-Application
server	I-Application
to	O
efficiently	O
pool	O
threads	B-Operating_System
and	O
have	O
more	O
control	O
over	O
its	O
runtime	O
environment	O
.	O
</s>
<s>
The	O
resource	B-Language
adapter	I-Language
can	O
control	O
the	O
transaction	O
context	O
with	O
which	O
work	O
instances	O
are	O
executed	O
.	O
</s>
<s>
Transaction	O
inflow	O
management	O
Transaction	O
inflow	O
management	O
enables	O
a	O
resource	B-Language
adapter	I-Language
to	O
propagate	O
an	O
imported	O
transaction	O
to	O
an	O
application	B-Application
server	I-Application
.	O
</s>
<s>
This	O
contract	O
also	O
allows	O
a	O
resource	B-Language
adapter	I-Language
to	O
transmit	O
transaction	O
completion	O
and	O
crash	O
recovery	O
calls	O
initiated	O
by	O
an	O
EIS	O
,	O
and	O
ensures	O
that	O
the	O
Atomicity	O
,	O
Consistency	O
,	O
Isolation	O
and	O
Durability	O
(	O
ACID	O
)	O
properties	O
of	O
the	O
imported	O
transaction	O
are	O
preserved	O
.	O
</s>
<s>
Message	O
inflow	O
management	O
Message	O
inflow	O
management	O
enables	O
a	O
resource	B-Language
adapter	I-Language
to	O
asynchronously	O
deliver	O
messages	O
to	O
message	O
endpoints	O
residing	O
in	O
the	O
application	B-Application
server	I-Application
,	O
independent	O
of	O
the	O
specific	O
messaging	O
style	O
,	O
messaging	O
semantics	O
and	O
messaging	O
infrastructure	O
used	O
to	O
deliver	O
messages	O
.	O
</s>
<s>
This	O
contract	O
also	O
serves	O
as	O
the	O
standard	O
message	O
provider	O
pluggability	O
contract	O
that	O
allows	O
a	O
wide	O
range	O
of	O
message	O
providers	O
(	O
Java	B-Language
Message	I-Language
Service	I-Language
(	O
JMS	O
)	O
,	O
Java	B-Library
API	I-Library
for	I-Library
XML	I-Library
Messaging	I-Library
(	O
JAXM	B-Library
)	O
,	O
and	O
so	O
on	O
)	O
to	O
be	O
plugged	O
into	O
any	O
Java	B-Language
EE	I-Language
compatible	O
application	B-Application
server	I-Application
with	O
a	O
resource	B-Language
adapter	I-Language
.	O
</s>
<s>
JCA	O
adapters	O
can	O
be	O
built	O
to	O
integrate	O
with	O
various	O
Enterprise	B-General_Concept
Information	I-General_Concept
System	I-General_Concept
such	O
as	O
Siebel	O
Systems	O
,	O
SAP	B-Application
AG	I-Application
,	O
Great	O
Plains	O
Systems	O
,	O
Oracle	B-Application
Applications	I-Application
,	O
etc	O
.	O
</s>
<s>
Siebel	O
provides	O
API	B-General_Concept
to	O
integrate	O
with	O
various	O
platforms	O
like	O
Java	B-Language
,	O
C++	B-Language
,	O
.NET	B-Application
,	O
Visual	B-Language
Basic	I-Language
,	O
etc	O
.	O
</s>
<s>
For	O
Java	B-Language
it	O
provides	O
an	O
interface	O
called	O
'	O
Java	B-Language
Data	O
Bean	O
 '	O
(	O
JDB	O
)	O
.	O
</s>
<s>
The	O
Siebel	O
adapter	O
provides	O
data	O
access	O
via	O
the	O
JDB	O
API	B-General_Concept
.	O
</s>
<s>
SAP	B-Application
provides	O
an	O
interface	O
for	O
Java	B-Language
called	O
SAP	B-Application
Java	B-Language
Connector	I-Language
(	O
SAP	B-Application
JCo	O
)	O
.	O
</s>
