<s>
Tortuga	B-Application
is	O
a	O
software	O
framework	O
for	O
discrete	B-General_Concept
event	I-General_Concept
simulation	I-General_Concept
in	O
Java	B-Language
.	O
</s>
<s>
A	O
Tortuga	B-Application
simulation	O
can	O
be	O
written	O
either	O
as	O
interacting	O
processes	O
or	O
as	O
scheduled	O
events	O
.	O
</s>
<s>
A	O
Tortuga	B-Application
simulation	O
can	O
have	O
thousands	O
of	O
entities	O
,	O
and	O
can	O
be	O
part	O
of	O
a	O
larger	O
Java	B-Language
system	O
.	O
</s>
<s>
Tortuga	B-Application
as	O
an	O
open	O
source	O
project	O
under	O
the	O
Lesser	B-Application
General	I-Application
Public	I-Application
License	I-Application
,	O
version	O
2.1	O
(	O
LGPLv2.1	B-Application
)	O
.	O
</s>
<s>
Tortuga	B-Application
meets	O
the	O
licensing	O
requirements	O
by	O
providing	O
all	O
source	O
code	O
and	O
binary	O
executables	O
available	O
for	O
download	O
at	O
the	O
primary	O
website	O
listed	O
in	O
the	O
"	O
external	O
links	O
"	O
section	O
below	O
.	O
</s>
<s>
Tortuga	B-Application
simulations	O
run	O
on	O
Microsoft	B-Application
Windows	I-Application
XP	I-Application
and	O
Windows	B-Application
Vista	I-Application
as	O
well	O
as	O
on	O
Linux	B-Application
,	O
macOS	B-Application
,	O
BSD	B-Operating_System
and	O
Unix	B-Application
.	O
</s>
<s>
As	O
part	O
of	O
its	O
support	O
for	O
simulation	O
,	O
Tortuga	B-Application
employs	O
tools	O
from	O
aspect-oriented	O
programming	O
,	O
or	O
AOP	O
.	O
</s>
<s>
You	O
need	O
not	O
be	O
familiar	O
with	O
AOP	O
to	O
use	O
Tortuga	B-Application
:	O
your	O
simulation	O
classes	O
are	O
written	O
in	O
standard	O
Java	B-Language
.	O
</s>
<s>
However	O
,	O
the	O
use	O
of	O
AOP	O
in	O
Tortuga	B-Application
requires	O
more	O
elaborate	O
compilation	O
that	O
mere	O
javac	O
.	O
</s>
<s>
This	O
has	O
been	O
wrapped	O
up	O
in	O
an	O
Ant	B-Application
task	O
included	O
in	O
tortuga.jar	O
.	O
</s>
<s>
This	O
task	O
is	O
the	O
reason	O
it	O
is	O
assumed	O
Tortuga-based	O
simulations	O
are	O
using	O
Ant	B-Application
to	O
build	O
.	O
</s>
<s>
Tortuga	B-Application
utilizes	O
a	O
programming	O
paradigm	O
that	O
greatly	O
reduces	O
the	O
burden	O
on	O
the	O
simulation	O
on	O
developer	O
.	O
</s>
<s>
Tortuga	B-Application
treats	O
each	O
simulation	O
entity	O
as	O
a	O
separate	O
thread	O
and	O
allows	O
the	O
user	O
to	O
specify	O
a	O
run	O
method	O
.	O
</s>
<s>
This	O
means	O
that	O
a	O
Tortuga	B-Application
simulation	O
is	O
inherently	O
limited	O
by	O
the	O
number	O
of	O
threads	O
the	O
JVM	O
is	O
able	O
to	O
support	O
.	O
</s>
<s>
Tortuga	B-Application
was	O
developed	O
by	O
Fred	O
Kuhl	O
and	O
Richard	O
Weatherly	O
of	O
The	O
MITRE	O
Corporation	O
in	O
2004-2006	O
and	O
they	O
continue	O
to	O
maintain	O
it	O
.	O
</s>
