<s>
RabbitMQ	B-Application
is	O
an	O
open-source	O
message-broker	B-General_Concept
software	O
(	O
sometimes	O
called	O
message-oriented	B-Application
middleware	I-Application
)	O
that	O
originally	O
implemented	O
the	O
Advanced	B-Operating_System
Message	I-Operating_System
Queuing	I-Operating_System
Protocol	I-Operating_System
(	O
AMQP	B-Operating_System
)	O
and	O
has	O
since	O
been	O
extended	O
with	O
a	O
plug-in	B-Application
architecture	I-Application
to	O
support	O
Streaming	B-Application
Text	I-Application
Oriented	I-Application
Messaging	I-Application
Protocol	I-Application
(	O
STOMP	B-Application
)	O
,	O
MQ	B-Application
Telemetry	I-Application
Transport	I-Application
(	O
MQTT	B-Application
)	O
,	O
and	O
other	O
protocols	O
.	O
</s>
<s>
Written	O
in	O
Erlang	B-Operating_System
,	O
the	O
RabbitMQ	B-Application
server	O
is	O
built	O
on	O
the	O
Open	B-Language
Telecom	I-Language
Platform	I-Language
framework	O
for	O
clustering	O
and	O
failover	O
.	O
</s>
<s>
The	O
source	O
code	O
is	O
released	O
under	O
the	O
Mozilla	B-License
Public	I-License
License	I-License
.	O
</s>
<s>
Originally	O
developed	O
by	O
Rabbit	O
Technologies	O
Ltd	O
.	O
which	O
started	O
as	O
a	O
joint	O
venture	O
between	O
LShift	O
and	O
CohesiveFT	O
in	O
2007	O
,	O
RabbitMQ	B-Application
was	O
acquired	O
in	O
April	O
2010	O
by	O
SpringSource	B-Application
,	O
a	O
division	O
of	O
VMware	O
.	O
</s>
<s>
AMQP	B-Operating_System
client	O
libraries	O
for	O
Java	B-Language
,	O
.NET	B-Application
Framework	I-Application
and	O
Erlang	B-Operating_System
.	O
</s>
<s>
(	O
AMQP	B-Operating_System
clients	O
for	O
other	O
languages	O
are	O
available	O
from	O
other	O
vendors	O
.	O
)	O
</s>
<s>
A	O
plug-in	B-Application
platform	O
for	O
extensibility	O
,	O
with	O
a	O
predefined	O
collection	O
of	O
supported	O
plug-ins	B-Application
,	O
including	O
:	O
</s>
<s>
A	O
"	O
Shovel	O
"	O
plug-in	B-Application
that	O
takes	O
care	O
of	O
moving	O
or	O
copying	O
(	O
replicating	O
)	O
messages	O
from	O
one	O
broker	O
to	O
another	O
.	O
</s>
<s>
A	O
"	O
Federation	O
"	O
plug-in	B-Application
that	O
enables	O
efficient	O
sharing	O
of	O
messages	O
between	O
brokers	O
(	O
at	O
the	O
exchange	O
level	O
)	O
.	O
</s>
<s>
A	O
"	O
Management	O
"	O
plug-in	B-Application
that	O
enables	O
monitoring	O
and	O
control	O
of	O
brokers	O
and	O
clusters	O
of	O
brokers	O
.	O
</s>
<s>
This	O
section	O
gives	O
sample	O
programs	O
written	O
in	O
Python	B-Language
(	O
using	O
the	O
pika	O
package	O
)	O
for	O
sending	O
and	O
receiving	O
messages	O
using	O
a	O
queue	O
.	O
</s>
