<s>
The	O
broker	B-General_Concept
pattern	I-General_Concept
is	O
an	O
architectural	O
pattern	O
that	O
can	O
be	O
used	O
to	O
structure	O
distributed	B-Architecture
software	I-Architecture
systems	O
with	O
decoupled	O
components	O
that	O
interact	O
by	O
remote	B-Operating_System
procedure	I-Operating_System
calls	I-Operating_System
.	O
</s>
<s>
The	O
broker	B-General_Concept
pattern	I-General_Concept
is	O
an	O
architecture	O
pattern	O
that	O
involves	O
the	O
use	O
of	O
an	O
intermediary	O
software	O
entity	O
called	O
"	O
broker	O
"	O
to	O
facilitate	O
communication	O
between	O
two	O
or	O
more	O
software	O
components	O
.	O
</s>
<s>
In	O
the	O
broker	B-General_Concept
pattern	I-General_Concept
,	O
the	O
broker	O
is	O
responsible	O
for	O
receiving	O
messages	O
from	O
one	O
component	O
and	O
forwarding	O
them	O
to	O
the	O
appropriate	O
recipient	O
.	O
</s>
<s>
The	O
broker	B-General_Concept
pattern	I-General_Concept
allows	O
the	O
components	O
to	O
remain	O
decoupled	O
and	O
focused	O
on	O
their	O
own	O
responsibilities	O
,	O
while	O
still	O
being	O
able	O
to	O
communicate	O
and	O
collaborate	O
with	O
other	O
components	O
in	O
the	O
system	O
.	O
</s>
<s>
There	O
is	O
a	O
lot	O
of	O
amalgam	O
with	O
the	O
publish	B-Operating_System
–	I-Operating_System
subscribe	I-Operating_System
pattern	I-Operating_System
because	O
it	O
shares	O
a	O
certain	O
amount	O
of	O
similarities	O
(	O
e.g.	O
</s>
<s>
MQTT-Client-Broker-Explained	O
by	O
HiveMQ	O
)	O
.	O
</s>
<s>
The	O
Publish-subscribe	B-Operating_System
architectural	O
pattern	O
is	O
represented	O
by	O
Many	O
to	O
Many	O
diagram	O
.	O
</s>
<s>
Here	O
,	O
the	O
messaging	O
functionalities	O
are	O
hidden	O
as	O
a	O
Cross-cutting	B-Application
concern	I-Application
.	O
</s>
