<s>
inspectIT	B-General_Concept
is	O
an	O
open-source	B-Application
application	I-Application
performance	O
management	O
(	O
APM	O
)	O
tool	O
,	O
which	O
enables	O
the	O
diagnosis	O
,	O
analysis	O
and	O
monitoring	O
of	O
Java	B-Language
applications	O
.	O
</s>
<s>
inspectIT	B-General_Concept
is	O
developed	O
by	O
NovaTec	O
Consulting	O
GmbH	O
,	O
an	O
IT	O
consulting	O
company	O
from	O
Stuttgart	O
(	O
Germany	O
)	O
,	O
but	O
it	O
has	O
been	O
made	O
open-source	B-Application
in	O
August	O
2015	O
.	O
</s>
<s>
inspectIT	B-General_Concept
follows	O
a	O
"	O
user-transaction-centered	O
”	O
approach	O
,	O
whereby	O
the	O
focus	O
is	O
on	O
the	O
analysis	O
of	O
concrete	O
user	O
requests	O
.	O
</s>
<s>
For	O
each	O
request	O
against	O
a	O
system	O
which	O
is	O
supervised	O
by	O
inspectIT	B-General_Concept
,	O
a	O
detailed	O
call	B-Application
tree	I-Application
,	O
named	O
invocation	O
sequence	O
,	O
is	O
constructed	O
.	O
</s>
<s>
Since	O
version	O
1.8.1	O
,	O
inspectIT	B-General_Concept
offers	O
functionality	O
for	O
real	O
user	O
monitoring	O
that	O
records	O
user	O
interaction	O
with	O
,	O
for	O
example	O
,	O
a	O
website	O
or	O
web-based	O
application	O
.	O
</s>
<s>
The	O
architecture	O
of	O
inspectIT	B-General_Concept
consists	O
of	O
three	O
main	O
components	O
:	O
</s>
<s>
inspectIT	B-General_Concept
Agent	O
—	O
it	O
is	O
integrated	O
into	O
the	O
system	O
which	O
should	O
be	O
supervised	O
,	O
collects	O
diagnostic	O
information	O
of	O
the	O
integrated	O
measuring	O
points	O
and	O
sends	O
the	O
gathered	O
data	O
to	O
the	O
central	O
inspectIT	B-General_Concept
Server	O
.	O
</s>
<s>
inspectIT	B-General_Concept
Server	O
(	O
also	O
called	O
centralized	O
measurement	O
repository	O
(	O
CMR	O
)	O
)	O
—	O
it	O
receives	O
,	O
processes	O
and	O
stores	O
the	O
diagnostic	O
information	O
sent	O
by	O
the	O
inspectIT	B-General_Concept
agents	O
and	O
provides	O
it	O
to	O
the	O
inspectIT	B-General_Concept
user	O
interface	O
.	O
</s>
<s>
inspectIT	B-General_Concept
User	O
Interface	O
-	O
it	O
is	O
an	O
Eclipse	O
RPC	O
based	O
application	O
and	O
enables	O
the	O
analysis	O
of	O
the	O
diagnostic	O
information	O
provided	O
by	O
the	O
inspectIT	B-General_Concept
Server	O
.	O
</s>
<s>
During	O
the	O
Java	B-Language
class	I-Language
loading	O
process	O
of	O
the	O
JVM	B-Language
,	O
a	O
Java-based	O
agent	O
is	O
integrated	O
into	O
the	O
class	O
loading	O
process	O
,	O
which	O
is	O
able	O
to	O
intercept	O
and	O
modify	O
the	O
Java	B-Language
bytecode	I-Language
of	O
loaded	O
classes	B-Language
.	O
</s>
<s>
Contrary	O
to	O
profilers	O
,	O
inspectIT	B-General_Concept
injects	O
measurement	O
points	O
only	O
at	O
specific	O
locations	O
to	O
keep	O
the	O
overhead	O
of	O
the	O
measurements	O
at	O
a	O
minimum	O
.	O
</s>
<s>
The	O
development	O
of	O
inspectIT	B-General_Concept
started	O
in	O
the	O
year	O
2005	O
under	O
the	O
name	O
NovaSpy	O
as	O
closed	B-Application
source	I-Application
software	I-Application
.	O
</s>
<s>
It	O
was	O
renamed	O
into	O
inspectIT	B-General_Concept
in	O
2008	O
and	O
the	O
first	O
major	O
release	O
(	O
version	O
1.0	O
)	O
has	O
been	O
released	O
in	O
March	O
2010	O
.	O
</s>
<s>
On	O
August	O
14	O
,	O
2015	O
,	O
inspectIT	B-General_Concept
has	O
been	O
made	O
available	O
as	O
open-source	B-Application
software	I-Application
under	O
the	O
Apache	B-Application
License	I-Application
,	I-Application
Version	I-Application
2.0	I-Application
(	O
ALv2	B-Application
)	O
.	O
</s>
