The rule you have shown is not capable of producing that error message. Which version of Drools are you using?
(1) You cannot use "=" (in: MyEvent(prop1="XYZ") to compare two values.
(2) You cannot use "matches" in eval, where Java expressions are expected (in: eval((prop3 matches ...).
(3) You must use one argument for a call to count (in: accumulate(..., count())), even though this argument does not matter.
(4) You should not use eval where it is not necessary.
(5) Your must use correct regular expressions, there is an error in: matches ("MatchOne|MatchTwo){1}::"+... and also in: matches "(second|Third{1}_CONNECT".
(6) It is highly unusual to use a repeat count of 1 for a subpattern in a regular expression.
Anyway, below is a correct version of the LHS except for the patterns, where I don't know what you really need to match.
Moreover, I urgently suggest that you
- DO NOT post the same question twice within 24 hours. Cleaning up the mess takes time.
- Read the Drools Expert documentation before you write rules.
- Start with simple conditions and test that they work.
- Read the Drools Expert documentation.
- Build and test more complex patterns once simple patterns work as expected.
- Read the Java documentation on regular expressions.
The following code has been compiled successfully using Drools 5.1.1, but some regular expressions contain errors, which will throw an exception at runtime.
declare MyEvent
@role( event )
prop1 : String
prop2 : int
prop3 : String
end
function String getFirstNameRegex(){ return "blah"; }
function String getMMSCNameRegex(){ return "gaga"; }
function String getServerID(){ return "R2D2"; }
function int getNodeCount(){ return 20; }
function int getConnectionCount(){ return 20; }
function int getThirdNodeCount(){ return 20; }
rule "or-or-or"
when
MyEvent(prop1 == "XYZ") over window:time(1m) from entry-point MyStream
or
( MyEvent() over window:time(1m) from entry-point MyStream
and
Number($i1 : doubleValue > (getNodeCount()*0.35) ) from accumulate(
MyEvent(
prop1 == "CONNECT",
prop2 == 3,
prop3 matches ("match " + getFirstNameRegex() + " Connect")
) over window:time(1m) from entry-point MyStream,
count(1) )
)
or
( MyEvent() over window:time(1m) from entry-point MyStream
and
Number($i2 : doubleValue > (getConnectionCount()*0.4) ) from accumulate(
MyEvent(
prop1 matches "(second|Third{1}_CONNECT",
prop2 == 1,
prop3 matches ("MatchOne|MatchTwo){1}::" + getMMSCNameRegex()+", failure")
) over window:time(1m) from entry-point MyStream,
count(1) )
)
or
( MyEvent() over window:time(1m) from entry-point MyStream
and
Number($i3 : doubleValue > (getThirdNodeCount()*0.5) ) from accumulate(
MyEvent(
prop1 matches "(E1|E2){1}_CONNECT",
prop2 == 3,
prop3 matches ("REPT (one|five|seven){1}::" + getServerID()+" is down")
) over window:time(1m) from entry-point MyStream,
count(1) )
)
then
System.out.println( "match" );
end
-WOn 28 January 2011 07:08, Ayush
<ayush.vatsyayan@alcatel-lucent.com> wrote:
When I'm trying to execute multiple evals I'm getting errors. Below is what
I'm trying to do
MyEvent(prop1="XYZ") over window:time(1m) from entry-point
MyStream
or
(MyEvent() over window:time(1m) from entry-point MyStream
and
Number($i1 : doubleValue)
from accumulate(
MyEvent(
prop1 == "CONNECT",
prop2 == 3,
eval((prop3 matches ("match "+getFirstNameRegex()+"
Connect")) == true)
) over window:time(1m) from entry-point MyStream,
count()
)
and
eval($i1 > getNodeCount()*0.35))
or
(MyEvent() over window:time(1m) from entry-point MyStream
and
Number($i2 : doubleValue)
from accumulate(
MyEvent(
prop1 matches "(second|Third{1}_CONNECT",
prop2 == 1,
eval((prop3 matches
("MatchOne|MatchTwo){1}::"+getMMSCNameRegex()+", failure")) == true)
) over window:time(1m) from entry-point MyStream,
count()
)
and
eval($i2 > getConnectionCount()*0.4))
or
(MyEvent() over window:time(1m) from entry-point MyStream
and
Number($i3 : doubleValue)
from accumulate(
MyEvent(
prop1 matches "(E1|E2){1}_CONNECT",
prop2 == 3,
eval((prop3 matches ("REPT (one|five|seven){1}::
"+getServerID()+" is down")) == true)
) over window:time(1m) from entry-point MyStream,
count()
)
and
eval($i3 > getThirdNodeCount()*0.5))
When I'm trying to execute the above LHS I get
org.drools.rule.InvalidPatternException: Required Declarations not bound:
'$i1'.
I even tried using below approach
AlertReceivedEvent() over window:time(1m) from entry-point
NotificationStream
$I1 : Double() from getIsgNodeCount()
Number(doubleValue > $I1) from accumulate(
AlertReceivedEvent(
entity == "NPMMS_NE_CONNECT",
probableCause == 3,
eval((specificProblems matches ("REPT ISG
NPMMS::Unable to connect to "+getPxmmsNameRegex()+" node: PXMMS")) == true)
) over window:time(1m) from entry-point
NotificationStream, count()
)
But when I'm placing parentheses () around it, it throws exception stating
mismatched input '$I1' expecting ')' in rule. For now I'd placed these 3
statements in separate rules. Can anyone please help me solving it? Thanks
in advance.
--
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