Re: [rules-users] help! rule"rule_key" failed to predicate
Hi,
I thnik you might need to reposition dialect = "mvel". The compiling error
will go away if you put it inside each of your rules. See example:
rule "system will execute 'tc' command"
when
dialect "mvel"
eval(Server.Message>8388608)
then
System.out.println("The network is so crowd that it needs repairing.");
Runtime.getRuntime().exec("tc");#give the authority and execute the
"tc"
command
end
rule "caution"
dialect "mvel"
when
eval(Server.Message==8388608)
then
System.out.println("caution!The network maybe will get blocked very
soon.");
end
rule "fluent network"
dialect "mvel"
when
eval(Server.Message<8388608)#conditions
then
System.out.println("the current network is very good");#actions
end
Also, mvel is needed to make the "eval" statement work. In your case, it
might not be needed to work with eval at all.
WHEN Server.message < .... should work as well. Providing you have an
attribute message in Server with a getter defined.
Regards,
Frank
赵慧 wrote:
hello,everyone! I wrote a rule with Drools, I compile the program and get
the errors as follows:
[3,0]: [ERR 103] Line 3:0 rule 'rule_key' failed predicate:
{(validateIdentifierKey(DroolsSoftKeywords.RULE))}? in rule
[3,9]: [ERR 101] Line 3:9 no viable alternative at input 'com' in rule
package
[7,0]: [ERR 101] Line 7:0 no viable alternative at input 'import' in rule
package in rule sample
I don't know how it happened, looking forward to your reply! thank you !!!
PS: My rules are here:
dialect "mvel"
package com.sample
import com.sample.Server;
rule "system will execute 'tc' command"
when
eval(Server.Message>8388608)
then
System.out.println("The network is so crowd that it needs
repairing.");
Runtime.getRuntime().exec("tc");#give the authority and execute the
"tc" command
end
rule "caution"
when
eval(Server.Message==8388608)
then
System.out.println("caution!The network maybe will get blocked
very soon.");
end
rule "fluent network"
when
eval(Server.Message<8388608)#conditions
then
System.out.println("the current network is very good");#actions
end
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