7:45 a.m.
Hi,
I'm using eclipse drools builder to develop my rules, and when I define one
drools declared type in one resource and use it in a different drools
resource, the declared type is not resolved. Even if the resources are in
the same package.
Also, when I include the files in the correct order in the knowledgeBase,
everything starts working in my application.
1)Is there a way to make my eclipse drools builder find the declared type in
the other resources? It shows the following error: Unable to resolve
ObjectType
2)Is there a way to make the files work in any order? Now, my application
works only if the declared types are with resource name alphabetically
preceeding the name of the resource where the types are used.
Please tell me if you need additional information.
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4:31 p.m.
I think you should put them in a drools.package file in the same directory
as the rule files - I think that is how it was designed to work.
On Tue, Dec 14, 2010 at 12:45 AM, stanka <stanska(a)gmail.com> wrote:
Hi,
I'm using eclipse drools builder to develop my rules, and when I define one
drools declared type in one resource and use it in a different drools
resource, the declared type is not resolved. Even if the resources are in
the same package.
Also, when I include the files in the correct order in the knowledgeBase,
everything starts working in my application.
1)Is there a way to make my eclipse drools builder find the declared type
in
the other resources? It shows the following error: Unable to resolve
ObjectType
2)Is there a way to make the files work in any order? Now, my application
works only if the declared types are with resource name alphabetically
preceeding the name of the resource where the types are used.
Please tell me if you need additional information.
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6:23 a.m.
Here are more details:
I have one drools resource Person.drl with the following content:
package testpkg
declare Person
name : String
end
And another file PersonRules.drl in the same dir with the following content:
package testpkg
rule "Your First Rule"
when
Person(name == "Bobi")
then
System.out.println("hi bobi");
end
1)Drools builder shows an error(Unable to resolve ObjectType person) on line
Person(name == "Bobi")
Is there a way to workarround the problem?
2)I construct the knowledgebase using
http://grepcode.com/file/repository.jboss.com/maven2/org.drools/drools-an...
and bintype=PACKAGEBINTYPE= "knowledge" and binformat:PACKAGEBINFORMAT !=
package.
When I use PeronRules for name of the drools rules resource, the
knowledgebase is built, but if I rename the file from PeronRules to
1PeronRules I get the following error:
Unable to resolve ObjectType 'Person' : [Rule name='Your First Rule']
The problem with the order is, sometimes the rules filename may be loaded
after the type declaration which seems to be a problem, how can I deal with
this?
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10:13 a.m.
Yep, I can reproduce what you are seeing. The order of files being read
in (alphabetical/lexical order..) matters in that the
DroolsCompilerAntTask will compile them one at a time:
public class DroolsCompilerAntTask extends MatchingTask {
....
private void createWithKnowledgeBuilder(AntClassLoader loader) throws
FileNotFoundException,
DroolsParserException,
IOException {
...
for ( int i = 0; i < fileNames.length; i++ ) {
// compile rule file and add to the builder
compileAndAddFile( builder,
fileNames[i] );
}
...
}
}
I'll take a look at the code and fix it up in the near future, but for
now what you can do is just as Mic said to put your declared types in
let's say drools.package file and make sure in your ant tasks that they
get read first. In my simple test this worked fine:
<target name="declaredtypes">
<compiler srcdir="ant" tofile="antout/person.rules">
<!-- classpathref="cheese.classpath" -->
<include name="*.package" />
</compiler>
</target>
<target name="rules" depends="declaredtypes">
<compiler srcdir="ant" tofile="antout/person.rules">
<!-- classpathref="cheese.classpath" -->
<include name="*.drl" />
<include name="*.brl" />
<include name="*.xml" />
<include name="*.dslr" />
</compiler>
</target>
since all declarations are in drools.package (or person.package or
whatever you want to call it), and making sure that "rules" target
depends on the "declaredtypes" target you can assure your declared types
get read first. Let me know if this helps.
Thanks.
On 12/14/10 7:23 AM, stanka wrote:
Here are more details:
I have one drools resource Person.drl with the following content:
package testpkg
declare Person
name : String
end
And another file PersonRules.drl in the same dir with the following content:
package testpkg
rule "Your First Rule"
when
Person(name == "Bobi")
then
System.out.println("hi bobi");
end
1)Drools builder shows an error(Unable to resolve ObjectType person) on line
Person(name == "Bobi")
Is there a way to workarround the problem?
2)I construct the knowledgebase using
http://grepcode.com/file/repository.jboss.com/maven2/org.drools/drools-an...
and bintype=PACKAGEBINTYPE= "knowledge" and binformat:PACKAGEBINFORMAT !=
package.
When I use PeronRules for name of the drools rules resource, the
knowledgebase is built, but if I rename the file from PeronRules to
1PeronRules I get the following error:
Unable to resolve ObjectType 'Person' : [Rule name='Your First Rule']
The problem with the order is, sometimes the rules filename may be loaded
after the type declaration which seems to be a problem, how can I deal with
this?
4:20 p.m.
Any package scoped things really should go in the .package file IIRC.
There is no clever resolving across multiple files (not sure if that is a
valid feature request or not).
On Wed, Dec 15, 2010 at 3:13 AM, Tihomir Surdilovic <tsurdilo(a)redhat.com>wrote:
Yep, I can reproduce what you are seeing. The order of files being
read
in (alphabetical/lexical order..) matters in that the
DroolsCompilerAntTask will compile them one at a time:
public class DroolsCompilerAntTask extends MatchingTask {
....
private void createWithKnowledgeBuilder(AntClassLoader loader) throws
FileNotFoundException,
DroolsParserException,
IOException {
...
for ( int i = 0; i < fileNames.length; i++ ) {
// compile rule file and add to the builder
compileAndAddFile( builder,
fileNames[i] );
}
...
}
}
I'll take a look at the code and fix it up in the near future, but for
now what you can do is just as Mic said to put your declared types in
let's say drools.package file and make sure in your ant tasks that they
get read first. In my simple test this worked fine:
<target name="declaredtypes">
<compiler srcdir="ant" tofile="antout/person.rules">
<!-- classpathref="cheese.classpath" -->
<include name="*.package" />
</compiler>
</target>
<target name="rules" depends="declaredtypes">
<compiler srcdir="ant" tofile="antout/person.rules">
<!-- classpathref="cheese.classpath" -->
<include name="*.drl" />
<include name="*.brl" />
<include name="*.xml" />
<include name="*.dslr" />
</compiler>
</target>
since all declarations are in drools.package (or person.package or
whatever you want to call it), and making sure that "rules" target
depends on the "declaredtypes" target you can assure your declared types
get read first. Let me know if this helps.
Thanks.
On 12/14/10 7:23 AM, stanka wrote:
> Here are more details:
>
> I have one drools resource Person.drl with the following content:
>
> package testpkg
>
> declare Person
> name : String
> end
>
> And another file PersonRules.drl in the same dir with the following
content:
> package testpkg
>
>
> rule "Your First Rule"
>
> when
> Person(name == "Bobi")
> then
> System.out.println("hi bobi");
>
> end
>
> 1)Drools builder shows an error(Unable to resolve ObjectType person) on
line
> Person(name == "Bobi")
> Is there a way to workarround the problem?
> 2)I construct the knowledgebase using
>
http://grepcode.com/file/repository.jboss.com/maven2/org.drools/drools-an...
> and bintype=PACKAGEBINTYPE= "knowledge" and binformat:PACKAGEBINFORMAT
!=
> package.
> When I use PeronRules for name of the drools rules resource, the
> knowledgebase is built, but if I rename the file from PeronRules to
> 1PeronRules I get the following error:
> Unable to resolve ObjectType 'Person' : [Rule name='Your First
Rule']
>
> The problem with the order is, sometimes the rules filename may be loaded
> after the type declaration which seems to be a problem, how can I deal
with
> this?
>
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rules-dev mailing list
rules-dev(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-dev
--
Michael D Neale
home: www.michaelneale.net
blog: michaelneale.blogspot.com
5:41 p.m.
On 12/14/10 5:20 PM, Michael Neale wrote:
Any package scoped things really should go in the .package file
IIRC.
There is no clever resolving across multiple files (not sure if that
is a valid feature request or not).
For now I'll just make sure .package files get read in first (if exist).
On Wed, Dec 15, 2010 at 3:13 AM, Tihomir Surdilovic
<tsurdilo(a)redhat.com <mailto:tsurdilo@redhat.com>> wrote:
Yep, I can reproduce what you are seeing. The order of files being
read
in (alphabetical/lexical order..) matters in that the
DroolsCompilerAntTask will compile them one at a time:
public class DroolsCompilerAntTask extends MatchingTask {
....
private void createWithKnowledgeBuilder(AntClassLoader loader) throws
FileNotFoundException,
DroolsParserException,
IOException {
...
for ( int i = 0; i < fileNames.length; i++ ) {
// compile rule file and add to the builder
compileAndAddFile( builder,
fileNames[i] );
}
...
}
}
I'll take a look at the code and fix it up in the near future, but for
now what you can do is just as Mic said to put your declared types in
let's say drools.package file and make sure in your ant tasks that
they
get read first. In my simple test this worked fine:
<target name="declaredtypes">
<compiler srcdir="ant" tofile="antout/person.rules">
<!-- classpathref="cheese.classpath" -->
<include name="*.package" />
</compiler>
</target>
<target name="rules" depends="declaredtypes">
<compiler srcdir="ant" tofile="antout/person.rules">
<!-- classpathref="cheese.classpath" -->
<include name="*.drl" />
<include name="*.brl" />
<include name="*.xml" />
<include name="*.dslr" />
</compiler>
</target>
since all declarations are in drools.package (or person.package or
whatever you want to call it), and making sure that "rules" target
depends on the "declaredtypes" target you can assure your declared
types
get read first. Let me know if this helps.
Thanks.
On 12/14/10 7:23 AM, stanka wrote:
> Here are more details:
>
> I have one drools resource Person.drl with the following content:
>
> package testpkg
>
> declare Person
> name : String
> end
>
> And another file PersonRules.drl in the same dir with the
following content:
> package testpkg
>
>
> rule "Your First Rule"
>
> when
> Person(name == "Bobi")
> then
> System.out.println("hi bobi");
>
> end
>
> 1)Drools builder shows an error(Unable to resolve ObjectType
person) on line
> Person(name == "Bobi")
> Is there a way to workarround the problem?
> 2)I construct the knowledgebase using
>
http://grepcode.com/file/repository.jboss.com/maven2/org.drools/drools-an...
> and bintype=PACKAGEBINTYPE= "knowledge" and
binformat:PACKAGEBINFORMAT !=
> package.
> When I use PeronRules for name of the drools rules resource, the
> knowledgebase is built, but if I rename the file from PeronRules to
> 1PeronRules I get the following error:
> Unable to resolve ObjectType 'Person' : [Rule name='Your First
Rule']
>
> The problem with the order is, sometimes the rules filename may
be loaded
> after the type declaration which seems to be a problem, how can
I deal with
> this?
>
_______________________________________________
rules-dev mailing list
rules-dev(a)lists.jboss.org <mailto:rules-dev@lists.jboss.org>
https://lists.jboss.org/mailman/listinfo/rules-dev
--
Michael D Neale
home: www.michaelneale.net <http://www.michaelneale.net>
blog: michaelneale.blogspot.com <http://michaelneale.blogspot.com>
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rules-dev(a)lists.jboss.org
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7:14 a.m.
Thanks, this helps a lot. Do you know how to make my drools builder work
also?
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9:04 a.m.
Hi,
sorry for the late reply, let's say i have the following code:
package testpkg.rules
declare Account
balance:Double
currency:String
end
declare Customer
account:Account
end
declare CustomerLimit
account:Account
limit:Double
end
declare SpentLimit
account : Account
spentAmount : Double
end
declare RemainingLimit
account: Account
remainingAmount : Double
end
rule "Calculate customer limit"
dialect "mvel"
when
Customer ( $account : account)
then
CustomerLimit $limit = new CustomerLimit();
$limit.setAccount($account);
$limit.setLimit(50);
insert($limit);
#insert(new CustomerLimit($account, 50));
end
rule "Calculate Remaining Limit"
dialect "mvel"
when
CustomerLimit($account : account, $limit : limit)
SpentLimit(account == $account, $spentAmount : spentAmount)
then
RemainingLimit $remainingLimit = new RemainingLimit();
$remainingLimit.setAccount($account);
$remainingLimit.setRemainingLimit($limit - $spentAmount);
insert($remainingLimit);
#insert(new RemainingLimit($account, $limit - $spentAmount));
end
My facts are of types used only in the rules so only customer and account
will be defined as normal POJOs, the other fact types (
CustomerLimit, SpentLimit, RemainingLimit) will be used only in the drools
rules. So instead of flooding the code of so many POJOs, I decided to use
declared types. I have the following issues:
1) If I use the declared type in one file, everything will be okay, but if I
decide to use it in other rule in another file there happens to be a
problem. So I tried to .package files as you advised. The problem with the
package files is, that the declared type can be used only in one directory.
Does it means that if I use one declared type in more than one directory I
should make it as normal POJO?
2)I am using the drools builder in eclipse to develop my rules, it is very
useful. But it gets puzzled if I use more than one package file to store my
declared types. If I am using one drools.package file and enter all declared
types in it, everything is working. But if I decide to use different file
for every type just to find it easily, the builder cannot find the classes.
But may be I don't understand the purpose of the .package files, can you
send me a little more details about it, or where I can read about it? Also,
please advise how to fix my rules in order eclipse drools builder continue
to work.
3)There is one difference in constructing declared type and normal pojo in
the rules. The java classes can have a constructor defined, and in the
example I have written above, you can see the commented line:
#insert(new RemainingLimit($account, $limit - $spentAmount));
I can't do this with the declared types, since there is no such constructor
defined. I am not sure if this is a valid point, but the commented line
seems a little bit more readable to me than:
RemainingLimit $remainingLimit = new RemainingLimit();
$remainingLimit.setAccount($account);
$remainingLimit.setRemainingLimit($limit - $spentAmount);
insert($remainingLimit);
I just want to doublecheck if there is a more proper way to this.
Thanks and please tell me if you need some more additional information.
Stanka
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3:24 a.m.
Please ignore comment for type declaration construction, it is solved by
https://issues.jboss.org/browse/JBRULES-2652
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9 comments
3 participants
participants (3)
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Michael Neale -
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Tihomir Surdilovic