EXTENDED Deadline October 18th - Semantic Web Applications and Tools for the Life Sciences (SWAT4LS 2011)
by Adrian Paschke
++++ Extended Submission Deadline is - October 18th, 2011 ++++
Call for Papers
4th International Workshop on
Semantic Web Applications and Tools for the Life Sciences
SWAT4LS 2011
<http://www.swat4ls.org/2011/> http://www.swat4ls.org/2011/
Dec 7th-9th, 2011, London, UK
In cooperation with ACM SIG Bioinformatics, W3C
News:
*********************************************************************
* Extended Full Paper Submission Deadline is October 18th *
* Proceedings will be published and listed in the ACM ICP Series *
* SWAT4LS in cooperation with the ACM SIG Bioinformatics *
* SWAT4LS supported by W3C *
* Journal Special Issue for extended and revised accepted papers *
* Program includes Hackathon, Tutorials, Keynotes, Demos, Panel *
* http://www.swat4ls.org/workshops/london2011/scientific-programme/ *
* Sponsored by BBSRC, NCBO, BioMed Central *
*********************************************************************
Deadlines
======================================================
- EXTENDED Abstract submission deadline: 14th October
- EXTENDED Papers submission deadline: 18th October 2011
- Posters and demo submission deadline: 31 October 2011
- Communication of acceptance: 7 November 2011
- Camera ready: 21 November 2011
Instructions
======================================================
All papers and posters must be in English, formatted according to ACM IPCS
guidelines (http://www.acm.org/sigs/publications/proceedings-templates) and
submitted in pdf format.
- Submissions for papers should report original research, and should be
between 4 and 8 pages.
- Submissions for position papers should report qualified opinions,
recommendations or conclusions, and should be between 1 and 3 pages.
- Submissions for posters should be between 1 and 2 pages.
- Submissions for software demo proposals should also be between 1 and 2
pages.
Submission
======================================================
All submissions are handled via the EasyChair submission system (
https://www.easychair.org/conferences/?conf=swat4ls2011).
To ensure high quality, submitted papers will be carefully peer-reviewed by
at least three members of the Scientific Committee.
14 years, 5 months
NPE on fact insertion if rule has sliding window
by John
Hello,
I've been messing with this for days now and can't get to the bottom of
this. I'm using drools 5.2.0 Final and setting up my KnowledgeBase with a
KnowledgeAgent which is pulling a package from guvnor (also 5.2.0 Final). I
do NOT get this error if I use a KnowledgeBuilder and add the exact same drl
file as a resource.
If the DRL in guvnor has a rule that uses a sliding window, i get an NPE
when trying to insert an object and the following stack trace:
java.lang.NullPointerException
at
org.drools.reteoo.ReteooFactHandleFactory.newFactHandle(ReteooFactHandleFactory.java:56)
at
org.drools.common.AbstractFactHandleFactory.newFactHandle(AbstractFactHandleFactory.java:80)
at
org.drools.common.AbstractFactHandleFactory.newFactHandle(AbstractFactHandleFactory.java:65)
at org.drools.common.NamedEntryPoint.createHandle(NamedEntryPoint.java:705)
at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:282)
at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:905)
at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:864)
at
org.drools.impl.StatefulKnowledgeSessionImpl.insert(StatefulKnowledgeSessionImpl.java:255)
at john.DroolsError.runRules(DroolsError.java:48)
at john.DroolsError.main(DroolsError.java:40)
Here is the DRL:
1. | package drools
2. | import simple.SimpleType
3. |
4. |
5. |
6. |
7. |
8. |
9. | import simple.SimpleType;
10. |
11. | declare SimpleType
12. | @role(event)
13. | end
14. |
15. | rule "timer"
16. | timer (cron:5/5 * * * * ?)
17. | when
18. | $newest : Number()
19. | from accumulate( SimpleType ($num : number) over
window:time(5s),
20. | max($num) )
21. | $st : SimpleType( number == $newest.intValue )
22. | then
23. | System.out.println("SimpleType: " + $st.number);
24. | end
(note: the first import of simple.SimpleType comes from the package
configuration in guvnor, the second is in the drl file itself. the file will
not validate without the import explicitly listed there, saying the type is
not declared as an event...)
Here is the Java code:
ResourceChangeScannerConfiguration sconf = ResourceFactory
.getResourceChangeScannerService()
.newResourceChangeScannerConfiguration();
sconf.setProperty("drools.resource.scanner.interval", "20");
ResourceFactory.getResourceChangeScannerService().configure(sconf);
KnowledgeBaseConfiguration config = KnowledgeBaseFactory
.newKnowledgeBaseConfiguration();
config.setOption(EventProcessingOption.STREAM);
KnowledgeAgentConfiguration aconf = KnowledgeAgentFactory
.newKnowledgeAgentConfiguration();
aconf.setProperty("drools.agent.scanDirectories", "true");
aconf.setProperty("drools.agent.scanResources", "true");
aconf.setProperty("drools.agent.newInstance", "false");
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase(config);
KnowledgeAgent kagent = KnowledgeAgentFactory.newKnowledgeAgent(
"drools agent", kbase, aconf);
String urlString =
"http://localhost:8080/drools-guvnor/org.drools.guvnor.Guvnor/package/droo...";
try {
URL url = new URL(urlString);
UrlResource urlResource = (UrlResource) ResourceFactory
.newUrlResource(url);
urlResource.setBasicAuthentication("enabled");
urlResource.setUsername("John");
urlResource.setPassword("");
kagent.applyChangeSet(urlResource);
} catch (Exception e) {
System.out.println("Caught exception: " + e.getMessage());
e.printStackTrace();
}
ResourceFactory.getResourceChangeNotifierService().start();
ResourceFactory.getResourceChangeScannerService().start();
StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();
System.out.println("Initialize drools complete");
SimpleType simp = new SimpleType();
simp.setNumber(5);
ksession.insert(simp);
Thanks,
John
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14 years, 5 months
best design pattern for fusion stream
by slyfox
I have a trading application that currently handles a fair amount of messages
per second, generally in the thousands. Soon it will handle 10s and perhaps
hundreds of thousands of messages.
I have not done any load testing yet but while I am here I figured I should
ask if there are any known limitations that I may run in to?
Presently my trading app handles price quotes by consuming an amqp queue
bound to a topic:
try {
q = quotes.poll(100, TimeUnit.MILLISECONDS);
if (q != null)
handleIncomingQuote(q);
} catch ...
I would like to use fusion so that I can get the code infrastructure done
and then hopefully never have to deal with code again for writing my
strategies, ideally all of that will be in the form of rules.
So I am at a point where I need to learn the camel integration piece so that
fusion will consume the amqp feed.
However, and this is my question, general practice is not to immediately do
any work on incoming message, currently I add to a LinkedBlockingQueue and
then pick up from another thread (shown above). So should I even worry
about the AMQP/Camel integration? It would seem to me that if fusion is
acting on each event this could become an eventual bottleneck. I wonder if
I would be better off manually inserting my incoming quotes into the entry
point in the manner that I have above, essentially by replacing
handleIncomingQuote(q) with EntryPoint.insert(q)?
Or does the working memory handle the buffering for me? Looking at the
Stream and Entry point doc I would say there is a chance but I am not
certain.
Thanks
Bobby
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14 years, 5 months
rule limit
by Bobby Richards
Is it possible to limit the number of rules in a drl file?
Thanks,
Bobby
14 years, 5 months
The database returned no natively generated identity value
by vanrobstone
Hi,
I am trying to get a webapp ported from oracle to db2. I managed to get all
the sql loaded in but it is now failing with the above error. After a day's
searching (I am not a web-developer by trade so please bear with me) I
managed to do a DB2 Driver trace and possibly narrow down my problem to a
table drools appears to create
SessionInfo
One of the columns is an id field that hibernate appears to be populating
with the following sql
Shortly after I am receiving the following stack trace (apppended to the
foot of this query).
I feel like there ought to be a trigger or something that would actually
populate the id field but hibernate seems to have problems. For all the
tables we have created we have created sequence numbers where appropriate
and are used by annotations in the code
I am not sure how to do the same for this generated table
Cheers for looking.
As promised the stack
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14 years, 5 months
Get previous fact from working memory.
by tungl
Hello everyone,
I think my problem is quite simple, but still, I can't come up with a
solution.
What I want to do is compare the last fact with the current one and I'm
wondering how
to do that.
That's how I check if the EventType of the current Event is EVENT1. What I
want to do now is check if the EventType of the current Event is EVENT1 and
EventType of the previous Event is EVENT2. How can I do that?
Thanks very much in advance,
Martin
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14 years, 5 months
IllegalStateException happens when ResourceChangeScanner working on Version 5.3.0.CR1
by Oliver Liu
Hi Guys,
I want to upgrade drools from 5.1.1 to 5.3.0 CR1, but i found
ResourceChangeScanner could't work.
In version 5.1.1, i wrote this code to get a KnowledgeAgent
KnowledgeAgent kagent =
KnowledgeAgentFactory.newKnowledgeAgent("ReleaseAgent");
kagent.addEventListener(new ReloadingRuleEventListener(this));
kagent.applyChangeSet(ResourceFactory.newClassPathResource("changeset-url.xml"));
changeset-url.xml content is like:
<change-set xmlns='http://drools.org/drools-5.0/change-set'
xmlns:xs='http://www.w3.org/2001/XMLSchema-instance'
xs:schemaLocation='http://drools.org/drools-5.0/change-set
http://anonsvn.jboss.org/repos/labs/labs/jbossrules/trunk/drools-api/src/...'
>
<add>
<resource
source='http://hostname:8080/drools-guvnor/org.drools.guvnor.Guvnor/package/Packa...'
type='PKG' basicAuthentication="enabled" username="user1"
password="123456" />
<resource
source='http://hostname:8080/drools-guvnor/org.drools.guvnor.Guvnor/package/Packa...'
type='PKG' basicAuthentication="enabled" username="user1"
password="123456" />
<resource
source='http://hostname:8080/drools-guvnor/org.drools.guvnor.Guvnor/package/Packa...'
type='PKG' basicAuthentication="enabled" username="user1"
password="123456" />
</add>
</change-set>
then wrote this code to scan if there is a new version snapshot on guvnor
ResourceChangeScannerConfiguration sconf = ResourceFactory
.getResourceChangeScannerService()
.newResourceChangeScannerConfiguration();
sconf.setProperty("drools.resource.scanner.interval","60");
ResourceFactory.getResourceChangeScannerService().configure(sconf);
ResourceFactory.getResourceChangeScannerService().start();
ResourceFactory.getResourceChangeNotifierService().start();
It works very well, each time when ResourceChangeScanner finding there is
new snapshot, it can reload the rules from guvnor properly.
But when i updated to 5.3.0 CR1, ran this code, error happens:
Exception in thread "Thread-2" java.lang.IllegalStateException: reader does
have
a modified date
at
org.drools.io.impl.ReaderResource.getLastModified(ReaderResource.java
:64)
at
org.drools.io.impl.ResourceChangeScannerImpl.scan(ResourceChangeScann
erImpl.java:169)
at
org.drools.io.impl.ResourceChangeScannerImpl$ProcessChangeSet.run(Res
ourceChangeScannerImpl.java:326)
at java.lang.Thread.run(Thread.java:619)
It seems in new version, UrlResource was parsed to ReaderResource(i rememer
in 5.1.1, each resource in changeset-url.xml was parsed to UrlResource).
Can you give a help?
Thanks a lot
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14 years, 5 months
