java - can we access working memory fact of drools rule engine in jbpm6 script task? -


is there way access working memory fact of drools rule engine in jbpm6 script task?

i have model class : application.java rule : check if salary > 10000 (part of rule group : salarycheck )

jbpm flow : start -> salarycheck(rule task, associated rule group : salarycheck) -> updatescore(script task) -> end

updatescore - script rask code:

system.out.println(system.out.println((application)(kcontext.getkieruntime().getfacthandles().toarray()[0]));

error:

java.lang.classcastexception: org.drools.core.common.defaultfacthandle cannot cast org.model.application

updated script task:

import org.model.application import org.drools.runtime.rule.queryresults import org.drools.runtime.rule.queryresultsrow  queryresults results = kcontext.getkieruntime().getqueryresults( "getobjectsofapplication" );  ( queryresultsrow row : results ) {     application applicantion = ( application ) row.get( "$result" );      application.setscore(700);     system.out.println("application object :: "+ application); }

added query rule drl file

query "getobjectsofapplication"     $result: application() end

getfacthandles() not method looking for. method think looking getobjects(). either way, getting first element of returned collection without validation seems dangerous me. can't guarantee order of elements in returned collection remain same between different invocations.

a better approach use version of getobjects() accepts objectfilter parameter. better , more 'declarative' approach define query in returns exact object looking for. can execute query using kcontext.getkieruntime().getqueryresults().

you can better understanding on of these 2 approaches (using objectfilter or query) in thread: retrieving facts of specific type working memory

edit:

the post suggested using query or objectfilter drools 5 code. in drools 6, api classes moved different package. these imports should use if want invoke query in code:

  • org.kie.api.runtime.rule.queryresults
  • org.kie.api.runtime.rule.queryresultsrow

these classes both part of kie-api project.


Comments

Post a Comment

Popular posts from this blog

html - Outlook 2010 Anchor (url/address/link) -

i'm trying link specific pdf page msoutlook'10 or msword'10, #page=... anchor particularly useful , works fine elsewhere. unfortunately when click [ctr-k] in outlook or winword, links re-formatted assuming unc path. pdf file located on shared drive. using "file:" prefix links open pdf in adobe reader (outside of browser), , "http:" open inside browser. issue seem need open in browser "file:" prefix in order anchor work. know anchors work inside browser. outlook uses windows/explorer default program (based on file extension) seems open in adobe reader neglecting anchor. is aware of solution, link specific page or bookmark of shared-pdf ms outlook and/or winword link? common references: mailermailer.com/...anchor-tags-html-emails campaignmonitor.com/...anchor-links-in-email-newsletters/ stackoverflow.com/...anchor-in-pdf-document
Read more

javascript - Why does running this loop 9 times take 100x longer than running it 8 times? -

consider code: test = function() { } t = new test(); (var = 0; < 8; i++) { result = t instanceof test; } if change number of iterations 8 9 , loop take 100 times longer complete in latest version of firefox (41.0.1). tested on 2 different pcs , magic limit 8. here jsperf test used: http://jsperf.com/instanceof-8-times-vs-9-times does have idea why might happen? seems specific instanceof . not happen if else object, example check property. note: filed bugzilla bug this. jan de mooij mozilla team has posted details in bugzilla thread . here's simplistic interpretation of highly technical answers: in i < 8 case, firefox smart enough hoist result = t instanceof test; statement out of loop (according tests, doesn't seem omit altogether). in i < 9 case, apparently doesn't optimization . why? reason not clear, related fact 9 iterations threshold above function considered "hot" enough run through jit compiler. i < 8 cas...
Read more

Getting gateway time-out Rails app with Nginx + Puma running on Digital Ocean -

following this guide setup app on digital ocean droplet, not working. site not loading , it's throwing: "gateway time-out". the puma server works, since ps aux | grep puma prints: root 15878 0.0 0.4 376832 2168 ? sl 12:50 0:00 puma 2.13.4 (unix:///var/www/myapp/shared/tmp/sockets/myapp-puma.sock) [20150930164940] root 15881 0.0 0.7 903676 3692 ? sl 12:50 0:06 puma: cluster worker 0: 15878 [20150930164940] root 24654 0.0 0.1 11748 916 pts/2 s+ 18:00 0:00 grep --color=auto puma my nginx config: user root; worker_processes 1; events { worker_connections 1024; } http { upstream puma { server unix:///var/www/myapp/shared/tmp/sockets/myapp-puma.sock; } server { listen 80; server_name myapp.com; root /var/www/myapp/current/public; access_log /var/www/myapp/current/log/access.log; error_log /...
Read more