Invoke Decision service using Java instead of web service

Question

From a practical perspective, would it be possible to instantiate oracle.bpel.services.rules.impl.DecisionServiceImpl (this is the class used by the BPEL Decision service) in a normal Java program and invoke operations in it to interact with Oracle Rules.
I have tried it but keep getting this error; any clues
<OracleDataModel::getFactType> Fact type org.demo.employee.EmployeeType not found, return null.
<::> ORABPEL-36333
<::>
<::> Error while executing the rule session.
<::> The rule session employeeBonus failed to execute.
<::> Check the underlying exception and correct the error. Contact oracle support if error is not fixable.
<::>
<::> at oracle.bpel.services.rules.rpi.AbstractDefaultRuleSession.execute(AbstractDefaultRuleSession.java:214)
<::> at oracle.bpel.services.rules.impl.DecisionServiceImpl.process(DecisionServiceImpl.java:1202)
<::> at
Thanks!
The detailed logs are given below:
<RuleEngineFactory::loadConfiguration> Load configuration from DecisionServiceConfiguration.xml
<RuleEngineFactory::loadConfiguration> DecisionServiceConfiguration.xml not found, intialize with minimal configuration.
<RuleEngineFactory::loadConfiguration> Try to load rule engine provider Oracle
<RuleEngineFactory::loadConfiguration> Try to load fact context OracleJaxb
<RuleEngineFactory::loadConfiguration> Loaded 1 rule providers and 1 fact context providers.
<DefaultHierarchicalCache::><init>> Create cache for /DecisionService
<DefaultHierarchicalCache::><init>> Create Cache Event Listener for path /DecisionService
<?xml version = '1.0' encoding = 'UTF-8'?><assertExecuteWatchStateless name="DecisionService" xmlns="http://xmlns.oracle.com/bpel/rules"><assertList><Employee xmlns="http://employee.demo.org"><employeeNo>employeeNo</employeeNo><income>1200</income></Employee></assertList></assertExecuteWatchStateless><DecisionServiceImpl::assertExecuteWatchStateless> Started.
<DocumentHandler::createServiceContext> Create decision service context for
<DocumentHandler::createServiceContext> <assertExecuteWatchStateless name="DecisionService" xmlns="http://xmlns.oracle.com/bpel/rules">
<DocumentHandler::createServiceContext> <assertList>
<DocumentHandler::createServiceContext> <Employee xmlns="http://employee.demo.org">
<DocumentHandler::createServiceContext> <employeeNo>employeeNo</employeeNo>
<DocumentHandler::createServiceContext> <income>1200</income>
<DocumentHandler::createServiceContext> </Employee>
<DocumentHandler::createServiceContext> </assertList>
<DocumentHandler::createServiceContext> </assertExecuteWatchStateless>
<DocumentHandler::createServiceContext> Decision service context is
<DocumentHandler::createServiceContext> <assertExecuteWatchStateless name="DecisionService" xmlns="http://xmlns.oracle.com/bpel/rules">
<DocumentHandler::createServiceContext> <assertList>
<DocumentHandler::createServiceContext> <Employee xmlns="http://employee.demo.org">
<DocumentHandler::createServiceContext> <employeeNo>employeeNo</employeeNo>
<DocumentHandler::createServiceContext> <income>1200</income>
<DocumentHandler::createServiceContext> </Employee>
<DocumentHandler::createServiceContext> </assertList>
<DocumentHandler::createServiceContext> </assertExecuteWatchStateless>
<DecisionServiceImpl::preProcess> path: /DecisionService, context: WSIF
<DocumentHandler::readConfiguration> Read decision service config from Local J2EE WS.
<DocumentHandler::readConfiguration> Cache config URL file:/C:/learn/netbeans/OracleRulesProfile/build/classes/decisionservices.xml
<DocumentHandler::readConfiguration> Read configuration from file:/C:/learn/netbeans/OracleRulesProfile/build/classes/decisionservices.xml
<DecisionServiceCache::prepare> Cache decision services for path /DecisionService
<DefaultHierarchicalCache::create> Path /DecisionService/ruleEngine
<DefaultHierarchicalCache::><init>> Create Cache Event Listener for path /DecisionService
<DefaultHierarchicalCache::><init>> Create Cache Event Listener for path /DecisionService/ruleEngine
<DefaultHierarchicalCache::create> Path /DecisionService/decisionService
<DefaultHierarchicalCache::><init>> Create Cache Event Listener for path /DecisionService/decisionService
<DefaultHierarchicalCache::create> Path /DecisionService/datamodel
<DefaultHierarchicalCache::><init>> Create Cache Event Listener for path /DecisionService/datamodel
<DefaultHierarchicalCache::create> Path /DecisionService/ruleset
<DefaultHierarchicalCache::><init>> Create Cache Event Listener for path /DecisionService/ruleset
<DefaultHierarchicalCache::create> Path /DecisionService/rulesession
<DefaultHierarchicalCache::><init>> Create Cache Event Listener for path /DecisionService/rulesession
<DefaultHierarchicalCache::get> Path /DecisionService/ruleEngine, name: DemoRepository
<DefaultHierarchicalCache::get> Path /DecisionService/ruleEngine, name: DemoRepository not found in cache.
<DecisionServiceCache::prepare> Create rule engine for provider DemoRepository and cache at /DecisionService/ruleEngine
<RuleEngineFactory::createRuleEngine> Create rule engine for DemoRepository, provider is Oracle
<OracleRuleEngine::getLastModified> Check timestamp of repository C:\learn\jdeveloper\POC\OracleRules\demoRepository
<OracleRuleEngine::><init>> Create new rule engine for DemoRepository, repository type File
<DefaultHierarchicalCache::put> Path /DecisionService/ruleEngine, name: DemoRepository
<DefaultHierarchicalCache::get> Path /DecisionService/decisionService, name: DecisionService
<DefaultHierarchicalCache::get> Path /DecisionService/decisionService, name: DecisionService not found in cache.
<DecisionServiceCache::prepare> Cache decision service metadata for DecisionService at /DecisionService/decisionService
<DefaultHierarchicalCache::put> Path /DecisionService/decisionService, name: DecisionService
<DefaultHierarchicalCache::get> Path /DecisionService/ruleset, name: DemoRepository$demoDictionary@production$employeeBonus
<DefaultHierarchicalCache::get> Path /DecisionService/ruleset, name: DemoRepository$demoDictionary@production$employeeBonus not found in cache.
<DefaultHierarchicalCache::get> Path /DecisionService/ruleEngine, name: DemoRepository
<DecisionServiceCache::prepare> Cache rulesession metadata for DemoRepository$demoDictionary@production$employeeBonus at /DecisionService/ruleset
<OracleRuleEngine::getRuleCatalog> Lookup rule catalog demoDictionary/production
<OracleRuleEngine::getRuleCatalogs> Start loading rule catalogs.
<OracleRuleEngine::getRuleCatalogs> Initailize rule repository.
<OracleRuleEngine::initRuleRepository> Connect to File Repository at C:\learn\jdeveloper\POC\OracleRules\demoRepository
<OracleRuleEngine::getRuleCatalogs> Load catalogs.
<OracleRuleEngine::getRuleCatalog> Found rule catalog demoDictionary/production, return.
<OracleRuleCatalog::getRuleSet> Lookup ruleset employeeBonus
<OracleRuleCatalog::getRuleSets> Load rulesets.
<OracleRuleCatalog::getRuleSets> Load rulesets done.
<OracleRuleCatalog::getRuleSet> Found ruleset employeeBonus, return.
<DefaultHierarchicalCache::put> Path /DecisionService/ruleset, name: DemoRepository$demoDictionary@production$employeeBonus
<DefaultHierarchicalCache::get> Path /DecisionService/decisionService, name: DecisionService
<DecisionServiceImpl::assertExecuteWatchStateless> Process request for /DecisionService
<DecisionServiceImpl::process> DecisionService, path=/DecisionService, pattern: AssertExecuteWatchStateless
<DefaultHierarchicalCache::get> Path /DecisionService/decisionService, name: DecisionService
<DecisionServiceImpl::process> Found service DecisionService in cache.
<DefaultHierarchicalCache::get> Path /DecisionService/decisionService, name: DecisionService
<DecisionServiceCache::getRuleEngine> Get rule engine DemoRepository for service DecisionService from /DecisionService/ruleEngine
<DefaultHierarchicalCache::get> Path /DecisionService/ruleEngine, name: DemoRepository
<OracleRuleEngine::getLastModified> Check timestamp of repository C:\learn\jdeveloper\POC\OracleRules\demoRepository
<DecisionServiceImpl::process> Found rule engine DemoRepository, provider is Oracle, repository type File
<DefaultHierarchicalCache::get> Path /DecisionService/decisionService, name: DecisionService
<DefaultHierarchicalCache::get> Path /DecisionService/rulesession, name: employeeBonus
<DefaultHierarchicalCache::get> Path /DecisionService/rulesession, name: employeeBonus not found in cache.
<DecisionServiceCache::createRuleSession> Create stateless rulesession employeeBonus for service DecisionService
<DefaultHierarchicalCache::get> Path /DecisionService/ruleset, name: DemoRepository$demoDictionary@production$employeeBonus
<OracleRuleEngine::createRuleSession> Create rule session employeeBonus
<AbstractDefaultRuleSession::init> Initialize rule session employeeBonus providing rule set employeeBonus
<OracleRuleSession::init> Initialize rule session employeeBonus, ruleset employeeBonus
<OracleRuleSession::init> Initialize rule session done.
<AbstractDefaultRuleSession::execute> Exceute rule session employeeBonus, pattern: AssertExecuteWatchStateless
<AbstractDefaultRuleSession::execute> Create pattern converter for DecisionService
<AbstractDefaultRuleSession::execute> Convert decide context for DecisionService
<AbstractPatternConverter::convertList> Start converting list for Assert
<OracleDataModel::getFactType> Lookup fact type org.demo.employee.EmployeeType
<OracleDataModel::getFactTypes> Started.
<OracleDataModel::getFactTypes> Initialize data model.
<OracleDataModel::getFactTypes> Import 18 fact types into data model.
<OracleDataModel::getFactTypes> 1 XML facts imported, Done.
<OracleDataModel::getFactType> Fact type org.demo.employee.EmployeeType not found, return null.
Exception in thread "main" ORABPEL-36333
Error while executing the rule session.
The rule session employeeBonus failed to execute.
Check the underlying exception and correct the error. Contact oracle support if error is not fixable.
at oracle.bpel.services.rules.rpi.AbstractDefaultRuleSession.execute(AbstractDefaultRuleSession.java:214)
at oracle.bpel.services.rules.impl.DecisionServiceImpl.process(DecisionServiceImpl.java:1202)
at oracle.bpel.services.rules.impl.DecisionServiceImpl.assertExecuteWatchStateless(DecisionServiceImpl.java:578)
at demo.TestDecisionService.main(TestDecisionService.java:56)
...

Answer 1

If you want to use the rule engine fro Java, I guess you should use the SDK:
http://download-uk.oracle.com/docs/cd/B31017_01/web.1013/b28965/sdk.htm#sthref229