protected KnowledgeBase readKnowledgeBase() {
if (knowledgeBasesCache.containsKey(task.getId())) {
return knowledgeBasesCache.get(task.getId()).getKnowledgeBase();
}
// Creating agent with default KnowledgeAgentConfiguration for scanning files and directories
KnowledgeAgent kAgent =
KnowledgeAgentFactory.newKnowledgeAgent("Knowledge agent for task#" + task.getId());
// Adding resources for observing by KnowledgeAgent and creating KnowledgeBase.
// Current version of api (5.0.1) does not implement adding resources from KnowledgeBase,
// that was mentioned in api documentation (may be bug in source code).
// So, we use other aproach for configuring KnowledgeAgent
// Now agent interface allowes defining resources and directories for observing
// only through ChangeSet from Resource (usually xml config file)
// We create needed configuration dynamically as string
// from task parameters information
kAgent.applyChangeSet(
new ByteArrayResource(createChangeSetStringFromTaskParameters().getBytes()));
// Cache agent for further usage without recreation
knowledgeBasesCache.put(task.getId(), kAgent);
// Start scanning services for automatical updates of cached agents
startRulesScannerIfNeeded();
return kAgent.getKnowledgeBase();
}
/**
* Reading rules from Guvnor
*
* @return KnowledgeBase - the Guvnor knowledge Base
*/
private static KnowledgeBase readRemoteKnowledgeBase() {
KnowledgeAgentConfiguration kaconf = KnowledgeAgentFactory.newKnowledgeAgentConfiguration();
kaconf.setProperty("drools.agent.scanDirectories", "false");
KnowledgeAgent kagent = KnowledgeAgentFactory.newKnowledgeAgent("test agent", kaconf);
kagent.applyChangeSet(ResourceFactory.newClassPathResource("guvnor.xml"));
return kagent.getKnowledgeBase();
}
public void testDroolsGeneration(int i) throws Exception {
String filename = (i % 2 == 0) ? "/drools/stress1.drl" : "/drools/stress2.drl";
InputStreamReader reader =
new InputStreamReader(DroolsKnowledgeBaseTest.class.getResourceAsStream(filename));
KnowledgeAgentConfiguration aconf = KnowledgeAgentFactory.newKnowledgeAgentConfiguration();
aconf.setProperty("drools.agent.newInstance", "false");
aconf.setProperty("drools.agent.monitorChangeSetEvents", "false");
aconf.setProperty("drools.agent.scanResources", "false");
KnowledgeBuilder builder = compileRules(reader);
KnowledgeAgent kagent =
KnowledgeAgentFactory.newKnowledgeAgent("Success Correspondence Agent", aconf);
KnowledgeBase kbase = kagent.getKnowledgeBase();
kbase.addKnowledgePackages(builder.getKnowledgePackages());
// kagent.monitorResourceChangeEvents(false);
Rule rule1 = kbase.getRule("com.rosettastone.succor", "Equal rule 1");
Rule rule5 = kbase.getRule("com.rosettastone.succor", "Equal rule 5");
Rule rule6 = kbase.getRule("com.rosettastone.succor", "Equal rule 6");
StatelessKnowledgeSession session = kbase.newStatelessKnowledgeSession();
if (i % 2 == 0) {
Assert.assertNotNull(rule1);
Assert.assertNotNull(rule5);
Assert.assertNull(rule6);
testRulesFirst(session);
} else {
Assert.assertNull(rule1);
Assert.assertNotNull(rule5);
Assert.assertNotNull(rule6);
testRulesSecond(session);
}
}
@Override
public StatefulKnowledgeSession newStatefulKnowledgeSession(
final KnowledgeSessionConfiguration conf, final Environment env) {
StatefulKnowledgeSession returnValue = null;
if (this.cm == null) {
final KnowledgeAgent ka = this.getKnowledgeAgent();
assert ka != null;
final KnowledgeBase kb = ka.getKnowledgeBase();
if (kb != null) {
throw new IllegalStateException("KnowledgeAgent.getKnowledgeBase() == null");
}
returnValue = kb.newStatefulKnowledgeSession(conf, env);
} else {
if (this.creator == null) {
throw new IllegalStateException("this.creator == null");
}
try {
returnValue =
(StatefulKnowledgeSession)
this.cm.allocateConnection(
this.creator, new StatefulKnowledgeSessionConfiguration(conf, env));
} catch (final ResourceException kaboom) {
throw new RuntimeDroolsException(kaboom);
}
if (returnValue instanceof AbstractKnowledgeSessionUserConnection
&& cm instanceof LazyAssociatableConnectionManager) {
((AbstractKnowledgeSessionUserConnection) returnValue)
.setLazyAssociatableConnectionManager((LazyAssociatableConnectionManager) cm);
}
}
return returnValue;
}
protected void addResource(StatefulKnowledgeSession kSession, Resource res) {
KnowledgeBase kbase = kSession.getKnowledgeBase();
ChangeSetImpl cs = new ChangeSetImpl();
cs.setResourcesAdded(Arrays.asList(res));
KnowledgeAgentConfiguration kaConfig = KnowledgeAgentFactory.newKnowledgeAgentConfiguration();
kaConfig.setProperty("drools.agent.newInstance", "false");
KnowledgeAgent kAgent = KnowledgeAgentFactory.newKnowledgeAgent(" adder ", kbase, kaConfig);
kAgent.applyChangeSet(cs);
}
/**
* Check if all fields are initialized properly.
*
* <p>In this class, this method will check if the servicePeriodSplitDates contains null.
*
* @throws OPMConfigurationException if any needed field is not initialized properly.
* @since 1.1 OPM - Rules Engine - Scenarios Conversion 2 - Deduction Update Assembly
*/
@Override
@PostConstruct
public void checkConfiguration() {
super.checkConfiguration();
if (this.entityManager == null) {
throw new OPMConfigurationException("entityManager cannot be null.");
}
if (servicePeriodSplitDates != null) {
for (Date date : servicePeriodSplitDates) {
if (date == null) {
throw new OPMConfigurationException(
"Items in servicePeriodSplitDates list cannot be null.");
}
}
}
if (this.deductionTableTemplate == null) {
throw new OPMConfigurationException("deductionTableTemplate cannot be null.");
}
try {
// Generate deduction table
this.generateDeductionTable();
// Initialize knowledge agent
KnowledgeAgentConfiguration config = KnowledgeAgentFactory.newKnowledgeAgentConfiguration();
// We have to set the newInstance property to false so that the knowledge base changes can be
// reflected
config.setProperty("drools.agent.newInstance", "false");
KnowledgeAgent knowledgeAgent =
KnowledgeAgentFactory.newKnowledgeAgent("deductionKnowledgeAgent", config);
// Substitute the classpath resource location with the file system resource location
String changeSet =
ServiceHelper.inputStreamToString(
ResourceFactory.newClassPathResource("deduction-change-set.xml").getInputStream());
changeSet =
changeSet.replace(
"classpath:rules/deduction_table.xls",
"file:" + this.deductionTableTemplate.getDecisionTableFile());
knowledgeAgent.applyChangeSet(
ResourceFactory.newByteArrayResource(changeSet.getBytes("utf-8")));
this.setKnowledgeAgent(knowledgeAgent);
} catch (IOException e) {
throw new OPMConfigurationException("Failed to initialize KnowledgeAgent.");
}
}
private KnowledgeBase getKnowledgeBase() {
if (kagent == null) {
kagent = KnowledgeAgentSingleton.getInstance().getKagent();
}
// KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
// kbuilder.add( ResourceFactory.newClassPathResource("xpath-rules.drl"), ResourceType.DRL);
// if ( kbuilder.hasErrors() ) {
// throw new ActionLifecycleException("Error building rules:
// "+kbuilder.getErrors().toString());
// }
//
return kagent.getKnowledgeBase();
}
/** {@inheritDoc} */
@Override
public void destroy() {
_kbase = null;
_taskHandlers.clear();
_taskHandlerModels.clear();
_actionModels.clear();
_messageContentInName = null;
_messageContentOutName = null;
_processId = null;
if (_kagent != null) {
try {
_kagent.dispose();
} finally {
_kagent = null;
}
}
}
/** {@inheritDoc} */
@Override
public void init(QName qname, BPMComponentImplementationModel model) {
_processId = model.getProcessId();
_messageContentInName = model.getMessageContentInName();
if (_messageContentInName == null) {
_messageContentInName = MESSAGE_CONTENT_IN;
}
_messageContentOutName = model.getMessageContentOutName();
if (_messageContentOutName == null) {
_messageContentOutName = MESSAGE_CONTENT_OUT;
}
ComponentModel cm = model.getComponent();
_targetNamespace = cm != null ? cm.getTargetNamespace() : null;
_taskHandlerModels.addAll(model.getTaskHandlers());
ClassLoader loader = Classes.getClassLoader(getClass());
ResourceType.install(loader);
ComponentImplementationConfig cic = new ComponentImplementationConfig(model, loader);
Map<String, Object> env = new HashMap<String, Object>();
// env.put(EnvironmentName.ENTITY_MANAGER_FACTORY,
// Persistence.createEntityManagerFactory("org.jbpm.persistence.jpa"));
// env.put(EnvironmentName.TRANSACTION_MANAGER,
// AS7TransactionManagerLookup.getTransactionManager());
cic.setEnvironmentOverrides(env);
Properties props = new Properties();
// props.setProperty("drools.processInstanceManagerFactory",
// JPAProcessInstanceManagerFactory.class.getName());
// props.setProperty("drools.processSignalManagerFactory",
// JPASignalManagerFactory.class.getName());
cic.setPropertiesOverrides(props);
Resource procDef = model.getProcessDefinition();
if (procDef.getType() == null) {
procDef = new SimpleResource(procDef.getLocation(), "BPMN2");
}
if (model.isAgent()) {
_kagent = Agents.newAgent(cic, procDef);
_kbase = _kagent.getKnowledgeBase();
} else {
_kbase = Bases.newBase(cic, procDef);
}
_ksessionConfig = Configs.getSessionConfiguration(cic);
_environment = Environments.getEnvironment(cic);
_audit = model.getAudit();
for (ProcessActionModel pam : model.getProcessActions()) {
_actionModels.put(pam.getName(), pam);
}
}
private final KnowledgeBase getKnowledgeBase() {
final KnowledgeAgent ka = this.getKnowledgeAgent();
assert ka != null;
return ka.getKnowledgeBase();
}
public DiagramInfo getDiagramInfo(String processId) {
if (kbase == null) {
GuvnorConnectionUtils guvnorUtils = new GuvnorConnectionUtils();
if (guvnorUtils.guvnorExists()) {
try {
KnowledgeAgent kagent = KnowledgeAgentFactory.newKnowledgeAgent("Guvnor default");
kagent.applyChangeSet(ResourceFactory.newReaderResource(guvnorUtils.createChangeSet()));
kagent.monitorResourceChangeEvents(false);
kbase = kagent.getKnowledgeBase();
} catch (Throwable t) {
logger.error("Could not build kbase from Guvnor assets: " + t.getMessage());
}
} else {
logger.warn("Could not connect to Guvnor.");
}
if (kbase == null) {
kbase = KnowledgeBaseFactory.newKnowledgeBase();
}
String directory = System.getProperty("jbpm.console.directory");
if (directory == null) {
logger.error("jbpm.console.directory property not found");
} else {
File file = new File(directory);
if (!file.exists()) {
throw new IllegalArgumentException("Could not find " + directory);
}
if (!file.isDirectory()) {
throw new IllegalArgumentException(directory + " is not a directory");
}
ProcessBuilderFactory.setProcessBuilderFactoryService(
new ProcessBuilderFactoryServiceImpl());
ProcessMarshallerFactory.setProcessMarshallerFactoryService(
new ProcessMarshallerFactoryServiceImpl());
ProcessRuntimeFactory.setProcessRuntimeFactoryService(
new ProcessRuntimeFactoryServiceImpl());
BPMN2ProcessFactory.setBPMN2ProcessProvider(new BPMN2ProcessProviderImpl());
KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
for (File subfile :
file.listFiles(
new FilenameFilter() {
public boolean accept(File dir, String name) {
return name.endsWith(".bpmn") || name.endsWith("bpmn2");
}
})) {
kbuilder.add(ResourceFactory.newFileResource(subfile), ResourceType.BPMN2);
}
kbase.addKnowledgePackages(kbuilder.getKnowledgePackages());
}
}
Process process = kbase.getProcess(processId);
if (process == null) {
return null;
}
DiagramInfo result = new DiagramInfo();
// TODO: diagram width and height?
result.setWidth(932);
result.setHeight(541);
List<DiagramNodeInfo> nodeList = new ArrayList<DiagramNodeInfo>();
if (process instanceof WorkflowProcess) {
addNodesInfo(nodeList, ((WorkflowProcess) process).getNodes(), "id=");
}
result.setNodeList(nodeList);
return result;
}
