public void initializeParamters(PluggableTaskDTO task) throws PluggableTaskException {
Collection<PluggableTaskParameterDTO> DBparameters = task.getParameters();
parameters = new HashMap<String, String>();
entityId = task.getEntityId();
this.task = task;
if (DBparameters.size() < task.getType().getMinParameters()) {
throw new PluggableTaskException(
"Type ["
+ task.getType().getClassName()
+ "] requires at least "
+ task.getType().getMinParameters()
+ " parameters."
+ DBparameters.size()
+ " found.");
}
if (DBparameters.isEmpty()) {
return;
}
for (PluggableTaskParameterDTO parameter : DBparameters) {
Object value = parameter.getIntValue();
if (value == null) {
value = parameter.getStrValue();
if (value == null) {
value = parameter.getFloatValue();
}
}
// change: all the parameters will be strings in jB3. TODO: drop the int_value, float_value
// columns
parameters.put(parameter.getName(), value.toString());
}
}
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();
}
public Integer getTaskId() {
return task.getId();
}