public WorkItemInfo merge(WorkItemInfo workItemInfo) {
if (this.pessimisticLocking) {
if (em.contains(workItemInfo)) {
em.lock(workItemInfo, LockModeType.PESSIMISTIC_FORCE_INCREMENT);
} else {
// Yes, this is a hack, but for detached entities, it's the only way to lock before merging
WorkItemInfo dbWorkItemInfo =
em.find(
WorkItemInfo.class, workItemInfo.getId(), LockModeType.PESSIMISTIC_FORCE_INCREMENT);
for (Field field : WorkItemInfo.class.getDeclaredFields()) {
boolean access = field.isAccessible();
field.setAccessible(true);
try {
field.set(dbWorkItemInfo, field.get(workItemInfo));
} catch (Exception e) {
logger.error(
"Unable to set field " + field.getName() + " of unmerged WorkItemInfo instance!",
e);
}
field.setAccessible(access);
}
}
}
return em.merge(workItemInfo);
}
public WorkItemInfo persist(WorkItemInfo workItemInfo) {
em.persist(workItemInfo);
if (this.pessimisticLocking) {
return em.find(
WorkItemInfo.class, workItemInfo.getId(), LockModeType.PESSIMISTIC_FORCE_INCREMENT);
}
return workItemInfo;
}
public void commit(boolean transactionOwner) {
// Do not check if the caller is the transactionOwner
// because there's no need to "wait" for a commit
try {
for (SessionInfo sessionInfo : session.getStoredKnowledgeSessions()) {
sessionInfo.transform();
storage.saveOrUpdate(sessionInfo);
}
for (WorkItemInfo workItemInfo : session.getStoredWorkItems()) {
workItemInfo.transform();
storage.saveOrUpdate(workItemInfo);
}
try {
transactionSynchronization.afterCompletion(TransactionManager.STATUS_COMMITTED);
} catch (RuntimeException re) {
logger.warn("Unable to synchronize transaction after commit, see cause.", re);
}
} catch (RuntimeException re) {
transactionSynchronization.afterCompletion(TransactionManager.STATUS_ROLLEDBACK);
}
// We shouldn't clear session here because by doing so
// we lose track of this objects on successive interactions
}
public void remove(WorkItemInfo workItemInfo) {
workItems.remove(workItemInfo.getId());
}
public void saveOrUpdate(WorkItemInfo workItemInfo) {
workItems.put(workItemInfo.getId(), workItemInfo);
}