// TODO: IS THIS THE RIGHT WAY TO HANDLE CONCURRENCY?
public CommunityRun addRunnerToCommunityRun(final String slug, final Profile profile) {
CommunityRun communityRun = this.findBySlugWithPessimisticWriteLock(slug);
communityRun.getRunners().add(profile);
entityManager.merge(communityRun);
entityManager.flush();
return communityRun;
}
public Set<Profile> allRunners(@NotNull final String slug) {
CommunityRun communityRun = this.find(slug);
if (communityRun == null) {
return emptySet();
}
Set<Profile> runners = communityRun.getRunners();
if (runners.isEmpty()) {
return emptySet();
}
return unmodifiableSet(runners);
}
public Set<Profile> findAllRunners(@NotNull final String slug) {
final String communityRunBySlugQuery = "SELECT cr FROM CommunityRun cr WHERE cr.slug =:slug";
TypedQuery<CommunityRun> query =
entityManager
.createQuery(communityRunBySlugQuery, CommunityRun.class)
.setParameter("slug", slug);
try {
CommunityRun communityRun = query.getSingleResult();
Set<Profile> profiles = communityRun.getRunners();
profiles.size();
return profiles;
} catch (NoResultException e) {
throw new NoRecordExistsException(String.format("No community run exists for slug %s", slug));
}
}
public Long save(CommunityRun communityRun) {
entityManager.persist(communityRun);
return communityRun.getId();
}
public void leaveCommunityRun(final String slug, final Profile profile) {
CommunityRun communityRun = this.findBySlugWithPessimisticWriteLock(slug);
communityRun.getRunners().remove(profile);
entityManager.merge(communityRun);
entityManager.flush();
}
