@Override
public ILock acquireLock(final ILockKey lockKey, final String user) throws LockException {
return storage.write(
storeProvider -> {
LockStore.Mutable lockStore = storeProvider.getLockStore();
Optional<ILock> existingLock = lockStore.fetchLock(lockKey);
if (existingLock.isPresent()) {
throw new LockException(
String.format(
"Operation for: %s is already in progress. Started at: %s. Current owner: %s.",
formatLockKey(lockKey),
new Date(existingLock.get().getTimestampMs()).toString(),
existingLock.get().getUser()));
}
ILock lock =
ILock.build(
new Lock()
.setKey(lockKey.newBuilder())
.setToken(tokenGenerator.createNew().toString())
.setTimestampMs(clock.nowMillis())
.setUser(user));
lockStore.saveLock(lock);
return lock;
});
}
/**
* Generates a time-based UUID (similar to Flake IDs), which is preferred when generating an ID to
* be indexed into a Lucene index as primary key. The id is opaque and the implementation is free
* to change at any time!
*/
public static String base64UUID() {
return TIME_UUID_GENERATOR.getBase64UUID();
}
public static Result index() {
LOG.info("this is home:" + request().toString());
UUIDGenerator uuid = UUIDGenerator.findByUDID(request().username());
return ok(home.render(uuid.getUser().getUsername()));
}