Examples with KeyAlreadyExistsException com.palantir.atlasdb.keyvalue.api.KeyAlreadyExistsException used on opensource projects

Example 11 with KeyAlreadyExistsException

use of com.palantir.atlasdb.keyvalue.api.KeyAlreadyExistsException in project atlasdb by palantir.

the class PaxosTransactionService method putUnlessExists.

@Override
public void putUnlessExists(long startTimestamp, long commitTimestamp) throws KeyAlreadyExistsException {
    try {
        byte[] finalValue = proposer.propose(startTimestamp, PtBytes.toBytes(commitTimestamp));
        long finalCommitTs = PtBytes.toLong(finalValue);
        try {
            // Make sure we do this put before we return because we want #get to succeed.
            kvStore.putAll(ImmutableMap.of(startTimestamp, finalCommitTs));
        } catch (KeyAlreadyExistsException e) {
        // this case isn't worrisome
        }
        if (commitTimestamp != finalCommitTs) {
            throw new KeyAlreadyExistsException("Key " + startTimestamp + " already exists and is mapped to " + finalCommitTs);
        }
    } catch (PaxosRoundFailureException e) {
        throw new ServiceNotAvailableException("Could not store trascaction");
    }
}