private static final Logger LOG = LoggerFactory.getLogger(LeaderFrontendState.class);
// Histories which have not been purged
- private final Map<LocalHistoryIdentifier, LocalFrontendHistory> localHistories = new HashMap<>();
+ private final Map<LocalHistoryIdentifier, LocalFrontendHistory> localHistories;
// RangeSet performs automatic merging, hence we keep minimal state tracking information
- private final RangeSet<UnsignedLong> purgedHistories = TreeRangeSet.create();
+ private final RangeSet<UnsignedLong> purgedHistories;
// Used for all standalone transactions
private final AbstractFrontendHistory standaloneHistory;
private long expectedTxSequence;
private Long lastSeenHistory = null;
-
// TODO: explicit failover notification
// Record the ActorRef for the originating actor and when we switch to being a leader send a notification
// to the frontend client -- that way it can immediately start sending requests
// - per-RequestException throw counters
LeaderFrontendState(final String persistenceId, final ClientIdentifier clientId, final ShardDataTree tree) {
+ this(persistenceId, clientId, tree, TreeRangeSet.create(), StandaloneFrontendHistory.create(persistenceId,
+ clientId, tree), new HashMap<>());
+ }
+
+ LeaderFrontendState(final String persistenceId, final ClientIdentifier clientId, final ShardDataTree tree,
+ final RangeSet<UnsignedLong> purgedHistories, final AbstractFrontendHistory standaloneHistory,
+ final Map<LocalHistoryIdentifier, LocalFrontendHistory> localHistories) {
this.persistenceId = Preconditions.checkNotNull(persistenceId);
this.clientId = Preconditions.checkNotNull(clientId);
this.tree = Preconditions.checkNotNull(tree);
- standaloneHistory = new StandaloneFrontendHistory(persistenceId, tree.ticker(), clientId, tree);
+ this.purgedHistories = Preconditions.checkNotNull(purgedHistories);
+ this.standaloneHistory = Preconditions.checkNotNull(standaloneHistory);
+ this.localHistories = Preconditions.checkNotNull(localHistories);
}
@Override
if (request instanceof CreateLocalHistoryRequest) {
return handleCreateHistory((CreateLocalHistoryRequest) request);
} else if (request instanceof DestroyLocalHistoryRequest) {
- return handleDestroyHistory((DestroyLocalHistoryRequest) request, now);
+ return handleDestroyHistory((DestroyLocalHistoryRequest) request, envelope, now);
} else if (request instanceof PurgeLocalHistoryRequest) {
- return handlePurgeHistory((PurgeLocalHistoryRequest)request, now);
+ return handlePurgeHistory((PurgeLocalHistoryRequest)request, envelope, now);
} else {
+ LOG.warn("{}: rejecting unsupported request {}", persistenceId, request);
throw new UnsupportedRequestException(request);
}
} finally {
}
// Update last history we have seen
- if (lastSeenHistory != null && Long.compareUnsigned(lastSeenHistory, id.getHistoryId()) < 0) {
+ if (lastSeenHistory == null || Long.compareUnsigned(lastSeenHistory, id.getHistoryId()) < 0) {
lastSeenHistory = id.getHistoryId();
}
- localHistories.put(id, new LocalFrontendHistory(persistenceId, tree.ticker(), tree.ensureTransactionChain(id)));
+ localHistories.put(id, LocalFrontendHistory.create(persistenceId, tree, id));
LOG.debug("{}: created history {}", persistenceId, id);
return new LocalHistorySuccess(id, request.getSequence());
}
- private LocalHistorySuccess handleDestroyHistory(final DestroyLocalHistoryRequest request, final long now)
+ private LocalHistorySuccess handleDestroyHistory(final DestroyLocalHistoryRequest request,
+ final RequestEnvelope envelope, final long now)
throws RequestException {
final LocalHistoryIdentifier id = request.getTarget();
final LocalFrontendHistory existing = localHistories.get(id);
return new LocalHistorySuccess(id, request.getSequence());
}
- return existing.destroy(request.getSequence(), now);
+ existing.destroy(request.getSequence(), envelope, now);
+ return null;
}
- private LocalHistorySuccess handlePurgeHistory(final PurgeLocalHistoryRequest request, final long now)
- throws RequestException {
+ private LocalHistorySuccess handlePurgeHistory(final PurgeLocalHistoryRequest request,
+ final RequestEnvelope envelope, final long now) throws RequestException {
final LocalHistoryIdentifier id = request.getTarget();
final LocalFrontendHistory existing = localHistories.remove(id);
- if (existing != null) {
- purgedHistories.add(Range.singleton(UnsignedLong.fromLongBits(id.getHistoryId())));
-
- if (!existing.isDestroyed()) {
- LOG.warn("{}: purging undestroyed history {}", persistenceId, id);
- existing.destroy(request.getSequence(), now);
- }
-
- // FIXME: record a PURGE tombstone in the journal
-
- LOG.debug("{}: purged history {}", persistenceId, id);
- } else {
+ if (existing == null) {
LOG.debug("{}: history {} has already been purged", persistenceId, id);
+ return new LocalHistorySuccess(id, request.getSequence());
}
- return new LocalHistorySuccess(id, request.getSequence());
+ LOG.debug("{}: purging history {}", persistenceId, id);
+ purgedHistories.add(Range.singleton(UnsignedLong.fromLongBits(id.getHistoryId())));
+ existing.purge(request.getSequence(), envelope, now);
+ return null;
}
@Nullable TransactionSuccess<?> handleTransactionRequest(final TransactionRequest<?> request,