| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package accord.coordinate; |
| |
| import java.util.function.BiConsumer; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import accord.api.Result; |
| import accord.coordinate.tracking.QuorumTracker; |
| import accord.coordinate.tracking.RequestStatus; |
| import accord.local.Node; |
| import accord.local.Node.Id; |
| import accord.messages.Callback; |
| import accord.messages.Commit; |
| import accord.messages.ReadData.CommitOrReadNack; |
| import accord.messages.ReadData.ReadReply; |
| import accord.primitives.Deps; |
| import accord.primitives.FullRoute; |
| import accord.primitives.Txn; |
| import accord.primitives.TxnId; |
| import accord.topology.Topologies; |
| |
| import static accord.coordinate.tracking.RequestStatus.Failed; |
| import static accord.utils.Invariants.illegalState; |
| |
| /** |
| * Block on deps at quorum for a sync point transaction, and then move the transaction to the applied state |
| */ |
| public class BlockOnDeps implements Callback<ReadReply> |
| { |
| @SuppressWarnings("unused") |
| private static final Logger logger = LoggerFactory.getLogger(BlockOnDeps.class); |
| |
| final Node node; |
| final TxnId txnId; |
| final Txn txn; |
| final FullRoute<?> route; |
| final Deps deps; |
| final Topologies blockOn; |
| final QuorumTracker tracker; |
| final BiConsumer<? super Result, Throwable> callback; |
| |
| private boolean isDone = false; |
| |
| private BlockOnDeps(Node node, TxnId txnId, Txn txn, FullRoute<?> route, Deps deps, BiConsumer<? super Result, Throwable> callback) |
| { |
| this.node = node; |
| this.txnId = txnId; |
| this.txn = txn; |
| this.route = route; |
| this.deps = deps; |
| this.blockOn = node.topology().forEpoch(route, txnId.epoch()); |
| this.tracker = new QuorumTracker(blockOn); |
| this.callback = callback; |
| } |
| |
| public static void blockOnDeps(Node node, TxnId txnId, Txn txn, FullRoute<?> route, Deps deps, BiConsumer<? super Result, Throwable> callback) |
| { |
| BlockOnDeps blockOnDeps = new BlockOnDeps(node, txnId, txn, route, deps, callback); |
| blockOnDeps.start(); |
| } |
| |
| void start() |
| { |
| Commit.stableMaximalAndBlockOnDeps(node, tracker.topologies(), txnId, txn, route, txnId, deps, this); |
| } |
| |
| @Override |
| public void onSuccess(Id from, ReadReply reply) |
| { |
| if (isDone) |
| return; |
| |
| if (reply.isOk()) |
| { |
| if (tracker.recordSuccess(from) == RequestStatus.Success) |
| { |
| isDone = true; |
| callback.accept(txn.result(txnId, txnId, null), null); |
| } |
| return; |
| } |
| |
| CommitOrReadNack nack = (CommitOrReadNack) reply; |
| switch (nack) |
| { |
| default: throw illegalState(); |
| case Redundant: |
| // WaitUntilApplied only sends Redundant on truncation which implies durable and applied |
| isDone = true; |
| callback.accept(txn.result(txnId, txnId, null), null); |
| break; |
| case Insufficient: |
| throw illegalState("Received `NotCommitted` response after sending maximal stable as part of `BlockOnDeps`"); |
| case Invalid: |
| onFailure(from, illegalState("Submitted a read command to a replica that did not own the range")); |
| break; |
| } |
| } |
| |
| @Override |
| public void onFailure(Id from, Throwable failure) |
| { |
| if (tracker.recordFailure(from) == Failed) |
| { |
| isDone = true; |
| callback.accept(null, failure); |
| } |
| } |
| |
| @Override |
| public void onCallbackFailure(Id from, Throwable failure) |
| { |
| isDone = true; |
| callback.accept(null, failure); |
| } |
| } |