| /* |
| * 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.impl.list; |
| |
| import java.util.function.BiConsumer; |
| import java.util.function.Consumer; |
| |
| import accord.api.Agent; |
| import accord.api.Result; |
| import accord.impl.mock.Network; |
| import accord.local.Command; |
| import accord.local.Node; |
| import accord.primitives.Keys; |
| import accord.primitives.Ranges; |
| import accord.primitives.Seekables; |
| import accord.primitives.Timestamp; |
| import accord.primitives.Txn; |
| import accord.primitives.TxnId; |
| |
| import static accord.local.Node.Id.NONE; |
| import static accord.utils.Invariants.checkState; |
| import static com.google.common.base.Functions.identity; |
| |
| public class ListAgent implements Agent |
| { |
| final long timeout; |
| final Consumer<Throwable> onFailure; |
| final Consumer<Runnable> retryBootstrap; |
| final BiConsumer<Timestamp, Ranges> onStale; |
| |
| public ListAgent(long timeout, Consumer<Throwable> onFailure, Consumer<Runnable> retryBootstrap, BiConsumer<Timestamp, Ranges> onStale) |
| { |
| this.timeout = timeout; |
| this.onFailure = onFailure; |
| this.retryBootstrap = retryBootstrap; |
| this.onStale = onStale; |
| } |
| |
| @Override |
| public void onRecover(Node node, Result success, Throwable fail) |
| { |
| if (fail != null) |
| { |
| checkState(success == null, "fail (%s) and success (%s) are both not null", fail, success); |
| // We don't really process errors for Recover here even though it is provided in the interface |
| } |
| if (success != null) |
| { |
| ListResult result = (ListResult) success; |
| if (result.requestId > Integer.MIN_VALUE) |
| node.reply(result.client, Network.replyCtxFor(result.requestId), result, null); |
| } |
| } |
| |
| @Override |
| public void onInconsistentTimestamp(Command command, Timestamp prev, Timestamp next) |
| { |
| throw new AssertionError("Inconsistent execution timestamp detected for command " + command + ": " + prev + " != " + next); |
| } |
| |
| @Override |
| public void onFailedBootstrap(String phase, Ranges ranges, Runnable retry, Throwable failure) |
| { |
| retryBootstrap.accept(retry); |
| } |
| |
| @Override |
| public void onStale(Timestamp staleSince, Ranges ranges) |
| { |
| onStale.accept(staleSince, ranges); |
| } |
| |
| @Override |
| public void onUncaughtException(Throwable t) |
| { |
| onFailure.accept(t); |
| } |
| |
| @Override |
| public void onHandledException(Throwable t) |
| { |
| } |
| |
| @Override |
| public boolean isExpired(TxnId initiated, long now) |
| { |
| return now - initiated.hlc() >= timeout && !initiated.kind().isSyncPoint(); |
| } |
| |
| @Override |
| public Txn emptyTxn(Txn.Kind kind, Seekables<?, ?> keysOrRanges) |
| { |
| return new Txn.InMemory(kind, keysOrRanges, new ListRead(identity(), false, Keys.EMPTY, Keys.EMPTY), new ListQuery(NONE, Integer.MIN_VALUE), null); |
| } |
| |
| public boolean collectMaxApplied() |
| { |
| // TODO (expected): randomise this to exercise both code paths |
| return false; |
| } |
| } |