| /* |
| * 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 org.apache.cassandra.service.paxos.uncommitted; |
| |
| import java.util.*; |
| |
| import com.google.common.collect.Iterables; |
| import com.google.common.collect.Iterators; |
| |
| import org.apache.cassandra.db.DecoratedKey; |
| import org.apache.cassandra.db.PartitionPosition; |
| import org.apache.cassandra.db.memtable.Memtable; |
| import org.apache.cassandra.dht.Range; |
| import org.apache.cassandra.dht.Token; |
| import org.apache.cassandra.schema.TableId; |
| import org.apache.cassandra.service.paxos.Ballot; |
| import org.apache.cassandra.utils.CloseableIterator; |
| |
| public class PaxosMockUpdateSupplier implements PaxosUncommittedTracker.UpdateSupplier |
| { |
| private final Map<TableId, NavigableMap<PartitionPosition, PaxosKeyState>> states = new HashMap<>(); |
| |
| private NavigableMap<PartitionPosition, PaxosKeyState> mapFor(TableId tableId) |
| { |
| return states.computeIfAbsent(tableId, key -> new TreeMap<>()); |
| } |
| |
| private void updateTo(TableId tableId, PaxosKeyState newState) |
| { |
| NavigableMap<PartitionPosition, PaxosKeyState> map = mapFor(tableId); |
| PaxosKeyState current = map.get(newState.key); |
| if (current != null && PaxosKeyState.BALLOT_COMPARATOR.compare(current, newState) > 0) |
| return; |
| |
| map.put(newState.key, newState); |
| } |
| |
| void inProgress(TableId tableId, DecoratedKey key, Ballot ballot) |
| { |
| updateTo(tableId, new PaxosKeyState(tableId, key, ballot, false)); |
| } |
| |
| void committed(TableId tableId, DecoratedKey key, Ballot ballot) |
| { |
| updateTo(tableId, new PaxosKeyState(tableId, key, ballot, true)); |
| } |
| |
| public CloseableIterator<PaxosKeyState> repairIterator(TableId tableId, Collection<Range<Token>> ranges) |
| { |
| Iterator<PaxosKeyState> iterator = Iterators.filter(mapFor(tableId).values().iterator(), k -> Iterables.any(ranges, r -> r.contains(k.key.getToken()))); |
| |
| return new CloseableIterator<PaxosKeyState>() |
| { |
| public void close() {} |
| |
| public boolean hasNext() |
| { |
| return iterator.hasNext(); |
| } |
| |
| public PaxosKeyState next() |
| { |
| return iterator.next(); |
| } |
| }; |
| } |
| |
| public CloseableIterator<PaxosKeyState> flushIterator(Memtable memtable) |
| { |
| ArrayList<PaxosKeyState> keyStates = new ArrayList<>(); |
| for (Map.Entry<TableId, NavigableMap<PartitionPosition, PaxosKeyState>> statesEntry : states.entrySet()) |
| { |
| for (Map.Entry<PartitionPosition, PaxosKeyState> entry : statesEntry.getValue().entrySet()) |
| { |
| keyStates.add(entry.getValue()); |
| } |
| } |
| states.clear(); |
| |
| Iterator<PaxosKeyState> iterator = keyStates.iterator(); |
| |
| return new CloseableIterator<PaxosKeyState>() |
| { |
| public void close() {} |
| |
| public boolean hasNext() |
| { |
| return iterator.hasNext(); |
| } |
| |
| public PaxosKeyState next() |
| { |
| return iterator.next(); |
| } |
| }; |
| } |
| } |