| /* |
| * 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.ignite.internal.cluster.management.raft; |
| |
| import static java.util.stream.Collectors.toList; |
| import static org.apache.ignite.internal.util.CompletableFutures.nullCompletedFuture; |
| import static org.apache.ignite.internal.util.IgniteUtils.inBusyLock; |
| import static org.apache.ignite.internal.util.IgniteUtils.inBusyLockAsync; |
| import static org.apache.ignite.internal.util.IgniteUtils.startsWith; |
| |
| import java.io.ObjectInputStream; |
| import java.io.ObjectOutputStream; |
| import java.nio.file.Files; |
| import java.nio.file.Path; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.concurrent.CompletableFuture; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.atomic.AtomicBoolean; |
| import java.util.concurrent.locks.ReadWriteLock; |
| import java.util.concurrent.locks.ReentrantReadWriteLock; |
| import java.util.function.BiFunction; |
| import java.util.function.Supplier; |
| import org.apache.ignite.internal.lang.ByteArray; |
| import org.apache.ignite.internal.util.IgniteSpinBusyLock; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * {@link ClusterStateStorage} in-memory implementation based on a {@link ConcurrentHashMap}. |
| */ |
| public class TestClusterStateStorage implements ClusterStateStorage { |
| private static final String SNAPSHOT_FILE = "snapshot.bin"; |
| |
| private final Map<ByteArray, byte[]> map = new HashMap<>(); |
| |
| private final ReadWriteLock lock = new ReentrantReadWriteLock(); |
| |
| private final IgniteSpinBusyLock busyLock = new IgniteSpinBusyLock(); |
| |
| /** Prevents double stopping of the component. */ |
| private final AtomicBoolean stopGuard = new AtomicBoolean(); |
| |
| @Override |
| public CompletableFuture<Void> start() { |
| return nullCompletedFuture(); |
| } |
| |
| @Override |
| public byte @Nullable [] get(byte[] key) { |
| return inBusyReadLock(() -> map.get(new ByteArray(key))); |
| } |
| |
| @Override |
| public void put(byte[] key, byte[] value) { |
| inBusyWriteLock(() -> map.put(new ByteArray(key), value)); |
| } |
| |
| @Override |
| public void replaceAll(byte[] prefix, byte[] key, byte[] value) { |
| inBusyWriteLock(() -> { |
| map.entrySet().removeIf(e -> startsWith(e.getKey().bytes(), prefix)); |
| |
| map.put(new ByteArray(key), value); |
| }); |
| } |
| |
| @Override |
| public void remove(byte[] key) { |
| inBusyWriteLock(() -> map.remove(new ByteArray(key))); |
| } |
| |
| @Override |
| public void removeAll(Collection<byte[]> keys) { |
| inBusyWriteLock(() -> keys.forEach(this::remove)); |
| } |
| |
| @Override |
| public <T> List<T> getWithPrefix(byte[] prefix, BiFunction<byte[], byte[], T> entryTransformer) { |
| return inBusyReadLock(() -> { |
| return map.entrySet().stream() |
| .filter(e -> startsWith(e.getKey().bytes(), prefix)) |
| .map(e -> entryTransformer.apply(e.getKey().bytes(), e.getValue())) |
| .collect(toList()); |
| }); |
| } |
| |
| @Override |
| public CompletableFuture<Void> snapshot(Path snapshotPath) { |
| return inBusyLockAsync(busyLock, () -> { |
| lock.readLock().lock(); |
| |
| try { |
| List<byte[]> keys = new ArrayList<>(map.size()); |
| List<byte[]> values = new ArrayList<>(map.size()); |
| |
| map.forEach((k, v) -> { |
| keys.add(k.bytes()); |
| values.add(v); |
| }); |
| |
| return CompletableFuture.runAsync(() -> { |
| try (var out = new ObjectOutputStream(Files.newOutputStream(snapshotPath.resolve(SNAPSHOT_FILE)))) { |
| out.writeObject(keys); |
| out.writeObject(values); |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| }); |
| } finally { |
| lock.readLock().unlock(); |
| } |
| }); |
| } |
| |
| @Override |
| public void restoreSnapshot(Path snapshotPath) { |
| inBusyWriteLock(() -> { |
| try (var in = new ObjectInputStream(Files.newInputStream(snapshotPath.resolve(SNAPSHOT_FILE)))) { |
| var keys = (List<byte[]>) in.readObject(); |
| var values = (List<byte[]>) in.readObject(); |
| |
| map.clear(); |
| |
| for (int i = 0; i < keys.size(); i++) { |
| map.put(new ByteArray(keys.get(i)), values.get(i)); |
| } |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| }); |
| } |
| |
| @Override |
| public void stop() { |
| if (!stopGuard.compareAndSet(false, true)) { |
| return; |
| } |
| |
| busyLock.block(); |
| } |
| |
| private <T> T inBusyReadLock(Supplier<T> action) { |
| return inBusyLock(busyLock, () -> { |
| lock.readLock().lock(); |
| |
| try { |
| return action.get(); |
| } finally { |
| lock.readLock().unlock(); |
| } |
| }); |
| } |
| |
| private void inBusyWriteLock(Runnable action) { |
| inBusyLock(busyLock, () -> { |
| lock.writeLock().lock(); |
| |
| try { |
| action.run(); |
| } finally { |
| lock.writeLock().unlock(); |
| } |
| }); |
| } |
| } |