Examples with Notification org.apache.pulsar.metadata.api.Notification used on opensource projects

Example 11 with Notification

use of org.apache.pulsar.metadata.api.Notification in project incubator-pulsar by apache.

the class RocksdbMetadataStore method storePut.

@Override
protected CompletableFuture<Stat> storePut(String path, byte[] data, Optional<Long> expectedVersion, EnumSet<CreateOption> options) {
    if (log.isDebugEnabled()) {
        log.debug("storePut.path={},instanceId={}", path, instanceId);
    }
    try {
        dbStateLock.readLock().lock();
        if (state == State.CLOSED) {
            throw new MetadataStoreException.AlreadyClosedException("");
        }
        try (Transaction transaction = db.beginTransaction(optionSync)) {
            byte[] pathBytes = toBytes(path);
            byte[] oldValueData = transaction.getForUpdate(optionDontCache, pathBytes, false);
            MetaValue metaValue = MetaValue.parse(oldValueData);
            if (expectedVersion.isPresent()) {
                if (metaValue == null && expectedVersion.get() != -1 || metaValue != null && !expectedVersion.get().equals(metaValue.getVersion())) {
                    throw new MetadataStoreException.BadVersionException(String.format("Version mismatch, actual=%s, expect=%s", metaValue == null ? null : metaValue.getVersion(), expectedVersion.get()));
                }
            }
            boolean created = false;
            long timestamp = System.currentTimeMillis();
            if (metaValue == null) {
                // create new node
                metaValue = new MetaValue();
                metaValue.version = 0;
                metaValue.createdTimestamp = timestamp;
                metaValue.ephemeral = options.contains(CreateOption.Ephemeral);
                if (options.contains(CreateOption.Sequential)) {
                    path += sequentialIdGenerator.getAndIncrement();
                    pathBytes = toBytes(path);
                    transaction.put(SEQUENTIAL_ID_KEY, toBytes(sequentialIdGenerator.get()));
                }
                created = true;
            } else {
                // update old node
                metaValue.version++;
            }
            metaValue.modifiedTimestamp = timestamp;
            metaValue.owner = instanceId;
            metaValue.data = data;
            // handle Sequential
            transaction.put(pathBytes, metaValue.serialize());
            transaction.commit();
            receivedNotification(new Notification(created ? NotificationType.Created : NotificationType.Modified, path));
            if (created) {
                notifyParentChildrenChanged(path);
            }
            return CompletableFuture.completedFuture(new Stat(path, metaValue.version, metaValue.createdTimestamp, metaValue.modifiedTimestamp, metaValue.ephemeral, true));
        }
    } catch (Throwable e) {
        return FutureUtil.failedFuture(MetadataStoreException.wrap(e));
    } finally {
        dbStateLock.readLock().unlock();
    }
}

Example 12 with Notification

use of org.apache.pulsar.metadata.api.Notification in project incubator-pulsar by apache.

the class LocalMemoryMetadataStore method storePut.

@Override
public CompletableFuture<Stat> storePut(String path, byte[] data, Optional<Long> optExpectedVersion, EnumSet<CreateOption> options) {
    if (!isValidPath(path)) {
        return FutureUtil.failedFuture(new MetadataStoreException.InvalidPathException(path));
    }
    synchronized (map) {
        boolean hasVersion = optExpectedVersion.isPresent();
        int expectedVersion = optExpectedVersion.orElse(-1L).intValue();
        if (options.contains(CreateOption.Sequential)) {
            path += Long.toString(sequentialIdGenerator.getAndIncrement());
        }
        long now = System.currentTimeMillis();
        if (hasVersion && expectedVersion == -1) {
            Value newValue = new Value(0, data, now, now, options.contains(CreateOption.Ephemeral));
            Value existingValue = map.putIfAbsent(path, newValue);
            if (existingValue != null) {
                return FutureUtils.exception(new BadVersionException(""));
            } else {
                receivedNotification(new Notification(NotificationType.Created, path));
                notifyParentChildrenChanged(path);
                return FutureUtils.value(new Stat(path, 0, now, now, newValue.isEphemeral(), true));
            }
        } else {
            Value existingValue = map.get(path);
            long existingVersion = existingValue != null ? existingValue.version : -1;
            if (hasVersion && expectedVersion != existingVersion) {
                return FutureUtils.exception(new BadVersionException(""));
            } else {
                long newVersion = existingValue != null ? existingValue.version + 1 : 0;
                long createdTimestamp = existingValue != null ? existingValue.createdTimestamp : now;
                Value newValue = new Value(newVersion, data, createdTimestamp, now, options.contains(CreateOption.Ephemeral));
                map.put(path, newValue);
                NotificationType type = existingValue == null ? NotificationType.Created : NotificationType.Modified;
                receivedNotification(new Notification(type, path));
                if (type == NotificationType.Created) {
                    notifyParentChildrenChanged(path);
                }
                return FutureUtils.value(new Stat(path, newValue.version, newValue.createdTimestamp, newValue.modifiedTimestamp, false, true));
            }
        }
    }
}

Example 13 with Notification

use of org.apache.pulsar.metadata.api.Notification in project incubator-pulsar by apache.

the class RocksdbMetadataStore method storeDelete.

@Override
protected CompletableFuture<Void> storeDelete(String path, Optional<Long> expectedVersion) {
    if (log.isDebugEnabled()) {
        log.debug("storeDelete.path={},instanceId={}", path, instanceId);
    }
    try {
        dbStateLock.readLock().lock();
        if (state == State.CLOSED) {
            throw new MetadataStoreException.AlreadyClosedException("");
        }
        try (Transaction transaction = db.beginTransaction(optionSync)) {
            byte[] pathBytes = toBytes(path);
            byte[] oldValueData = transaction.getForUpdate(optionDontCache, pathBytes, false);
            MetaValue metaValue = MetaValue.parse(oldValueData);
            if (metaValue == null) {
                throw new MetadataStoreException.NotFoundException(String.format("path %s not found.", path));
            }
            if (expectedVersion.isPresent() && !expectedVersion.get().equals(metaValue.getVersion())) {
                throw new MetadataStoreException.BadVersionException(String.format("Version mismatch, actual=%s, expect=%s", metaValue.getVersion(), expectedVersion.get()));
            }
            transaction.delete(pathBytes);
            transaction.commit();
            receivedNotification(new Notification(NotificationType.Deleted, path));
            notifyParentChildrenChanged(path);
            return CompletableFuture.completedFuture(null);
        }
    } catch (Throwable e) {
        return FutureUtil.failedFuture(MetadataStoreException.wrap(e));
    } finally {
        dbStateLock.readLock().unlock();
    }
}

Example 14 with Notification

use of org.apache.pulsar.metadata.api.Notification in project incubator-pulsar by apache.

the class ZKMetadataStore method handleWatchEvent.

private void handleWatchEvent(WatchedEvent event) {
    if (log.isDebugEnabled()) {
        log.debug("Received ZK watch : {}", event);
    }
    String path = event.getPath();
    if (path == null) {
        // Ignore Session events
        return;
    }
    String parent = parent(path);
    Notification childrenChangedNotification = null;
    NotificationType type;
    switch(event.getType()) {
        case NodeCreated:
            type = NotificationType.Created;
            if (parent != null) {
                childrenChangedNotification = new Notification(NotificationType.ChildrenChanged, parent);
            }
            break;
        case NodeDataChanged:
            type = NotificationType.Modified;
            break;
        case NodeChildrenChanged:
            type = NotificationType.ChildrenChanged;
            break;
        case NodeDeleted:
            type = NotificationType.Deleted;
            if (parent != null) {
                childrenChangedNotification = new Notification(NotificationType.ChildrenChanged, parent);
            }
            break;
        default:
            return;
    }
    receivedNotification(new Notification(type, event.getPath()));
    if (childrenChangedNotification != null) {
        receivedNotification(childrenChangedNotification);
    }
}

Example 15 with Notification

use of org.apache.pulsar.metadata.api.Notification in project incubator-pulsar by apache.

the class AbstractMetadataStore method notifyParentChildrenChanged.

protected void notifyParentChildrenChanged(String path) {
    String parent = parent(path);
    while (parent != null) {
        receivedNotification(new Notification(NotificationType.ChildrenChanged, parent));
        parent = parent(parent);
    }
}