Examples with ManagedLock org.exist.storage.lock.ManagedLock used on opensource projects

Example 1 with ManagedLock

use of org.exist.storage.lock.ManagedLock in project exist by eXist-db.

the class MemoryContentsImpl method read.

@Override
public int read(byte[] dst, long position, int off, int len) {
    try (ManagedLock lock = readLock()) {
        if (position >= size) {
            return -1;
        }
        int toRead = (int) min(min(size - position, len), Integer.MAX_VALUE);
        int currentBlock = (int) (position / BLOCK_SIZE);
        int startIndexInBlock = (int) (position - (currentBlock * (long) BLOCK_SIZE));
        int read = 0;
        while (read < toRead) {
            int lengthInBlock = min(BLOCK_SIZE - startIndexInBlock, toRead - read);
            byte[] block = getBlock(currentBlock);
            System.arraycopy(block, startIndexInBlock, dst, off + read, lengthInBlock);
            read += lengthInBlock;
            startIndexInBlock = 0;
            currentBlock += 1;
        }
        return read;
    }
}

Example 2 with ManagedLock

use of org.exist.storage.lock.ManagedLock in project exist by eXist-db.

the class SecurityManagerImpl method processParameter.

@Override
public void processParameter(final DBBroker broker, final DocumentImpl document) throws ConfigurationException {
    XmldbURI uri = document.getCollection().getURI();
    final boolean isRemoved = uri.endsWith(SecurityManager.REMOVED_COLLECTION_URI);
    if (isRemoved) {
        uri = uri.removeLastSegment();
    }
    final boolean isAccount = uri.endsWith(SecurityManager.ACCOUNTS_COLLECTION_URI);
    final boolean isGroup = uri.endsWith(SecurityManager.GROUPS_COLLECTION_URI);
    if (isAccount || isGroup) {
        uri = uri.removeLastSegment();
        final String realmId = uri.lastSegment().toString();
        final AbstractRealm realm = (AbstractRealm) findRealmForRealmId(realmId);
        final Configuration conf = Configurator.parse(broker.getBrokerPool(), document);
        Integer id = -1;
        if (isRemoved) {
            id = conf.getPropertyInteger("id");
        }
        final String name = conf.getProperty("name");
        if (isAccount) {
            if (isRemoved && id > 2 && !hasUser(id)) {
                final AccountImpl account = new AccountImpl(realm, conf);
                account.removed = true;
                registerAccount(account);
            } else if (name != null) {
                if (realm.hasAccount(name)) {
                    final Integer oldId = saving.get(document.getURI());
                    final Integer newId = conf.getPropertyInteger("id");
                    if (!newId.equals(oldId)) {
                        final Account current = realm.getAccount(name);
                        try (final ManagedLock<ReadWriteLock> lock = ManagedLock.acquire(accountLocks.getLock(current), LockMode.WRITE_LOCK)) {
                            usersById.write(principalDb -> {
                                principalDb.remove(oldId);
                                principalDb.put(newId, current);
                            });
                        }
                    }
                } else {
                    final Account account = new AccountImpl(realm, conf);
                    if (account.getGroups().length == 0) {
                        try {
                            account.setPrimaryGroup(realm.getGroup(SecurityManager.UNKNOWN_GROUP));
                            LOG.warn("Account '{}' has no groups, but every account must have at least 1 group. Assigned group: " + SecurityManager.UNKNOWN_GROUP, account.getName());
                        } catch (final PermissionDeniedException e) {
                            throw new ConfigurationException("Account has no group, unable to default to " + SecurityManager.UNKNOWN_GROUP + ": " + e.getMessage(), e);
                        }
                    }
                    registerAccount(account);
                    realm.registerAccount(account);
                }
            } else {
                // this can't be! log any way
                LOG.error("Account '{}' already exists in realm: '{}', but received notification that a new one was created.", name, realmId);
            }
        } else if (isGroup) {
            if (isRemoved && id > 2 && !hasGroup(id)) {
                final GroupImpl group = new GroupImpl(realm, conf);
                group.removed = true;
                registerGroup(group);
            } else if (name != null && !realm.hasGroup(name)) {
                final GroupImpl group = new GroupImpl(realm, conf);
                registerGroup(group);
                realm.registerGroup(group);
            } else {
                // this can't be! log any way
                LOG.error("Group '{}' already exists in realm: '{}', but received notification that a new one was created.", name, realmId);
            }
        }
        saving.remove(document.getURI());
    }
}

Example 3 with ManagedLock

use of org.exist.storage.lock.ManagedLock in project exist by eXist-db.

the class MemoryContentsImpl method transferTo.

@Override
public long transferTo(OutputStream target, long position) throws IOException {
    try (ManagedLock lock = readLock()) {
        long transferred = 0L;
        long toTransfer = size - position;
        int currentBlock = (int) (position / BLOCK_SIZE);
        int startIndexInBlock = (int) (position - (currentBlock * (long) BLOCK_SIZE));
        while (transferred < toTransfer) {
            int lengthInBlock = (int) min(BLOCK_SIZE - startIndexInBlock, toTransfer - transferred);
            byte[] block = getBlock(currentBlock);
            target.write(block, startIndexInBlock, lengthInBlock);
            transferred += lengthInBlock;
            startIndexInBlock = 0;
            currentBlock += 1;
        }
        return transferred;
    }
}

Example 4 with ManagedLock

use of org.exist.storage.lock.ManagedLock in project exist by eXist-db.

the class MemoryContentsImpl method write.

@Override
public int write(byte[] src, long position, int off, int len) {
    try (ManagedLock lock = writeLock()) {
        ensureCapacity(position + len);
        int toWrite = min(len, Integer.MAX_VALUE);
        int currentBlock = (int) (position / BLOCK_SIZE);
        int startIndexInBlock = (int) (position - (currentBlock * (long) BLOCK_SIZE));
        int written = 0;
        while (written < toWrite) {
            int lengthInBlock = min(BLOCK_SIZE - startIndexInBlock, toWrite - written);
            byte[] block = getBlock(currentBlock);
            System.arraycopy(src, off + written, block, startIndexInBlock, lengthInBlock);
            written += lengthInBlock;
            startIndexInBlock = 0;
            currentBlock += 1;
        }
        // REVIEW, possibility to fill with random data
        size = max(size, position + written);
        return written;
    }
}