Examples with ZooKeeperClient org.apache.distributedlog.ZooKeeperClient used on opensource projects

Example 16 with ZooKeeperClient

use of org.apache.distributedlog.ZooKeeperClient in project bookkeeper by apache.

the class BKNamespaceDriver method enumerateLogsWithMetadataInNamespace.

public Map<String, byte[]> enumerateLogsWithMetadataInNamespace() throws IOException, IllegalArgumentException {
    String namespaceRootPath = namespace.getPath();
    HashMap<String, byte[]> result = new HashMap<String, byte[]>();
    ZooKeeperClient zkc = writerZKC;
    try {
        ZooKeeper zk = Utils.sync(zkc, namespaceRootPath);
        Stat currentStat = zk.exists(namespaceRootPath, false);
        if (currentStat == null) {
            return result;
        }
        List<String> children = zk.getChildren(namespaceRootPath, false);
        for (String child : children) {
            if (isReservedStreamName(child)) {
                continue;
            }
            String zkPath = String.format("%s/%s", namespaceRootPath, child);
            currentStat = zk.exists(zkPath, false);
            if (currentStat == null) {
                result.put(child, new byte[0]);
            } else {
                result.put(child, zk.getData(zkPath, false, currentStat));
            }
        }
    } catch (InterruptedException ie) {
        Thread.currentThread().interrupt();
        LOG.error("Interrupted while deleting " + namespaceRootPath, ie);
        throw new IOException("Interrupted while reading " + namespaceRootPath, ie);
    } catch (KeeperException ke) {
        LOG.error("Error reading" + namespaceRootPath + "entry in zookeeper", ke);
        throw new IOException("Error reading" + namespaceRootPath + "entry in zookeeper", ke);
    }
    return result;
}