Examples with RequestHeader org.apache.zookeeper.proto.RequestHeader used on opensource projects

Example 6 with RequestHeader

use of org.apache.zookeeper.proto.RequestHeader in project zookeeper by apache.

the class ZooKeeper method getChildren.

/**
     * For the given znode path return the stat and children list.
     * <p>
     * If the watch is non-null and the call is successful (no exception is thrown),
     * a watch will be left on the node with the given path. The watch willbe
     * triggered by a successful operation that deletes the node of the given
     * path or creates/delete a child under the node.
     * <p>
     * The list of children returned is not sorted and no guarantee is provided
     * as to its natural or lexical order.
     * <p>
     * A KeeperException with error code KeeperException.NoNode will be thrown
     * if no node with the given path exists.
     *
     * @since 3.3.0
     * 
     * @param path
     * @param watcher explicit watcher
     * @param stat stat of the znode designated by path
     * @return an unordered array of children of the node with the given path
     * @throws InterruptedException If the server transaction is interrupted.
     * @throws KeeperException If the server signals an error with a non-zero error code.
     * @throws IllegalArgumentException if an invalid path is specified
     */
public List<String> getChildren(final String path, Watcher watcher, Stat stat) throws KeeperException, InterruptedException {
    final String clientPath = path;
    PathUtils.validatePath(clientPath);
    // the watch contains the un-chroot path
    WatchRegistration wcb = null;
    if (watcher != null) {
        wcb = new ChildWatchRegistration(watcher, clientPath);
    }
    final String serverPath = prependChroot(clientPath);
    RequestHeader h = new RequestHeader();
    h.setType(ZooDefs.OpCode.getChildren2);
    GetChildren2Request request = new GetChildren2Request();
    request.setPath(serverPath);
    request.setWatch(watcher != null);
    GetChildren2Response response = new GetChildren2Response();
    ReplyHeader r = cnxn.submitRequest(h, request, response, wcb);
    if (r.getErr() != 0) {
        throw KeeperException.create(KeeperException.Code.get(r.getErr()), clientPath);
    }
    if (stat != null) {
        DataTree.copyStat(response.getStat(), stat);
    }
    return response.getChildren();
}

Example 7 with RequestHeader

use of org.apache.zookeeper.proto.RequestHeader in project zookeeper by apache.

the class ZooKeeper method getACL.

/**
     * Return the ACL and stat of the node of the given path.
     * <p>
     * A KeeperException with error code KeeperException.NoNode will be thrown
     * if no node with the given path exists.
     *
     * @param path
     *                the given path for the node
     * @param stat
     *                the stat of the node will be copied to this parameter if
     *                not null.
     * @return the ACL array of the given node.
     * @throws InterruptedException If the server transaction is interrupted.
     * @throws KeeperException If the server signals an error with a non-zero error code.
     * @throws IllegalArgumentException if an invalid path is specified
     */
public List<ACL> getACL(final String path, Stat stat) throws KeeperException, InterruptedException {
    final String clientPath = path;
    PathUtils.validatePath(clientPath);
    final String serverPath = prependChroot(clientPath);
    RequestHeader h = new RequestHeader();
    h.setType(ZooDefs.OpCode.getACL);
    GetACLRequest request = new GetACLRequest();
    request.setPath(serverPath);
    GetACLResponse response = new GetACLResponse();
    ReplyHeader r = cnxn.submitRequest(h, request, response, null);
    if (r.getErr() != 0) {
        throw KeeperException.create(KeeperException.Code.get(r.getErr()), clientPath);
    }
    if (stat != null) {
        DataTree.copyStat(response.getStat(), stat);
    }
    return response.getAcl();
}

Example 8 with RequestHeader

use of org.apache.zookeeper.proto.RequestHeader in project zookeeper by apache.

the class ZooKeeper method getChildren.

/**
     * Return the list of the children of the node of the given path.
     * <p>
     * If the watch is non-null and the call is successful (no exception is thrown),
     * a watch will be left on the node with the given path. The watch willbe
     * triggered by a successful operation that deletes the node of the given
     * path or creates/delete a child under the node.
     * <p>
     * The list of children returned is not sorted and no guarantee is provided
     * as to its natural or lexical order.
     * <p>
     * A KeeperException with error code KeeperException.NoNode will be thrown
     * if no node with the given path exists.
     *
     * @param path
     * @param watcher explicit watcher
     * @return an unordered array of children of the node with the given path
     * @throws InterruptedException If the server transaction is interrupted.
     * @throws KeeperException If the server signals an error with a non-zero error code.
     * @throws IllegalArgumentException if an invalid path is specified
     */
public List<String> getChildren(final String path, Watcher watcher) throws KeeperException, InterruptedException {
    final String clientPath = path;
    PathUtils.validatePath(clientPath);
    // the watch contains the un-chroot path
    WatchRegistration wcb = null;
    if (watcher != null) {
        wcb = new ChildWatchRegistration(watcher, clientPath);
    }
    final String serverPath = prependChroot(clientPath);
    RequestHeader h = new RequestHeader();
    h.setType(ZooDefs.OpCode.getChildren);
    GetChildrenRequest request = new GetChildrenRequest();
    request.setPath(serverPath);
    request.setWatch(watcher != null);
    GetChildrenResponse response = new GetChildrenResponse();
    ReplyHeader r = cnxn.submitRequest(h, request, response, wcb);
    if (r.getErr() != 0) {
        throw KeeperException.create(KeeperException.Code.get(r.getErr()), clientPath);
    }
    return response.getChildren();
}

Example 9 with RequestHeader

use of org.apache.zookeeper.proto.RequestHeader in project zookeeper by apache.

the class ZooKeeper method getData.

/**
     * Return the data and the stat of the node of the given path.
     * <p>
     * If the watch is non-null and the call is successful (no exception is
     * thrown), a watch will be left on the node with the given path. The watch
     * will be triggered by a successful operation that sets data on the node, or
     * deletes the node.
     * <p>
     * A KeeperException with error code KeeperException.NoNode will be thrown
     * if no node with the given path exists.
     *
     * @param path the given path
     * @param watcher explicit watcher
     * @param stat the stat of the node
     * @return the data of the node
     * @throws KeeperException If the server signals an error with a non-zero error code
     * @throws InterruptedException If the server transaction is interrupted.
     * @throws IllegalArgumentException if an invalid path is specified
     */
public byte[] getData(final String path, Watcher watcher, Stat stat) throws KeeperException, InterruptedException {
    final String clientPath = path;
    PathUtils.validatePath(clientPath);
    // the watch contains the un-chroot path
    WatchRegistration wcb = null;
    if (watcher != null) {
        wcb = new DataWatchRegistration(watcher, clientPath);
    }
    final String serverPath = prependChroot(clientPath);
    RequestHeader h = new RequestHeader();
    h.setType(ZooDefs.OpCode.getData);
    GetDataRequest request = new GetDataRequest();
    request.setPath(serverPath);
    request.setWatch(watcher != null);
    GetDataResponse response = new GetDataResponse();
    ReplyHeader r = cnxn.submitRequest(h, request, response, wcb);
    if (r.getErr() != 0) {
        throw KeeperException.create(KeeperException.Code.get(r.getErr()), clientPath);
    }
    if (stat != null) {
        DataTree.copyStat(response.getStat(), stat);
    }
    return response.getData();
}

Example 10 with RequestHeader

use of org.apache.zookeeper.proto.RequestHeader in project zookeeper by apache.

the class ZooKeeper method getData.

/**
     * The asynchronous version of getData.
     *
     * @see #getData(String, Watcher, Stat)
     */
public void getData(final String path, Watcher watcher, DataCallback cb, Object ctx) {
    final String clientPath = path;
    PathUtils.validatePath(clientPath);
    // the watch contains the un-chroot path
    WatchRegistration wcb = null;
    if (watcher != null) {
        wcb = new DataWatchRegistration(watcher, clientPath);
    }
    final String serverPath = prependChroot(clientPath);
    RequestHeader h = new RequestHeader();
    h.setType(ZooDefs.OpCode.getData);
    GetDataRequest request = new GetDataRequest();
    request.setPath(serverPath);
    request.setWatch(watcher != null);
    GetDataResponse response = new GetDataResponse();
    cnxn.queuePacket(h, new ReplyHeader(), request, response, cb, clientPath, serverPath, ctx, wcb);
}