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

Example 11 with ReplyHeader

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

the class ZooKeeper method exists.

/**
     * The asynchronous version of exists.
     *
     * @see #exists(String, Watcher)
     */
public void exists(final String path, Watcher watcher, StatCallback 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 ExistsWatchRegistration(watcher, clientPath);
    }
    final String serverPath = prependChroot(clientPath);
    RequestHeader h = new RequestHeader();
    h.setType(ZooDefs.OpCode.exists);
    ExistsRequest request = new ExistsRequest();
    request.setPath(serverPath);
    request.setWatch(watcher != null);
    SetDataResponse response = new SetDataResponse();
    cnxn.queuePacket(h, new ReplyHeader(), request, response, cb, clientPath, serverPath, ctx, wcb);
}

Example 12 with ReplyHeader

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

the class ZooKeeper method setACL.

/**
     * Set the ACL for the node of the given path if such a node exists and the
     * given version matches the version of the node. Return the stat of the
     * node.
     * <p>
     * A KeeperException with error code KeeperException.NoNode will be thrown
     * if no node with the given path exists.
     * <p>
     * A KeeperException with error code KeeperException.BadVersion will be
     * thrown if the given version does not match the node's version.
     *
     * @param path
     * @param acl
     * @param version
     * @return the stat of the node.
     * @throws InterruptedException If the server transaction is interrupted.
     * @throws KeeperException If the server signals an error with a non-zero error code.
     * @throws org.apache.zookeeper.KeeperException.InvalidACLException If the acl is invalide.
     * @throws IllegalArgumentException if an invalid path is specified
     */
public Stat setACL(final String path, List<ACL> acl, int version) throws KeeperException, InterruptedException {
    final String clientPath = path;
    PathUtils.validatePath(clientPath);
    final String serverPath = prependChroot(clientPath);
    RequestHeader h = new RequestHeader();
    h.setType(ZooDefs.OpCode.setACL);
    SetACLRequest request = new SetACLRequest();
    request.setPath(serverPath);
    if (acl != null && acl.size() == 0) {
        throw new KeeperException.InvalidACLException(clientPath);
    }
    request.setAcl(acl);
    request.setVersion(version);
    SetACLResponse response = new SetACLResponse();
    ReplyHeader r = cnxn.submitRequest(h, request, response, null);
    if (r.getErr() != 0) {
        throw KeeperException.create(KeeperException.Code.get(r.getErr()), clientPath);
    }
    return response.getStat();
}

Example 13 with ReplyHeader

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

the class ZooKeeper method getChildren.

/**
     * The asynchronous version of getChildren.
     *
     * @since 3.3.0
     * 
     * @see #getChildren(String, Watcher, Stat)
     */
public void getChildren(final String path, Watcher watcher, Children2Callback 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 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();
    cnxn.queuePacket(h, new ReplyHeader(), request, response, cb, clientPath, serverPath, ctx, wcb);
}

Example 14 with ReplyHeader

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

the class ZooKeeper method delete.

/**
     * Delete the node with the given path. The call will succeed if such a node
     * exists, and the given version matches the node's version (if the given
     * version is -1, it matches any node's versions).
     * <p>
     * A KeeperException with error code KeeperException.NoNode will be thrown
     * if the nodes does not exist.
     * <p>
     * A KeeperException with error code KeeperException.BadVersion will be
     * thrown if the given version does not match the node's version.
     * <p>
     * A KeeperException with error code KeeperException.NotEmpty will be thrown
     * if the node has children.
     * <p>
     * This operation, if successful, will trigger all the watches on the node
     * of the given path left by exists API calls, and the watches on the parent
     * node left by getChildren API calls.
     *
     * @param path
     *                the path of the node to be deleted.
     * @param version
     *                the expected node version.
     * @throws InterruptedException IF the server transaction is interrupted
     * @throws KeeperException If the server signals an error with a non-zero
     *   return code.
     * @throws IllegalArgumentException if an invalid path is specified
     */
public void delete(final String path, int version) throws InterruptedException, KeeperException {
    final String clientPath = path;
    PathUtils.validatePath(clientPath);
    final String serverPath;
    // I think this makes sense even in chroot case.
    if (clientPath.equals("/")) {
        // a bit of a hack, but delete(/) will never succeed and ensures
        // that the same semantics are maintained
        serverPath = clientPath;
    } else {
        serverPath = prependChroot(clientPath);
    }
    RequestHeader h = new RequestHeader();
    h.setType(ZooDefs.OpCode.delete);
    DeleteRequest request = new DeleteRequest();
    request.setPath(serverPath);
    request.setVersion(version);
    ReplyHeader r = cnxn.submitRequest(h, request, null, null);
    if (r.getErr() != 0) {
        throw KeeperException.create(KeeperException.Code.get(r.getErr()), clientPath);
    }
}

Example 15 with ReplyHeader

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

the class ZooKeeper method getConfig.

/**
     * Return the last committed configuration (as known to the server to which the client is connected)
     * and the stat of the configuration.
     * <p>
     * If the watch is non-null and the call is successful (no exception is
     * thrown), a watch will be left on the configuration node (ZooDefs.CONFIG_NODE). The watch
     * will be triggered by a successful reconfig operation
     * <p>
     * A KeeperException with error code KeeperException.NoNode will be thrown
     * if the configuration node doesn't exists.
     *
     * @param watcher explicit watcher
     * @param stat the stat of the configuration node ZooDefs.CONFIG_NODE
     * @return configuration data stored in ZooDefs.CONFIG_NODE
     * @throws KeeperException If the server signals an error with a non-zero error code
     * @throws InterruptedException If the server transaction is interrupted.
     */
public byte[] getConfig(Watcher watcher, Stat stat) throws KeeperException, InterruptedException {
    final String configZnode = ZooDefs.CONFIG_NODE;
    // the watch contains the un-chroot path
    WatchRegistration wcb = null;
    if (watcher != null) {
        wcb = new DataWatchRegistration(watcher, configZnode);
    }
    RequestHeader h = new RequestHeader();
    h.setType(ZooDefs.OpCode.getData);
    GetDataRequest request = new GetDataRequest();
    request.setPath(configZnode);
    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()), configZnode);
    }
    if (stat != null) {
        DataTree.copyStat(response.getStat(), stat);
    }
    return response.getData();
}