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

Example 31 with ReplyHeader

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

the class ZooKeeper method setData.

/**
 * Set the data for the node of the given path if such a node exists and the
 * given version matches the version of the node (if the given version is
 * -1, it matches any node's versions). Return the stat of the node.
 * <p>
 * This operation, if successful, will trigger all the watches on the node
 * of the given path left by getData calls.
 * <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.
 * <p>
 * The maximum allowable size of the data array is 1 MB (1,048,576 bytes).
 * Arrays larger than this will cause a KeeperException to be thrown.
 *
 * @param path
 *                the path of the node
 * @param data
 *                the data to set
 * @param version
 *                the expected matching version
 * @return the state 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 IllegalArgumentException if an invalid path is specified
 */
public Stat setData(final String path, byte[] data, 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.setData);
    SetDataRequest request = new SetDataRequest();
    request.setPath(serverPath);
    request.setData(data);
    request.setVersion(version);
    SetDataResponse response = new SetDataResponse();
    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 32 with ReplyHeader

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

the class ZooKeeper method exists.

/**
 * Return the stat of the node of the given path. Return null if no such a
 * node exists.
 * <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 creates/delete the node or sets
 * the data on the node.
 *
 * @param path the node path
 * @param watcher explicit watcher
 * @return the stat of the node of the given path; return null if no such a
 *         node exists.
 * @throws KeeperException If the server signals an error
 * @throws InterruptedException If the server transaction is interrupted.
 * @throws IllegalArgumentException if an invalid path is specified
 */
public Stat exists(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 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();
    ReplyHeader r = cnxn.submitRequest(h, request, response, wcb);
    if (r.getErr() != 0) {
        if (r.getErr() == KeeperException.Code.NONODE.intValue()) {
            return null;
        }
        throw KeeperException.create(KeeperException.Code.get(r.getErr()), clientPath);
    }
    return response.getStat().getCzxid() == -1 ? null : response.getStat();
}

Example 33 with ReplyHeader

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

the class ZooKeeper method getChildren.

/**
 * The asynchronous version of getChildren.
 *
 * @see #getChildren(String, Watcher)
 */
public void getChildren(final String path, Watcher watcher, ChildrenCallback 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.getChildren);
    GetChildrenRequest request = new GetChildrenRequest();
    request.setPath(serverPath);
    request.setWatch(watcher != null);
    GetChildrenResponse response = new GetChildrenResponse();
    cnxn.queuePacket(h, new ReplyHeader(), request, response, cb, clientPath, serverPath, ctx, wcb);
}

Example 34 with ReplyHeader

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

the class ZooKeeper method create.

/**
 * The asynchronous version of create.
 *
 * @see #create(String, byte[], List, CreateMode)
 */
public void create(final String path, byte[] data, List<ACL> acl, CreateMode createMode, StringCallback cb, Object ctx) {
    final String clientPath = path;
    PathUtils.validatePath(clientPath, createMode.isSequential());
    EphemeralType.validateTTL(createMode, -1);
    final String serverPath = prependChroot(clientPath);
    RequestHeader h = new RequestHeader();
    h.setType(createMode.isContainer() ? ZooDefs.OpCode.createContainer : ZooDefs.OpCode.create);
    CreateRequest request = new CreateRequest();
    CreateResponse response = new CreateResponse();
    ReplyHeader r = new ReplyHeader();
    request.setData(data);
    request.setFlags(createMode.toFlag());
    request.setPath(serverPath);
    request.setAcl(acl);
    cnxn.queuePacket(h, r, request, response, cb, clientPath, serverPath, ctx, null);
}

Example 35 with ReplyHeader

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

the class ZooKeeper method setACL.

/**
 * The asynchronous version of setACL.
 *
 * @see #setACL(String, List, int)
 */
public void setACL(final String path, List<ACL> acl, int version, StatCallback cb, Object ctx) {
    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);
    request.setAcl(acl);
    request.setVersion(version);
    SetACLResponse response = new SetACLResponse();
    cnxn.queuePacket(h, new ReplyHeader(), request, response, cb, clientPath, serverPath, ctx, null);
}