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

Example 1 with GetDataResponse

use of org.apache.zookeeper.proto.GetDataResponse 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 2 with GetDataResponse

use of org.apache.zookeeper.proto.GetDataResponse 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);
}

Example 3 with GetDataResponse

use of org.apache.zookeeper.proto.GetDataResponse 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();
}

Example 4 with GetDataResponse

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

the class ZooKeeperAdmin method reconfigure.

/**
 * The Asynchronous version of reconfig.
 *
 * @see #reconfigure
 */
public void reconfigure(String joiningServers, String leavingServers, String newMembers, long fromConfig, DataCallback cb, Object ctx) {
    RequestHeader h = new RequestHeader();
    h.setType(ZooDefs.OpCode.reconfig);
    ReconfigRequest request = new ReconfigRequest(joiningServers, leavingServers, newMembers, fromConfig);
    GetDataResponse response = new GetDataResponse();
    cnxn.queuePacket(h, new ReplyHeader(), request, response, cb, ZooDefs.CONFIG_NODE, ZooDefs.CONFIG_NODE, ctx, null);
}

Example 5 with GetDataResponse

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

the class MultiResponse method deserialize.

@Override
public void deserialize(InputArchive archive, String tag) throws IOException {
    results = new ArrayList<OpResult>();
    archive.startRecord(tag);
    MultiHeader h = new MultiHeader();
    h.deserialize(archive, tag);
    while (!h.getDone()) {
        switch(h.getType()) {
            case ZooDefs.OpCode.create:
                CreateResponse cr = new CreateResponse();
                cr.deserialize(archive, tag);
                results.add(new OpResult.CreateResult(cr.getPath()));
                break;
            case ZooDefs.OpCode.create2:
                Create2Response cr2 = new Create2Response();
                cr2.deserialize(archive, tag);
                results.add(new OpResult.CreateResult(cr2.getPath(), cr2.getStat()));
                break;
            case ZooDefs.OpCode.delete:
                results.add(new OpResult.DeleteResult());
                break;
            case ZooDefs.OpCode.setData:
                SetDataResponse sdr = new SetDataResponse();
                sdr.deserialize(archive, tag);
                results.add(new OpResult.SetDataResult(sdr.getStat()));
                break;
            case ZooDefs.OpCode.check:
                results.add(new OpResult.CheckResult());
                break;
            case ZooDefs.OpCode.getChildren:
                GetChildrenResponse gcr = new GetChildrenResponse();
                gcr.deserialize(archive, tag);
                results.add(new OpResult.GetChildrenResult(gcr.getChildren()));
                break;
            case ZooDefs.OpCode.getData:
                GetDataResponse gdr = new GetDataResponse();
                gdr.deserialize(archive, tag);
                results.add(new OpResult.GetDataResult(gdr.getData(), gdr.getStat()));
                break;
            case ZooDefs.OpCode.error:
                // TODO: need way to more cleanly serialize/deserialize exceptions
                ErrorResponse er = new ErrorResponse();
                er.deserialize(archive, tag);
                results.add(new OpResult.ErrorResult(er.getErr()));
                break;
            default:
                throw new IOException("Invalid type " + h.getType() + " in MultiResponse");
        }
        h.deserialize(archive, tag);
    }
    archive.endRecord(tag);
}