import org.apache.zookeeper.proto.GetChildren2Request; //导入依赖的package包/类
/**
 * 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);
}
 

import org.apache.zookeeper.proto.GetChildren2Request; //导入依赖的package包/类
/**
 * The Asynchronous version of getChildren. The request doesn't actually
 * until the asynchronous callback is called.
 *
 * @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);
}
 

import org.apache.zookeeper.proto.GetChildren2Request; //导入依赖的package包/类
private EventType checkType(Record response) {

        if (response == null) {
            return EventType.other;
        } else if (response instanceof ConnectRequest) {
            return EventType.write;
        } else if (response instanceof CreateRequest) {
            return EventType.write;
        } else if (response instanceof DeleteRequest) {
            return EventType.write;
        } else if (response instanceof SetDataRequest) {
            return EventType.write;
        } else if (response instanceof SetACLRequest) {
            return EventType.write;
        } else if (response instanceof SetMaxChildrenRequest) {
            return EventType.write;
        } else if (response instanceof SetSASLRequest) {
            return EventType.write;
        } else if (response instanceof SetWatches) {
            return EventType.write;
        } else if (response instanceof SyncRequest) {
            return EventType.write;
        } else if (response instanceof ExistsRequest) {
            return EventType.read;
        } else if (response instanceof GetDataRequest) {
            return EventType.read;
        } else if (response instanceof GetMaxChildrenRequest) {
            return EventType.read;
        } else if (response instanceof GetACLRequest) {
            return EventType.read;
        } else if (response instanceof GetChildrenRequest) {
            return EventType.read;
        } else if (response instanceof GetChildren2Request) {
            return EventType.read;
        } else if (response instanceof GetSASLRequest) {
            return EventType.read;
        } else {
            return EventType.other;
        }
    }
 

import org.apache.zookeeper.proto.GetChildren2Request; //导入依赖的package包/类
public IGetChildren2Request() {
    this(new GetChildren2Request());
}