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

Example 1 with RequestHeader

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

the class ZooKeeper method removeWatches.

private void removeWatches(int opCode, String path, Watcher watcher, WatcherType watcherType, boolean local) throws InterruptedException, KeeperException {
    PathUtils.validatePath(path);
    final String clientPath = path;
    final String serverPath = prependChroot(clientPath);
    WatchDeregistration wcb = new WatchDeregistration(clientPath, watcher, watcherType, local, watchManager);
    RequestHeader h = new RequestHeader();
    h.setType(opCode);
    Record request = getRemoveWatchesRequest(opCode, watcherType, serverPath);
    ReplyHeader r = cnxn.submitRequest(h, request, null, null, wcb);
    if (r.getErr() != 0) {
        throw KeeperException.create(KeeperException.Code.get(r.getErr()), clientPath);
    }
}

Example 2 with RequestHeader

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

the class ClientCnxn method sendPacket.

public void sendPacket(Record request, Record response, AsyncCallback cb, int opCode) throws IOException {
    // Generate Xid now because it will be sent immediately,
    // by call to sendThread.sendPacket() below.
    int xid = getXid();
    RequestHeader h = new RequestHeader();
    h.setXid(xid);
    h.setType(opCode);
    ReplyHeader r = new ReplyHeader();
    r.setXid(xid);
    Packet p = new Packet(h, r, request, response, null, false);
    p.cb = cb;
    sendThread.sendPacket(p);
}

Example 3 with RequestHeader

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

the class ZooKeeper method create.

/**
     * Create a node with the given path. The node data will be the given data,
     * and node acl will be the given acl.
     * <p>
     * The flags argument specifies whether the created node will be ephemeral
     * or not.
     * <p>
     * An ephemeral node will be removed by the ZooKeeper automatically when the
     * session associated with the creation of the node expires.
     * <p>
     * The flags argument can also specify to create a sequential node. The
     * actual path name of a sequential node will be the given path plus a
     * suffix "i" where i is the current sequential number of the node. The sequence
     * number is always fixed length of 10 digits, 0 padded. Once
     * such a node is created, the sequential number will be incremented by one.
     * <p>
     * If a node with the same actual path already exists in the ZooKeeper, a
     * KeeperException with error code KeeperException.NodeExists will be
     * thrown. Note that since a different actual path is used for each
     * invocation of creating sequential node with the same path argument, the
     * call will never throw "file exists" KeeperException.
     * <p>
     * If the parent node does not exist in the ZooKeeper, a KeeperException
     * with error code KeeperException.NoNode will be thrown.
     * <p>
     * An ephemeral node cannot have children. If the parent node of the given
     * path is ephemeral, a KeeperException with error code
     * KeeperException.NoChildrenForEphemerals will be thrown.
     * <p>
     * This operation, if successful, will trigger all the watches left on the
     * node of the given path by exists and getData API calls, and the watches
     * left on the parent node by getChildren API calls.
     * <p>
     * If a node is created successfully, the ZooKeeper server will trigger the
     * watches on the path left by exists calls, and the watches on the parent
     * of the node by getChildren calls.
     * <p>
     * The maximum allowable size of the data array is 1 MB (1,048,576 bytes).
     * Arrays larger than this will cause a KeeperExecption to be thrown.
     *
     * @param path
     *                the path for the node
     * @param data
     *                the initial data for the node
     * @param acl
     *                the acl for the node
     * @param createMode
     *                specifying whether the node to be created is ephemeral
     *                and/or sequential
     * @return the actual path of the created node
     * @throws KeeperException if the server returns a non-zero error code
     * @throws KeeperException.InvalidACLException if the ACL is invalid, null, or empty
     * @throws InterruptedException if the transaction is interrupted
     * @throws IllegalArgumentException if an invalid path is specified
     */
public String create(final String path, byte[] data, List<ACL> acl, CreateMode createMode) throws KeeperException, InterruptedException {
    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();
    request.setData(data);
    request.setFlags(createMode.toFlag());
    request.setPath(serverPath);
    if (acl != null && acl.size() == 0) {
        throw new KeeperException.InvalidACLException();
    }
    request.setAcl(acl);
    ReplyHeader r = cnxn.submitRequest(h, request, response, null);
    if (r.getErr() != 0) {
        throw KeeperException.create(KeeperException.Code.get(r.getErr()), clientPath);
    }
    if (cnxn.chrootPath == null) {
        return response.getPath();
    } else {
        return response.getPath().substring(cnxn.chrootPath.length());
    }
}

Example 4 with RequestHeader

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

the class ZooKeeper method multiInternal.

protected List<OpResult> multiInternal(MultiTransactionRecord request) throws InterruptedException, KeeperException {
    RequestHeader h = new RequestHeader();
    h.setType(ZooDefs.OpCode.multi);
    MultiResponse response = new MultiResponse();
    ReplyHeader r = cnxn.submitRequest(h, request, response, null);
    if (r.getErr() != 0) {
        throw KeeperException.create(KeeperException.Code.get(r.getErr()));
    }
    List<OpResult> results = response.getResultList();
    ErrorResult fatalError = null;
    for (OpResult result : results) {
        if (result instanceof ErrorResult && ((ErrorResult) result).getErr() != KeeperException.Code.OK.intValue()) {
            fatalError = (ErrorResult) result;
            break;
        }
    }
    if (fatalError != null) {
        KeeperException ex = KeeperException.create(KeeperException.Code.get(fatalError.getErr()));
        ex.setMultiResults(results);
        throw ex;
    }
    return results;
}

Example 5 with RequestHeader

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

the class ZooKeeper method create.

/**
     * The asynchronous version of create with ttl.
     *
     * @see #create(String, byte[], List, CreateMode, Stat, long)
     */
public void create(final String path, byte[] data, List<ACL> acl, CreateMode createMode, Create2Callback cb, Object ctx, long ttl) {
    final String clientPath = path;
    PathUtils.validatePath(clientPath, createMode.isSequential());
    EphemeralType.validateTTL(createMode, ttl);
    final String serverPath = prependChroot(clientPath);
    RequestHeader h = new RequestHeader();
    setCreateHeader(createMode, h);
    ReplyHeader r = new ReplyHeader();
    Create2Response response = new Create2Response();
    Record record = makeCreateRecord(createMode, serverPath, data, acl, ttl);
    cnxn.queuePacket(h, r, record, response, cb, clientPath, serverPath, ctx, null);
}