Example usage for org.apache.zookeeper CreateMode toFlag

Introduction

In this page you can find the example usage for org.apache.zookeeper CreateMode toFlag.

Prototype

public int toFlag() 

Source Link

Usage

From source file:org.lab.mars.onem2m.ZooKeeper.java

License:Apache License

/**
 * Create a node with the given path. The node data will be the given data,
 * and node acl will be the given acl./*from   ww  w  . ja va  2 s .  co m*/
 * <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());

    final String serverPath = prependChroot(clientPath);

    RequestHeader h = new RequestHeader();
    h.setType(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);

    if (cnxn.chrootPath == null) {
        return response.getPath();
    } else {
        return response.getPath().substring(cnxn.chrootPath.length());
    }
}

---

From source file:org.lab.mars.onem2m.ZooKeeper.java

License:Apache License

/**
 * The asynchronous version of create./* www. j a  v a2 s.c om*/
 *
 * @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());

    final String serverPath = prependChroot(clientPath);

    RequestHeader h = new RequestHeader();
    h.setType(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);
}

---