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

Example 31 with RequestHeader

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

the class ZooKeeper method sync.

/**
 * Asynchronous sync. Flushes channel between process and leader.
 * @param path
 * @param cb a handler for the callback
 * @param ctx context to be provided to the callback
 * @throws IllegalArgumentException if an invalid path is specified
 */
public void sync(final String path, VoidCallback cb, Object ctx) {
    final String clientPath = path;
    PathUtils.validatePath(clientPath);
    final String serverPath = prependChroot(clientPath);
    RequestHeader h = new RequestHeader();
    h.setType(ZooDefs.OpCode.sync);
    SyncRequest request = new SyncRequest();
    SyncResponse response = new SyncResponse();
    request.setPath(serverPath);
    cnxn.queuePacket(h, new ReplyHeader(), request, response, cb, clientPath, serverPath, ctx, null);
}

Example 32 with RequestHeader

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

the class ZooKeeper method create.

/**
 * same as {@link #create(String, byte[], List, CreateMode, Stat)} but
 * allows for specifying a TTL when mode is {@link CreateMode#PERSISTENT_WITH_TTL}
 * or {@link CreateMode#PERSISTENT_SEQUENTIAL_WITH_TTL}. If the znode has not been modified
 * within the given TTL, it will be deleted once it has no children. The TTL unit is
 * milliseconds and must be greater than 0 and less than or equal to
 * {@link EphemeralType#MAX_TTL}.
 */
public String create(final String path, byte[] data, List<ACL> acl, CreateMode createMode, Stat stat, long ttl) throws KeeperException, InterruptedException {
    final String clientPath = path;
    PathUtils.validatePath(clientPath, createMode.isSequential());
    EphemeralType.validateTTL(createMode, ttl);
    validateACL(acl);
    final String serverPath = prependChroot(clientPath);
    RequestHeader h = new RequestHeader();
    setCreateHeader(createMode, h);
    Create2Response response = new Create2Response();
    Record record = makeCreateRecord(createMode, serverPath, data, acl, ttl);
    ReplyHeader r = cnxn.submitRequest(h, record, response, null);
    if (r.getErr() != 0) {
        throw KeeperException.create(KeeperException.Code.get(r.getErr()), clientPath);
    }
    if (stat != null) {
        DataTree.copyStat(response.getStat(), stat);
    }
    if (cnxn.chrootPath == null) {
        return response.getPath();
    } else {
        return response.getPath().substring(cnxn.chrootPath.length());
    }
}

Example 33 with RequestHeader

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

the class ZooKeeper method delete.

/**
 * The asynchronous version of delete.
 *
 * @see #delete(String, int)
 */
public void delete(final String path, int version, VoidCallback cb, Object ctx) {
    final String clientPath = path;
    PathUtils.validatePath(clientPath);
    final String serverPath;
    // I think this makes sense even in chroot case.
    if (clientPath.equals("/")) {
        // a bit of a hack, but delete(/) will never succeed and ensures
        // that the same semantics are maintained
        serverPath = clientPath;
    } else {
        serverPath = prependChroot(clientPath);
    }
    RequestHeader h = new RequestHeader();
    h.setType(ZooDefs.OpCode.delete);
    DeleteRequest request = new DeleteRequest();
    request.setPath(serverPath);
    request.setVersion(version);
    cnxn.queuePacket(h, new ReplyHeader(), request, null, cb, clientPath, serverPath, ctx, null);
}

Example 34 with RequestHeader

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

the class ZooKeeper method getACL.

/**
 * The asynchronous version of getACL.
 *
 * @see #getACL(String, Stat)
 */
public void getACL(final String path, Stat stat, ACLCallback cb, Object ctx) {
    final String clientPath = path;
    PathUtils.validatePath(clientPath);
    final String serverPath = prependChroot(clientPath);
    RequestHeader h = new RequestHeader();
    h.setType(ZooDefs.OpCode.getACL);
    GetACLRequest request = new GetACLRequest();
    request.setPath(serverPath);
    GetACLResponse response = new GetACLResponse();
    cnxn.queuePacket(h, new ReplyHeader(), request, response, cb, clientPath, serverPath, ctx, null);
}

Example 35 with RequestHeader

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

the class ZooKeeperAdmin method reconfigure.

/**
 * Reconfigure - add/remove servers. Return the new configuration.
 * @param joiningServers
 *                a comma separated list of servers being added (incremental reconfiguration)
 * @param leavingServers
 *                a comma separated list of servers being removed (incremental reconfiguration)
 * @param newMembers
 *                a comma separated list of new membership (non-incremental reconfiguration)
 * @param fromConfig
 *                version of the current configuration
 *                (optional - causes reconfiguration to throw an exception if configuration is no longer current)
 * @param stat the stat of /zookeeper/config znode will be copied to this
 *             parameter if not null.
 * @return new configuration
 * @throws InterruptedException If the server transaction is interrupted.
 * @throws KeeperException If the server signals an error with a non-zero error code.
 */
public byte[] reconfigure(String joiningServers, String leavingServers, String newMembers, long fromConfig, Stat stat) throws KeeperException, InterruptedException {
    RequestHeader h = new RequestHeader();
    h.setType(ZooDefs.OpCode.reconfig);
    ReconfigRequest request = new ReconfigRequest(joiningServers, leavingServers, newMembers, fromConfig);
    GetDataResponse response = new GetDataResponse();
    ReplyHeader r = cnxn.submitRequest(h, request, response, null);
    if (r.getErr() != 0) {
        throw KeeperException.create(KeeperException.Code.get(r.getErr()), "");
    }
    if (stat != null) {
        DataTree.copyStat(response.getStat(), stat);
    }
    return response.getData();
}