Java Stat.getEphemeralOwner方法代碼示例

import org.apache.zookeeper.data.Stat; //導入方法依賴的package包/類
/**
 * Expire the ZK session of the given service. This requires
 * (and asserts) that the given service be the current active.
 * @throws NoNodeException if no service holds the lock
 */
public void expireActiveLockHolder(int idx)
    throws NoNodeException {
  Stat stat = new Stat();
  byte[] data = zks.getZKDatabase().getData(
      DummyZKFC.LOCK_ZNODE, stat, null);
  
  assertArrayEquals(Ints.toByteArray(svcs.get(idx).index), data);
  long session = stat.getEphemeralOwner();
  LOG.info("Expiring svc " + idx + "'s zookeeper session " + session);
  zks.closeSession(session);
}
 

import org.apache.zookeeper.data.Stat; //導入方法依賴的package包/類
public boolean isAllowsChildren(String nodePath) {
    if (connected) {
        try {
            Stat s = zooKeeper.exists(nodePath, false);
            if (s != null) {
                return s.getEphemeralOwner() == 0;
            }
        } catch (Exception e) {
            LoggerFactory.getLogger().error(
                    "Error occurred determining whether node is allowed children: "
                            + nodePath, e);
        }
    }
    return false;
}
 

import org.apache.zookeeper.data.Stat; //導入方法依賴的package包/類
@PUT
@Produces( { MediaType.APPLICATION_JSON, "application/javascript",
        MediaType.APPLICATION_XML })
@Consumes(MediaType.APPLICATION_OCTET_STREAM)
public Response setZNode(
        @PathParam("path") String path,
        @QueryParam("callback") String callback,
        @DefaultValue("-1") @QueryParam("version") String versionParam,
        @DefaultValue("base64") @QueryParam("dataformat") String dataformat,
        @DefaultValue("false") @QueryParam("null") String setNull,
        @Context UriInfo ui, byte[] data) throws InterruptedException,
        KeeperException {
    ensurePathNotNull(path);

    int version;
    try {
        version = Integer.parseInt(versionParam);
    } catch (NumberFormatException e) {
        throw new WebApplicationException(Response.status(
                Response.Status.BAD_REQUEST).entity(
                new ZError(ui.getRequestUri().toString(), path
                        + " bad version " + versionParam)).build());
    }

    if (setNull.equals("true")) {
        data = null;
    }

    Stat stat = zk.setData(path, data, version);

    ZStat zstat = new ZStat(path, ui.getAbsolutePath().toString(), null,
            null, stat.getCzxid(), stat.getMzxid(), stat.getCtime(), stat
                    .getMtime(), stat.getVersion(), stat.getCversion(),
            stat.getAversion(), stat.getEphemeralOwner(), stat
                    .getDataLength(), stat.getNumChildren(), stat
                    .getPzxid());

    return Response.status(Response.Status.OK).entity(
            new JSONWithPadding(zstat, callback)).build();
}
 

import org.apache.zookeeper.data.Stat; //導入方法依賴的package包/類
/**
 * Expire the ZK session of the given service. This requires
 * (and asserts) that the given service be the current active.
 * @throws NoNodeException if no service holds the lock
 */
public void expireActiveLockHolder(int idx)
    throws NoNodeException {
  Stat stat = new Stat();
  byte[] data = zks.getZKDatabase().getData(
      DummyZKFC.LOCK_ZNODE, stat, null);
  
  assertArrayEquals(Ints.toByteArray(svcs[idx].index), data);
  long session = stat.getEphemeralOwner();
  LOG.info("Expiring svc " + idx + "'s zookeeper session " + session);
  zks.closeSession(session);
}
 

import org.apache.zookeeper.data.Stat; //導入方法依賴的package包/類
/**
 * Recursively expand the path into the supplied string builder, increasing
 * the indentation by {@link #INDENT} as it proceeds (depth first) down
 * the tree
 * @param builder string build to append to
 * @param path path to examine
 * @param indent current indentation
 */
private void expand(StringBuilder builder,
    String path,
    int indent) {
  try {
    GetChildrenBuilder childrenBuilder = curator.getChildren();
    List<String> children = childrenBuilder.forPath(path);
    for (String child : children) {
      String childPath = path + "/" + child;
      String body;
      Stat stat = curator.checkExists().forPath(childPath);
      StringBuilder bodyBuilder = new StringBuilder(256);
      bodyBuilder.append("  [")
                        .append(stat.getDataLength())
                        .append("]");
      if (stat.getEphemeralOwner() > 0) {
        bodyBuilder.append("*");
      }
      if (verbose) {
        // verbose: extract ACLs
        builder.append(" -- ");
        List<ACL> acls =
            curator.getACL().forPath(childPath);
        for (ACL acl : acls) {
          builder.append(RegistrySecurity.aclToString(acl));
          builder.append(" ");
        }
      }
      body = bodyBuilder.toString();
      // print each child
      append(builder, indent, ' ');
      builder.append('/').append(child);
      builder.append(body);
      builder.append('\n');
      // recurse
      expand(builder, childPath, indent + INDENT);
    }
  } catch (Exception e) {
    builder.append(e.toString()).append("\n");
  }
}