本文整理汇总了Java中org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.sync方法的典型用法代码示例。如果您正苦于以下问题：Java ZooKeeperWatcher.sync方法的具体用法？Java ZooKeeperWatcher.sync怎么用？Java ZooKeeperWatcher.sync使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher的用法示例。
在下文中一共展示了ZooKeeperWatcher.sync方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: disable
import org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher; //导入方法依赖的package包/类
/**
* Disable all archiving of files for a given table
* <p>
* Inherently an <b>asynchronous operation</b>.
* @param zooKeeper watcher for the ZK cluster
* @param table name of the table to disable
* @throws KeeperException if an unexpected ZK connection issues occurs
*/
private void disable(ZooKeeperWatcher zooKeeper, byte[] table) throws KeeperException {
// ensure the latest state of the archive node is found
zooKeeper.sync(archiveZnode);
// if the top-level archive node is gone, then we are done
if (ZKUtil.checkExists(zooKeeper, archiveZnode) < 0) {
return;
}
// delete the table node, from the archive
String tableNode = this.getTableNode(table);
// make sure the table is the latest version so the delete takes
zooKeeper.sync(tableNode);
LOG.debug("Attempting to delete table node:" + tableNode);
ZKUtil.deleteNodeRecursively(zooKeeper, tableNode);
}
示例2: verifyRegionState
import org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher; //导入方法依赖的package包/类
/**
* Verifies that the specified region is in the specified state in ZooKeeper.
* <p>
* Returns true if region is in transition and in the specified state in
* ZooKeeper. Returns false if the region does not exist in ZK or is in
* a different state.
* <p>
* Method synchronizes() with ZK so will yield an up-to-date result but is
* a slow read.
* @param zkw
* @param region
* @param expectedState
* @return true if region exists and is in expected state
* @throws DeserializationException
*/
static boolean verifyRegionState(ZooKeeperWatcher zkw, HRegionInfo region, EventType expectedState)
throws KeeperException, DeserializationException {
String encoded = region.getEncodedName();
String node = ZKAssign.getNodeName(zkw, encoded);
zkw.sync(node);
// Read existing data of the node
byte [] existingBytes = null;
try {
existingBytes = ZKUtil.getDataAndWatch(zkw, node);
} catch (KeeperException.NoNodeException nne) {
return false;
} catch (KeeperException e) {
throw e;
}
if (existingBytes == null) return false;
RegionTransition rt = RegionTransition.parseFrom(existingBytes);
return rt.getEventType().equals(expectedState);
}