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java.lang.Objectorg.apache.hadoop.hbase.zookeeper.ZooKeeperListener
public class ZooKeeperListener
Base class for internal listeners of ZooKeeper events.
The ZooKeeperWatcher
for a process will execute the appropriate
methods of implementations of this class. In order to receive events from
the watcher, every listener must register itself via ZooKeeperWatcher.registerListener(org.apache.hadoop.hbase.zookeeper.ZooKeeperListener)
.
Subclasses need only override those methods in which they are interested.
Note that the watcher will be blocked when invoking methods in listeners so
they must not be long-running.
Field Summary | |
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protected ZooKeeperWatcher |
watcher
|
Constructor Summary | |
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ZooKeeperListener(ZooKeeperWatcher watcher)
Construct a ZooKeeper event listener. |
Method Summary | |
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void |
nodeChildrenChanged(String path)
Called when an existing node has a child node added or removed. |
void |
nodeCreated(String path)
Called when a new node has been created. |
void |
nodeDataChanged(String path)
Called when an existing node has changed data. |
void |
nodeDeleted(String path)
Called when a node has been deleted |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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protected ZooKeeperWatcher watcher
Constructor Detail |
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public ZooKeeperListener(ZooKeeperWatcher watcher)
Method Detail |
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public void nodeCreated(String path)
path
- full path of the new nodepublic void nodeDeleted(String path)
path
- full path of the deleted nodepublic void nodeDataChanged(String path)
path
- full path of the updated nodepublic void nodeChildrenChanged(String path)
path
- full path of the node whose children have changed
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