Hi martin, a call like getchildren(final String path, Watcher watcher, ChildrenCallback cb, Object ctx)
Means that set a watch on this node for any further changes on the server. A client will see the response to getchildren data before the above watch is fired. Hope that helps. Thanks mahadev On 2/10/10 6:59 PM, "Martin Traverso" <mtrave...@gmail.com> wrote: > What are the ordering guarantees for asynchronous callbacks vs watcher > notifications (Java API) when both are used in the same call? E.g., > for getChildren(final String path, Watcher watcher, ChildrenCallback cb, > Object ctx) > > Will the callback always be invoked before the watcher if there is a state > change on the server at about the same time the call is made? > > I *think* that's what's implied by the documentation, but I'm not sure I'm > reading it right: > > "All completions for asynchronous calls and watcher callbacks will be made > in order, one at a time. The caller can do any processing they wish, but no > other callbacks will be processed during that time." ( > http://hadoop.apache.org/zookeeper/docs/r3.2.2/zookeeperProgrammers.html#Java+ > Binding > ) > > Thanks! > > Martin
