Thanks Dave & Ben. So, ultimately I need to synchronize process() method, when the same Watcher object is registered with different zookeeper handles (or Znodes). :)
On Mon, Jul 19, 2010 at 3:03 PM, Benjamin Reed <br...@yahoo-inc.com> wrote: > yes, you (and dave) are correct. watches are invoked sequentially in order. > the only time you can run into trouble is if you register the same watcher > object with different zookeeper handles since there is a dispatch thread per > zookeeper handle. > > ben > > > On 07/19/2010 02:50 PM, Srikanth Bondalapati: wrote: > >> Does this mean that, when I am processing one event, then the zookeeper >> won't be firing another event. It does so only when the first event is >> completely processed& returned by the callback object. Am I correct in my >> interpretation?? >> >> Thanks& Regards, >> Srikanth. >> >> On Mon, Jul 19, 2010 at 2:40 PM, Dave Wright<wrig...@gmail.com> wrote: >> >> >> >>> There is a single thread used to fire notification callbacks, your >>> callbacks will be called in order one at a time and you only need to >>> worry about synchronizing state with the rest of your code. >>> >>> -Dave Wright >>> >>> On Mon, Jul 19, 2010 at 5:37 PM, Srikanth Bondalapati: >>> <sbondalap...@tagged.com> wrote: >>> >>> >>>> Hi, >>>> >>>> I have a class (X) that implements the Watcher Interface. Consider, an >>>> instance of 'X' is registered as a callback object for different Znode >>>> changes. Now, If there are several simultaneous changes that happen on >>>> >>>> >>> these >>> >>> >>>> registered znodes, then will these events be fired by the zookeeper to >>>> callback object sequentially or should I have to synchronize the >>>> >>>> >>> process() >>> >>> >>>> method of Watcher interface in order to handle these events >>>> sequentially? >>>> Suppose, I have synchronized the process method(), then will the events >>>> fired by zookeeper be missed by the callback object when some other >>>> event >>>> >>>> >>> is >>> >>> >>>> being processed? Or, does the zookeeper ensures that all the events are >>>> finally reached and handled by the callback object? >>>> >>>> Thanks& Regards, >>>> Srikanth. >>>> >>>> >>>> >>> >>> >> >
