Path Cache Recipe and traversing child nodes

["Lavoie, John L" <jo...@optum.com>]

Hi,

I'm brand new to Zookeeper and am trying Curator to help get a jump start.  I'm looking through the curator recipes and the Path Cache seems like a really good fit for me.

I want to post the state of my currently executing Cascading jobs to zookeeper so that we can centrally query them from a different system.  The znode hierarchy might look something like this:

/my/app/
-/otherdata/
-/jobstatus/
--/activejob1
--/activejob2

I've set up a PathChildrenCache instance to monitor /my/app/ and I'm not seeing any updates when I write values to the jobstatus node.  I need to change my reading app to monitor /my/app/jobstatus.  It looks like the PathChildrenCache and the Path Cache recipe are not capable of iterating over children within the main node that it is monitoring.  Is that true? Is there a way around this without having to monitor multiple nodes for updates or is that an inherent design to Curator/ZK?

I don't even see an easy way to traverse the child nodes through the PathCache Example if I try to change the list() method to recursively walk the tree.  I must be missing something in the API here, right?

John Lavoie

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Re: Path Cache Recipe and traversing child nodes

[Jordan Zimmerman <jo...@jordanzimmerman.com>]

PathChildrenCache is not recursive currently. Track CURATOR-33

From: Lavoie, John L Lavoie, John L
Reply: user@curator.apache.org user@curator.apache.org
Date: February 3, 2014 at 4:04:48 PM
To: user@curator.apache.org user@curator.apache.org
Subject:  Path Cache Recipe and traversing child nodes  
Hi,

 

I’m brand new to Zookeeper and am trying Curator to help get a jump start.  I’m looking through the curator recipes and the Path Cache seems like a really good fit for me.


I want to post the state of my currently executing Cascading jobs to zookeeper so that we can centrally query them from a different system.  The znode hierarchy might look something like this:

 

/my/app/

-/otherdata/

-/jobstatus/

--/activejob1

--/activejob2

 

I’ve set up a PathChildrenCache instance to monitor /my/app/ and I’m not seeing any updates when I write values to the jobstatus node.  I need to change my reading app to monitor /my/app/jobstatus.  It looks like the PathChildrenCache and the Path Cache recipe are not capable of iterating over children within the main node that it is monitoring.  Is that true? Is there a way around this without having to monitor multiple nodes for updates or is that an inherent design to Curator/ZK?

 

I don’t even see an easy way to traverse the child nodes through the PathCache Example if I try to change the list() method to recursively walk the tree.  I must be missing something in the API here, right?

 

John Lavoie


This e-mail, including attachments, may include confidential and/or
proprietary information, and may be used only by the person or entity
to which it is addressed. If the reader of this e-mail is not the intended
recipient or his or her authorized agent, the reader is hereby notified
that any dissemination, distribution or copying of this e-mail is
prohibited. If you have received this e-mail in error, please notify the
sender by replying to this message and delete this e-mail immediately.