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Posted to user@helix.apache.org by Varun Sharma <va...@pinterest.com> on 2015/02/05 01:20:07 UTC

Property store subscription example

Hi,

I am planning to use the property store to work around some issues with
extremely large external views in zk. The work around is to compress
values, write to property store and subscribe to watch those smaller valued
properties.

Is there an example for how to subscribe to the property store ?

Thanks
Varun

RE: Property store subscription example

Posted by Zhen Zhang <zz...@linkedin.com>.

You can call get() to read the value. The value is cached locally in most cases.

________________________________
From: Varun Sharma [varun@pinterest.com]
Sent: Thursday, February 05, 2015 1:21 AM
To: user@helix.apache.org
Subject: Re: Property store subscription example

Thanks, zhen - how do I get the value associated with the path - The listener seems to only provide the path.

On Wed, Feb 4, 2015 at 10:58 PM, Zhen Zhang <zz...@linkedin.com>> wrote:
Hi Varun,

You can refer to this example:
https://github.com/apache/helix/blob/helix-0.6.x/helix-core/src/test/java/org/apache/helix/store/zk/TestZkHelixPropertyStore.java

Thanks,
Jason

________________________________
From: Varun Sharma [varun@pinterest.com<ma...@pinterest.com>]
Sent: Wednesday, February 04, 2015 4:20 PM
To: user@helix.apache.org<ma...@helix.apache.org>
Subject: Property store subscription example

Hi,

I am planning to use the property store to work around some issues with extremely large external views in zk. The work around is to compress values, write to property store and subscribe to watch those smaller valued properties.

Is there an example for how to subscribe to the property store ?

Thanks
Varun

Re: Property store subscription example

Posted by Varun Sharma <va...@pinterest.com>.

Thanks, zhen - how do I get the value associated with the path - The
listener seems to only provide the path.

On Wed, Feb 4, 2015 at 10:58 PM, Zhen Zhang <zz...@linkedin.com> wrote:

>  Hi Varun,
>
>  You can refer to this example:
>
> https://github.com/apache/helix/blob/helix-0.6.x/helix-core/src/test/java/org/apache/helix/store/zk/TestZkHelixPropertyStore.java
>
>  Thanks,
> Jason
>
>  ------------------------------
> *From:* Varun Sharma [varun@pinterest.com]
> *Sent:* Wednesday, February 04, 2015 4:20 PM
> *To:* user@helix.apache.org
> *Subject:* Property store subscription example
>
>   Hi,
>
>  I am planning to use the property store to work around some issues with
> extremely large external views in zk. The work around is to compress
> values, write to property store and subscribe to watch those smaller valued
> properties.
>
>  Is there an example for how to subscribe to the property store ?
>
>  Thanks
> Varun
>

RE: Property store subscription example

Posted by Zhen Zhang <zz...@linkedin.com>.

Hi Varun,

You can refer to this example:
https://github.com/apache/helix/blob/helix-0.6.x/helix-core/src/test/java/org/apache/helix/store/zk/TestZkHelixPropertyStore.java

Thanks,
Jason

________________________________
From: Varun Sharma [varun@pinterest.com]
Sent: Wednesday, February 04, 2015 4:20 PM
To: user@helix.apache.org
Subject: Property store subscription example

Hi,

I am planning to use the property store to work around some issues with extremely large external views in zk. The work around is to compress values, write to property store and subscribe to watch those smaller valued properties.

Is there an example for how to subscribe to the property store ?

Thanks
Varun