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From "Everett Toews (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (JCLOUDS-687) Configurable API/Provider Default Page Size
Date Tue, 02 Sep 2014 15:22:21 GMT

    [ https://issues.apache.org/jira/browse/JCLOUDS-687?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14118263#comment-14118263
] 

Everett Toews commented on JCLOUDS-687:
---------------------------------------

Before starting coding on this, we need to ask some questions and consider whether or not
it's a good idea. Something very similar also came up during development for support of OpenStack
Marconi. Please familiarize yourself with [this comment thread|https://github.com/jclouds/jclouds-labs-openstack/pull/46#issuecomment-27277902].

Some questions:

1. The description itself says "page sizes differ between APIs" so how does only two new constants
address this for all APIs? Don't you need constants for each API?
1. What are the initial values for "PROPERTY_PAGE_SIZE" or "PROPERTY_DEFAULT_PAGE_SIZE"? Whatever
the initial values, they are going to be wrong most of the time because they will vary from
service to service and deployment to deployment.
1. How are the proper values for "PROPERTY_PAGE_SIZE" or "PROPERTY_DEFAULT_PAGE_SIZE" set?

1. Why are we duplicating service side logic (that will vary from service to service and deployment
to deployment) in the clients?

[~nacx] and [~andrewp] may have more questions and more to say on this approach too.

> Configurable API/Provider Default Page Size
> -------------------------------------------
>
>                 Key: JCLOUDS-687
>                 URL: https://issues.apache.org/jira/browse/JCLOUDS-687
>             Project: jclouds
>          Issue Type: Improvement
>          Components: jclouds-core
>    Affects Versions: 1.6.0, 1.7.0, 1.8.0
>            Reporter: Jeremy Daggett
>            Assignee: Jeremy Daggett
>            Priority: Minor
>              Labels: jclouds, openstack
>             Fix For: 2.0.0
>
>
> Each OpenStack API has a default page size that can be returned by the service. The page
sizes differ between APIs and there should be a way to reflect this in API/provider configuration.
The page size is typically used in the list/get related operations.
> The opportunity arises to expand this to all APIs that have a default page size by introducing
a new constant "PROPERTY_PAGE_SIZE" or "PROPERTY_DEFAULT_PAGE_SIZE" to the {{org.jclouds.Constants}}
class.



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