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https://issues.apache.org/jira/browse/YARN-9000?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Oleksandr Shevchenko reassigned YARN-9000:
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Assignee: Oleksandr Shevchenko
> Add missing data access methods to webapp entities classes
> ----------------------------------------------------------
>
> Key: YARN-9000
> URL: https://issues.apache.org/jira/browse/YARN-9000
> Project: Hadoop YARN
> Issue Type: Improvement
> Reporter: Oleksandr Shevchenko
> Assignee: Oleksandr Shevchenko
> Priority: Minor
>
> From Hadoop side, we have entity classes which represent the data which can
> be accessed via REST. All these classes are placed in .../webapp/dao packages
> (for example
> org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.NodeInfo).
> Typically these classes are created via constructors (some classes have
> setters) in controllers and then is marshaled to XML/JSON format for data
> transfer. Therefore, these classes are used more like as DTO.
> We want to write some UI tests to verify the both YARN Web UIs (current ui
> and ui2). We need to get some information from REST and compare with
> information which displayed on UI.
> The problem is we can't use for it the same entities from Hadoop. Because we
> can't create these entities and set needed data from UI since many getters
> and setters are missed. So, we will forced to write some layer which
> represents the same data and exactly copies webapp/dao classes but includes
> needed getters and setters.
> Access methods are not unified. Some classes have only getters, some have
> several setters, some have all the necessary getters and setters. In all
> classes, we have a different set of methods, this is not controlled, new
> methods are added as necessary. We open a lot of tickets for adding a
> particular method to a particular class, this lead to some overhead.
> In this ticket, I propose to unify access to the data and add all getters and
> setters for all YARN webapp/dao classes (I will create a separated ticket for
> MapReduce project if the idea will be approved and I will start working on
> this issue).
> Thanks a lot for any comments and attention to this problem!
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