Andrey Mashenkov created IGNITE-24321:
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Summary: Avoid return null from CatalogService methods.
Key: IGNITE-24321
URL: https://issues.apache.org/jira/browse/IGNITE-24321
Project: Ignite
Issue Type: Improvement
Reporter: Andrey Mashenkov
Assignee: Andrey Mashenkov
Fix For: 3.1
On one hand, `Catalog` class is an internal container for descriptors and
wasn't designed to be used directly outside the module.
On the other hand `CatalogService` interface has a bunch of similar methods for
accessing catalog internals.
Let's disclose `Catalog` class: describe it in README.md of `ignite-catalog`
module, write javadocs and maybe add some shortcut method (e.g.
`table(schemaName, tableName)`)
Let's remove all the methods, which returns `Catalog` class internals, from
`CatalogService`.
So, `CatalogService` should have few methods that answer the question:
* which catalog version is actual at point-in-time
* which catalog version is earliest/latest
* when catalog is initialized/catalog version is ready by returning a future.
* gets `Catalog` snapshot for version/point-in-time
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