[jira] [Commented] (THRIFT-5587) Introduce uuid as additional builtin type

["Liu Jiayu (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/THRIFT-5587?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17547940#comment-17547940 ] 

Liu Jiayu commented on THRIFT-5587:
-----------------------------------

I agree with that:
 * for binary use the 16 bytes and byte ordering defined in RFC
 * for Thrift JSON use the dashed canonical form, no huge use cases for other types, since users may just choose to use string instead
 ** one caveat is whether to ignore casing (in the RFC it is case insensitive)

I'm not sure why 3 is a concern if a library / language does not have built-in support for UUID. But I think the general rule is to default to use stdlib if present, but each language can add a param to tell the generator to generate library dependent code if it is appropriate and needed.

A brief survey of uuid support:
 * Java has JDK support [https://docs.oracle.com/javase/7/docs/api/java/util/UUID.html] since 1.5 (we are currently at Java 8)
 ** Kotlin follows that
 * Rust defers to a library [https://docs.rs/uuid/latest/uuid/index.html] although it used to be part of the library
 * Python3 has built in support [https://docs.python.org/3/library/uuid.html]
 * JS (node) has multiple UUID libraries, e.g. [https://www.npmjs.com/package/uuid]

> Introduce uuid as additional builtin type
> -----------------------------------------
>
>                 Key: THRIFT-5587
>                 URL: https://issues.apache.org/jira/browse/THRIFT-5587
>             Project: Thrift
>          Issue Type: New Feature
>          Components: Compiler (General)
>            Reporter: Jens Geyer
>            Assignee: Jens Geyer
>            Priority: Major
>
> I hereby propose to add *{{uuid}}* as an additional built-in basic type.
> *Rationale:*
>  * Uuids (or Guids) are a state of the art and well-understood way to identitify data entities.
>  * There is support in next to all languages' runtimes to generate, convert and store such data.
>  * Although conversion to and from string or binary is certainly possible, it is also rather cumbersome.
>  * A distinct datatype enables us to sent it in the most suitable way across the wire: JSON=text, Compact=binary
> *Remarks*
>  * -I am open to discuss the term "guid" vs "uuid". Coming from NET platforms I would tend to guid, but I am open to uuid (or even both) as well. That's just a detail.-
>  * If no significant concern is raised, I would move on and implement C#, Delphi and Haxe bindings (as sub-tasks) myself and leave the rest to the community.
>  



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