feat(integrations/spring): add spring project module

[hezhangjian]

Rationale for this change

Related to #4756
See more context in https://lists.apache.org/thread/13fhp5s2lrbpgdl129gt7zbpd3gms8bb

What changes are included in this PR?

• introduce spring opendal modules

[Xuanwo]

Thanks a lot for the PR. I'll get to this after OpenDAL 0.49 is released.

[hezhangjian]

ping @Xuanwo @tisonkun

[PsiACE]

Please refer to the other README files to add some basic information about this integration.

[tisonkun]

I'd prefer to call it "Apache OpenDAL Spring Integrations". Or in details like "Apache OpenDAL Spring Boot Starter".

This follow the name conventions that a thrid party plugin name as <third-party>-spring-xxx.

[Xuanwo]

I take a look over spring-boot-starter-data-redis and found that they are in three artifactId:

• spring-data-redis
• spring-boot-starter-data-redis
• spring-boot-starter-data-redis-reactive

Should we follow the same pattern that have three artifact instead of module?

[hezhangjian]

@Xuanwo I think you may misunderstand module and artifactId's definition. Every library has an artifactId, which is the smallest unit of reference. Some libraries are responsible for managing other libraries and do not directly contain code themselves; they use a to manage modules or sub-projects (in Maven 4.0, these will be referred to as sub-projects instead of modules).

[Xuanwo]

How about spring-data-opendal? I'm guessing it's different with spring-opendal?

[Xuanwo]

How about spring-boot-starter-data-opendal?

[Xuanwo]

How about spring-boot-starter-data-opendal-reactive?

[Xuanwo]

should be opendal

[hezhangjian]

@Xuanwo Fixed

[hezhangjian]

@Xuanwo @tisonkun

I hope that in the end we use the following naming convention:

<module>opendal-spring</module>
<module>opendal-spring-starter</module>
<module>opendal-spring-starter-reactive</module>

Reasons:

1. Indeed, opendal-spring-starter would be more suitable for third parties. spring-starter-opendal might lead users to expect version management aligned with Spring.
2. As for opendal-spring-starter or opendal-spring-data-starter, I believe the data part is unnecessary. Spring Data is a sub-project of Spring, and we currently do not have that kind of relationship.

Let me know if there's anything wrong.

[hezhangjian]

@PsiACE @tisonkun @Xuanwo PTAL,thanks

[Xuanwo]

2. As for opendal-spring-starter or opendal-spring-data-starter, I believe the data part is unnecessary. Spring Data is a sub-project of Spring, and we currently do not have that kind of relationship.

Hi, it looks good to me to remove data, but boot should still be kept? My current understanding is there is no spring-starter but spring-boot-starter.

[tisonkun]

Yes. Let me push a follow up and merge this.

[Xuanwo]

Thanks!

[tisonkun]

Personally I'd prefer to use dependency management rather than inherit from spring boot, as in https://docs.spring.io/spring-boot/maven-plugin/using.html#using.import

But this is OK for now.

[hezhangjian]

@Xuanwo Sorry, It was a typo, boot is in the code indeedly.