consul lock

[ZLBer]

What this PR does:
add consul lock
Which issue(s) this PR fixes:

Fixes #129

Special notes for your reviewer:
@seeflood
Does this PR introduce a user-facing change?:

[ZLBer]

@seeflood
cr没问题了我再添加完整的ut和doc吧

[codecov-commenter]

Codecov Report

Merging #140 (f152baf) into main (5b5b8be) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #140   +/-   ##
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  Coverage   56.90%   56.90%           
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  Files          48       48           
  Lines        2100     2100           
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  Hits         1195     1195           
  Misses        774      774           
  Partials      131      131           

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[seeflood]

抱歉这周事（kai hui)太多，我明天看下！

[github-actions]

This pull request has been automatically marked as stale because it has not had activity in the last 30 days. It will be closed in 7 days if no further activity occurs. Please feel free to give a status update now, ping for review, or re-open when it's ready. Thank you for your contributions!

[github-actions]

This pull request has been automatically closed because it has not had activity in the last 37 days. Please feel free to give a status update now, ping for review, or re-open when it's ready. Thank you for your contributions!

[seeflood]

刚发现这个被机器人自动关了，@ZLBer 这个你还继续搞么~

[ZLBer]

@seeflood 时间有点久了..当时是有什么问题吗

[seeflood]

@ZLBer 噢噢当时的遗留问题就是能否不用事务，因为用事务可能会有很多overhead

[ZLBer]

@seeflood 我这几天看下

[ZLBer]

@seeflood 看了一下之前的方案确实麻烦了。unlock的时候可以直接删除session，这样和他绑定的lock就被释放掉了。但可能返回的状态不会很精确 ，比如没法区分 lock.LOCK_UNEXIST lock.LOCK_BELONG_TO_OTHER 这些。

[seeflood]

但可能返回的状态不会很精确 ，比如没法区分 lock.LOCK_UNEXIST lock.LOCK_BELONG_TO_OTHER 这些。

@ZLBer 我查了下，用PUT xxxx?release=xxx 应该能知道是否已经被别人占用了~见
https://blog.didispace.com/spring-cloud-consul-lock-and-semphore/#lg=1&slide=0
https://www.consul.io/api/kv#create-update-key

[ZLBer]

@seeflood release操作 LOCK_SUCCESS和LOCK_UNEXIST返回true，LOCK_BELONG_TO_OTHER返回false，无法区分前两种，倒是也没有太大影响。之前确实考虑太多了，那我就用最简单的acquire和release来重写？

[seeflood]

@ZLBer 好呀

release操作 LOCK_SUCCESS和LOCK_UNEXIST返回true

恩这两个区分不了倒还好，就当LOCK_SUCCESS就行

[zhenjunMa]

@ZLBer
我看逻辑上面没什么问题了，merge前需要补充两点：

1. 增加一个demo用法示例
2. 单测中的地址链接要改成mock
3. 分布式锁文档中应该需要增加一个consul组件的文档？

[ZLBer]

@zhenjunMa @seeflood Done

already update

[zhenjunMa]

@ZLBer Good job! thanks!