[LUCENE-13044][replicator] NRT add configurable commitData for Custom…

[dianjifzm]

… security verification

Description

开放commitData的修改，可以自定义主从同步的安全机制

[github-actions[bot]]

This PR has not had activity in the past 2 weeks, labeling it as stale. If the PR is waiting for review, notify the [email protected] list. Thank you for your contribution!

[stefanvodita]

Hi @dianjifzm! Can you give more context for what you're trying to do? I passed the PR description through Google Translate, but it wasn't enough for me to understand how this is helpful.

[dianjifzm]

Hi @dianjifzm! Can you give more context for what you're trying to do? I passed the PR description through Google Translate, but it wasn't enough for me to understand how this is helpful.

在业务开发过程中，有时为了故障恢复，有时是为了abtest，经常会发生replica切换primary的情况。 目前primary和replica之间主要靠primaryGen做安全验证，这个机制并不可靠。 只要primary的primaryGen大于replica的primaryGen，索引同步就会发生。 而新的primary与replica的索引类型可能都不相同，数据也可能不一致。 为了避免此类问题的发生，就需要自定义的主从验证机制，而这个机制需要放到commitData中。

[github-actions[bot]]

This PR has not had activity in the past 2 weeks, labeling it as stale. If the PR is waiting for review, notify the [email protected] list. Thank you for your contribution!

[mikemccand]

I think this is a reasonable hook to add, but could you maybe add javadocs to the new protected method? Maybe something like:

    /** Applications can subclass and override this method to customize what it stored in commitData for each commit. */

[github-actions[bot]]

This PR has not had activity in the past 2 weeks, labeling it as stale. If the PR is waiting for review, notify the [email protected] list. Thank you for your contribution!