[jira] [Commented] (SENTRY-1600) Define Thrift API for HMS to Sentry notification barrier

["Alexander Kolbasov (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SENTRY-1600?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15882068#comment-15882068 ] 

Alexander Kolbasov commented on SENTRY-1600:
--------------------------------------------

Here is the proposed change to the thrift API:

{code}
/*
 * API for synchronizing between HMS notification events and Sentry.
 *
 * When Sentry gets updates from HMS using HMS Notifications, HMS should
 * should wait after each notification event is generated until the notification
 * is handled by Sentry This preserves the synchronous semantics of DDL statements.
 *
 * The notification synchronization API is private between HMS and Sentry and should
 * not be used by anything else.
 *
 * The API should be used in the following way:
 *
 * 1) HMS creates a notification and stores its ID in the persistent storage
 * 2) HMS sends ID to Sentry
 * 3) Sentry blocks the response until the specified ID is processed by Sentry
 * 4) Sentry responds with the most recent processed ID.
 *
 * Note that the important part is blocking in Sentry until the specified ID
 * is processed. The returned most recent processed ID is intended for debugging
 * purposes only, but may be used in HMS for performance optimizations.
 */

struct TSentrySyncIDRequest {
1: required i32 protocol_version = sentry_common_service.TSENTRY_SERVICE_V2,
2: required i64 id // Requested ID
}

struct TSentrySyncIDResponse {
1: required i64 id // Most recent processed ID
}
{code}

> Define Thrift API for HMS to Sentry notification barrier
> --------------------------------------------------------
>
>                 Key: SENTRY-1600
>                 URL: https://issues.apache.org/jira/browse/SENTRY-1600
>             Project: Sentry
>          Issue Type: Sub-task
>          Components: Sentry
>    Affects Versions: sentry-ha-redesign
>            Reporter: Alexander Kolbasov
>            Assignee: Alexander Kolbasov
>             Fix For: sentry-ha-redesign
>
>
> When HMS performs its operations (e.g. create drop table) when Notifications are used it should wait until HMS processes this notification.
> This JIRA is about Thrift API for that.



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