NIFI-12219 Add Xodus Flow History Storage with Migration

[exceptionfactory]

Summary

NIFI-12219 Backports Flow Configuration History persistent storage using JetBrains Xodus as implemented for NIFI-12206 and adds migration capabilities to the support branch for subsequent NiFi version 1 releases.

The EntityStoreAuditService class contains the same implementation as merged for NIFI-12219, and the new FlowConfigurationHistoryMigrator supports automated migration from H2 to Xodus on startup. The migrator checks for the presence of the H2 database file named nifi-flow-audit.mv.db and proceeds with migration when found. The migration process includes checking for older H2 binary formats, supporting all previous versions of H2 from 1.4 through 2.2. The migration process then uses available paging capabilities from the H2-based AuditService to transfer records. Following successful migration, the FlowConfigurationHistoryMigrator renames nifi-flow-audit.mv.db with a backup timestamp extension.

Tracking

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Issue Tracking

• Apache NiFi Jira issue created

Pull Request Tracking

• Pull Request title starts with Apache NiFi Jira issue number, such as NIFI-00000
• Pull Request commit message starts with Apache NiFi Jira issue number, as such NIFI-00000

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Build

• Build completed using mvn clean install -P contrib-check
  • JDK 21

Licensing

• New dependencies are compatible with the Apache License 2.0 according to the License Policy
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Documentation

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[markap14]

Thanks for putting this together, @exceptionfactory! Code looks good. Did a quick test and everything appears to have been migrated properly. Able to see all of the events that I expected, including before/after values, timestamps, action taken, user... +1 will merge to support/nifi-1.x!