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SearchServices/search-services/alfresco-search/doc/architecture/decisions/0009-message-driven-content-tracker-next-gen.md
Alex Mukha 3d3c7924f9 Record new decisions about async content tracker
2020-02-05 14:35:32 +00:00

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Message Driven Content Tracker v2

Date: 05/02/2020

Status

WIP

Context

This is a second iteration of content tracking via message bus design. See previous version.

New content tracker implementation will be based on new Search Services architecture (SS v2.0 or next gen). Main context behind this decision is almost the same as for v1 - get more throughput by leveraging new Transform Service.

Decision

The decision is based on version 1. The main differences are:

  • Shared File Store may not be the right option as it is only available for Enterprise. Alternatively the URL to content can point to other locations. (TBC)
  • The change in behaviour requires a major release of Search Services, most likely version 2.0.
  • The changes in Content Repository will be available from version 6.3.
  • The synchronous transformation APIs will remain functional until 7.0.

Details of the architecture to be clarified (WIP).

Consequences

Additional latency will be introduced due to the extra calls when using the Transform Service. Also the transformation capabilities are much more limited.

This design highlights a major difference in behaviour, which requires a major release of Search Services.