That is correct. RecallGraph (RG) can only track histories for docs
which are written through its own API. In the scenario you have
described, unless a database natively supports document versioning OOTB
(so that it can intercept all document writes no matter what the source)
there is no direct way to enable history tracking.
However, depending on your architecture, one or a combination of the
following approaches might yield a viable workaround:
1. Use arangochair <https://github.com/baslr/arangochair> to listen in
on incoming writes and REPLICATE them over to RG (installed on a
separate database to prevent collection name collisions).
2. If the data access layer in your application is flexible enough,
add a sink/destination pointing to RG so that your existing API
serves as the primary sink, and RG serves as a (possibly async)
secondary (this would perform slightly faster than the first
approach due to one less round trip, but is harder to implement).
Either approach would incur some data duplication, but lets you
integrate RG non-intrusively (and outside of the critical path) into
your existing stack. At a later point of time, if things work smoothly
enough with RG, you may even choose to discard your primary sink altogether.
Regards,
Aditya Mukhopadhyay
On 06/03/2020 1:13 pm, Ajit Singh Rajawat wrote:
Hi Aditya,
Thanks for you response. This service is helpful to keep track of
collections but as i gone throw it this will only keep track of those
document which will be created by its api.
I have my own API to manipulate collections, i want to keep history
for all these collections.
If this service have this use case and i missed it will you please
provide how to work with it.
On Friday, March 6, 2020 at 11:26:47 AM UTC+5:30, Aditya Mukhopadhyay
wrote:
Try https://github.com/RecallGraph/RecallGraph
<https://github.com/RecallGraph/RecallGraph>
It is a Foxx microservice for ArangoDB, and is designed exactly
for this use case.
Regards,
Aditya Mukhopadhyay
On 06/03/2020 11:08 am, Ajit Singh Rajawat wrote:
I need to maintain a record/history of collections in which i can
see previous and updated state of particular document. Is it
possible to do so ? If yes, How ?
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