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abacus-dbclient

v1.1.5

Published

API over a set of DB partitions

Downloads

18

Readme

abacus-dbclient

Distributes DB operations over a set of DB partitions with MongoDB backend.

Dependencies

The module is using mongodb native NodeJS driver.

Implementation

All functions exposed by the API open a collection and then translate the API to Mongo driver primitives.

get

Performs find with the specified _id. Returns the found document or undefined if not found (and not error!). The returned document has _rev set to 1 by default.

put

Performs:

  • update (with {upsert: true} option) if document with _rev is passed or
  • insertOne with the provided document

Returns the input document with id equal to _id and _rev set to 1 by default. Translates 11000 error code into 409 status.

remove

Calls deleteOne with the _id of the document. Returns the input document with id equal to _id and _rev with value from the stored document.

allDocs

Has two flavours based on the options passed. If startkey and endkey are present in the options calls the range variant. Otherwise uses the list one.

  • Range Uses find with:
    • { $gte: opt.startkey, $lte: opt.endkey }, or
    • { $gte: opt.endkey, $lte: opt.startkey } if descending: true
  • List Uses find with { $in: opt.keys }.

Both variants filter out the value field if include_docs: false. They return the found documents with id equal to _id and _rev set to 1 by default.

bulkDocs

Uses ordered bulk operation and:

  • adds in the bulk with upsert().updateOne operations for each document that has _rev
  • inserts with insert operation for document that has no specified _rev

Returns the input documents with id equal to _id and _rev set to 1 by default.

batch_get

Performs find with { $in: [ <id1>, <id2>, ... , <idN> ].

Filters out the value field if include_docs: false. Returns the found documents with id equal to _id and _rev set to 1 by default.

batch_put

Uses ordered bulk operation and:

  • adds in the bulk with upsert().updateOne operations for each document that has _rev
  • inserts with insert operation for document that has no specified _rev

Returns the input documents with id equal to _id and _rev set to 1 by default.

batch_remove

Uses deleteMany with all docs batched. Returns the found documents with id equal to _id and _rev set to 1 by default.