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Requirements
Required to enable quickMarc updates.
Whenever an SRS MARC Bib record is updated, then the corresponding changes need to be made in the Instance fields that are controlled by the tenant's default map.
The default MARC Bib-Inventory Instance map may vary from tenant to tenant. Updates should be made based on the Instance fields mapped/controlled by the specific tenant's default map.
The FOLIO-supplied default MARC-Instance map: https://github.com/folio-org/mod-source-record-manager/blob/master/mod-source-record-manager-server/src/main/resources/rules/rules.json
Approach & Design
SRM exposes the following endpoints for quickMarc to retrieve the MARC record by instanceId and to save the updated MARC record:
| Method | Path | Permissions | Request | Response | Description | Notes |
|---|---|---|---|---|---|---|
| GET | change-manager/parsedRecords?instanceId={instanceId} | change-manager.parsedrecords.get | NA | 200 OK | (A) GET MARC record | {instanceId} - corresponding Instance id |
| PUT | /change-manager/parsedRecords/{id} | change-manager.parsed-records.put | Updated | 204 UPDATED | (B) Update MARC record | {id} - record id |
The actual update of the SRS MARC Record and the corresponding inventory Instance happens using pub-sub approach.
1) Upon receiving the request for update of the MARC record, a new QM_RECORD_UPDATED event is formed and published to mod-pubsub. Event payload contains the following data
- PARSED_RECORD_DTO - received ParsedRecordDto containing updated MARC record
- MAPPING_RULES - MARC-to-Instance default mapping rules
- MAPPING_PARAMS - mapping parameters for populating reference data
- SNAPSHOT_ID (optional) - new Snapshot id to which the updated MARC record will be linked
2) SRS is subscribed to QM_RECORD_UPDATED eventType. When SRS receives the event the following operations are performed:
- a new Snapshot is created
- a new Record is created with incremented generation value and state ACTUAL
- state of the original Record is set to OLD
Steps 2 and 3 are executed in transaction.
3) After the Record is successfully “updated” (records in SRS are not overwritten, new Record is being saved with higher generation, and all the others are marked as OLD), a new QM_SRS_MARC_BIB_RECORD_UPDATED event is published to mod-pubsub with payload:
- MAPPING_RULES (received from SRM) - MARC-to-Instance default mapping rules
- MAPPING_PARAMS (received from SRM)- mapping parameters for populating reference data
- MARC - updated SRS MARC Record
4) mod-inventory is subscribed to QM_SRS_MARC_BIB_RECORD_UPDATED event. When event is received, a new Instance entity is mapped from MARC record using Mapper from data-import-processing-core library. The original Instance is retrieved from mod-inventory-storage, compared to the newly mapped one and updated accordingly.