Bruno
437dcc875c
* Integrate mt querier with query caching * typo * let the caller set cache status response header * fix TestQueryAPI * make gen-go * handle CachingServiceClient being nil and make gen-go * include namespace in cache key * set signed in user namespace in query_test.go * fix test * remove commented out code * undo services/query/query.go changes * make gen-go * remove namespace requirement * fix tests * fix test * remove namespace from SignedInUser in tests * make gen-go
Query service
This query service aims to replace the existing /api/ds/query, while preserving the same parsing and expression handling as /api/ds/query
Current /api/ds/query workflow
sequenceDiagram
autonumber
actor User as User or Process
participant api as /api/ds/query
participant db as Storage<br/>(SQL)
participant ds as Datasource<br/>Plugin
participant expr as Expression<br/>Engine
User->>api: POST Query
loop Each query
api->>api: Parse query
api->>db: Get ds config<br>and secrets
db->>api:
end
alt No expressions
alt Single datasource
api->>ds: QueryData
else Multiple datasources
loop Each datasource (concurrently)
api->>ds: QueryData
end
api->>api: Wait for results
end
else Expressions exist
api->>expr: Calculate expressions graph
loop Each node (eg, refID)
alt Is query
expr->>ds: QueryData
else Is expression
expr->>expr: Process
end
end
end
api->>User: return results
/apis/query.grafana.app (in single tenant grafana)
sequenceDiagram
autonumber
actor User as User or Process
participant api as /apis/query.grafana.app
participant db as Storage<br/>(CloudConfig)
participant ds as Datasource<br/>Plugin
participant expr as Expression<br/>Engine
User->>api: POST Query
loop Each query
api->>api: Parse query
api->>db: Get ds config<br>and secrets
db->>api:
end
alt Expressions exist
api->>expr: Calculate expressions graph
loop Each node (eg, refID)
alt Is query
expr->>ds: QueryData
else Is expression
expr->>expr: Process
end
end
else No expressions
alt Single datasource
api->>ds: QueryData
else Multiple datasources
loop Each datasource (concurrently)
api->>ds: QueryData
end
api->>api: Wait for results
end
end
api->>User: return results