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backend: support external SPARQL and named-graph snapshots

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This commit is contained in:
Oxy8
2026-04-06 13:36:08 -03:00
parent 696844f341
commit 44c1d3eaa6
25 changed files with 1695 additions and 243 deletions
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33
backend_go/snapshot_service.go
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@@ -2,6 +2,7 @@ package main
import (
"context"
"log"
"sync"
)
@@ -24,6 +25,8 @@ type GraphSnapshotService struct {
sparql *AnzoGraphClient
cfg Config
fetchSnapshot func(context.Context, *AnzoGraphClient, Config, int, int, string) (GraphResponse, error)
mu sync.Mutex
cache map[snapshotKey]GraphResponse
inflight map[snapshotKey]*snapshotInflight
@@ -31,10 +34,11 @@ type GraphSnapshotService struct {
func NewGraphSnapshotService(sparql *AnzoGraphClient, cfg Config) *GraphSnapshotService {
return &GraphSnapshotService{
sparql: sparql,
cfg: cfg,
cache: make(map[snapshotKey]GraphResponse),
inflight: make(map[snapshotKey]*snapshotInflight),
sparql: sparql,
cfg: cfg,
fetchSnapshot: fetchGraphSnapshot,
cache: make(map[snapshotKey]GraphResponse),
inflight: make(map[snapshotKey]*snapshotInflight),
}
}
@@ -69,7 +73,20 @@ func (s *GraphSnapshotService) Get(ctx context.Context, nodeLimit int, edgeLimit
s.inflight[key] = inf
s.mu.Unlock()
snap, err := fetchGraphSnapshot(ctx, s.sparql, s.cfg, nodeLimit, edgeLimit, graphQueryID)
log.Printf("[snapshot] build_start graph_query_id=%s node_limit=%d edge_limit=%d detached=true", graphQueryID, nodeLimit, edgeLimit)
go s.buildSnapshotInBackground(key, inf, nodeLimit, edgeLimit, graphQueryID)
select {
case <-ctx.Done():
log.Printf("[snapshot] requester_canceled graph_query_id=%s node_limit=%d edge_limit=%d err=%v build_continues=true", graphQueryID, nodeLimit, edgeLimit, ctx.Err())
return GraphResponse{}, ctx.Err()
case <-inf.ready:
return inf.snapshot, inf.err
}
}
func (s *GraphSnapshotService) buildSnapshotInBackground(key snapshotKey, inf *snapshotInflight, nodeLimit int, edgeLimit int, graphQueryID string) {
snap, err := s.fetchSnapshot(context.Background(), s.sparql, s.cfg, nodeLimit, edgeLimit, graphQueryID)
s.mu.Lock()
inf.snapshot = snap
@@ -81,5 +98,9 @@ func (s *GraphSnapshotService) Get(ctx context.Context, nodeLimit int, edgeLimit
close(inf.ready)
s.mu.Unlock()
return snap, err
if err != nil {
log.Printf("[snapshot] build_done graph_query_id=%s node_limit=%d edge_limit=%d detached=true cached=false err=%v", graphQueryID, nodeLimit, edgeLimit, err)
return
}
log.Printf("[snapshot] build_done graph_query_id=%s node_limit=%d edge_limit=%d detached=true cached=true", graphQueryID, nodeLimit, edgeLimit)
}