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Reduce admin dashboard read amplification

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This commit is contained in:
ius
2026-03-11 16:46:58 +08:00
parent 7455476c60
commit 4167c437a8
6 changed files with 480 additions and 47 deletions
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94
backend/internal/handler/admin/dashboard_snapshot_v2_handler.go
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@@ -1,7 +1,9 @@
package admin
import (
"context"
"encoding/json"
"errors"
"net/http"
"strconv"
"strings"
@@ -111,20 +113,45 @@ func (h *DashboardHandler) GetSnapshotV2(c *gin.Context) {
})
cacheKey := string(keyRaw)
if cached, ok := dashboardSnapshotV2Cache.Get(cacheKey); ok {
if cached.ETag != "" {
c.Header("ETag", cached.ETag)
c.Header("Vary", "If-None-Match")
if ifNoneMatchMatched(c.GetHeader("If-None-Match"), cached.ETag) {
c.Status(http.StatusNotModified)
return
}
}
c.Header("X-Snapshot-Cache", "hit")
response.Success(c, cached.Payload)
cached, hit, err := dashboardSnapshotV2Cache.GetOrLoad(cacheKey, func() (any, error) {
return h.buildSnapshotV2Response(
c.Request.Context(),
startTime,
endTime,
granularity,
filters,
includeStats,
includeTrend,
includeModels,
includeGroups,
includeUsersTrend,
usersTrendLimit,
)
})
if err != nil {
response.Error(c, 500, err.Error())
return
}
if cached.ETag != "" {
c.Header("ETag", cached.ETag)
c.Header("Vary", "If-None-Match")
if ifNoneMatchMatched(c.GetHeader("If-None-Match"), cached.ETag) {
c.Status(http.StatusNotModified)
return
}
}
c.Header("X-Snapshot-Cache", cacheStatusValue(hit))
response.Success(c, cached.Payload)
}
func (h *DashboardHandler) buildSnapshotV2Response(
ctx context.Context,
startTime, endTime time.Time,
granularity string,
filters *dashboardSnapshotV2Filters,
includeStats, includeTrend, includeModels, includeGroups, includeUsersTrend bool,
usersTrendLimit int,
) (*dashboardSnapshotV2Response, error) {
resp := &dashboardSnapshotV2Response{
GeneratedAt: time.Now().UTC().Format(time.RFC3339),
StartDate: startTime.Format("2006-01-02"),
@@ -133,10 +160,9 @@ func (h *DashboardHandler) GetSnapshotV2(c *gin.Context) {
}
if includeStats {
stats, err := h.dashboardService.GetDashboardStats(c.Request.Context())
stats, err := h.dashboardService.GetDashboardStats(ctx)
if err != nil {
response.Error(c, 500, "Failed to get dashboard statistics")
return
return nil, errors.New("Failed to get dashboard statistics")
}
resp.Stats = &dashboardSnapshotV2Stats{
DashboardStats: *stats,
@@ -145,8 +171,8 @@ func (h *DashboardHandler) GetSnapshotV2(c *gin.Context) {
}
if includeTrend {
trend, err := h.dashboardService.GetUsageTrendWithFilters(
c.Request.Context(),
trend, _, err := h.getUsageTrendCached(
ctx,
startTime,
endTime,
granularity,
@@ -160,15 +186,14 @@ func (h *DashboardHandler) GetSnapshotV2(c *gin.Context) {
filters.BillingType,
)
if err != nil {
response.Error(c, 500, "Failed to get usage trend")
return
return nil, errors.New("Failed to get usage trend")
}
resp.Trend = trend
}
if includeModels {
models, err := h.dashboardService.GetModelStatsWithFilters(
c.Request.Context(),
models, _, err := h.getModelStatsCached(
ctx,
startTime,
endTime,
filters.UserID,
@@ -180,15 +205,14 @@ func (h *DashboardHandler) GetSnapshotV2(c *gin.Context) {
filters.BillingType,
)
if err != nil {
response.Error(c, 500, "Failed to get model statistics")
return
return nil, errors.New("Failed to get model statistics")
}
resp.Models = models
}
if includeGroups {
groups, err := h.dashboardService.GetGroupStatsWithFilters(
c.Request.Context(),
groups, _, err := h.getGroupStatsCached(
ctx,
startTime,
endTime,
filters.UserID,
@@ -200,34 +224,20 @@ func (h *DashboardHandler) GetSnapshotV2(c *gin.Context) {
filters.BillingType,
)
if err != nil {
response.Error(c, 500, "Failed to get group statistics")
return
return nil, errors.New("Failed to get group statistics")
}
resp.Groups = groups
}
if includeUsersTrend {
usersTrend, err := h.dashboardService.GetUserUsageTrend(
c.Request.Context(),
startTime,
endTime,
granularity,
usersTrendLimit,
)
usersTrend, _, err := h.getUserUsageTrendCached(ctx, startTime, endTime, granularity, usersTrendLimit)
if err != nil {
response.Error(c, 500, "Failed to get user usage trend")
return
return nil, errors.New("Failed to get user usage trend")
}
resp.UsersTrend = usersTrend
}
cached := dashboardSnapshotV2Cache.Set(cacheKey, resp)
if cached.ETag != "" {
c.Header("ETag", cached.ETag)
c.Header("Vary", "If-None-Match")
}
c.Header("X-Snapshot-Cache", "miss")
response.Success(c, resp)
return resp, nil
}
func parseDashboardSnapshotV2Filters(c *gin.Context) (*dashboardSnapshotV2Filters, error) {