forked from mirrors/gotosocial
116 lines
2.1 KiB
Go
116 lines
2.1 KiB
Go
package bun
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import (
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"context"
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"database/sql"
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"reflect"
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"strings"
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"sync/atomic"
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"time"
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"github.com/uptrace/bun/schema"
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)
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type QueryEvent struct {
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DB *DB
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QueryAppender schema.Query
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Query string
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QueryArgs []interface{}
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StartTime time.Time
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Result sql.Result
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Err error
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Stash map[interface{}]interface{}
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}
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func (e *QueryEvent) Operation() string {
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if e.QueryAppender != nil {
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return e.QueryAppender.Operation()
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}
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return queryOperation(e.Query)
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}
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func queryOperation(query string) string {
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if idx := strings.IndexByte(query, ' '); idx > 0 {
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query = query[:idx]
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}
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if len(query) > 16 {
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query = query[:16]
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}
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return query
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}
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type QueryHook interface {
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BeforeQuery(context.Context, *QueryEvent) context.Context
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AfterQuery(context.Context, *QueryEvent)
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}
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func (db *DB) beforeQuery(
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ctx context.Context,
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queryApp schema.Query,
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query string,
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queryArgs []interface{},
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) (context.Context, *QueryEvent) {
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atomic.AddUint32(&db.stats.Queries, 1)
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if len(db.queryHooks) == 0 {
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return ctx, nil
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}
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event := &QueryEvent{
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DB: db,
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QueryAppender: queryApp,
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Query: query,
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QueryArgs: queryArgs,
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StartTime: time.Now(),
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}
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for _, hook := range db.queryHooks {
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ctx = hook.BeforeQuery(ctx, event)
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}
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return ctx, event
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}
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func (db *DB) afterQuery(
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ctx context.Context,
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event *QueryEvent,
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res sql.Result,
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err error,
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) {
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switch err {
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case nil, sql.ErrNoRows:
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// nothing
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default:
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atomic.AddUint32(&db.stats.Errors, 1)
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}
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if event == nil {
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return
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}
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event.Result = res
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event.Err = err
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db.afterQueryFromIndex(ctx, event, len(db.queryHooks)-1)
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}
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func (db *DB) afterQueryFromIndex(ctx context.Context, event *QueryEvent, hookIndex int) {
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for ; hookIndex >= 0; hookIndex-- {
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db.queryHooks[hookIndex].AfterQuery(ctx, event)
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}
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}
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//------------------------------------------------------------------------------
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func callBeforeScanHook(ctx context.Context, v reflect.Value) error {
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return v.Interface().(schema.BeforeScanHook).BeforeScan(ctx)
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}
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func callAfterScanHook(ctx context.Context, v reflect.Value) error {
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return v.Interface().(schema.AfterScanHook).AfterScan(ctx)
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}
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