forked from vitessio/vitess
/
query_list.go
114 lines (100 loc) · 2.94 KB
/
query_list.go
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package tabletserver
import (
"fmt"
"html/template"
"sort"
"sync"
"time"
"github.com/youtube/vitess/go/vt/context"
"github.com/youtube/vitess/go/vt/tabletserver/proto"
)
// QueryDetail is a simple wrapper for Query, Context and PoolConnection
type QueryDetail struct {
query *proto.Query
context context.Context
connID int64
start time.Time
}
// NewQueryDetail creates a new QueryDetail
func NewQueryDetail(query *proto.Query, context context.Context, connID int64) *QueryDetail {
return &QueryDetail{query: query, context: context, connID: connID, start: time.Now()}
}
// QueryList holds a thread safe list of QueryDetails
type QueryList struct {
mu sync.Mutex
queryDetails map[int64]*QueryDetail
connKiller *ConnectionKiller
}
// NewQueryList creates a new QueryList
func NewQueryList(connKiller *ConnectionKiller) *QueryList {
return &QueryList{queryDetails: make(map[int64]*QueryDetail), connKiller: connKiller}
}
// Add adds a QueryDetail to QueryList
func (ql *QueryList) Add(qd *QueryDetail) {
ql.mu.Lock()
defer ql.mu.Unlock()
ql.queryDetails[qd.connID] = qd
}
// Remove removes a QueryDetail from QueryList
func (ql *QueryList) Remove(qd *QueryDetail) {
ql.mu.Lock()
defer ql.mu.Unlock()
delete(ql.queryDetails, qd.connID)
}
// Terminate updates the query status and kills the connection
func (ql *QueryList) Terminate(connID int64) error {
ql.mu.Lock()
defer ql.mu.Unlock()
qd := ql.queryDetails[connID]
if qd == nil {
return fmt.Errorf("query %v not found", connID)
}
if err := ql.connKiller.Kill(connID); err != nil {
return err
}
return nil
}
// TerminateAll terminates all queries and kills the MySQL connections
func (ql *QueryList) TerminateAll() {
ql.mu.Lock()
defer ql.mu.Unlock()
for _, qd := range ql.queryDetails {
ql.connKiller.Kill(qd.connID)
}
}
// QueryDetailzRow is used for rendering QueryDetail in a template
type QueryDetailzRow struct {
Query string
ContextHTML template.HTML
Start time.Time
Duration time.Duration
SessionID int64
TransactionID int64
ConnID int64
State string
ShowTerminateLink bool
}
type byStartTime []QueryDetailzRow
func (a byStartTime) Len() int { return len(a) }
func (a byStartTime) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
func (a byStartTime) Less(i, j int) bool { return a[i].Start.Before(a[j].Start) }
// GetQueryzRows returns a list of QueryDetailzRow sorted by start time
func (ql *QueryList) GetQueryzRows() []QueryDetailzRow {
ql.mu.Lock()
rows := []QueryDetailzRow{}
for _, qd := range ql.queryDetails {
row := QueryDetailzRow{
Query: qd.query.Sql,
ContextHTML: qd.context.HTML(),
Start: qd.start,
Duration: time.Now().Sub(qd.start),
SessionID: qd.query.SessionId,
TransactionID: qd.query.TransactionId,
ConnID: qd.connID,
}
rows = append(rows, row)
}
ql.mu.Unlock()
sort.Sort(byStartTime(rows))
return rows
}