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Remove other allocations in psql

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This commit is contained in:
Vikram Rangnekar 2019-06-01 19:48:42 -04:00
parent 77e56643c5
commit f9fc5dd7de
5 changed files with 152 additions and 48 deletions
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22
psql/psql.go
View File

@ -44,20 +44,24 @@ func (c *Compiler) IDColumn(table string) string {
return t.PrimaryCol
}
func (c *Compiler) Compile(qc *qcode.QCode) (uint32, []byte, error) {
func (c *Compiler) CompileEx(qc *qcode.QCode) (uint32, []byte, error) {
w := &bytes.Buffer{}
skipped, err := c.Compile(qc, w)
return skipped, w.Bytes(), err
}
func (c *Compiler) Compile(qc *qcode.QCode, w *bytes.Buffer) (uint32, error) {
if len(qc.Query.Selects) == 0 {
return 0, nil, errors.New("empty query")
return 0, errors.New("empty query")
}
root := &qc.Query.Selects[0]
st := util.NewStack()
ti, err := c.getTable(root)
if err != nil {
return 0, nil, err
return 0, err
}
w := &bytes.Buffer{}
st.Push(&selectBlockClose{nil, root})
st.Push(&selectBlock{nil, root, qc, ti, c})
@ -82,7 +86,7 @@ func (c *Compiler) Compile(qc *qcode.QCode) (uint32, []byte, error) {
case *selectBlock:
skipped, err := v.render(w)
if err != nil {
return 0, nil, err
return 0, err
}
ignored |= skipped
@ -94,7 +98,7 @@ func (c *Compiler) Compile(qc *qcode.QCode) (uint32, []byte, error) {
ti, err := c.getTable(child)
if err != nil {
return 0, nil, err
return 0, err
}
st.Push(&joinClose{child})
@ -113,7 +117,7 @@ func (c *Compiler) Compile(qc *qcode.QCode) (uint32, []byte, error) {
}
if err != nil {
return 0, nil, err
return 0, err
}
}
@ -121,7 +125,7 @@ func (c *Compiler) Compile(qc *qcode.QCode) (uint32, []byte, error) {
alias(w, `done_1337`)
w.WriteString(`;`)
return ignored, w.Bytes(), nil
return ignored, nil
}
func (c *Compiler) getTable(sel *qcode.Select) (*DBTableInfo, error) {

13
psql/psql_test.go
View File

@ -1,6 +1,7 @@
package psql
import (
"bytes"
"log"
"os"
"testing"
@ -128,7 +129,7 @@ func compileGQLToPSQL(gql string) ([]byte, error) {
return nil, err
}
_, sqlStmt, err := pcompile.Compile(qc)
_, sqlStmt, err := pcompile.CompileEx(qc)
if err != nil {
return nil, err
}
@ -503,13 +504,21 @@ func BenchmarkCompileGQLToSQL(b *testing.B) {
}
}`
w := &bytes.Buffer()
b.ResetTimer()
b.ReportAllocs()
for n := 0; n < b.N; n++ {
_, err := compileGQLToPSQL(gql)
qc, err := qcompile.CompileQuery(gql)
if err != nil {
b.Fatal(err)
}
_, sqlStmt, err := pcompile.Compile(qc, w)
if err != nil {
b.Fatal(err)
}
w.Reset()
}
}

9
serv/auth_rails.go
View File

@ -4,7 +4,6 @@ import (
"context"
"errors"
"fmt"
"log"
"net/http"
"net/url"
@ -20,7 +19,7 @@ func railsRedisHandler(next http.HandlerFunc) http.HandlerFunc {
}
if len(conf.Auth.Rails.URL) == 0 {
log.Fatal(errors.New("no auth.rails.url defined"))
logger.Fatal(errors.New("no auth.rails.url defined"))
}
rp := &redis.Pool{
@ -79,12 +78,12 @@ func railsMemcacheHandler(next http.HandlerFunc) http.HandlerFunc {
}
if len(conf.Auth.Rails.URL) == 0 {
log.Fatal(errors.New("no auth.rails.url defined"))
logger.Fatal(errors.New("no auth.rails.url defined"))
}
rURL, err := url.Parse(conf.Auth.Rails.URL)
if err != nil {
log.Fatal(err)
logger.Fatal(err)
}
mc := memcache.New(rURL.Host)
@ -127,7 +126,7 @@ func railsCookieHandler(next http.HandlerFunc) http.HandlerFunc {
ra, err := railsAuth(conf)
if err != nil {
log.Fatal(err)
logger.Fatal(err)
}
return func(w http.ResponseWriter, r *http.Request) {

144
serv/core.go
View File

@ -4,10 +4,10 @@ import (
"bytes"
"context"
"encoding/json"
"fmt"
"errors"
"io"
"net/http"
"strings"
"os"
"time"
"github.com/cespare/xxhash/v2"
@ -62,17 +62,117 @@ func (c *coreContext) handleReq(w io.Writer, req *http.Request) error {
// these values contain the id to be used with fetching remote data
from := jsn.Get(data, fids)
var to []jsn.Field
switch {
case len(from) == 1:
to, err = c.resolveRemote(req, h, from[0], sel, sfmap)
case len(from) > 1:
to, err = c.resolveRemotes(req, h, from, sel, sfmap)
default:
return errors.New("something wrong no remote ids found in db response")
}
if err != nil {
return err
}
var ob bytes.Buffer
err = jsn.Replace(&ob, data, from, to)
if err != nil {
return err
}
return c.render(w, ob.Bytes())
}
func (c *coreContext) resolveRemote(
req *http.Request,
h *xxhash.Digest,
field jsn.Field,
sel []qcode.Select,
sfmap map[uint64]*qcode.Select) ([]jsn.Field, error) {
// replacement data for the marked insertion points
// key and value will be replaced by whats below
toA := [1]jsn.Field{}
to := toA[:0]
// use the json key to find the related Select object
k1 := xxhash.Sum64(field.Key)
s, ok := sfmap[k1]
if !ok {
return nil, nil
}
p := sel[s.ParentID]
// then use the Table nme in the Select and it's parent
// to find the resolver to use for this relationship
k2 := mkkey(h, s.Table, p.Table)
r, ok := rmap[k2]
if !ok {
return nil, nil
}
id := jsn.Value(field.Value)
if len(id) == 0 {
return nil, nil
}
st := time.Now()
b, err := r.Fn(req, id)
if err != nil {
return nil, err
}
if conf.EnableTracing {
c.addTrace(s, st)
}
if len(r.Path) != 0 {
b = jsn.Strip(b, r.Path)
}
var ob bytes.Buffer
if len(s.Cols) != 0 {
err = jsn.Filter(&ob, b, colsToList(s.Cols))
if err != nil {
return nil, err
}
} else {
ob.WriteString("null")
}
to[0] = jsn.Field{[]byte(s.FieldName), ob.Bytes()}
return to, nil
}
func (c *coreContext) resolveRemotes(
req *http.Request,
h *xxhash.Digest,
from []jsn.Field,
sel []qcode.Select,
sfmap map[uint64]*qcode.Select) ([]jsn.Field, error) {
// replacement data for the marked insertion points
// key and value will be replaced by whats below
to := make([]jsn.Field, 0, len(from))
for _, id := range from {
// use the json key to find the related Select object
k1 := xxhash.Sum64(id.Key)
s, ok := sfmap[k1]
if !ok {
continue
return nil, nil
}
p := sel[s.ParentID]
@ -82,19 +182,19 @@ func (c *coreContext) handleReq(w io.Writer, req *http.Request) error {
r, ok := rmap[k2]
if !ok {
continue
return nil, nil
}
id := jsn.Value(id.Value)
if len(id) == 0 {
continue
return nil, nil
}
st := time.Now()
b, err := r.Fn(req, id)
if err != nil {
return err
return nil, err
}
if conf.EnableTracing {
@ -110,29 +210,19 @@ func (c *coreContext) handleReq(w io.Writer, req *http.Request) error {
if len(s.Cols) != 0 {
err = jsn.Filter(&ob, b, colsToList(s.Cols))
if err != nil {
return err
return nil, err
}
} else {
ob.WriteString("null")
}
f := jsn.Field{[]byte(s.FieldName), ob.Bytes()}
to = append(to, f)
to = append(to, jsn.Field{[]byte(s.FieldName), ob.Bytes()})
}
var ob bytes.Buffer
err = jsn.Replace(&ob, data, from, to)
if err != nil {
return err
}
return c.render(w, ob.Bytes())
return to, nil
}
func (c *coreContext) resolveSQL(qc *qcode.QCode, vars variables) (
[]byte, uint32, error) {
func (c *coreContext) resolveSQL(qc *qcode.QCode, vars variables) ([]byte, uint32, error) {
// var entry []byte
// var key string
@ -153,15 +243,17 @@ func (c *coreContext) resolveSQL(qc *qcode.QCode, vars variables) (
// }
// }
skipped, stmts, err := pcompile.Compile(qc)
stmt := &bytes.Buffer{}
skipped, err := pcompile.Compile(qc, stmt)
if err != nil {
return nil, 0, err
}
t := fasttemplate.New(stmts[0], openVar, closeVar)
t := fasttemplate.New(stmt.String(), openVar, closeVar)
var sqlStmt strings.Builder
_, err = t.Execute(&sqlStmt, vars)
stmt.Reset()
_, err = t.Execute(stmt, vars)
if err == errNoUserID &&
authFailBlock == authFailBlockPerQuery &&
@ -173,10 +265,10 @@ func (c *coreContext) resolveSQL(qc *qcode.QCode, vars variables) (
return nil, 0, err
}
finalSQL := sqlStmt.Bytes()
finalSQL := stmt.String()
if conf.DebugLevel > 0 {
fmt.Println(finalSQL)
os.Stdout.WriteString(finalSQL)
}
// if cacheEnabled {

12
serv/serv.go
View File

@ -5,7 +5,6 @@ import (
"errors"
"flag"
"fmt"
"log"
"net/http"
"os"
"os/signal"
@ -156,6 +155,7 @@ func initCompilers(c *config) (*qcode.Compiler, *psql.Compiler, error) {
DefaultFilter: c.DB.Defaults.Filter,
FilterMap: c.getFilterMap(),
Blacklist: c.DB.Defaults.Blacklist,
KeepArgs: false,
})
if err != nil {
@ -178,17 +178,17 @@ func Init() {
conf, err = initConf()
if err != nil {
log.Fatal(err)
logger.Fatal(err)
}
db, err = initDB(conf)
if err != nil {
log.Fatal(err)
logger.Fatal(err)
}
qcompile, pcompile, err = initCompilers(conf)
if err != nil {
log.Fatal(err)
logger.Fatal(err)
}
initResolvers()
@ -212,14 +212,14 @@ func startHTTP() {
<-sigint
if err := srv.Shutdown(context.Background()); err != nil {
log.Printf("http: %v", err)
logger.Printf("http: %v", err)
}
close(idleConnsClosed)
}()
srv.RegisterOnShutdown(func() {
if err := db.Close(); err != nil {
log.Println(err)
logger.Println(err)
}
})