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// Copyright 2017 CoreOS, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package dbtester
import (
"errors"
"fmt"
"time"
"github.com/samuel/go-zookeeper/zk"
"go.uber.org/zap"
"golang.org/x/net/context"
)
var (
zkCreateFlags = int32(0)
zkCreateACL = zk.WorldACL(zk.PermAll)
)
type zkOp struct {
key string
value []byte
staleRead bool
}
func mustCreateConnsZk(endpoints []string, total int64) []*zk.Conn {
zks := make([]*zk.Conn, total)
for i := range zks {
endpoint := endpoints[dialTotal%len(endpoints)]
dialTotal++
conn, _, err := zk.Connect([]string{endpoint}, time.Second)
if err != nil {
panic(err)
}
zks[i] = conn
}
return zks
}
func newPutCreateZK(conn *zk.Conn) ReqHandler {
return func(ctx context.Context, req *request) error {
op := req.zkOp
_, err := conn.Create(op.key, op.value, zkCreateFlags, zkCreateACL)
return err
}
}
func newPutOverwriteZK(conn *zk.Conn) ReqHandler {
// samekey
return func(ctx context.Context, req *request) error {
op := req.zkOp
_, err := conn.Set(op.key, op.value, int32(-1))
return err
}
}
func newGetZK(conn *zk.Conn) ReqHandler {
return func(ctx context.Context, req *request) error {
errt := ""
if !req.zkOp.staleRead {
_, err := conn.Sync("/" + req.zkOp.key)
if err != nil {
errt += err.Error()
}
}
_, _, err := conn.Get("/" + req.zkOp.key)
if err != nil {
if errt != "" {
errt += "; "
}
errt += fmt.Sprintf("%q while getting %q", err.Error(), "/"+req.zkOp.key)
}
if errt != "" {
return errors.New(errt)
}
return nil
}
}
func getTotalKeysZk(lg *zap.Logger, endpoints []string) map[string]int64 {
rs := make(map[string]int64)
stats, ok := zk.FLWSrvr(endpoints, 5*time.Second)
if !ok {
lg.Sugar().Infof("getTotalKeysZk failed with %+v", stats)
for _, ep := range endpoints {
rs[ep] = 0
}
return rs
}
for i, s := range stats {
rs[endpoints[i]] = s.NodeCount
}
return rs
}