forked from etcd-io/etcd
/
util.go
52 lines (46 loc) · 1.3 KB
/
util.go
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// Copyright 2015 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 cmd
import (
"crypto/rand"
"fmt"
"os"
"strings"
"github.com/coreos/etcd/Godeps/_workspace/src/google.golang.org/grpc"
)
var (
// dialTotal counts the number of mustCreateConn calls so that endpoint
// connections can be handed out in round-robin order
dialTotal int
)
func mustCreateConn() *grpc.ClientConn {
eps := strings.Split(endpoints, ",")
endpoint := eps[dialTotal%len(eps)]
dialTotal++
conn, err := grpc.Dial(endpoint)
if err != nil {
fmt.Fprintf(os.Stderr, "dial error: %v\n", err)
os.Exit(1)
}
return conn
}
func mustRandBytes(n int) []byte {
rb := make([]byte, n)
_, err := rand.Read(rb)
if err != nil {
fmt.Fprintf(os.Stderr, "failed to generate value: %v\n", err)
os.Exit(1)
}
return rb
}