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// Tideland Go Library - Redis Client - Tools
//
// Copyright (C) 2009-2017 Frank Mueller / Oldenburg / Germany
//
// All rights reserved. Use of this source code is governed
// by the new BSD license.
package redis
//--------------------
// IMPORTS
//--------------------
import (
"fmt"
"strconv"
"strings"
"github.com/tideland/golib/errors"
"github.com/tideland/golib/logger"
)
//--------------------
// TOOLS
//--------------------
// valuer describes any type able to return a list of values.
type valuer interface {
Len() int
Values() []Value
}
// join builds a byte slice out of some parts.
func join(parts ...interface{}) []byte {
tmp := []byte{}
for _, part := range parts {
switch typedPart := part.(type) {
case []byte:
tmp = append(tmp, typedPart...)
case string:
tmp = append(tmp, []byte(typedPart)...)
case int:
tmp = append(tmp, []byte(strconv.Itoa(typedPart))...)
default:
tmp = append(tmp, []byte(fmt.Sprintf("%v", typedPart))...)
}
}
return tmp
}
// valueToBytes converts a value into a byte slice.
func valueToBytes(value interface{}) []byte {
switch typedValue := value.(type) {
case string:
return []byte(typedValue)
case []byte:
return typedValue
case []string:
return []byte(strings.Join(typedValue, "\r\n"))
case map[string]string:
tmp := make([]string, len(typedValue))
i := 0
for k, v := range typedValue {
tmp[i] = fmt.Sprintf("%v:%v", k, v)
i++
}
return []byte(strings.Join(tmp, "\r\n"))
case Hash:
tmp := []byte{}
for k, v := range typedValue {
kb := valueToBytes(k)
vb := valueToBytes(v)
tmp = append(tmp, kb...)
tmp = append(tmp, vb...)
}
return tmp
}
return []byte(fmt.Sprintf("%v", value))
}
// keyValueArgsToKeys converts a mixed number of keys and values
// into a slice containing the keys.
func keyValueArgsToKeys(kvs ...interface{}) []string {
keys := []string{}
ok := true
for _, k := range kvs {
if ok {
key := string(valueToBytes(k))
keys = append(keys, key)
}
ok = !ok
}
return keys
}
// buildInterfaces creates a slice of interfaces out
// of the passed arguments. Found string or interface
// slices are flattened.
func buildInterfaces(values ...interface{}) []interface{} {
ifcs := []interface{}{}
for _, value := range values {
switch v := value.(type) {
case []string:
for _, s := range v {
ifcs = append(ifcs, s)
}
case []interface{}:
for _, i := range v {
ifcs = append(ifcs, i)
}
default:
ifcs = append(ifcs, v)
}
}
return ifcs
}
// containsPatterns checks, if the channel contains a pattern
// to subscribe to or unsubscribe from multiple channels.
func containsPattern(channel interface{}) bool {
ch := channel.(string)
if strings.IndexAny(ch, "*?[") != -1 {
return true
}
return false
}
// logCommand logs a command and its execution status.
func logCommand(cmd string, args []interface{}, err error, log bool) {
// Format the command for the log entry.
formatArgs := func() string {
if args == nil || len(args) == 0 {
return "(none)"
}
output := make([]string, len(args))
for i, arg := range args {
output[i] = string(valueToBytes(arg))
}
return strings.Join(output, " / ")
}
logOutput := func() string {
format := "CMD %s ARGS %s %s"
if err == nil {
return fmt.Sprintf(format, cmd, formatArgs(), "OK")
}
return fmt.Sprintf(format, cmd, formatArgs(), "ERROR "+err.Error())
}
// Log positive commands only if wanted, errors always.
if err != nil {
if errors.IsError(err, ErrServerResponse) || errors.IsError(err, ErrTimeout) {
return
}
logger.Errorf(logOutput())
} else if log {
logger.Infof(logOutput())
}
}
// EOF
|
