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main.go
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main.go
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package main
import (
"fmt"
"flag"
"os"
"github.com/eiannone/keyboard"
"github.com/MakeNowJust/heredoc"
"time"
"strings"
)
const (
colorReset = "\033[0m"
colorRed = "\033[31m"
colorGreen = "\033[32m"
colorYellow = "\033[33m"
colorBlue = "\033[34m"
colorPurple = "\033[35m"
colorCyan = "\033[36m"
colorWhite = "\033[37m"
ClearLine = "\033[2K"
MoveCursorCol1 = "\033[1G"
);
var (
i int = 0
configfilename stringFlag
createfilename stringFlag
scriptfilename stringFlag
exec_loops int64 = 0
exec_time time.Duration
sleep_time time.Duration
Version = "pgSimLoad v.1.3.0 - April 24th 2024"
License = heredoc.Doc(`
**The PostgreSQL License**
Copyright (c) 2022-2024, Crunchy Data Solutions, Inc.
Permission to use, copy, modify, and distribute this software and its
documentation for any purpose, without fee, and without a written agreement is
hereby granted, provided that the above copyright notice and this paragraph
and the following two paragraphs appear in all copies.
IN NO EVENT SHALL CRUNCHY DATA SOLUTIONS, INC. BE LIABLE TO ANY PARTY FOR
DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING
LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION,
EVEN IF CRUNCHY DATA SOLUTIONS, INC. HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
CRUNCHY DATA SOLUTIONS, INC. SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS" BASIS,
AND CRUNCHY DATA SOLUTIONS, INC. HAS NO OBLIGATIONS TO PROVIDE MAINTENANCE,
SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
For any question reach programmer at jean-paul.argudo@crunchydata.com.`)
License_short_notice = heredoc.Doc(`Copyright (c) 2022-2023, Crunchy Data Solutions, Inc.
This program is licensied under The PostgreSQL License. You have a copy
of the full license aside the source code in the file named LICENSE.md.`)
Contact = "You can contact programmer at : Jean-Paul Argudo <jean-paul.argudo@crunchydata.com>\nProject is hosted on https://github.com/CrunchyData/pgSimload"
)
type Config struct {
Hostname string
Port string
Database string
Username string
Password string
Sslmode string
ApplicationName string
}
//String Flags
type stringFlag struct {
set bool
value string
}
func (sf *stringFlag) Set(x string) error {
sf.value = x
sf.set = true
return nil
}
func (sf *stringFlag) String() string {
return sf.value
}
// Function to exit(1) the program putting in red the error message
func exit1(message string, errcode error) {
fmt.Print(string(colorRed))
if errcode== nil {
fmt.Println(message)
} else {
fmt.Println(message,errcode)
}
_ = keyboard.Close()
fmt.Print(string(colorReset))
os.Exit(1)
}
// strings function to pad left, right, given a size of biggest element in the
// list
func LongestOf(s string) int {
length := 0
for _, word := range strings.Split(s, " ") {
if len(word) > length {
length = len(word)
}
}
return length
}
func PadRight(str, pad string, lenght int) string {
for {
str += pad
if len(str) > lenght {
return str[0:lenght]
}
}
}
func PadLeft(str, pad string, lenght int) string {
for {
str = pad + str
if len(str) > lenght {
return str[0:lenght]
}
}
}
func init() {
flag.Var(&configfilename, "config", "JSON config filename")
flag.Var(&createfilename, "create", "JSON create filename")
flag.Var(&scriptfilename, "script", "SQL script filename")
flag.Var(&sessiongucsfilename, "session_parameters", "JSON session gucs filename")
flag.Var(&patroniconfigfilename, "patroni", "JSON Patroni watcher mode config filename")
flag.Var(&kubeconfigfilename , "kube" , "JSON Kube watcher mode config filename")
flag.Var(&gathergucsfilename , "create_gucs_template", "outputs to that JSON filename")
flag.Int64Var(&exec_loops, "loops", 0, "number of SQL-Loop to execute")
flag.DurationVar(&exec_time, "time" , 0, "duration of SQL-Loop execution")
flag.DurationVar(&sleep_time, "sleep", 0, "sleep duration between iterations in SQL-Loop")
}
//function to check flags passed with --flag value
//upon execution of the tool
func CheckFlags () {
help := flag.Bool("help", false, "display some help")
version := flag.Bool("version", false, "display version")
license := flag.Bool("license", false, "display license")
contact := flag.Bool("contact", false, "display where to contact programmers")
flag.Parse()
if *version {
_ = keyboard.Close()
fmt.Printf("%s\n",Version);
os.Exit(0);
}
if *license {
_ = keyboard.Close()
fmt.Printf("%s is licensed under \n",Version);
fmt.Printf("%s\n",License);
os.Exit(0);
}
if *contact {
_ = keyboard.Close()
fmt.Printf("%s\n",Contact);
os.Exit(0);
}
if *help {
_ = keyboard.Close()
fmt.Println("Please read documentation in doc/\nAlternatively, run with -h to show all possible parameters.");
os.Exit(0);
}
if gathergucsfilename.set {
if !configfilename.set {
message := "To create a template JSON file to be used in -session_parameters\n"
message += "You actually have to use a -config config.json in conjunction with it\n"
exit1(message,nil)
} else {
gatherGucs()
_ = keyboard.Close()
os.Exit(0)
}
}
if !patroniconfigfilename.set {
if !kubeconfigfilename.set {
message := "Please read documentation in doc/ since parameters have to be passed"
message += "\nAlternatively, run with -h to show all possible parameters"
if !configfilename.set {
message = message + "\n -config is not set !"
exit1(message,nil)
}
if !scriptfilename.set {
message = message + "\n -script is not set !"
exit1(message,nil)
}
}
}
}
func start_banner (mode string) {
switch (mode) {
case "start":
fmt.Println(string(colorReset))
fmt.Printf("%s\n",License_short_notice)
fmt.Println("=========================================================================")
fmt.Println("Welcome to ",Version)
fmt.Println("=========================================================================")
fmt.Print(string(colorGreen))
case "Patroni-Watcher","Kube-Watcher","SQL-loop":
fmt.Println("About to start in "+mode+" mode")
fmt.Print(string(colorReset))
fmt.Println("=========================================================================")
fmt.Println("Hit <Enter> to Start")
fmt.Println("Hit <Esc> to Exit/Stop anytime after")
}
}
// ***** main ******
func main() {
CheckFlags()
//prints out the start banner
start_banner("start")
if patroniconfigfilename.set {
//adds info to start banner: we're starting in Patroni-monitoring mode
start_banner("Patroni-Watcher")
// Wait for Enter or Esc Key
if err := keyboard.Open(); err != nil {
exit1("Error:\n",err)
}
for {
_, key, err := keyboard.GetKey()
if err != nil {
exit1("Error:\n",err)
}
if key == keyboard.KeyEsc {
break
} else if key == keyboard.KeyEnter {
PatroniWatch()
_ = keyboard.Close()
break
}
}
} else if kubeconfigfilename.set {
//adds info to start banner: we're starting in Kube-watcher mode
start_banner("Kube-Watcher")
// Wait for Enter or Esc Key
if err := keyboard.Open(); err != nil {
exit1("Error:\n",err)
}
for {
_, key, err := keyboard.GetKey()
if err != nil {
exit1("Error:\n",err)
}
if key == keyboard.KeyEsc {
break
} else if key == keyboard.KeyEnter {
KubeWatch()
_ = keyboard.Close()
break
}
}
} else {
//adds info to start banner: we're starting in SQL-loop mode
start_banner("SQL-Loop")
// Wait for Enter or Esc Key
if err := keyboard.Open(); err != nil {
exit1("Error:\n",err)
}
for {
_, key, err := keyboard.GetKey()
if err != nil {
//exit1("Error:\n",err)
}
if key == keyboard.KeyEsc {
break
} else if key == keyboard.KeyEnter {
fmt.Println("")
SQLLoop()
break
}
}
}
_ = keyboard.Close()
}