testtest

job.go

@@ -29,8 +29,8 @@ func createJob(jobTypeID int32, priority int32, userID64 int64, schedule time.Ti
 		return 0, err
 	}
 
-	stmt, err = db.Prepare(`INSERT INTO obj_job	(obj_id, priority, user_id, status, schedule, is_done, in_work, inserted, pulled, started, ended,  payload)
-								 VALUES 		(?,      ?,        ?,       ?,      ?,        0,       0,       ?,        NULL,   NULL,    NULL, ?);`)
+	stmt, err = db.Prepare(`INSERT INTO obj_job	(obj_id, priority, user_id, status, seq_nr, schedule, is_done, in_work, inserted, pulled, started, ended,  payload)
+								 VALUES 		(?,      ?,        ?,       ?,      NULL,   ?,        0,       0,       ?,        NULL,   NULL,    NULL, ?);`)
 	logOnError(err, "createJob : prepare insert obj_job")
 	if err != nil {
 		return 0, err
@@ -108,14 +108,15 @@ func loadCurrentJobs() ([]Job, error) {
 	)
 
 	t := time.Now()
+	r := RndInt64()
 
-	_, err := db.Exec("UPDATE obj_job j SET j.pulled = ?, j.in_work = 1 WHERE j.is_done = 0 AND j.in_work = 0 AND j.schedule <= ? ORDER BY j.priority ASC, j.obj_id ASC LIMIT ?;", t, t, SQLJobSliceSize)
+	_, err := db.Exec("UPDATE obj_job j SET j.pulled = ?, j.in_work = 1, j.seq_nr = ? WHERE j.is_done = 0 AND j.in_work = 0 AND j.schedule <= ? ORDER BY j.priority ASC, j.obj_id ASC LIMIT ?;", t, r, t, SQLJobSliceSize)
 	logOnError(err, "loadCurrentJobs : update intial rows")
 
-	stmt, err := db.Prepare("SELECT o.id, o.obj_sub_type_id, j.status, j.user_id, j.payload FROM obj_job j, obj o WHERE j.obj_id = o.id AND j.is_done = 0 AND j.in_work = 1 AND j.pulled = ? ORDER BY j.priority ASC, j.obj_id ASC;")
+	stmt, err := db.Prepare("SELECT o.id, o.obj_sub_type_id, j.status, j.user_id, j.payload FROM obj_job j, obj o WHERE j.obj_id = o.id AND j.is_done = 0 AND j.in_work = 1 AND j.seq_nr = ? ORDER BY j.priority ASC, j.obj_id ASC;")
 	logOnError(err, "loadCurrentJobs : prepare select statement")
 
-	rows, err := stmt.Query(t)
+	rows, err := stmt.Query(r)
 	//	rows, err := stmt.Query(time.Now())
 	logOnError(err, "loadCurrentJobs : query select statement")
 

main.go

@@ -8,6 +8,7 @@ import (
 	"gopkg.in/gcfg.v1"
 	tb "gopkg.in/tucnak/telebot.v2"
 	"log"
+	"math/rand"
 	"time"
 )
 
@@ -44,16 +45,21 @@ var (
 	db *sql.DB
 	b  *tb.Bot
 
-	cfg                 Config
+	cfg Config
+
+	RndSrc *rand.Rand
+	RndMu  sync.Mutex
+
 	MQCWMsgQueue        chan ChatWarsMessage
 	SQLMsgIdentifyQueue chan int64
 	TGCmdQueue          chan TGCommand
 	MQTGCmdQueue        chan TGCommand
 	JobQueue            chan Job
-	msgParsingRules     map[int]MessageParsingRule
-	clientsKeepAlive    map[int64]*MQKeepAlive
-	clientsQueue        map[int64]*MQClient
-	clientsCW           map[int64]*ChatWarsClient
+
+	msgParsingRules  map[int]MessageParsingRule
+	clientsKeepAlive map[int64]*MQKeepAlive
+	clientsQueue     map[int64]*MQClient
+	clientsCW        map[int64]*ChatWarsClient
 )
 
 func PrintText(m *tb.Message) {
@@ -67,6 +73,9 @@ func main() {
 	// Parsing config
 	flag.Parse()
 
+	// randomize
+	RndSrc = rand.New(rand.NewSource(time.Now()))
+
 	err := gcfg.ReadFileInto(&cfg, *config)
 	failOnError(err, "Parsing config")
 

sql.go

@@ -308,6 +308,7 @@ func initDB() {
 							,schedule		DATETIME NOT NULL
 							,is_done		TINYINT NOT NULL
 							,in_work		TINYINT	NOT NULL
+							,seq_nr         BIGINT UNSIGNED
 							,inserted		TIMESTAMP
 							,pulled			TIMESTAMP
 							,started		TIMESTAMP

utils.go

@@ -77,3 +77,10 @@ func fromChatWarsDate(d string) (t time.Time, err error) {
 func toChatWarsDate(t time.Time) (s string, err error) {
 	return "test", nil
 }
+
+func RndInt64() int64 {
+	RndMu.Lock()
+	i := RndSrc.Uint64()
+	RndMu.Unlock()
+	return i
+}

workers.go

@@ -293,10 +293,10 @@ func MQTGCmdWorker(id int, cmds <-chan TGCommand) {
 			logOnError(err, "MQTGCmdWorker["+strconv.Itoa(id)+"] : Marshal(c)")
 			log.Printf("MQTGCmdWorker["+strconv.Itoa(id)+"] : new command.\n%s\n", string(j))
 			err = clientsQueue[c.FromUserID64].Channel.Publish(
-				"", // exchange
+				"",                                      // exchange
 				clientsQueue[c.FromUserID64].Queue.Name, // routing key
-				false, // mandatory
-				false, // immediate
+				false,                                   // mandatory
+				false,                                   // immediate
 				amqp.Publishing{
 					ContentType: "application/json",
 					Body:        []byte(j),