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crons.go
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crons.go
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package postgresql
import (
"database/sql"
"errors"
"time"
"github.com/colonyos/colonies/pkg/core"
)
func (db *PQDatabase) AddCron(cron *core.Cron) error {
existingCron, err := db.GetCronByName(cron.ColonyName, cron.Name)
if err != nil {
return err
}
if existingCron != nil {
return errors.New("Cron with name <" + cron.Name + "> in Colony <" + cron.ColonyName + "> already exists")
}
sqlStatement := `INSERT INTO ` + db.dbPrefix + `CRONS (CRON_ID, COLONY_NAME, NAME, CRON_EXPR, INTERVAL, RANDOM, NEXT_RUN, LAST_RUN, WORKFLOW_SPEC, PREV_PROCESSGRAPH_ID, WAIT_FOR_PREV_PROCESSGRAPH, INITIATOR_ID, INITIATOR_NAME) VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13)`
_, err = db.postgresql.Exec(sqlStatement, cron.ID, cron.ColonyName, cron.Name, cron.CronExpression, cron.Interval, cron.Random, cron.NextRun, cron.LastRun, cron.WorkflowSpec, cron.PrevProcessGraphID, cron.WaitForPrevProcessGraph, cron.InitiatorID, cron.InitiatorName)
if err != nil {
return err
}
return nil
}
func (db *PQDatabase) UpdateCron(cronID string, nextRun time.Time, lastRun time.Time, lastProcessGraphID string) error {
sqlStatement := `UPDATE ` + db.dbPrefix + `CRONS SET NEXT_RUN=$1, LAST_RUN=$2, PREV_PROCESSGRAPH_ID=$3 WHERE CRON_ID=$4`
_, err := db.postgresql.Exec(sqlStatement, nextRun, lastRun, lastProcessGraphID, cronID)
if err != nil {
return err
}
return nil
}
func (db *PQDatabase) parseCrons(rows *sql.Rows) ([]*core.Cron, error) {
var crons []*core.Cron
for rows.Next() {
var cronID string
var colonyName string
var name string
var cronExpr string
var interval int
var random bool
var nextRun time.Time
var lastRun time.Time
var workflowSpec string
var prevProcessGraphID string
var waitForPrevProcessGraph bool
var initiatorID string
var initiatorName string
if err := rows.Scan(&cronID, &colonyName, &name, &cronExpr, &interval, &random, &nextRun, &lastRun, &workflowSpec, &prevProcessGraphID, &waitForPrevProcessGraph, &initiatorID, &initiatorName); err != nil {
return nil, err
}
cron := &core.Cron{ID: cronID, ColonyName: colonyName, Name: name, CronExpression: cronExpr, Interval: interval, Random: random, NextRun: nextRun, LastRun: lastRun, WorkflowSpec: workflowSpec, PrevProcessGraphID: prevProcessGraphID, WaitForPrevProcessGraph: waitForPrevProcessGraph}
cron.InitiatorID = initiatorID
cron.InitiatorName = initiatorName
crons = append(crons, cron)
}
return crons, nil
}
func (db *PQDatabase) GetCronByID(cronID string) (*core.Cron, error) {
sqlStatement := `SELECT * FROM ` + db.dbPrefix + `CRONS WHERE CRON_ID=$1`
rows, err := db.postgresql.Query(sqlStatement, cronID)
if err != nil {
return nil, err
}
defer rows.Close()
crons, err := db.parseCrons(rows)
if err != nil {
return nil, err
}
if len(crons) == 0 {
return nil, nil
}
return crons[0], nil
}
func (db *PQDatabase) GetCronByName(colonyName string, cronName string) (*core.Cron, error) {
sqlStatement := `SELECT * FROM ` + db.dbPrefix + `CRONS WHERE COLONY_NAME=$1 AND NAME=$2`
rows, err := db.postgresql.Query(sqlStatement, colonyName, cronName)
if err != nil {
return nil, err
}
defer rows.Close()
crons, err := db.parseCrons(rows)
if err != nil {
return nil, err
}
if len(crons) == 0 {
return nil, nil
}
return crons[0], nil
}
func (db *PQDatabase) FindCronsByColonyName(colonyName string, count int) ([]*core.Cron, error) {
sqlStatement := `SELECT * FROM ` + db.dbPrefix + `CRONS WHERE COLONY_NAME=$1 LIMIT $2`
rows, err := db.postgresql.Query(sqlStatement, colonyName, count)
if err != nil {
return nil, err
}
defer rows.Close()
crons, err := db.parseCrons(rows)
if err != nil {
return nil, err
}
return crons, nil
}
func (db *PQDatabase) FindAllCrons() ([]*core.Cron, error) {
sqlStatement := `SELECT * FROM ` + db.dbPrefix + `CRONS`
rows, err := db.postgresql.Query(sqlStatement)
if err != nil {
return nil, err
}
defer rows.Close()
crons, err := db.parseCrons(rows)
if err != nil {
return nil, err
}
return crons, nil
}
func (db *PQDatabase) RemoveCronByID(cronID string) error {
sqlStatement := `DELETE FROM ` + db.dbPrefix + `CRONS WHERE CRON_ID=$1`
_, err := db.postgresql.Exec(sqlStatement, cronID)
if err != nil {
return err
}
return nil
}
func (db *PQDatabase) RemoveAllCronsByColonyName(colonyName string) error {
sqlStatement := `DELETE FROM ` + db.dbPrefix + `CRONS WHERE COLONY_NAME=$1`
_, err := db.postgresql.Exec(sqlStatement, colonyName)
if err != nil {
return err
}
return nil
}