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enforcer.go
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enforcer.go
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package enforcer
import (
"fmt"
"code.cloudfoundry.org/lager"
"github.com/pivotal-cf-experimental/cf-mysql-quota-enforcer/database"
)
type Enforcer interface {
EnforceOnce() error
}
type enforcer struct {
violatorRepo, reformerRepo database.Repo
logger lager.Logger
}
func NewEnforcer(violatorRepo, reformerRepo database.Repo, logger lager.Logger) Enforcer {
return &enforcer{
violatorRepo: violatorRepo,
reformerRepo: reformerRepo,
logger: logger,
}
}
func (e enforcer) EnforceOnce() error {
err := e.revokePrivilegesFromViolators()
if err != nil {
return err
}
err = e.grantPrivilegesToReformed()
if err != nil {
return err
}
return nil
}
func (e enforcer) revokePrivilegesFromViolators() error {
e.logger.Info("Looking for violators")
violators, err := e.violatorRepo.All()
if err != nil {
return fmt.Errorf("Finding violators: %s", err.Error())
}
for _, db := range violators {
err = db.RevokePrivileges()
if err != nil {
return fmt.Errorf("Revoking privileges: %s", err.Error())
}
err = db.KillActiveConnections()
if err != nil {
return fmt.Errorf("Resetting active privileges: %s", err.Error())
}
}
return nil
}
func (e enforcer) grantPrivilegesToReformed() error {
e.logger.Info("Looking for reformers")
reformers, err := e.reformerRepo.All()
if err != nil {
return fmt.Errorf("Finding reformers: %s", err.Error())
}
for _, db := range reformers {
err = db.GrantPrivileges()
if err != nil {
return fmt.Errorf("Granting privileges: %s", err.Error())
}
err = db.KillActiveConnections()
if err != nil {
return fmt.Errorf("Resetting active privileges: %s", err.Error())
}
}
return nil
}