func SetRoutes(routes []core.Route) error {
// in case of failure
oldRoutes, err := database.GetRoutes()
if err != nil {
return err
}
// apply routes to proxymgr
err = proxymgr.SetRoutes(routes)
if err != nil {
return err
}
if !database.CentralStore {
// save to backend
err = database.SetRoutes(routes)
if err != nil {
// undo proxymgr action
if uerr := proxymgr.SetRoutes(oldRoutes); uerr != nil {
err = fmt.Errorf("%v - %v", err.Error(), uerr.Error())
}
return err
}
}
return nil
}
func (n None) SetRoutes(routes []core.Route) error {
err := common.SetRoutes(routes)
if err != nil {
return err
}
if database.CentralStore {
return database.SetRoutes(routes)
}
return nil
}
func TestSetRoutes(t *testing.T) {
routes := []core.Route{testRoute}
if err := database.SetRoutes(routes); err != nil {
t.Errorf("Failed to SET routes - %v", err)
}
routes, err := database.GetRoutes()
if err != nil {
t.Error(err)
}
if len(routes) != 1 {
t.Errorf("Wrong number of routes")
}
}
// SetRoutes tells all members to replace the routes in their database with a new set.
// rolls back on failure
func (r Redis) SetRoutes(routes []core.Route) error {
conn := pool.Get()
defer conn.Close()
oldRoutes, err := common.GetRoutes()
if err != nil {
return err
}
// publishJson to others
err = r.publishJson(conn, "set-routes", routes)
if err != nil {
// if i failed to publishJson, request should fail
return err
}
actionHash := fmt.Sprintf("%x", md5.Sum([]byte(fmt.Sprintf("set-routes %s", routes))))
// ensure all members applied action
err = r.waitForMembers(conn, actionHash)
if err != nil {
uActionHash := fmt.Sprintf("%x", md5.Sum([]byte(fmt.Sprintf("set-routes %s", oldRoutes))))
// cleanup rollback cruft. clear actionHash ensures no mistakes on re-submit
defer conn.Do("DEL", uActionHash, actionHash)
// attempt rollback - no need to waitForMembers here
uerr := r.publishJson(conn, "set-routes", oldRoutes)
if uerr != nil {
err = fmt.Errorf("%v - %v", err, uerr)
}
return err
}
if database.CentralStore {
return database.SetRoutes(routes)
}
return nil
}