forked from rexray/rexray
/
registry.go
253 lines (211 loc) · 5.96 KB
/
registry.go
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// Package registry is the central hub for Drivers and other types that
// follow the init-time registration.
package registry
import (
"fmt"
"strings"
"sync"
gofig "github.com/akutz/gofig/types"
"github.com/rexray/rexray/libstorage/api/types"
)
var (
storExecsCtors = map[string]types.NewStorageExecutor{}
storExecsCtorsRWL = &sync.RWMutex{}
storDriverCtors = map[string]types.NewStorageDriver{}
storDriverCtorsRWL = &sync.RWMutex{}
osDriverCtors = map[string]types.NewOSDriver{}
osDriverCtorsRWL = &sync.RWMutex{}
intDriverCtors = map[string]types.NewIntegrationDriver{}
intDriverCtorsRWL = &sync.RWMutex{}
cfgRegs = []*cregW{}
cfgRegsRWL = &sync.RWMutex{}
routers = []types.Router{}
routersRWL = &sync.RWMutex{}
)
type cregW struct {
name string
creg types.NewConfigReg
}
// RegisterConfigReg registers a new configuration registration request.
func RegisterConfigReg(name string, f types.NewConfigReg) {
cfgRegsRWL.Lock()
defer cfgRegsRWL.Unlock()
cfgRegs = append(cfgRegs, &cregW{name, f})
}
// RegisterRouter registers a Router.
func RegisterRouter(router types.Router) {
routersRWL.Lock()
defer routersRWL.Unlock()
routers = append(routers, router)
}
// RegisterStorageExecutor registers a StorageExecutor.
func RegisterStorageExecutor(name string, ctor types.NewStorageExecutor) {
storExecsCtorsRWL.Lock()
defer storExecsCtorsRWL.Unlock()
storExecsCtors[strings.ToLower(name)] = ctor
}
// RegisterStorageDriver registers a StorageDriver.
func RegisterStorageDriver(
name string, ctor types.NewStorageDriver) {
storDriverCtorsRWL.Lock()
defer storDriverCtorsRWL.Unlock()
storDriverCtors[strings.ToLower(name)] = ctor
}
// RegisterOSDriver registers a OSDriver.
func RegisterOSDriver(name string, ctor types.NewOSDriver) {
osDriverCtorsRWL.Lock()
defer osDriverCtorsRWL.Unlock()
osDriverCtors[strings.ToLower(name)] = ctor
}
// RegisterIntegrationDriver registers a IntegrationDriver.
func RegisterIntegrationDriver(name string, ctor types.NewIntegrationDriver) {
intDriverCtorsRWL.Lock()
defer intDriverCtorsRWL.Unlock()
intDriverCtors[strings.ToLower(name)] = ctor
}
// NewStorageExecutor returns a new instance of the executor specified by the
// executor name.
func NewStorageExecutor(name string) (types.StorageExecutor, error) {
var ok bool
var ctor types.NewStorageExecutor
func() {
storExecsCtorsRWL.RLock()
defer storExecsCtorsRWL.RUnlock()
ctor, ok = storExecsCtors[strings.ToLower(name)]
}()
if !ok {
return nil, fmt.Errorf("invalid executor name: %s", name)
}
return ctor(), nil
}
// NewStorageDriver returns a new instance of the driver specified by the
// driver name.
func NewStorageDriver(name string) (types.StorageDriver, error) {
var ok bool
var ctor types.NewStorageDriver
func() {
storDriverCtorsRWL.RLock()
defer storDriverCtorsRWL.RUnlock()
ctor, ok = storDriverCtors[strings.ToLower(name)]
}()
if !ok {
return nil, fmt.Errorf("invalid driver name: %s", name)
}
return ctor(), nil
}
// NewOSDriver returns a new instance of the driver specified by the
// driver name.
func NewOSDriver(name string) (types.OSDriver, error) {
var ok bool
var ctor types.NewOSDriver
func() {
osDriverCtorsRWL.RLock()
defer osDriverCtorsRWL.RUnlock()
ctor, ok = osDriverCtors[strings.ToLower(name)]
}()
if !ok {
return nil, fmt.Errorf("invalid driver name: %s", name)
}
return NewOSDriverManager(ctor()), nil
}
// NewIntegrationDriver returns a new instance of the driver specified by the
// driver name.
func NewIntegrationDriver(name string) (types.IntegrationDriver, error) {
var ok bool
var ctor types.NewIntegrationDriver
func() {
intDriverCtorsRWL.RLock()
defer intDriverCtorsRWL.RUnlock()
ctor, ok = intDriverCtors[strings.ToLower(name)]
}()
if !ok {
return nil, fmt.Errorf("invalid driver name: %s", name)
}
return NewIntegrationDriverManager(ctor()), nil
}
// ConfigRegs returns a channel on which all registered configuration
// registrations are returned.
func ConfigRegs(ctx types.Context) <-chan gofig.ConfigRegistration {
c := make(chan gofig.ConfigRegistration)
go func() {
cfgRegsRWL.RLock()
defer cfgRegsRWL.RUnlock()
for _, cr := range cfgRegs {
r := NewConfigReg(cr.name)
cr.creg(ctx, r)
c <- r
}
close(c)
}()
return c
}
// StorageExecutors returns a channel on which new instances of all registered
// storage executors can be received.
func StorageExecutors() <-chan types.StorageExecutor {
c := make(chan types.StorageExecutor)
go func() {
storExecsCtorsRWL.RLock()
defer storExecsCtorsRWL.RUnlock()
for _, ctor := range storExecsCtors {
c <- ctor()
}
close(c)
}()
return c
}
// StorageDrivers returns a channel on which new instances of all
// registered remote storage drivers can be received.
func StorageDrivers() <-chan types.StorageDriver {
c := make(chan types.StorageDriver)
go func() {
storDriverCtorsRWL.RLock()
defer storDriverCtorsRWL.RUnlock()
for _, ctor := range storDriverCtors {
c <- ctor()
}
close(c)
}()
return c
}
// OSDrivers returns a channel on which new instances of all registered
// OS drivers can be received.
func OSDrivers() <-chan types.OSDriver {
c := make(chan types.OSDriver)
go func() {
osDriverCtorsRWL.RLock()
defer osDriverCtorsRWL.RUnlock()
for _, ctor := range osDriverCtors {
c <- ctor()
}
close(c)
}()
return c
}
// IntegrationDrivers returns a channel on which new instances of all registered
// integration drivers can be received.
func IntegrationDrivers() <-chan types.IntegrationDriver {
c := make(chan types.IntegrationDriver)
go func() {
intDriverCtorsRWL.RLock()
defer intDriverCtorsRWL.RUnlock()
for _, ctor := range intDriverCtors {
c <- ctor()
}
close(c)
}()
return c
}
// Routers returns a channel on which new instances of all registered routers
// can be received.
func Routers() <-chan types.Router {
c := make(chan types.Router)
go func() {
routersRWL.RLock()
defer routersRWL.RUnlock()
for _, r := range routers {
c <- r
}
close(c)
}()
return c
}