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࠶ߟ ΞΫλʔϞσϧ
٢ࣉ.pm36
yuuki takezawa / ytake
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Pro
fi
le
• ᖒ ༗و a.k.a ytake
• ઍגࣜձࣾ CTO / ΄͔ٕज़ސʢωοτϓϩςΫγϣϯζͳͲʣ
• Go / Scala / Kotlin
• ΞΫλʔϞσϧେ͖
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ΞΫλʔϞσϧͬͯʁ
• 1973ʹൃද͞ΕͨฒߦܭࢉͷֶతϞσϧͷҰछ
• ৽͍͠ͷͰ͋Γ·ͤΜ
• ErlangScalaͳͲͰ͓ͳ͡Έ
• ϝϞϦڞ༗ΛߦΘͣɺϊϯϒϩοΩϯάͰ
ಠཱͨ͠ΞΫλʔ͕ঢ়ଶΛ࣋ͭ
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ΞΫλʔͷ
• ΞΫλʔͷϝοηʔδΛૹ৴͢Δ
• ΞΫλʔΛੜ͢Δ
• ϝοηʔδʹద༻͢Δಈ࡞Λߦ͏
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No content
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ΞΫλʔϞσϧͬͯʁ
• ΞΫλʔಠཱͯ͠ಈ࡞͠ɺͦΕͧΕ͕ϥΠϑαΠΫϧΛ࣋ͭ
• ϝϞϦͷڞ༗ͳͲҰߦΘͳ͍
• ΞΫλʔΛૢ࡞͢Δ͜ͱෆՄೳͰΠϛϡʔλϒϧ
• ϝοηʔδͷΈͰΓऔΓΛߦ͏
• Ґஔಁաੑ
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ग़య https://petabridge.com/blog/akkadotnet-what-is-an-actor/
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Ґஔಁաੑ
• ΞΫλʔϩʔΧϧϦϞʔτɺΫϥελͰಈ࡞Ͱ͖Δ
• Ͳ͜ʹ͋Δͷ͔ɺͲͷΑ͏ʹͯ͠ݺͼग़͢ͷ͔
ίʔυ্Ͱ۠ผ͢Δ͜ͱ͕ͳ͘ͳΔ
• ڥք͚ͮΒΕͨίϯςΩετΛجʹׂ͢Δ͜ͱɺ
εϧʔϓοτ্ͷͨΊׂ͢Δ͜ͱ͕༰қ
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ग़య https://pekko.apache.org/docs/pekko/current/general/addressing.html
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ग़య https://pekko.apache.org/docs/pekko/current/general/addressing.html
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֊ߏΛͭ
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ϑΥʔϧττϨϥϯε
• ώΤϥϧΩʔΛ࣋ͭͱ͍͏͜ͱ
ΞΫλʔ͕ࢠΞΫλʔΛಜɾཧ͢ΔΛ࣋ͭ
ࣄʹࣦഊͨ͠߹ʹͲͷΑ͏ͳઓུΛʁʢεʔύʔόΠβઓུʣ
• ࢠؔʹͳ͍ΞΫλʔࢹ͢Δ͜ͱ͕Ͱ͖Δ
• ࣦഊ࣌ʹͲͷΑ͏ʹ෮چͤ͞Δ͔ΛࢦࣔͰ͖Δ
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ࢹྫ
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func (state *parentActor) Receive(context actor.Context) {
switch msg := context.Message().(type) {
case *hello:
props := actor.PropsFromProducer(newChildActor)
child := context.Spawn(props)
context.Send(child, msg)
case *actor.Terminated:
fmt.Println("child terminated", msg.Who)
}
}
func newParentActor() actor.Actor {
return &parentActor{}
}
type childActor struct{}
func (state *childActor) Receive(context actor.Context) {
switch msg := context.Message().(type) {
case *actor.Restarting:
fmt.Println("restarting")
case *hello:
fmt.Printf("Hello %v\n", msg.Who)
context.Stop(context.Self())
}
}
func newChildActor() actor.Actor {
return &childActor{}
}
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func (state *parentActor) Receive(context actor.Context) {
switch msg := context.Message().(type) {
case *hello:
props := actor.PropsFromProducer(newChildActor)
child := context.Spawn(props)
context.Send(child, msg)
case *actor.Terminated:
fmt.Println("child terminated", msg.Who)
}
}
func newParentActor() actor.Actor {
return &parentActor{}
}
type childActor struct{}
func (state *childActor) Receive(context actor.Context) {
switch msg := context.Message().(type) {
case *actor.Restarting:
fmt.Println("restarting")
case *hello:
fmt.Printf("Hello %v\n", msg.Who)
context.Stop(context.Self())
}
}
func newChildActor() actor.Actor {
return &childActor{}
}
ΞΫλʔ
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func (state *parentActor) Receive(context actor.Context) {
switch msg := context.Message().(type) {
case *hello:
props := actor.PropsFromProducer(newChildActor)
child := context.Spawn(props)
context.Send(child, msg)
case *actor.Terminated:
fmt.Println("child terminated", msg.Who)
}
}
func newParentActor() actor.Actor {
return &parentActor{}
}
type childActor struct{}
func (state *childActor) Receive(context actor.Context) {
switch msg := context.Message().(type) {
case *actor.Restarting:
fmt.Println("restarting")
case *hello:
fmt.Printf("Hello %v\n", msg.Who)
context.Stop(context.Self())
}
}
func newChildActor() actor.Actor {
return &childActor{}
}
ࢠΞΫλʔ
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func (state *parentActor) Receive(context actor.Context) {
switch msg := context.Message().(type) {
case *hello:
props := actor.PropsFromProducer(newChildActor)
child := context.Spawn(props)
context.Send(child, msg)
case *actor.Terminated:
fmt.Println("child terminated", msg.Who)
}
}
func newParentActor() actor.Actor {
return &parentActor{}
}
type childActor struct{}
func (state *childActor) Receive(context actor.Context) {
switch msg := context.Message().(type) {
case *actor.Restarting:
fmt.Println("restarting")
case *hello:
fmt.Printf("Hello %v\n", msg.Who)
context.Stop(context.Self())
}
}
func newChildActor() actor.Actor {
return &childActor{}
}
ࢠΞΫλʔੜ
ࣗಈతʹ֊ߏΛ࣋ͭ
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func (state *parentActor) Receive(context actor.Context) {
switch msg := context.Message().(type) {
case *hello:
props := actor.PropsFromProducer(newChildActor)
child := context.Spawn(props)
context.Send(child, msg)
case *actor.Terminated:
fmt.Println("child terminated", msg.Who)
}
}
func newParentActor() actor.Actor {
return &parentActor{}
}
type childActor struct{}
func (state *childActor) Receive(context actor.Context) {
switch msg := context.Message().(type) {
case *actor.Restarting:
fmt.Println("restarting")
case *hello:
fmt.Printf("Hello %v\n", msg.Who)
context.Stop(context.Self())
}
}
func newChildActor() actor.Actor {
return &childActor{}
}
ࢠΞΫλʔͷΞυϨε
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func (state *parentActor) Receive(context actor.Context) {
switch msg := context.Message().(type) {
case *hello:
props := actor.PropsFromProducer(newChildActor)
child := context.Spawn(props)
context.Send(child, msg)
case *actor.Terminated:
fmt.Println("child terminated", msg.Who)
}
}
func newParentActor() actor.Actor {
return &parentActor{}
}
type childActor struct{}
func (state *childActor) Receive(context actor.Context) {
switch msg := context.Message().(type) {
case *actor.Restarting:
fmt.Println("restarting")
case *hello:
fmt.Printf("Hello %v\n", msg.Who)
context.Stop(context.Self())
}
}
func newChildActor() actor.Actor {
return &childActor{}
}
ࢠΞΫλʔ͕ࣗѼͯͷϝοηʔδΛ
ड͚औΔ
ʢࣗಈͰৼΓ͚ΒΕ·͢ʣ
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func (state *parentActor) Receive(context actor.Context) {
switch msg := context.Message().(type) {
case *hello:
props := actor.PropsFromProducer(newChildActor)
child := context.Spawn(props)
context.Send(child, msg)
case *actor.Terminated:
fmt.Println("child terminated", msg.Who)
}
}
func newParentActor() actor.Actor {
return &parentActor{}
}
type childActor struct{}
func (state *childActor) Receive(context actor.Context) {
switch msg := context.Message().(type) {
case *actor.Restarting:
fmt.Println("restarting")
case *hello:
fmt.Printf("Hello %v\n", msg.Who)
context.Stop(context.Self())
}
}
func newChildActor() actor.Actor {
return &childActor{}
}
ࢠΞΫλʔ͕ࣗࣗΛఀࢭͨ͠ྫ
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func (state *parentActor) Receive(context actor.Context) {
switch msg := context.Message().(type) {
case *hello:
props := actor.PropsFromProducer(newChildActor)
child := context.Spawn(props)
context.Send(child, msg)
case *actor.Terminated:
fmt.Println("child terminated", msg.Who)
}
}
func newParentActor() actor.Actor {
return &parentActor{}
}
type childActor struct{}
func (state *childActor) Receive(context actor.Context) {
switch msg := context.Message().(type) {
case *actor.Restarting:
fmt.Println("restarting")
case *hello:
fmt.Printf("Hello %v\n", msg.Who)
context.Stop(context.Self())
}
}
func newChildActor() actor.Actor {
return &childActor{}
}
ΞΫλʔఀࢭ͕௨͞ΕΔ
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ઓུ
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decider := func(reason interface{}) actor.Directive {
fmt.Println("handling failure for child")
return actor.StopDirective
}
supervisor := actor.NewOneForOneStrategy(10, time.Nanosecond, decider)
rootContext := system.Root
pid := rootContext.Spawn(
actor.PropsFromProducer(newParentActor,
actor.WithSupervisor(supervisor)))
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decider := func(reason interface{}) actor.Directive {
fmt.Println("handling failure for child")
return actor.StopDirective
}
supervisor := actor.NewOneForOneStrategy(10, time.Nanosecond, decider)
rootContext := system.Root
pid := rootContext.Spawn(
actor.PropsFromProducer(newParentActor,
actor.WithSupervisor(supervisor)))
ࢠΞΫλʔ͕ࣦഊͨ͠߹ɺ
ಉ֊ʹ͍ΔࢠΞΫλʔͷ͏ͪɺ
ରͷͷ͚ͩఀࢭͤ͞Δྫ
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ଞɺঢ়ଶมԽϧʔςΟϯάͳͲ
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ैདྷͷΈʹͲ͏׆͔ͤΒΕΔ͔ʁ
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ΞΫλʔͱ౷తͳߏ
• ΞΫλʔϞσϧͱैདྷͷΞϓϦέʔγϣϯߏڞଘՄೳ
• ઓज़ύλʔϯͳͲͰ
ΞΫλʔ͕ΤϯςΟςΟʹͳΓঢ়ଶΛͭ
• ΞΫλʔͷঢ়ଶมԽʢΠϕϯτʣΛอଘ͢Δ͜ͱͰ
ϏϡʔΛΈཱͯΔ͜ͱ͕Ͱ͖ΔʢRead Model Updateʣ
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ֶߍͷςετྫ
• ઌੜ͕ੜెʹରͯ͠ ͞Μ͢͏ͷςετΛ࣮ࢪ
• ੜెͦΕͧΕݸͱͯ͠Λղ͘
• ઌੜςετதʹݟकΔͳͲͷߦಈ
• શͯ͑ͨΒςετ༻ࢴΛఏग़͢Δ
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4UVEFOU"DUPS
4UVEFOU"DUPS
4UVEFOU"DUPS
4UVEFOU"DUPS
4UVEFOU"DUPS
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4UVEFOU"DUPS
4UVEFOU"DUPS
4UVEFOU"DUPS
4UVEFOU"DUPS
4UVEFOU"DUPS
5FBDIFS"DUPS
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4UVEFOU"DUPS 4UVEFOU"DUPS
4UVEFOU"DUPS
5FBDIFS"DUPS
$MBTT3PPN"DUPS
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4UVEFOU"DUPS 4UVEFOU"DUPS
4UVEFOU"DUPS
5FBDIFS"DUPS
$MBTT3PPN"DUPS
ڥք͚ͮΒΕͨίϯςΩετ
ͱݟͳͤΔ͔
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શͯΞΫλʔ
• ઌੜੜెΞΫλʔ
• ΞΫλʔूͱΈͳͤΔ
• ̍֊্͕ΔͱநͳͲ͕มΘΓɺ
ϧʔτ͕มΘΔͱίϯςΩετ͕มΘΔͱߟ͑Δ͜ͱ͕Ͱ͖Δ
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ঢ়ଶมԽ
• ੜెͷঢ়ଶ͕มΘͬͨ
ઌੜ͕ͲͷੜెͷςετΛ͏͚ͱͬͨ ͳͲ
• ΞΫλʔͷঢ়ଶΛอ͢Δ͜ͱͰࣄ࣮Λ͢
• ࣄ࣮ͷੵΈॏͶ͕ϏϡʔΛ࡞Δ
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func (u *Cart) Receive(context actor.Context) {
defer context.Poison(context.Self())
switch msg := context.Message().(type) {
case *persistence.RequestSnapshot:
u.PersistSnapshot(u.state)
case *persistence.ReplayComplete:
// ϦϓϨΠ͕ྃͨ͠Β෦ঢ়ଶΛมߋ͢Δ
context.Logger().Info(
fmt.Sprintf("replay completed, internal state changed to '%v'", u.state))
case *command.AddItem:
if u.IsStateExists(msg.Email) {
context.Send(u.stream, &message.AddItemError{Message: "item already exists"})
return
}
// ུ
u.persistence(context, ev)
// xxxੜΠϕϯτΛΠϕϯτετϦʔϜ
context.Send(u.stream, ev)
case *event.ItemAdded:
if msg.String() != "" {
// event ͕ϦϓϨΠ͞Εͨ߹ঢ়ଶΛߋ৽͢Δ
u.state = msg
u.sendToReadModelUpdater(context, msg)
}
}
}
ίϚϯυΛडऔɺ
ࣗΞΫλʔͷঢ়ଶΛมߋ
ঢ়ଶมߋΛΠϕϯτͱͯ͠ӬଓԽ
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func (u *Cart) Receive(context actor.Context) {
defer context.Poison(context.Self())
switch msg := context.Message().(type) {
case *persistence.RequestSnapshot:
u.PersistSnapshot(u.state)
case *persistence.ReplayComplete:
// ϦϓϨΠ͕ྃͨ͠Β෦ঢ়ଶΛมߋ͢Δ
context.Logger().Info(
fmt.Sprintf("replay completed, internal state changed to '%v'", u.state))
case *command.AddItem:
if u.IsStateExists(msg.Name) {
context.Send(u.stream, &message.AddItemError{Message: "item already exists"})
return
}
// ུ
u.persistence(context, ev)
// xxxੜΠϕϯτΛΠϕϯτετϦʔϜ
context.Send(u.stream, ev)
case *event.ItemAdded:
if msg.String() != "" {
// event ͕ϦϓϨΠ͞Εͨ߹ঢ়ଶΛߋ৽͢Δ
u.state = msg
u.sendToReadModelUpdater(context, msg)
}
}
}
ϦʔυϞσϧߋ৽ϋϯυϥʢΞΫλʔʣ
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func (u *Cart) Receive(context actor.Context) {
defer context.Poison(context.Self())
switch msg := context.Message().(type) {
case *persistence.RequestSnapshot:
u.PersistSnapshot(u.state)
case *persistence.ReplayComplete:
// ϦϓϨΠ͕ྃͨ͠Β෦ঢ়ଶΛมߋ͢Δ
context.Logger().Info(
fmt.Sprintf("replay completed, internal state changed to '%v'", u.state))
case *command.AddItem:
if u.IsStateExists(msg.Name) {
context.Send(u.stream, &message.AddItemError{Message: "item already exists"})
return
}
// ུ
u.persistence(context, ev)
// xxxੜΠϕϯτΛΠϕϯτετϦʔϜ
context.Send(u.stream, ev)
case *event.ItemAdded:
if msg.String() != "" {
// event ͕ϦϓϨΠ͞Εͨ߹ঢ়ଶΛߋ৽͢Δ
u.state = msg
u.sendToReadModelUpdater(context, msg)
}
}
}
ΞΫλʔੜʢ࠶ੜɺϦελʔτͳͲʣ࣌
աڈͷঢ়ଶ͕͋Εɺ
࠷ॳͷΠϕϯτ͔Βड৴͠ɺঢ়ଶΛ෮ݩ
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ಠཱͯ͠ಈ͍͍ͯΔ
• ΫϥυΛར༻͢Δ͜ͱͰγεςϜࢄ
• ࢄ͍ͯ͠ΔͷΛಉظతʹѻ͏ͷͰͳ͘
ඇಉظͰฒߦɺͯ͢ݸͱͯ͠ಈ࡞͍ͯ͠Δͱଊ͑Δͱʁ
• ΞΫλʔϞσϧʹ͍ͭͯ࠶ߟͯ͠ΈΔͷ͍͔͕Ͱ͠ΐ͏͔ʁ
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ಋೖͰ͖ΔπʔϧΩοτ
• Akka / Pekko (Java, Scala)
• Erlang OTP
• Proto Actor (Go, .NET)
• ergo (Go)
• Phluxor(PHP) ΄͔৭ʑ
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ΞΫλʔϞσϧʹ͍ͭͯཧղ͢ΔͨΊʹ
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ΑΓཧղ͢ΔͨΊʹ
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͍͞͝ʹ
• ϓϩάϥϛϯάύϥμΠϜ͕ͪΐͬͱҧ͏ͷ
• ฉ͚ͩ͘Ͱͳ͔ͳ͔͍͠ͷͰɺͥͻ৮ͬͯΈ͍ͯͩ͘͞
• ཧղͰ͖ΔͱීஈͷϓϩάϥϛϯάɺϞσϦϯάʹ׆͔ͤΔʂ