Files
tasks/api/persistence/v1/hsm.pb.go
Roey BermanandGitHub c76f4a2caa Hierarchical state machines (#5494)
## Notes for reviewers

I don't consider this a final approach but I do think it's a step in
the right direction, we need to model more state machines on top of this
to form a more solid API.

Note that mutable state itself is registered as a state machine in the HSM framework and used as the root node in the HSM tree.

It's a bit annoying that all of the unit tests need to register the workflow state machine but I think this is ended up being the cleanest approach from the HSM framework perspective.

There's still some follow-up work, like collapsing timer tasks and support for interacting with history event, that I'll take on later.

Replication support for the framework will also come at a later time.


- See discussions in related PRs (#5446, #5495)

## What changed?

- Modified the statemachines abstraction to be a bit more generic
- Rewrote callbacks as a plugin using this framework

## Why?

This centralizes most the callback code in the plugin directory instead
of having it spread out the entire project moving common concerns such
as staleness checks, task generation, and (in the future) replication
into a framework and should generally help speed up feature delivery and
maintainability.

I plan to leverage this framework when implementing Nexus operations.

## How did you test it?

Existing tests from the feature branch and added unit tests.
2024-03-11 12:59:47 -07:00

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// The MIT License
//
// Copyright (c) 2024 Temporal Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
// Code generated by protoc-gen-go. DO NOT EDIT.
// plugins:
// protoc-gen-go
// protoc
// source: temporal/server/api/persistence/v1/hsm.proto
package persistence
import (
reflect "reflect"
sync "sync"
protoreflect "google.golang.org/protobuf/reflect/protoreflect"
protoimpl "google.golang.org/protobuf/runtime/protoimpl"
)
const (
// Verify that this generated code is sufficiently up-to-date.
_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
// Verify that runtime/protoimpl is sufficiently up-to-date.
_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
)
// A node in a hierarchical state machine tree.
type StateMachineNode struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
unknownFields protoimpl.UnknownFields
// Number of transitions on this state machine object.
// Used to verify that a task is not stale if the state machine does not allow concurrent task execution.
TransitionCount int64 `protobuf:"varint,1,opt,name=transition_count,json=transitionCount,proto3" json:"transition_count,omitempty"`
// Seralized data of the underlying state machine.
Data []byte `protobuf:"bytes,2,opt,name=data,proto3" json:"data,omitempty"`
Children map[int32]*StateMachineMap `protobuf:"bytes,3,rep,name=children,proto3" json:"children,omitempty" protobuf_key:"varint,1,opt,name=key,proto3" protobuf_val:"bytes,2,opt,name=value,proto3"`
}
func (x *StateMachineNode) Reset() {
*x = StateMachineNode{}
if protoimpl.UnsafeEnabled {
mi := &file_temporal_server_api_persistence_v1_hsm_proto_msgTypes[0]
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
ms.StoreMessageInfo(mi)
}
}
func (x *StateMachineNode) String() string {
return protoimpl.X.MessageStringOf(x)
}
func (*StateMachineNode) ProtoMessage() {}
func (x *StateMachineNode) ProtoReflect() protoreflect.Message {
mi := &file_temporal_server_api_persistence_v1_hsm_proto_msgTypes[0]
if protoimpl.UnsafeEnabled && x != nil {
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
if ms.LoadMessageInfo() == nil {
ms.StoreMessageInfo(mi)
}
return ms
}
return mi.MessageOf(x)
}
// Deprecated: Use StateMachineNode.ProtoReflect.Descriptor instead.
func (*StateMachineNode) Descriptor() ([]byte, []int) {
return file_temporal_server_api_persistence_v1_hsm_proto_rawDescGZIP(), []int{0}
}
func (x *StateMachineNode) GetTransitionCount() int64 {
if x != nil {
return x.TransitionCount
}
return 0
}
func (x *StateMachineNode) GetData() []byte {
if x != nil {
return x.Data
}
return nil
}
func (x *StateMachineNode) GetChildren() map[int32]*StateMachineMap {
if x != nil {
return x.Children
}
return nil
}
// Map of state machine ID to StateMachineNode.
type StateMachineMap struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
unknownFields protoimpl.UnknownFields
// (-- api-linter: core::0140::prepositions=disabled
//
// aip.dev/not-precedent: "by" is used to clarify the keys and values. --)
MachinesById map[string]*StateMachineNode `protobuf:"bytes,1,rep,name=machines_by_id,json=machinesById,proto3" json:"machines_by_id,omitempty" protobuf_key:"bytes,1,opt,name=key,proto3" protobuf_val:"bytes,2,opt,name=value,proto3"`
}
func (x *StateMachineMap) Reset() {
*x = StateMachineMap{}
if protoimpl.UnsafeEnabled {
mi := &file_temporal_server_api_persistence_v1_hsm_proto_msgTypes[1]
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
ms.StoreMessageInfo(mi)
}
}
func (x *StateMachineMap) String() string {
return protoimpl.X.MessageStringOf(x)
}
func (*StateMachineMap) ProtoMessage() {}
func (x *StateMachineMap) ProtoReflect() protoreflect.Message {
mi := &file_temporal_server_api_persistence_v1_hsm_proto_msgTypes[1]
if protoimpl.UnsafeEnabled && x != nil {
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
if ms.LoadMessageInfo() == nil {
ms.StoreMessageInfo(mi)
}
return ms
}
return mi.MessageOf(x)
}
// Deprecated: Use StateMachineMap.ProtoReflect.Descriptor instead.
func (*StateMachineMap) Descriptor() ([]byte, []int) {
return file_temporal_server_api_persistence_v1_hsm_proto_rawDescGZIP(), []int{1}
}
func (x *StateMachineMap) GetMachinesById() map[string]*StateMachineNode {
if x != nil {
return x.MachinesById
}
return nil
}
type StateMachineKey struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
unknownFields protoimpl.UnknownFields
// Addressable type of the corresponding state machine in a single tree level.
Type int32 `protobuf:"varint,1,opt,name=type,proto3" json:"type,omitempty"`
// Addressable ID of the corresponding state machine in a single tree level.
Id string `protobuf:"bytes,2,opt,name=id,proto3" json:"id,omitempty"`
}
func (x *StateMachineKey) Reset() {
*x = StateMachineKey{}
if protoimpl.UnsafeEnabled {
mi := &file_temporal_server_api_persistence_v1_hsm_proto_msgTypes[2]
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
ms.StoreMessageInfo(mi)
}
}
func (x *StateMachineKey) String() string {
return protoimpl.X.MessageStringOf(x)
}
func (*StateMachineKey) ProtoMessage() {}
func (x *StateMachineKey) ProtoReflect() protoreflect.Message {
mi := &file_temporal_server_api_persistence_v1_hsm_proto_msgTypes[2]
if protoimpl.UnsafeEnabled && x != nil {
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
if ms.LoadMessageInfo() == nil {
ms.StoreMessageInfo(mi)
}
return ms
}
return mi.MessageOf(x)
}
// Deprecated: Use StateMachineKey.ProtoReflect.Descriptor instead.
func (*StateMachineKey) Descriptor() ([]byte, []int) {
return file_temporal_server_api_persistence_v1_hsm_proto_rawDescGZIP(), []int{2}
}
func (x *StateMachineKey) GetType() int32 {
if x != nil {
return x.Type
}
return 0
}
func (x *StateMachineKey) GetId() string {
if x != nil {
return x.Id
}
return ""
}
// A reference to a state machine at a point in time.
type StateMachineRef struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
unknownFields protoimpl.UnknownFields
// Nested path to a state machine.
Path []*StateMachineKey `protobuf:"bytes,1,rep,name=path,proto3" json:"path,omitempty"`
// Namespace failover version on the corresponding mutable state object, used for staleness detection when global
// namespaces are enabled.
MutableStateNamespaceFailoverVersion int64 `protobuf:"varint,2,opt,name=mutable_state_namespace_failover_version,json=mutableStateNamespaceFailoverVersion,proto3" json:"mutable_state_namespace_failover_version,omitempty"`
// Number of transitions on the corresponding mutable state object. Used to verify that a task is not referencing a
// stale state or, in some situations, that the task itself is not stale.
MutableStateTransitionCount int64 `protobuf:"varint,3,opt,name=mutable_state_transition_count,json=mutableStateTransitionCount,proto3" json:"mutable_state_transition_count,omitempty"`
// Number of transitions executed on the referenced state machine node at the time this Ref is instantiated.
// If non-zero, the state machine is assumed to support only non-concurrent tasks, and this number should match the
// number of state transitions on the corresponding state machine object.
MachineTransitionCount int64 `protobuf:"varint,4,opt,name=machine_transition_count,json=machineTransitionCount,proto3" json:"machine_transition_count,omitempty"`
}
func (x *StateMachineRef) Reset() {
*x = StateMachineRef{}
if protoimpl.UnsafeEnabled {
mi := &file_temporal_server_api_persistence_v1_hsm_proto_msgTypes[3]
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
ms.StoreMessageInfo(mi)
}
}
func (x *StateMachineRef) String() string {
return protoimpl.X.MessageStringOf(x)
}
func (*StateMachineRef) ProtoMessage() {}
func (x *StateMachineRef) ProtoReflect() protoreflect.Message {
mi := &file_temporal_server_api_persistence_v1_hsm_proto_msgTypes[3]
if protoimpl.UnsafeEnabled && x != nil {
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
if ms.LoadMessageInfo() == nil {
ms.StoreMessageInfo(mi)
}
return ms
}
return mi.MessageOf(x)
}
// Deprecated: Use StateMachineRef.ProtoReflect.Descriptor instead.
func (*StateMachineRef) Descriptor() ([]byte, []int) {
return file_temporal_server_api_persistence_v1_hsm_proto_rawDescGZIP(), []int{3}
}
func (x *StateMachineRef) GetPath() []*StateMachineKey {
if x != nil {
return x.Path
}
return nil
}
func (x *StateMachineRef) GetMutableStateNamespaceFailoverVersion() int64 {
if x != nil {
return x.MutableStateNamespaceFailoverVersion
}
return 0
}
func (x *StateMachineRef) GetMutableStateTransitionCount() int64 {
if x != nil {
return x.MutableStateTransitionCount
}
return 0
}
func (x *StateMachineRef) GetMachineTransitionCount() int64 {
if x != nil {
return x.MachineTransitionCount
}
return 0
}
type StateMachineTaskInfo struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
unknownFields protoimpl.UnknownFields
// Reference to a state machine.
Ref *StateMachineRef `protobuf:"bytes,1,opt,name=ref,proto3" json:"ref,omitempty"`
// Task type. Not to be confused with the state machine's type in the `ref` field.
Type int32 `protobuf:"varint,2,opt,name=type,proto3" json:"type,omitempty"`
// Opaque data attached to this task. May be nil. Deserialized by a registered TaskSerializer for this type.
Data []byte `protobuf:"bytes,3,opt,name=data,proto3" json:"data,omitempty"`
}
func (x *StateMachineTaskInfo) Reset() {
*x = StateMachineTaskInfo{}
if protoimpl.UnsafeEnabled {
mi := &file_temporal_server_api_persistence_v1_hsm_proto_msgTypes[4]
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
ms.StoreMessageInfo(mi)
}
}
func (x *StateMachineTaskInfo) String() string {
return protoimpl.X.MessageStringOf(x)
}
func (*StateMachineTaskInfo) ProtoMessage() {}
func (x *StateMachineTaskInfo) ProtoReflect() protoreflect.Message {
mi := &file_temporal_server_api_persistence_v1_hsm_proto_msgTypes[4]
if protoimpl.UnsafeEnabled && x != nil {
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
if ms.LoadMessageInfo() == nil {
ms.StoreMessageInfo(mi)
}
return ms
}
return mi.MessageOf(x)
}
// Deprecated: Use StateMachineTaskInfo.ProtoReflect.Descriptor instead.
func (*StateMachineTaskInfo) Descriptor() ([]byte, []int) {
return file_temporal_server_api_persistence_v1_hsm_proto_rawDescGZIP(), []int{4}
}
func (x *StateMachineTaskInfo) GetRef() *StateMachineRef {
if x != nil {
return x.Ref
}
return nil
}
func (x *StateMachineTaskInfo) GetType() int32 {
if x != nil {
return x.Type
}
return 0
}
func (x *StateMachineTaskInfo) GetData() []byte {
if x != nil {
return x.Data
}
return nil
}
// Keeps track of the ranges of transition counts per namespace failover version.
// Each task generated by the HSM framework is imprinted with the current transaction’s `NamespaceFailoverVersion` and
// `MaxTransitionCount` at the end of the transaction.
// When a task is being processed, the `StateTransitionHistory` is compared with the imprinted task information to
// verify that a task is not referencing a stale state or that the task itself is not stale.
// For example, if the state has a history of `[{v: 1, t: 3}, {v: 2, t: 5}]`, task A `{v: 2, t: 4}` **is not**
// referencing stale state because for version `2` transitions `4-5` are valid, while task B `{v: 2, t: 6}` **is**
// referencing stale state because the transition count is out of range for version `2`.
// Furthermore, task C `{v: 1, t: 4}` itself is stale because it is referencing an impossible state, likely due to post
// split-brain reconciliation.
type VersionedTransition struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
unknownFields protoimpl.UnknownFields
// The namespace failover version at transition time.
NamespaceFailoverVersion int64 `protobuf:"varint,1,opt,name=namespace_failover_version,json=namespaceFailoverVersion,proto3" json:"namespace_failover_version,omitempty"`
// Maximum state transition count perceived during the specified namespace_failover_version.
MaxTransitionCount int64 `protobuf:"varint,2,opt,name=max_transition_count,json=maxTransitionCount,proto3" json:"max_transition_count,omitempty"`
}
func (x *VersionedTransition) Reset() {
*x = VersionedTransition{}
if protoimpl.UnsafeEnabled {
mi := &file_temporal_server_api_persistence_v1_hsm_proto_msgTypes[5]
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
ms.StoreMessageInfo(mi)
}
}
func (x *VersionedTransition) String() string {
return protoimpl.X.MessageStringOf(x)
}
func (*VersionedTransition) ProtoMessage() {}
func (x *VersionedTransition) ProtoReflect() protoreflect.Message {
mi := &file_temporal_server_api_persistence_v1_hsm_proto_msgTypes[5]
if protoimpl.UnsafeEnabled && x != nil {
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
if ms.LoadMessageInfo() == nil {
ms.StoreMessageInfo(mi)
}
return ms
}
return mi.MessageOf(x)
}
// Deprecated: Use VersionedTransition.ProtoReflect.Descriptor instead.
func (*VersionedTransition) Descriptor() ([]byte, []int) {
return file_temporal_server_api_persistence_v1_hsm_proto_rawDescGZIP(), []int{5}
}
func (x *VersionedTransition) GetNamespaceFailoverVersion() int64 {
if x != nil {
return x.NamespaceFailoverVersion
}
return 0
}
func (x *VersionedTransition) GetMaxTransitionCount() int64 {
if x != nil {
return x.MaxTransitionCount
}
return 0
}
var File_temporal_server_api_persistence_v1_hsm_proto protoreflect.FileDescriptor
var file_temporal_server_api_persistence_v1_hsm_proto_rawDesc = []byte{
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}
var (
file_temporal_server_api_persistence_v1_hsm_proto_rawDescOnce sync.Once
file_temporal_server_api_persistence_v1_hsm_proto_rawDescData = file_temporal_server_api_persistence_v1_hsm_proto_rawDesc
)
func file_temporal_server_api_persistence_v1_hsm_proto_rawDescGZIP() []byte {
file_temporal_server_api_persistence_v1_hsm_proto_rawDescOnce.Do(func() {
file_temporal_server_api_persistence_v1_hsm_proto_rawDescData = protoimpl.X.CompressGZIP(file_temporal_server_api_persistence_v1_hsm_proto_rawDescData)
})
return file_temporal_server_api_persistence_v1_hsm_proto_rawDescData
}
var file_temporal_server_api_persistence_v1_hsm_proto_msgTypes = make([]protoimpl.MessageInfo, 8)
var file_temporal_server_api_persistence_v1_hsm_proto_goTypes = []interface{}{
(*StateMachineNode)(nil), // 0: temporal.server.api.persistence.v1.StateMachineNode
(*StateMachineMap)(nil), // 1: temporal.server.api.persistence.v1.StateMachineMap
(*StateMachineKey)(nil), // 2: temporal.server.api.persistence.v1.StateMachineKey
(*StateMachineRef)(nil), // 3: temporal.server.api.persistence.v1.StateMachineRef
(*StateMachineTaskInfo)(nil), // 4: temporal.server.api.persistence.v1.StateMachineTaskInfo
(*VersionedTransition)(nil), // 5: temporal.server.api.persistence.v1.VersionedTransition
nil, // 6: temporal.server.api.persistence.v1.StateMachineNode.ChildrenEntry
nil, // 7: temporal.server.api.persistence.v1.StateMachineMap.MachinesByIdEntry
}
var file_temporal_server_api_persistence_v1_hsm_proto_depIdxs = []int32{
6, // 0: temporal.server.api.persistence.v1.StateMachineNode.children:type_name -> temporal.server.api.persistence.v1.StateMachineNode.ChildrenEntry
7, // 1: temporal.server.api.persistence.v1.StateMachineMap.machines_by_id:type_name -> temporal.server.api.persistence.v1.StateMachineMap.MachinesByIdEntry
2, // 2: temporal.server.api.persistence.v1.StateMachineRef.path:type_name -> temporal.server.api.persistence.v1.StateMachineKey
3, // 3: temporal.server.api.persistence.v1.StateMachineTaskInfo.ref:type_name -> temporal.server.api.persistence.v1.StateMachineRef
1, // 4: temporal.server.api.persistence.v1.StateMachineNode.ChildrenEntry.value:type_name -> temporal.server.api.persistence.v1.StateMachineMap
0, // 5: temporal.server.api.persistence.v1.StateMachineMap.MachinesByIdEntry.value:type_name -> temporal.server.api.persistence.v1.StateMachineNode
6, // [6:6] is the sub-list for method output_type
6, // [6:6] is the sub-list for method input_type
6, // [6:6] is the sub-list for extension type_name
6, // [6:6] is the sub-list for extension extendee
0, // [0:6] is the sub-list for field type_name
}
func init() { file_temporal_server_api_persistence_v1_hsm_proto_init() }
func file_temporal_server_api_persistence_v1_hsm_proto_init() {
if File_temporal_server_api_persistence_v1_hsm_proto != nil {
return
}
if !protoimpl.UnsafeEnabled {
file_temporal_server_api_persistence_v1_hsm_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
switch v := v.(*StateMachineNode); i {
case 0:
return &v.state
case 1:
return &v.sizeCache
case 2:
return &v.unknownFields
default:
return nil
}
}
file_temporal_server_api_persistence_v1_hsm_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
switch v := v.(*StateMachineMap); i {
case 0:
return &v.state
case 1:
return &v.sizeCache
case 2:
return &v.unknownFields
default:
return nil
}
}
file_temporal_server_api_persistence_v1_hsm_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
switch v := v.(*StateMachineKey); i {
case 0:
return &v.state
case 1:
return &v.sizeCache
case 2:
return &v.unknownFields
default:
return nil
}
}
file_temporal_server_api_persistence_v1_hsm_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} {
switch v := v.(*StateMachineRef); i {
case 0:
return &v.state
case 1:
return &v.sizeCache
case 2:
return &v.unknownFields
default:
return nil
}
}
file_temporal_server_api_persistence_v1_hsm_proto_msgTypes[4].Exporter = func(v interface{}, i int) interface{} {
switch v := v.(*StateMachineTaskInfo); i {
case 0:
return &v.state
case 1:
return &v.sizeCache
case 2:
return &v.unknownFields
default:
return nil
}
}
file_temporal_server_api_persistence_v1_hsm_proto_msgTypes[5].Exporter = func(v interface{}, i int) interface{} {
switch v := v.(*VersionedTransition); i {
case 0:
return &v.state
case 1:
return &v.sizeCache
case 2:
return &v.unknownFields
default:
return nil
}
}
}
type x struct{}
out := protoimpl.TypeBuilder{
File: protoimpl.DescBuilder{
GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
RawDescriptor: file_temporal_server_api_persistence_v1_hsm_proto_rawDesc,
NumEnums: 0,
NumMessages: 8,
NumExtensions: 0,
NumServices: 0,
},
GoTypes: file_temporal_server_api_persistence_v1_hsm_proto_goTypes,
DependencyIndexes: file_temporal_server_api_persistence_v1_hsm_proto_depIdxs,
MessageInfos: file_temporal_server_api_persistence_v1_hsm_proto_msgTypes,
}.Build()
File_temporal_server_api_persistence_v1_hsm_proto = out.File
file_temporal_server_api_persistence_v1_hsm_proto_rawDesc = nil
file_temporal_server_api_persistence_v1_hsm_proto_goTypes = nil
file_temporal_server_api_persistence_v1_hsm_proto_depIdxs = nil
}