GS2-StateMachine Deploy/CDK Reference

The template format used when creating stacks with GS2-Deploy, and implementation examples of template output in various languages using CDK

Entities

Resources targeted by the Deploy operation

Namespace

A Namespace allows multiple independent instances of the same service within a single project by separating data spaces and usage contexts. Each GS2 service is managed on a per-namespace basis. Even when using the same service, if the namespace differs, the data is treated as a completely independent data space.

Therefore, you must create a namespace before you can start using each service.

Request

Resource creation and update requests

Type Condition Required Default Value Limits Description

name

string

✓

~ 128 chars

Namespace name

Namespace-specific name. Specified using alphanumeric characters, hyphens (-), underscores (_), and periods (.).

description string ~ 1024 chars Description

supportSpeculativeExecution

String Enum
enum {
“enable”,
“disable”
}

“disable”

Whether to support speculative execution

When enabled, state machine definitions and random status are embedded in the Status entity, allowing clients to simulate state transitions locally before server confirmation. Requires transactionSetting to be configured.

Definition	Description
“enable”	Enable
“disable”	Disable

transactionSetting

TransactionSetting

{supportSpeculativeExecution} == “enable”

Transaction Settings

Configuration for controlling how transactions are processed when executing state machine emit actions. Required when speculative execution is enabled.

* Applicable only if supportSpeculativeExecution is “enable”

startScript

ScriptSetting

Script to execute when starting the state machine

Script Trigger Reference - start

passScript

ScriptSetting

Script to execute when the state machine is successfully completed

Script Trigger Reference - pass

errorScript

ScriptSetting

Script to execute when the state machine fails

Script Trigger Reference - error

lowestStateMachineVersion

long

Lowest version of the state machine

The minimum acceptable version for running state machines. Status instances created with a state machine version older than this value will be rejected, ensuring all running instances use up-to-date definitions.

logSetting

LogSetting

Log Output Settings

Specifies the GS2-Log namespace for outputting API request/response logs related to state machine execution, state transitions, and emit events.

GetAttr

Resource creation results that can be retrieved using the !GetAttr tag

	Type	Description
Item	Namespace	Namespace created

Implementation Example

Type: GS2::StateMachine::Namespace
Properties:
  Name: namespace-0001
  Description: null
  SupportSpeculativeExecution: null
  TransactionSetting: null
  StartScript: null
  PassScript: null
  ErrorScript: null
  LowestStateMachineVersion: null
  LogSetting: 
    LoggingNamespaceId: grn:gs2:ap-northeast-1:YourOwnerId:log:namespace-0001

import (
    "github.com/gs2io/gs2-golang-cdk/core"
    "github.com/gs2io/gs2-golang-cdk/stateMachine"
)


SampleStack := core.NewStack()
stateMachine.NewNamespace(
    &SampleStack,
    "namespace-0001",
    stateMachine.NamespaceOptions{
        LogSetting: &core.LogSetting{
            LoggingNamespaceId: "grn:gs2:ap-northeast-1:YourOwnerId:log:namespace-0001",
        },
    },
)

println(SampleStack.Yaml())  // Generate Template

class SampleStack extends \Gs2Cdk\Core\Model\Stack
{
    function __construct() {
        parent::__construct();
        new \Gs2Cdk\StateMachine\Model\Namespace_(
            stack: $this,
            name: "namespace-0001",
            options: new \Gs2Cdk\StateMachine\Model\Options\NamespaceOptions(
                logSetting: new \Gs2Cdk\Core\Model\LogSetting(
                    loggingNamespaceId: "grn:gs2:ap-northeast-1:YourOwnerId:log:namespace-0001"
                )
            )
        );
    }
}

print((new SampleStack())->yaml());  // Generate Template

class SampleStack extends io.gs2.cdk.core.model.Stack
{
    public SampleStack() {
        super();
        new io.gs2.cdk.stateMachine.model.Namespace(
                this,
                "namespace-0001",
                new io.gs2.cdk.stateMachine.model.options.NamespaceOptions()
                        .withLogSetting(new io.gs2.cdk.core.model.LogSetting(
                            "grn:gs2:ap-northeast-1:YourOwnerId:log:namespace-0001"
                        ))
        );
    }
}

System.out.println(new SampleStack().yaml());  // Generate Template

public class SampleStack : Gs2Cdk.Core.Model.Stack
{
    public SampleStack() {
        new Gs2Cdk.Gs2StateMachine.Model.Namespace(
            stack: this,
            name: "namespace-0001",
            options: new Gs2Cdk.Gs2StateMachine.Model.Options.NamespaceOptions
            {
                logSetting = new Gs2Cdk.Core.Model.LogSetting(
                    loggingNamespaceId: "grn:gs2:ap-northeast-1:YourOwnerId:log:namespace-0001"
                )
            }
        );
    }
}

Debug.Log(new SampleStack().Yaml());  // Generate Template

import core from "@/gs2cdk/core";
import stateMachine from "@/gs2cdk/stateMachine";

class SampleStack extends core.Stack
{
    public constructor() {
        super();
        new stateMachine.model.Namespace(
            this,
            "namespace-0001",
            {
                logSetting: new core.LogSetting(
                    "grn:gs2:ap-northeast-1:YourOwnerId:log:namespace-0001"
                )
            }
        );
    }
}

console.log(new SampleStack().yaml());  // Generate Template

from gs2_cdk import Stack, core, state_machine

class SampleStack(Stack):

    def __init__(self):
        super().__init__()
        state_machine.Namespace(
            stack=self,
            name='namespace-0001',
            options=state_machine.NamespaceOptions(
                log_setting=core.LogSetting(
                    logging_namespace_id='grn:gs2:ap-northeast-1:YourOwnerId:log:namespace-0001',
                ),
            ),
        )

print(SampleStack().yaml())  # Generate Template

TransactionSetting

Transaction Settings

Transaction Settings control how transactions are executed, their consistency, asynchronous processing, and conflict avoidance mechanisms. Combining features like AutoRun, AtomicCommit, asynchronous execution using GS2-Distributor, batch application of script results, and asynchronous Acquire Actions via GS2-JobQueue enables robust transaction management tailored to game logic.

	Type	Condition	Default	Value Limits	Description
enableAutoRun	bool		false		Whether to automatically execute issued transactions on the server side
enableAtomicCommit	bool	{enableAutoRun} == true	false		Whether to commit the execution of transactions atomically * Applicable only if enableAutoRun is true
transactionUseDistributor	bool	{enableAtomicCommit} == true	false		Whether to execute transactions asynchronously * Applicable only if enableAtomicCommit is true
commitScriptResultInUseDistributor	bool	{transactionUseDistributor} == true	false		Whether to execute the commit processing of the script result asynchronously * Applicable only if transactionUseDistributor is true
acquireActionUseJobQueue	bool	{enableAtomicCommit} == true	false		Whether to use GS2-JobQueue to execute the acquire action * Applicable only if enableAtomicCommit is true
distributorNamespaceId	string		“grn:gs2:{region}:{ownerId}:distributor:default”	~ 1024 chars	GS2-Distributor Namespace GRN used to execute transactions
queueNamespaceId	string		“grn:gs2:{region}:{ownerId}:queue:default”	~ 1024 chars	GS2-JobQueue Namespace GRN used to execute transactions

ScriptSetting

Script Setting

In GS2, you can associate custom scripts with microservice events and execute them. This model holds the settings for triggering script execution.

There are two main ways to execute a script: synchronous execution and asynchronous execution. Synchronous execution blocks processing until the script has finished executing. Instead, you can use the script’s execution results to halt API execution or control the API’s response content.

In contrast, asynchronous execution does not block processing until the script has finished executing. However, because the script result cannot be used to stop the API execution or modify the API response, asynchronous execution does not affect the API response flow and is generally recommended.

There are two types of asynchronous execution methods: GS2-Script and Amazon EventBridge. By using Amazon EventBridge, you can write processing in languages other than Lua.

Type

Condition

Required

Default

Value Limits

Description

triggerScriptId

string

~ 1024 chars

GS2-Script script GRN executed synchronously when the API is executed

Must be specified in GRN format starting with “grn:gs2:”.

doneTriggerTargetType

String Enum
enum {
  “none”,
  “gs2_script”,
  “aws”
}

“none”

How to execute asynchronous scripts

Specifies the type of script to use for asynchronous execution.
You can choose from “Do not use asynchronous execution (none)”, “Use GS2-Script (gs2_script)”, and “Use Amazon EventBridge (aws)”.

Definition	Description
“none”	None
“gs2_script”	GS2-Script
“aws”	Amazon EventBridge

doneTriggerScriptId

string

{doneTriggerTargetType} == “gs2_script”

~ 1024 chars

Script GRN to be executed upon completion

Must be specified in GRN format starting with “grn:gs2:”.

* Applicable only if doneTriggerTargetType is “gs2_script”

doneTriggerQueueNamespaceId

string

{doneTriggerTargetType} == “gs2_script”

~ 1024 chars

GS2-JobQueue namespace GRN to execute asynchronous execution scripts

Used when you want to know the completion of the done script.

* Applicable only if doneTriggerTargetType is “gs2_script”

LogSetting

Log Output Settings

Log Output Settings define how log data is exported. This type holds the GS2-Log namespace identifier (Namespace ID) used to export log data. Specify the GS2-Log namespace where log data is collected and stored in the GRN format for the Log Namespace ID (loggingNamespaceId). Configuring this setting ensures that log data for API requests and responses occurring within the specified namespace is output to the target GS2-Log namespace. GS2-Log provides real-time logs that can be used for system monitoring, analysis, debugging, and other operational purposes.

	Type	Condition	Required	Default	Value Limits	Description
loggingNamespaceId	string		✓		~ 1024 chars	GS2-Log namespace GRN to output logs Must be specified in GRN format starting with “grn:gs2:”.

StateMachineMaster

State machine definition

Manages state machines written in GSL.

Request

Resource creation and update requests

	Type	Required	Value Limits	Description
namespaceName	string	✓	~ 128 chars	Namespace name Namespace-specific name. Specified using alphanumeric characters, hyphens (-), underscores (_), and periods (.).
mainStateMachineName	string	✓	~ 128 chars	Main state machine name The name of the entry-point state machine in the GSL definition. Execution begins from this state machine, which can call sub-state machines via the stack mechanism.
payload	string	✓	~ 5242880 chars	State machine definition The GSL (GS2 State Language) source code that defines the state machine’s states, transitions, and actions. Stored separately from the metadata for efficient retrieval.

GetAttr

Resource creation results that can be retrieved using the !GetAttr tag

	Type	Description
Item	StateMachineMaster	Created State Machine Master

Implementation Example

Type: GS2::StateMachine::StateMachineMaster
Properties:
  NamespaceName: namespace-0001
  MainStateMachineName: MainStateMachine
  Payload: \nStateMachine MainStateMachine {\n  EntryPoint Task1;\n\n  Task Task1(int initCounter) {\n    Event Pass();\n    Event Error(string Reason);\n\n    Script grn:gs2:ap-northeast-1:YourOwnerId:script:state-machine-0001:script:Task1\n  }\n\n  PassTask Pass;\n\n  ErrorTask Error(string reason);\n\n  Transition Task1 handling Pass -> Pass;\n  Transition Task1 handling Error -> Error;\n}\n

import (
    "github.com/gs2io/gs2-golang-cdk/core"
    "github.com/gs2io/gs2-golang-cdk/stateMachine"
)


SampleStack := core.NewStack()
stateMachine.NewStateMachineMaster(
    &SampleStack,
    "namespace-0001",
    "MainStateMachine",
    "\nStateMachine MainStateMachine {\n  EntryPoint Task1;\n\n  Task Task1(int initCounter) {\n    Event Pass();\n    Event Error(string Reason);\n\n    Script grn:gs2:ap-northeast-1:YourOwnerId:script:state-machine-0001:script:Task1\n  }\n\n  PassTask Pass;\n\n  ErrorTask Error(string reason);\n\n  Transition Task1 handling Pass -> Pass;\n  Transition Task1 handling Error -> Error;\n}\n    ",
    stateMachine.StateMachineMasterOptions{},
)

println(SampleStack.Yaml())  // Generate Template

class SampleStack extends \Gs2Cdk\Core\Model\Stack
{
    function __construct() {
        parent::__construct();
        new \Gs2Cdk\StateMachine\Model\StateMachineMaster(
            stack: $this,
            namespaceName: "namespace-0001",
            mainStateMachineName: "MainStateMachine",
            payload: "\nStateMachine MainStateMachine {\n  EntryPoint Task1;\n\n  Task Task1(int initCounter) {\n    Event Pass();\n    Event Error(string Reason);\n\n    Script grn:gs2:ap-northeast-1:YourOwnerId:script:state-machine-0001:script:Task1\n  }\n\n  PassTask Pass;\n\n  ErrorTask Error(string reason);\n\n  Transition Task1 handling Pass -> Pass;\n  Transition Task1 handling Error -> Error;\n}\n    "
        );
    }
}

print((new SampleStack())->yaml());  // Generate Template

class SampleStack extends io.gs2.cdk.core.model.Stack
{
    public SampleStack() {
        super();
        new io.gs2.cdk.stateMachine.model.StateMachineMaster(
                this,
                "namespace-0001",
                "MainStateMachine",
                "\nStateMachine MainStateMachine {\n  EntryPoint Task1;\n\n  Task Task1(int initCounter) {\n    Event Pass();\n    Event Error(string Reason);\n\n    Script grn:gs2:ap-northeast-1:YourOwnerId:script:state-machine-0001:script:Task1\n  }\n\n  PassTask Pass;\n\n  ErrorTask Error(string reason);\n\n  Transition Task1 handling Pass -> Pass;\n  Transition Task1 handling Error -> Error;\n}\n    "
        );
    }
}

System.out.println(new SampleStack().yaml());  // Generate Template

public class SampleStack : Gs2Cdk.Core.Model.Stack
{
    public SampleStack() {
        new Gs2Cdk.Gs2StateMachine.Model.StateMachineMaster(
            stack: this,
            namespaceName: "namespace-0001",
            mainStateMachineName: "MainStateMachine",
            payload: "\nStateMachine MainStateMachine {\n  EntryPoint Task1;\n\n  Task Task1(int initCounter) {\n    Event Pass();\n    Event Error(string Reason);\n\n    Script grn:gs2:ap-northeast-1:YourOwnerId:script:state-machine-0001:script:Task1\n  }\n\n  PassTask Pass;\n\n  ErrorTask Error(string reason);\n\n  Transition Task1 handling Pass -> Pass;\n  Transition Task1 handling Error -> Error;\n}\n    "
        );
    }
}

Debug.Log(new SampleStack().Yaml());  // Generate Template

import core from "@/gs2cdk/core";
import stateMachine from "@/gs2cdk/stateMachine";

class SampleStack extends core.Stack
{
    public constructor() {
        super();
        new stateMachine.model.StateMachineMaster(
            this,
            "namespace-0001",
            "MainStateMachine",
            "\nStateMachine MainStateMachine {\n  EntryPoint Task1;\n\n  Task Task1(int initCounter) {\n    Event Pass();\n    Event Error(string Reason);\n\n    Script grn:gs2:ap-northeast-1:YourOwnerId:script:state-machine-0001:script:Task1\n  }\n\n  PassTask Pass;\n\n  ErrorTask Error(string reason);\n\n  Transition Task1 handling Pass -> Pass;\n  Transition Task1 handling Error -> Error;\n}\n    "
        );
    }
}

console.log(new SampleStack().yaml());  // Generate Template

from gs2_cdk import Stack, core, state_machine

class SampleStack(Stack):

    def __init__(self):
        super().__init__()
        state_machine.StateMachineMaster(
            stack=self,
            namespace_name='namespace-0001',
            main_state_machine_name='MainStateMachine',
            payload='\nStateMachine MainStateMachine {\n  EntryPoint Task1;\n\n  Task Task1(int initCounter) {\n    Event Pass();\n    Event Error(string Reason);\n\n    Script grn:gs2:ap-northeast-1:YourOwnerId:script:state-machine-0001:script:Task1\n  }\n\n  PassTask Pass;\n\n  ErrorTask Error(string reason);\n\n  Transition Task1 handling Pass -> Pass;\n  Transition Task1 handling Error -> Error;\n}\n    ',
        )

print(SampleStack().yaml())  # Generate Template

GS2 States Language Definition Extension

extension syntax for defining GS2 States Language in CDK