GS2-Deploy/CDK Reference of GS2-StateMachine

Entities

Namespace

Namespace is a mechanism that allows multiple uses of the same service for different purposes within a single project. Basically, GS2 services have a layer called namespace, and different namespaces are treated as completely different data spaces, even for the same service.

Therefore, it is necessary to create a namespace before starting to use each service.

	Type	Require	Default	Limitation	Description
name	string	✓		~ 128 chars	Namespace name
description	string			~ 1024 chars	Description
supportSpeculativeExecution	string	✓	“disable”	~ 128 chars	Whether to support speculative execution
transactionSetting	TransactionSetting	{supportSpeculativeExecution} == “enable”			Transaction settings
startScript	ScriptSetting				Script to execute when starting the state machine
passScript	ScriptSetting				Script to execute when the state machine is successfully completed
errorScript	ScriptSetting				Script to execute when the state machine fails
lowestStateMachineVersion	long				Lowest version of the state machine
logSetting	LogSetting				Log output settings

Enumeration type definition to specify as supportSpeculativeExecution

Enumerator String Definition	Description
enable	Enable
disable	Disable

GetAttr

	Type	Description
Item	Namespace	Namespace created

Implementation Example

Type: GS2::StateMachine::Namespace
Properties:
  Name: namespace1
  Description: null
  SupportSpeculativeExecution: null
  TransactionSetting: null
  StartScript: null
  PassScript: null
  ErrorScript: null
  LowestStateMachineVersion: null
  LogSetting: 
    LoggingNamespaceId: grn:gs2:ap-northeast-1:YourOwnerId:log:namespace1

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

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() {
                {
                    logSetting = new io.gs2.cdk.core.model.LogSetting(
                        loggingNamespaceId = "grn:gs2:ap-northeast-1:YourOwnerId:log:namespace-0001"
                    );
                }
            }
        );
    }
}

System.out.println(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

public class SampleStack : Gs2Cdk.Core.Model.Stack
{
    public SampleStack() {
        new Gs2Cdk.Gs2StateMachine.Model.Namespace(
            this,
            "namespace-0001",
            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

StateMachineMaster

State machine definition

manages state machines written in GSL.

	Type	Require	Limitation	Description
namespaceName	string	✓	~ 128 chars	Namespace name
mainStateMachineName	string	✓	~ 128 chars	Main state machine name
payload	string	✓	~ 5242880 chars	State machine definition

GetAttr

	Type	Description
Item	StateMachineMaster	Created State Machine Master

Implementation Example

Type: GS2::StateMachine::StateMachineMaster
Properties:
  NamespaceName: namespace1
  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

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

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

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

public class SampleStack : Gs2Cdk.Core.Model.Stack
{
    public SampleStack() {
        new Gs2Cdk.Gs2StateMachine.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    "
        );
    }
}

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

StackEntry

Stack

	Type	Require	Default	Limitation	Description
stateMachineName	string	✓		~ 128 chars	Name of the state machine
taskName	string	✓		~ 128 chars	Task name

Variable

State variables per state machine

	Type	Require	Default	Limitation	Description
stateMachineName	string	✓		~ 128 chars	Name of the state machine
value	string	✓		~ 1048576 chars	Value

TransactionSetting

Transaction settings

	Type	Require	Default	Limitation	Description
enableAutoRun	bool	✓	false		Automatically run issued transactions on the server side, or
distributorNamespaceId	string	✓	“grn:gs2:{region}:{ownerId}:distributor:default”	~ 1024 chars	GS2-Distributor namespace used for transaction execution
queueNamespaceId	string	✓	“grn:gs2:{region}:{ownerId}:queue:default”	~ 1024 chars	Namespace in GS2-JobQueue used to run the transaction

Event

	Type	Require	Limitation	Description
eventType	enum { “change_state”, “emit” }	✓	~ 128 chars	Event type
changeStateEvent	ChangeStateEvent	{eventType} == “change_state”		Change state
emitEvent	EmitEvent	{eventType} == “emit”		Send a message

Enumeration type definition to specify as eventType

Enumerator String Definition	Description
change_state	Change state
emit	Send a message

ChangeStateEvent

Change state event

	Type	Require	Limitation	Description
taskName	string	✓	~ 128 chars	Task name
hash	string	✓	~ 64 chars	Hash
timestamp	long	✓		Timestamp (Unix time unit:milliseconds)

EmitEvent

Send a message event

	Type	Require	Limitation	Description
event	string	✓	~ 128 chars	Event name
parameters	string	✓	~ 1024 chars	Parameters
timestamp	long	✓		Timestamp (Unix time unit:milliseconds)

RandomStatus

Random number status

	Type	Require	Default	Limitation	Description
seed	long	✓		~ 4294967294	Random seed
used	List<RandomUsed>			~ 1000 items	List of used random number

RandomUsed

Used random number

	Type	Require	Default	Limitation	Description
category	long	✓		~ 4294967294	Category
used	long	✓		~ 4294967294	Used random number

LogSetting

Log setting

This type manages log output settings. This type holds the identifier of the log namespace used to output log data. The log namespace ID specifies the GS2-Log namespace to aggregate and store the log data. Through this setting, API request and response log data under this namespace will be output to the target GS2-Log. GS2-Log provides logs in real time, which can be used for system monitoring, analysis, debugging, etc.

	Type	Require	Default	Limitation	Description
loggingNamespaceId	string	✓		~ 1024 chars	Namespace GRN

ScriptSetting

Script settings

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 execution result to stop the execution of the API or to tamper with the result of the API.

On the other hand, asynchronous execution does not block processing until the script has finished executing. Instead, you can use the script execution result to stop the execution of the API or to tamper with the result of the API. However, asynchronous execution does not block processing until the script has finished executing, so it is generally recommended to use asynchronous execution.

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	Require	Default	Limitation	Description
triggerScriptId	string			~ 1024 chars	Script GRN
doneTriggerTargetType	enum { “none”, “gs2_script”, “aws” }	✓	“none”	~ 128 chars	Notification of Completion
doneTriggerScriptId	string	{doneTriggerTargetType} == “gs2_script”		~ 1024 chars	Script GRN
doneTriggerQueueNamespaceId	string	{doneTriggerTargetType} == “gs2_script”		~ 1024 chars	Namespace GRN

Enumeration type definition to specify as doneTriggerTargetType

Enumerator String Definition	Description
none	None
gs2_script	GS2-Script
aws	Amazon EventBridge

GS2 States Language Definition Extension

extension syntax for defining GS2 States Language in CDK