GS2-Script 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 managed 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	Required	Value Limits	Description
name	string	✓	~ 128 chars	Namespace name Unique Namespace name. Specified using alphanumeric characters, hyphens (-), underscores (_), and periods (.).
description	string		~ 1024 chars	Description
transactionSettingV2	TransactionSettingV2			Transaction Setting (V2) Decides how the transactions this Namespace issues are executed. There are only two things to set: the GS2-Distributor Namespace that executes them, and whether the actions in a transaction run one at a time – so that a later action can build on what an earlier one wrote – or all at once for a shorter response time. Set this on a new Namespace. `transactionSetting`, the obsolete setting it replaces, is used only while this is unset.
logSetting	LogSetting			Log Output Setting Specifies the GS2-Log Namespace for outputting API request and response logs. Used for tracking script invocations and their results.

GetAttr

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

	Type	Description
Item	Namespace	Namespace created

Implementation Example

Type: GS2::Script::Namespace
Properties:
  Name: namespace-0001
  Description: null
  TransactionSettingV2: 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/script"
)


SampleStack := core.NewStack()
script.NewNamespace(
    &SampleStack,
    "namespace-0001",
    script.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\Script\Model\Namespace_(
            stack: $this,
            name: "namespace-0001",
            options: new \Gs2Cdk\Script\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.script.model.Namespace(
                this,
                "namespace-0001",
                new io.gs2.cdk.script.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.Gs2Script.Model.Namespace(
            stack: this,
            name: "namespace-0001",
            options: new Gs2Cdk.Gs2Script.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 script from "@/gs2cdk/script";

class SampleStack extends core.Stack
{
    public constructor() {
        super();
        new script.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, script

class SampleStack(Stack):

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

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

TransactionSettingV2

Transaction Setting (V2)

Transaction Setting (V2) decides how the transactions issued by a Namespace are executed.

There are only two things to set:

distributorNamespaceId: the GS2-Distributor Namespace used to execute the transaction
enableParallelExecution: whether the actions in a transaction run one at a time or all at once

Whichever you choose, the transaction is executed by the server the moment it is issued, and it succeeds or fails as a whole: when an action fails, the actions that already ran are undone with it and nothing is left applied. Everything else about how a transaction runs is fixed to the recommended configuration, so there is nothing else to set.

Running the actions one at a time (the default, enableParallelExecution is false) lets each action work on top of what the actions before it wrote. The actions run in verify, consume, acquire order, and this is what lets you:

update the same row from more than one action in a single transaction, which fails when they run all at once
read what an earlier action wrote, including from List and Query and from inside a nested transaction
use %{Gs2Xxx:ActionName.path[0].field} to feed the result of an earlier verify or consume action into the parameters of a later verify, consume or acquire action

In exchange, the response time is the sum of the time taken by each action, and a transaction may contain at most 20 actions. The order within each phase is decided by the action name and then by the target resource, so you cannot choose the execution order by rearranging the actions in the request, and execution stops at the first action that fails.

Running the actions all at once (enableParallelExecution is true) executes them in parallel against a single snapshot of the data, so the response time is that of the slowest single action and there is no limit on the number of actions.

In exchange, an action cannot see what the other actions wrote, and two actions that write the same row fail the transaction with database:transaction:same.resource (400), so choose this only when you can guarantee that no two actions in the same transaction write the same data. %{...} may reference only the results of an earlier phase (verify, then consume, then acquire); a reference to an action in the same phase is left unresolved, and a phase that contains %{...} waits for the earlier phases to complete, which lengthens the response time by that amount.

Transaction Setting is the obsolete setting that Transaction Setting (V2) replaces, kept for Namespaces created before Transaction Setting (V2) existed. It applies only while Transaction Setting (V2) is unset, and setting Transaction Setting (V2) supersedes it. Three behaviours it allowed are deliberately not offered here: executing a transaction as a client-run stamp sheet, running AutoRun asynchronously via GS2-Distributor, and folding acquire actions into GS2-JobQueue.

	Type	Condition	Required	Default	Value Limits	Description
distributorNamespaceId	string			“grn:gs2:{region}:{ownerId}:distributor:default”	~ 1024 chars	GS2-Distributor Namespace GRN used to execute transactions
enableParallelExecution	bool			false		Whether to execute the actions in parallel instead of sequentially

LogSetting

Log Output Setting

Log Output Setting defines how log data is exported. This type holds the GS2-Log Namespace identifier (Namespace ID), which is 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:”.

TransactionSetting

Transaction Setting

Transaction Setting is obsolete: Transaction Setting (V2) replaces it. It is kept for Namespaces created before Transaction Setting (V2) existed, applies only while Transaction Setting (V2) is unset, and should not be chosen for a new Namespace.

It exposes each part of transaction execution as a separate field – AutoRun, AtomicCommit, asynchronous execution using GS2-Distributor, batch application of script results, asynchronous processing of acquire actions via GS2-JobQueue, and sequential execution – so combinations other than the recommended one can be built. Transaction Setting (V2) is that recommended combination expressed as a single setting. Keep using Transaction Setting only on a Namespace that already depends on a behaviour Transaction Setting (V2) does not offer: executing a transaction as a client-run stamp sheet, running AutoRun asynchronously via GS2-Distributor, or folding acquire actions into GS2-JobQueue.

	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 transactions atomically * Enabled only if enableAutoRun is true
transactionUseDistributor	bool	{enableAtomicCommit} == true	false		Whether to execute transactions asynchronously * Enabled only if enableAtomicCommit is true
commitScriptResultInUseDistributor	bool	{transactionUseDistributor} == true	false		Whether to execute the commit processing of the script result asynchronously * Enabled only if transactionUseDistributor is true
acquireActionUseJobQueue	bool	{enableAtomicCommit} == true	false		Whether to use GS2-JobQueue to execute the acquire action * Enabled only if enableAtomicCommit is true
enableSequentialExecution	bool	{enableAtomicCommit} == true	false		Whether to execute the actions of an atomic commit sequentially so that multiple actions may update the same row * Enabled 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

Script

GS2 provides scripts to extend functionality when the standard functions are not sufficient. Scripts can be written in the Lua language.

Scripts can also retrieve data from GS2 services, allowing for flexible processing. Please refer to the documentation for details.

Request

Resource creation and update requests

	Type	Required	Default	Value Limits	Description
namespaceName	string	✓		~ 128 chars	Namespace name Unique Namespace name. Specified using alphanumeric characters, hyphens (-), underscores (_), and periods (.).
name	string	✓		~ 128 chars	Script name Unique Script name. Specified using alphanumeric characters, hyphens (-), underscores (_), and periods (.).
description	string			~ 1024 chars	Description
script	string	✓		~ 5242880 chars	Lua Script The Lua script source code to execute. Scripts can access GS2 service data and return results that modify the behavior of the calling service.
disableStringNumberToNumber	bool		false		Disable String-Number Conversion When enabled, strings consisting only of digits (e.g., “12345”) are kept as strings instead of being automatically converted to numbers. Useful when handling IDs or codes that should remain as string type even if they look numeric.

GetAttr

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

	Type	Description
Item	Script	Script created

Implementation Example

Type: GS2::Script::Script
Properties:
  NamespaceName: namespace-0001
  Name: script-0001
  Description: null
  Script: result = {permit=true}
  DisableStringNumberToNumber: false

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


SampleStack := core.NewStack()
script.NewScript(
    &SampleStack,
    "namespace-0001",
    "script-0001",
    "result = {permit=true}",
    script.ScriptOptions{
        DisableStringNumberToNumber: false,
    },
)

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

class SampleStack extends \Gs2Cdk\Core\Model\Stack
{
    function __construct() {
        parent::__construct();
        new \Gs2Cdk\Script\Model\Script(
            stack: $this,
            namespaceName: "namespace-0001",
            name: "script-0001",
            script: "result = {permit=true}",
            options: new \Gs2Cdk\Script\Model\Options\ScriptOptions(
                disableStringNumberToNumber: false
            )
        );
    }
}

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

class SampleStack extends io.gs2.cdk.core.model.Stack
{
    public SampleStack() {
        super();
        new io.gs2.cdk.script.model.Script(
                this,
                "namespace-0001",
                "script-0001",
                "result = {permit=true}",
                new io.gs2.cdk.script.model.options.ScriptOptions()
                        .withDisableStringNumberToNumber(false)
        );
    }
}

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

public class SampleStack : Gs2Cdk.Core.Model.Stack
{
    public SampleStack() {
        new Gs2Cdk.Gs2Script.Model.Script(
            stack: this,
            namespaceName: "namespace-0001",
            name: "script-0001",
            script: "result = {permit=true}",
            options: new Gs2Cdk.Gs2Script.Model.Options.ScriptOptions
            {
                disableStringNumberToNumber = false
            }
        );
    }
}

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

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

class SampleStack extends core.Stack
{
    public constructor() {
        super();
        new script.model.Script(
            this,
            "namespace-0001",
            "script-0001",
            "result = {permit=true}",
            {
                disableStringNumberToNumber: false
            }
        );
    }
}

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

from gs2_cdk import Stack, core, script

class SampleStack(Stack):

    def __init__(self):
        super().__init__()
        script.Script(
            stack=self,
            namespace_name='namespace-0001',
            name='script-0001',
            script='result = {permit=true}',
            options=script.ScriptOptions(
                disable_string_number_to_number=False,
            ),
        )

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