如何使用文件中定义的状态计算机在本地执行AWS步骤函数？ 我遵循了AWS文档的步骤，以便在本地设置并运行AWS步骤功能：https：//docs.aws.amazon.com/step-functions/latest/dg/dg/sfn-local-lambda。 html。 一切都很好，...

Question

所有功能都很好，但是在第5步中，它说您必须创建一台状态机，并且使用命令行执行此操作可能会很痛苦，而当定义包含许多任务时。

有任何方法可以启动在本地.ASL文件中定义的状态机的执行？ 这是我本地定义的状态机的一个示例（来自模板）：

{
    "Comment": "A state machine that does mock stock trading.",
    "StartAt": "Check Stock Value",
    "States": {
        "Check Stock Value": {
            "Type": "Task",
            "Resource": "${StockCheckerFunctionArn}",
            "Retry": [
                {
                    "ErrorEquals": [
                        "States.TaskFailed"
                    ],
                    "IntervalSeconds": 15,
                    "MaxAttempts": 5,
                    "BackoffRate": 1.5
                }
            ],
            "Next": "Buy or Sell?"
        },
        "Buy or Sell?": {
            "Type": "Choice",
            "Choices": [
                {
                    "Variable": "$.stock_price",
                    "NumericLessThanEquals": 50,
                    "Next": "Buy Stock"
                }
            ],
            "Default": "Sell Stock"
        },
        "Sell Stock": {
            "Type": "Task",
            "Resource": "${StockSellerFunctionArn}",
            "Retry": [
                {
                    "ErrorEquals": [
                        "States.TaskFailed"
                    ],
                    "IntervalSeconds": 2,
                    "MaxAttempts": 3,
                    "BackoffRate": 1
                }
            ],
            "Next": "Record Transaction"
        },
        "Buy Stock": {
            "Type": "Task",
            "Resource": "${StockBuyerFunctionArn}",
            "Retry": [
                {
                    "ErrorEquals": [
                        "States.TaskFailed"
                    ],
                    "IntervalSeconds": 2,
                    "MaxAttempts": 3,
                    "BackoffRate": 1
                }
            ],
            "Next": "Record Transaction"
        },
        "Record Transaction": {
            "Type": "Task",
            "Resource": "${DDBPutItem}",
            "Parameters": {
                "TableName": "${DDBTable}",
                "Item": {
                    "Id": {
                        "S.$": "$.id"
                    },
                    "Type": {
                        "S.$": "$.type"
                    },
                    "Price": {
                        "N.$": "$.price"
                    },
                    "Quantity": {
                        "N.$": "$.qty"
                    },
                    "Timestamp": {
                        "S.$": "$.timestamp"
                    }
                }
            },
            "Retry": [
                {
                    "ErrorEquals": [
                        "States.TaskFailed"
                    ],
                    "IntervalSeconds": 20,
                    "MaxAttempts": 5,
                    "BackoffRate": 10
                }
            ],
            "End": true
        }
    }
}

您可以使用

cat

将文件读为字符串。

aws stepfunctions --endpoint http://localhost:8083 create-state-machine --definition "$(cat local.asl.json)" --name "HelloWorld" --role-arn "arn:aws:iam::012345678901:role/DummyRole"

Answer 1

使用命令替代：

aws stepfunctions --endpoint http://localhost:8083 create-state-machine \
    --definition "$(< local.asl.json)" \
    --name "HelloWorld" \
    --role-arn "arn:aws:iam::012345678901:role/DummyRole";

要了解更多信息，在

Answer 2

中搜索

man bash;

。