在 AWS 步骤函数定义中，如何将参数传递到属性数组中？

问题描述

使用以下步骤函数状态定义，我想引用我在命令运行器参数中传递给它的月份、日期、年份参数。现在，连接意外地评估为 "--src=s3://arn:aws:s3::: bababucketName/$.YEAR/$.MONTH/$.DAY/"。有没有办法在云形成函数中使用阶跃函数参数？

"copyFromS3": {
    "Type": "Task","Resource": "arn:aws:states:::elasticmapreduce:addStep.sync","Parameters": {
    "ClusterId.$": "$.cluster.ClusterId","Step": {
        "Name": "copyFromS3","HadoopJarStep": {
        "Jar": "command-runner.jar","Args": [
            "s3-dist-cp",{
            "Fn::Join" : [ "",[ 
                "--src=s3://",{ "Ref": "VehicleDataBucket" },"telemetry/","$.YEAR","/","$.MONTH","$.DAY","/"
                ]
            ]
            },"--dest=hdfs:///output"
        ]
        }
    }
},

解决方法

请查看 States.Array 内部函数。 https://docs.aws.amazon.com/step-functions/latest/dg/amazon-states-language-intrinsic-functions.html

此外，AWS 刚刚发布了这个新工具，以便更轻松地开发工作流程。这应该可以帮助您编写状态机定义。 https://docs.aws.amazon.com/step-functions/latest/dg/workflow-studio.html