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  4. dw::Runtime

  5. eval

eval

eval(fileToExecute: String, fs: Dictionary<String>, readerInputs: Dictionary<ReaderInput> = ​{}, inputValues: Dictionary<Any> = ​{}, configuration: RuntimeExecutionConfiguration = ​{}​): EvalSuccess | ExecutionFailure

指定されたコンテキストを使用してスクリプトを評価し、その評価の結果を返します。

実験的:​ この関数は実験的機能であり、DataWeave の将来のバージョンで変更または削除される場合があります。

パラメーター

名前 説明

​fileToExecute

実行するファイルの名前。

​fs

評価するファイルが含まれるオブジェクト。

​readerInputs

バインドするリーダー入力。

​inputValues

バインドする追加のリテラル値。

​configuration

ランタイム設定。

例

次の例では、さまざまな入力での ​eval​ の動作を示します。

ソース

%dw 2.0
import * from dw::Runtime

var jsonValue = {
   value: '{"name": "Mariano"}' as Binary {encoding: "UTF-8"},
   encoding: "UTF-8",
   properties: {},
   mimeType: "application/json"
}

var jsonValue2 = {
   value: '{"name": "Mariano", "lastName": "achaval"}' as Binary {encoding: "UTF-8"},
   encoding: "UTF-8",
   properties: {},
   mimeType: "application/json"
}

var invalidJsonValue = {
   value: '{"name": "Mariano' as Binary {encoding: "UTF-8"},
   encoding: "UTF-8",
   properties: {},
   mimeType: "application/json"
}

var Utils = "fun sum(a,b) = a +b"
output application/json
---
{
   "execute_ok" : run("main.dwl", {"main.dwl": "{a: 1}"}, {"payload": jsonValue }),
   "logs" : do {
     var execResult = run("main.dwl", {"main.dwl": "{a: log(1)}"}, {"payload": jsonValue })
     ---
     {
         m: execResult.logs.message,
         l: execResult.logs.level
     }
   },
   "grant" : eval("main.dwl", {"main.dwl": "{a: readUrl(`http://google.com`)}"}, {"payload": jsonValue }, {},{ securityManager: (grant, args) -> false }),
   "library" : eval("main.dwl", {"main.dwl": "Utils::sum(1,2)", "/Utils.dwl": Utils }, {"payload": jsonValue }),
   "timeout" : eval("main.dwl", {"main.dwl": "(1 to 1000000000000) map \$ + 1" }, {"payload": jsonValue }, {},{timeOut: 2}).success,
   "execFail" : eval("main.dwl", {"main.dwl": "dw::Runtime::fail('My Bad')" }, {"payload": jsonValue }),
   "parseFail" : eval("main.dwl", {"main.dwl": "(1 + " }, {"payload": jsonValue }),
   "writerFail" : eval("main.dwl", {"main.dwl": "output application/xml --- 2" }, {"payload": jsonValue }),
   "defaultOutput" : eval("main.dwl", {"main.dwl": "payload" }, {"payload": jsonValue2}, {},{outputMimeType: "application/csv", writerProperties: {"separator": "|"}}),
   "onExceptionFail": do  {
     dw::Runtime::try( () ->
         eval("main.dwl", {"main.dwl": "dw::Runtime::fail('Failing Test')" }, {"payload": jsonValue2}, {},{onException: "FAIL"})
     ).success
   },
   "customLogger":
        eval(
  "main.dwl",
           {"main.dwl": "log(1234)" },
   {"payload": jsonValue2},
    {},
   {
                  loggerService: {
                     initialize: () -> {token: "123"},
                     log: (level, msg, context) -> log("$(level) $(msg)", context)
                  }
                }
           )
}

出力

{
  "execute_ok": {
    "success": true,
    "value": "{\n  a: 1\n}",
    "mimeType": "application/dw",
    "encoding": "UTF-8",
    "logs": [

    ]
  },
  "logs": {
    "m": [
      "1"
    ],
    "l": [
      "INFO"
    ]
  },
  "grant": {
    "success": false,
    "message": "The given required permissions: `Resource` are not being granted for this execution.\nTrace:\n  at readUrl (Unknown)\n  at main::main (line: 1, column: 5)",
    "location": {
      "start": {
        "index": 0,
        "line": 0,
        "column": 0
      },
      "end": {
        "index": 0,
        "line": 0,
        "column": 0
      },
      "content": "Unknown location"
    },
    "stack": [
      "readUrl (anonymous:0:0)",
      "main (main:1:5)"
    ],
    "logs": [

    ]
  },
  "library": {
    "success": true,
    "value": 3,
    "logs": [

    ]
  },
  "timeout": true,
  "execFail": {
    "success": false,
    "message": "My Bad\nTrace:\n  at fail (Unknown)\n  at main::main (line: 1, column: 1)",
    "location": {
      "start": {
        "index": 0,
        "line": 0,
        "column": 0
      },
      "end": {
        "index": 0,
        "line": 0,
        "column": 0
      },
      "content": "Unknown location"
    },
    "stack": [
      "fail (anonymous:0:0)",
      "main (main:1:1)"
    ],
    "logs": [

    ]
  },
  "parseFail": {
    "success": false,
    "message": "Invalid input \"1 + \", expected parameter or parenEnd (line 1, column 2):\n\n\n1| (1 + \n    ^^^^\nLocation:\nmain (line: 1, column:2)",
    "location": {
      "start": {
        "index": 0,
        "line": 1,
        "column": 2
      },
      "end": {
        "index": 4,
        "line": 1,
        "column": 6
      },
      "content": "\n1| (1 + \n    ^^^^"
    },
    "logs": [

    ]
  },
  "writerFail": {
    "success": true,
    "value": 2,
    "logs": [

    ]
  },
  "defaultOutput": {
    "success": true,
    "value": {
      "name": "Mariano",
      "lastName": "achaval"
    },
    "logs": [

    ]
  },
  "onExceptionFail": false,
  "customLogger": {
    "success": true,
    "value": 1234,
    "logs": [

    ]
  }
}