Scatter Gather With Partial Results Asl

1{
2  "QueryLanguage": "JSONata",
3  "StartAt": "CallExternalAPIs",
4  "States": {
5    "CallExternalAPIs": {
6      "Type": "Map",
7      "Items": "{% $states.input.records %}",
8      "MaxConcurrency": 10,
9      "ToleratedFailurePercentage": 100,
10      "ItemProcessor": {
11        "ProcessorConfig": {
12          "Mode": "INLINE"
13        },
14        "StartAt": "CallAPI",
15        "States": {
16          "CallAPI": {
17            "Type": "Task",
18            "Resource": "arn:aws:states:::lambda:invoke",
19            "Arguments": {
20              "FunctionName": "arn:aws:lambda:us-east-1:123456789012:function:CallExternalAPI:$LATEST",
21              "Payload": "{% $states.input %}"
22            },
23            "Output": "{% $states.result.Payload %}",
24            "Retry": [
25              {
26                "ErrorEquals": [
27                  "States.TaskFailed"
28                ],
29                "IntervalSeconds": 2,
30                "MaxAttempts": 2,
31                "BackoffRate": 2.0,
32                "JitterStrategy": "FULL"
33              }
34            ],
35            "End": true
36          }
37        }
38      },
39      "Next": "SplitResults"
40    },
41    "SplitResults": {
42      "Type": "Pass",
43      "Assign": {
44        "successes": "{% ( $s := $states.input[$not($exists(Error))]; $type($s) = 'array' ? $s : $exists($s) ? [$s] : [] ) %}",
45        "failures": "{% ( $f := $states.input[$exists(Error)]; $type($f) = 'array' ? $f : $exists($f) ? [$f] : [] ) %}"
46      },
47      "Output": {
48        "successes": "{% ( $s := $states.input[$not($exists(Error))]; $type($s) = 'array' ? $s : $exists($s) ? [$s] : [] ) %}",
49        "failures": "{% ( $f := $states.input[$exists(Error)]; $type($f) = 'array' ? $f : $exists($f) ? [$f] : [] ) %}",
50        "totalProcessed": "{% $count($states.input) %}"
51      },
52      "Next": "EvaluateResults"
53    },
54    "EvaluateResults": {
55      "Type": "Choice",
56      "Choices": [
57        {
58          "Condition": "{% $count($successes) = 0 %}",
59          "Next": "AllFailed"
60        }
61      ],
62      "Default": "ProcessSuccesses"
63    },
64    "AllFailed": {
65      "Type": "Fail",
66      "Error": "AllItemsFailed",
67      "Cause": "Every item in the batch failed processing"
68    },
69    "ProcessSuccesses": {
70      "Type": "Succeed"
71    }
72  }
73}