Error while using the repeat() function in my Workflow defenition

[lindajoseph01]

2018-08-01 02:11:07,951 ERROR n.a.d.j.g.SimulationRunner [main] Error reading config: test
com.fasterxml.jackson.databind.JsonMappingException: Can not instantiate value of type [map type; class java.util.LinkedHashMap, [simple type, class java.lang.String] -> [simple type, class java.lang.Object]] from String value ('repeat(3)'); no single-String constructor/factory method
at [Source: java.io.BufferedInputStream@5b8dfcc1; line: 9, column: 23] (through reference chain: net.acesinc.data.json.generator.workflow.Workflow["steps"]->java.util.ArrayList[0]->net.acesinc.data.json.generator.workflow.WorkflowStep["config"]->java.util.ArrayList[0])
at com.fasterxml.jackson.databind.JsonMappingException.from(JsonMappingException.java:148) ~[jackson-databind-2.5.2.jar:2.5.2]
at com.fasterxml.jackson.databind.DeserializationContext.mappingException(DeserializationContext.java:843) ~[jackson-datab

myWorkflow.json:

GNU nano 2.2.6 File: conf/myWorkflow.json

{
"eventFrequency": 4000,
"varyEventFrequency": true,
"repeatWorkflow": true,
"timeBetweenRepeat": 60000,
"varyRepeatFrequency": true,

    "steps":[{
        "config":["repeat(3)",      {
                "timestamp": "nowTimestamp()",
                "system": "BADGE",
                "actor": "bob",
                "action": "ENTER",
                "objects": ["Building 1"],
                "location": "45.5,44.3",
                "message": "Entered Building 1"
            }

],
"duration": 0

}
]
}

[andrewserff]

Hi @lindajoseph01, I haven't verified with a test using your example, but I believe you are missing the {} around the item in the config. config is an array of objects. so it should look like:

...
"steps":[{
        "config":[{"repeat(3)",      {
                "timestamp": "nowTimestamp()",
                "system": "BADGE",
                "actor": "bob",
                "action": "ENTER",
                "objects": ["Building 1"],
                "location": "45.5,44.3",
                "message": "Entered Building 1"
            }
         }],
...

Try that out and see if that works

[lindajoseph01]

Hey @andrewserff Thank you for your response:)

I tried to execute the test as you mentioned. I am getting the following error:

Error reading config: test
com.fasterxml.jackson.databind.JsonMappingException: Unexpected character (',' (code 44)): was expecting a colon to separate field name and value
at [Source: java.io.BufferedInputStream@5b8dfcc1; line: 10, column: 38] (through reference chain: net.acesinc.data.json.generator.workflow.Workflow["steps"]->java.util.ArrayList[0]->net.acesinc.data.json.generator.workflow.WorkflowStep["config"]->java.util.ArrayList[0])
at com.fasterxml.jackson.databind.JsonMappingException.wrapWithPath(JsonMappingException.java:210) ~[jackson-databind-2.5.2.jar:2.5.2]

I used the repeat special function exactly as described in the documentation.I want to create 3 copies of the array in config.

[andrewserff]

Can you post your full config?

[caseycrites]

This is an extremely old ticket and I doubt I'll get a response, but I'm having the exact same issue. I want to create a top-level json array:

[
  {
    ...json object from my config
  },
  {
    ..json object from my config with different values from functions
  }
]

but cannot figure out how to make that happen. I also tried the suggestion above and got the exact same error as @lindajoseph01.

This is my workflow definition based on the suggestion given here (there's nothing of note in the simulation config):

{
    "repeatWorkflow": true,
    "iterations": 10,
    "eventFrequency": 100,
    "steps": [
        {
            "config": [
                {
                    "repeat(10)", {
                        "customer_id": "uuid()",
                        "event_type": "SOMETHING_IMPORTANT",
                        "transaction_id": "uuid()",
                        "timestamp": "now()",
                        "properties": {
                            "casey": "crites"
                        }
                    }
                }
            ]
        }
    ]
}

even based on the syntax highlighting, it's not valid json. I've tried a few other things, like using repeat(10) as the key of the object, but that doesn't work either.

[caseycrites]

based on the examples and the resources in the repo, my guess is this isn't supported. Everything points to the only arrays you can repeat are not top-level, but somewhere inside your json object.

[caseycrites]

Yeah, the config section expects a List<Map<String, Object>> which wouldn't support top-level arrays.

json-data-generator/src/main/java/net/acesinc/data/json/generator/workflow/WorkflowStep.java

Line 19 in 068e5d9

private List<Map<String, Object>> config;