State Change

This activity provides your flogo application the ability to detect state change for up to eight inputs.

Installation

flogo install github.com/jvanderl/flogo-components/activity/statechange

Link for flogo web:

https://github.com/jvanderl/flogo-components/activity/statechange

Schema

Inputs and Outputs:

{
 "input":[
    {
      "name": "datasource",
      "type": "string"
    },
    {
      "name": "input1",
      "type": "string"
    },
    {
      "name": "input2",
      "type": "string"
    },
    {
      "name": "input3",
      "type": "string"
    },
    {
      "name": "input4",
      "type": "string"
    },
    {
      "name": "input5",
      "type": "string"
    },
    {
      "name": "input6",
      "type": "string"
    },
    {
      "name": "input7",
      "type": "string"
    },
    {
      "name": "input8",
      "type": "string"
    }   
  ],
  "output": [
    {
      "name": "changed",
      "type": "boolean"
    },
    {
      "name": "flags",
      "type": "integer"
    },
    {
      "name": "result",
      "type": "string"
    }
  ]
}

Settings

Setting	Description
datasource	For identifying unique values
input 1-8	input values for detecting change. Make sure you use the same inputs for each type of value across your flow

Ouputs

Output	Description
changed	Determines if any of the input values have changed (true, false)
flags	Bitwise representation wat input value has changed. flags & 1 = input 1, flags & 2 = intput 2, flags & 4 = input 3, flags & 8 = input 4, flags & 16 = input 5 etc.
result	Result of state change in text, return "NO_CHANGE" if no input changed state

Configuration Examples

Simple

Configure a task in flow to only pass data only once per 10 seconds:

{
  "name": "teststatechange",
  "model": "tibco-simple",
  "type": 1,
  "attributes": [],
  "rootTask": {
    "id": 1,
    "type": 1,
    "activityType": "",
    "name": "root",
    "tasks": [
      {
        "id": 2,
        "name": "State Change",
        "type": 1,
        "activityType": "statechange",
        "attributes": [
          {
            "name": "datasource",
            "value": "flogo/device/DEV12345/distance",
            "type": "string"
          },
          {
            "name": "input1",
            "value": "10",
            "type": "integer"
          }
        ]
      },
      {
        "id": 3,
        "name": "Log Message",
        "type": 1,
        "activityType": "tibco-log",
        "attributes": [
          {
            "name": "message",
            "value": "",
            "type": "string"
          },
          {
            "name": "flowInfo",
            "value": "true",
            "type": "boolean"
          },
          {
            "name": "addToFlow",
            "value": "true",
            "type": "boolean"
          }
        ],
        "inputMappings": [
          {
            "type": 1,
            "value": "{A2.result}",
            "mapTo": "message"
          }
        ]
      }
    ],
    "links": [
      {
        "id": 1,
        "from": 2,
        "to": 3,
        "type": 0
      }
    ]
  }
}