STREAM

The Purpose of the stream performer is to create a stream of output messages. Each instance of a performer will generate a stream from one of the following types

Types of stream

1. Heartbeat outputs the string “alive”
2. Timestamp outputs an epoch timestamp in milliseconds e.g. 1468378490974
3. RandomInteger outputs a random integer e.g. -1146318359
4. RandomDouble outputs a random double e.g. 0.6905682320596791
5. RandomUUID outputs a random UUID e.g. 2905d0ce-fe0f-46b5-b94e-77e38ccff789

Example Orchestration

Note this Performer requires you to set a “schedule”. In the example below we that the schedule is set to 1000 milliseconds (1 second). if you don't set the schedule the performer will not send any output message. In this example you might want to set the log-level=debug in your configuration file so you can see the messages that are being generated.

{
  "guid": "Orchestration",
  "command": "CREATE",
  "timestamp": "591997890",
  "name": "DESCRIPTION",
  "ensembles": [
    {
      "guid": "Ensemble",
      "command": "NONE",
      "performers": [
        {
          "guid": "Timestamp",
          "schedule": 1000,
          "backoff": 0,
          "source": {
            "name": "fey-stream.jar",
            "classPath": "org.apache.iota.fey.performer.Timestamp",
            "parameters": {
            }
          }
        }
      ],
      "connections": [
      ]
    }
  ]
}