{
  "model": {
    "TITLE": {
      "value": "System Monitoring with Special Messages"
    },
    "AUTHOR": {
      "value": "Steve White",
      "readOnly": "true"
    },
    "MODELTYPE": {
      "value": "SEQUENCE_DIAGRAM",
      "inputType": "select",
      "refData": "MODELTYPE"
    },
    "DESCRIPTION": {
      "value": "Example showing self-calls, found messages, and lost messages in sequence diagrams",
      "inputType": "textarea"
    },
    "LAYOUT": {
      "inputType": "select",
      "value": "Sequence",
      "refData": "LAYOUTTYPE"
    }
  },
  "systems": [
    {
      "ID": "EXTERNAL_IN",
      "TEXT": "External",
      "TYPE": "SEQ_EXTERNAL"
    },
    {
      "ID": "EXTERNAL_OUT_1",
      "TEXT": "External",
      "TYPE": "SEQ_EXTERNAL"
    },
    {
      "ID": "EXTERNAL_OUT_2",
      "TEXT": "External",
      "TYPE": "SEQ_EXTERNAL"
    },
    {
      "ID": "MONITOR",
      "TEXT": "Monitor Service",
      "TYPE": "SEQ_COMPONENT"
    },
    {
      "ID": "VALIDATOR",
      "TEXT": "Validator",
      "TYPE": "SEQ_CONTROL"
    },
    {
      "ID": "LOGGER",
      "TEXT": "Logger",
      "TYPE": "SEQ_COMPONENT"
    },
    {
      "ID": "ALERT_MGR",
      "TEXT": "Alert Manager",
      "TYPE": "SEQ_CONTROL"
    }
  ],
  "interactions": [
    {
      "ID": "MSG1",
      "FROMID": "EXTERNAL_IN",
      "TOID": "MONITOR",
      "TEXT": "externalEvent(data)",
      "TYPE": "SEQ_FOUND"
    },
    {
      "ID": "MSG2",
      "FROMID": "MONITOR",
      "TOID": "MONITOR",
      "TEXT": "validateFormat()",
      "TYPE": "SEQ_SYNC_CALL"
    },
    {
      "ID": "MSG3",
      "FROMID": "MONITOR",
      "TOID": "MONITOR",
      "TEXT": "formatValid",
      "TYPE": "SEQ_RETURN"
    },
    {
      "ID": "FRG1",
      "TEXT": "retry on failure",
      "TYPE": "SEQ_FRG_LOOP"
    },
    {
      "ID": "MSG4",
      "FROMID": "MONITOR",
      "TOID": "VALIDATOR",
      "TEXT": "checkThresholds(data)",
      "TYPE": "SEQ_SYNC_CALL"
    },
    {
      "ID": "MSG5",
      "FROMID": "VALIDATOR",
      "TOID": "VALIDATOR",
      "TEXT": "calculateMetrics()",
      "TYPE": "SEQ_SYNC_CALL"
    },
    {
      "ID": "MSG6",
      "FROMID": "VALIDATOR",
      "TOID": "VALIDATOR",
      "TEXT": "metrics",
      "TYPE": "SEQ_RETURN"
    },
    {
      "ID": "MSG7",
      "FROMID": "VALIDATOR",
      "TOID": "MONITOR",
      "TEXT": "thresholdExceeded",
      "TYPE": "SEQ_RETURN"
    },
    {
      "ID": "FRG1_END",
      "TYPE": "SEQ_FRG_END"
    },
    {
      "ID": "MSG8",
      "FROMID": "MONITOR",
      "TOID": "LOGGER",
      "TEXT": "logEvent(severity, msg)",
      "TYPE": "SEQ_ASYNC_CALL"
    },
    {
      "ID": "MSG9",
      "FROMID": "LOGGER",
      "TOID": "EXTERNAL_OUT_1",
      "TEXT": "writeToFile()",
      "TYPE": "SEQ_LOST"
    },
    {
      "ID": "MSG10",
      "FROMID": "MONITOR",
      "TOID": "ALERT_MGR",
      "TEXT": "raiseAlert(details)",
      "TYPE": "SEQ_SYNC_CALL"
    },
    {
      "ID": "MSG11",
      "FROMID": "ALERT_MGR",
      "TOID": "EXTERNAL_OUT_2",
      "TEXT": "sendNotification()",
      "TYPE": "SEQ_LOST"
    },
    {
      "ID": "MSG12",
      "FROMID": "ALERT_MGR",
      "TOID": "MONITOR",
      "TEXT": "alertId",
      "TYPE": "SEQ_RETURN"
    }
  ]
}