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The FEWS Schematic Status Display (SSD) Web Service allows requesting SSD displays (formerly called Scada displays) using a simple REST web interface. This web service is available only in FEWS 2019 2020.01 and later versions.

For more information on configuring SSD/Scada displays, please refer to the SSD configuration page,  The SSD web service uses the same configuration as the FEWS explorer UI and report generator, so for an existing configuration setting up the FEWS SSD web services can use the same region home folder as the FEWS explorer UI without requiring additional configuration.

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{
  "results" : [ {
    "type" : "SSD",
    "requests" : [ {
      "request" : "Stevinsluizen"
    } ]
  } ]
}

Please note that in the FEWS scada/sdd display configuration, only one action can be configured for either a leftSingleClickAction or leftDoubleClickAction, yet the result of a GetAction request is presented as a list that can contains more than one result. This is because for some specific actions (i.e. openDisplay/timeSeriesDisplay) it is expected that more than one implementation may become available in the future.

An example action response for a openDisplay/timeSeriesDisplay action with multiple PI requests:

{
  "results" : [ {
    "type" : "PI",
    "requests" : [ {
      "request" : "rest/fewspiservice/v1/timeseries?timeSeriesType=EXTERNAL_HISTORICAL&locationIds=IJS_ReestWieden_In&parameterIds=Q.balans.in&moduleInstanceIds=Import_dump&startTime=2019-10-25T12%3A50%3A00Z&endTime=2019-11-02T12%3A50%3A00Z"
    }, {
      "request" : "rest/fewspiservice/v1/timeseries?timeSeriesType=EXTERNAL_HISTORICAL&locationIds=IJS_ReestWieden_In&parameterIds=Q.balans.in&moduleInstanceIds=Import_dump&qualifierIds=Gemiddelde&qualifierIds=24uur&timeStepId=Hydro_dag&startTime=2019-10-25T12%3A50%3A00Z&endTime=2019-11-02T12%3A50%3A00Z"
    }, {
      "request" : "rest/fewspiservice/v1/timeseries?timeSeriesType=EXTERNAL_FORECASTING&locationIds=IJS_ReestWieden_In&parameterIds=Q.balans.in&moduleInstanceIds=Import_dump&qualifierIds=Gemiddelde&qualifierIds=Nu&startTime=2019-11-01T11%3A50%3A00Z&endTime=2019-11-01T12%3A50%3A00Z"
    } ]
  } ]
}

Implementation status

As the SSD web service is currently under development, not all possible actions supported by FEWS have been implemented yet, Simple actions like switchToScadaPanel, openPdfFile and openUrl have been implemented first while less trivial actions (timeSeriesDisplay , spatialDisplay) are yet to be implemented, providing a working implementation to follow up on such actions in a web application requires more web based development.  For example, the idea is that a spatialDisplay action could provide a link to a FEWS WMS server context, and timeSeriesDisplay could be linked to a FEWS-PI webservice request that at least retrieves that time series data required to implement s 'similar' time series chart in the context of a web application.

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Installation

For general FewsWebServices requirements, see: Installation. There are no additional requirements for the FEWS SSD web service.

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