Unsupported layer className OpenLayers.Layer.Vector

[jirik]

[2021-07-01 07:34:41,670: WARNING/ForkPoolWorker-2] [2021-07-01 07:34:41,669] INFO in celery: PRE task=layman.map.filesystem.thumbnail.refresh, workspace=jan_vrobel, publication_name=nah2
[2021-07-01 07:34:41,669: INFO/ForkPoolWorker-2] PRE task=layman.map.filesystem.thumbnail.refresh, workspace=jan_vrobel, publication_name=nah2
[2021-07-01 07:34:41,678: WARNING/ForkPoolWorker-2] [2021-07-01 07:34:41,677] INFO in thumbnail: Timgen URL: http://timgen:8080/?map_def_url=http%3A%2F%2Flayman%3A8000%2Frest%2Fworkspaces%2Fjan_vrobel%2Fmaps%2Fnah2%2Ffile&gs_url=http%3A%2F%2Flayman%3A8000%2Fgeoserver%2F&gs_public_url=https%3A%2F%2Fexample.com%2Fgeoserver%2F&editor=jan_vrobel&proxy_header=a0468616f9968eaecdc3377988aba650
[2021-07-01 07:34:41,677: INFO/ForkPoolWorker-2] Timgen URL: http://timgen:8080/?map_def_url=http%3A%2F%2Flayman%3A8000%2Frest%2Fworkspaces%2Fjan_vrobel%2Fmaps%2Fnah2%2Ffile&gs_url=http%3A%2F%2Flayman%3A8000%2Fgeoserver%2F&gs_public_url=https%3A%2F%2Fexample.com%2Fgeoserver%2F&editor=jan_vrobel&proxy_header=a0468616f9968eaecdc3377988aba650
[2021-07-01 07:34:43,924: WARNING/ForkPoolWorker-2] [2021-07-01 07:34:43,923] INFO in thumbnail: waiting for entries
[2021-07-01 07:34:43,923: INFO/ForkPoolWorker-2] waiting for entries
[2021-07-01 07:34:44,431: WARNING/ForkPoolWorker-2] [2021-07-01 07:34:44,431] INFO in thumbnail: browser entry {'level': 'SEVERE', 'message': 'http://timgen:8080/code.aa4d8b38.js 595:1871 "Unsupported layer className OpenLayers.Layer.Vector"', 'source': 'console-api', 'timestamp': 1625124884428}
[2021-07-01 07:34:44,431: INFO/ForkPoolWorker-2] browser entry {'level': 'SEVERE', 'message': 'http://timgen:8080/code.aa4d8b38.js 595:1871 "Unsupported layer className OpenLayers.Layer.Vector"', 'source': 'console-api', 'timestamp': 1625124884428}
[2021-07-01 07:34:44,432: WARNING/ForkPoolWorker-2] [2021-07-01 07:34:44,432] INFO in thumbnail: browser entry {'level': 'SEVERE', 'message': "http://timgen:8080/code.aa4d8b38.js 341:2520 Uncaught TypeError: Cannot read property 'getLayerStatesArray' of undefined", 'source': 'javascript', 'timestamp': 1625124884428}
[2021-07-01 07:34:44,432: INFO/ForkPoolWorker-2] browser entry {'level': 'SEVERE', 'message': "http://timgen:8080/code.aa4d8b38.js 341:2520 Uncaught TypeError: Cannot read property 'getLayerStatesArray' of undefined", 'source': 'javascript', 'timestamp': 1625124884428}
[2021-07-01 07:34:44,432: WARNING/ForkPoolWorker-2] [2021-07-01 07:34:44,432] INFO in thumbnail: browser entry {'level': 'SEVERE', 'message': "http://timgen:8080/code.aa4d8b38.js 174:342 Uncaught TypeError: Cannot read property 'ol_uid' of undefined", 'source': 'javascript', 'timestamp': 1625124884428}
[2021-07-01 07:34:44,432: INFO/ForkPoolWorker-2] browser entry {'level': 'SEVERE', 'message': "http://timgen:8080/code.aa4d8b38.js 174:342 Uncaught TypeError: Cannot read property 'ol_uid' of undefined", 'source': 'javascript', 'timestamp': 1625124884428}
[2021-07-01 07:34:44,558: INFO/ForkPoolWorker-2] Task layman.map.filesystem.thumbnail.refresh[6dd63673-5e06-4b09-8427-d4e03f62df5e] succeeded in 2.8893764168024063s: None

[jirik]

Currently, Layman intentionally supports to show only WMS layers in map thumbnail:

layman/timgen/src/map.js

Line 134 in 51c6714

case "HSLayers.Layer.WMS":

When Timgen is iterating through layers, it map other layers to undefined:

layman/timgen/src/map.js

Line 151 in 51c6714

return layers_json.map(lj => json_to_layer(lj, gs_public_url, gs_url, headers));

And then, it adds each mapped value to the map as layer:

layman/timgen/src/map.js

Line 188 in 51c6714

const layers = json_to_layers(map_json.layers, gs_public_url, gs_url, headers);

And that's probably reason of "Uncaught TypeError" messages, because OpenLayers can not add "undefined" layer to the map.

@index-git
To fix this, it could work to change

  const layers = json_to_layers(map_json.layers, gs_public_url, gs_url, headers);
  layers.forEach(layer => {
    ol_map.addLayer(layer);
  });

to

  const layers = json_to_layers(map_json.layers, gs_public_url, gs_url, headers);
  layers.forEach(layer => {
    if(layer) {
      ol_map.addLayer(layer);
    }
  });

[jirik]

Also in such situations when {'level': 'SEVERE', ... 'source': 'javascript', ...} appear or thumbnail is not generated, the celery task should probably raise an exception.