CKAN Previewer

A previewer that plugs into CKAN is also included in this project in the cesiumpreview folder.

###To create a CKAN installation

Install a local instance of CKAN per http://docs.ckan.org/en/ckan-2.0/install-from-source.html Follow all the steps :

• In step 1 install openjdk-7-jdk instead of openjdk-6-jdk
• in step 2c use requirements.txt instead of pip-requirements.txt
• In step 3 making 'pass' your password will makes things simpler
• Set up the optional Solr install as per step 5 (Single Solr instance)
• Step 6 can take a long time. If it does fail drop the ckan_default database and redo step 3 and try again
• You do no need to set up the optional DataStore install as per step 7

To add local storage of files

sudo mkdir -p /var/lib/ckan/default
sudo chmod 777 /var/lib/ckan/default

in development.ini under storage settings add

nano /etc/ckan/default/development.ini
ckan.storage_path = /var/lib/ckan/default

And to run the server

. /usr/lib/ckan/default/bin/activate
cd /usr/lib/ckan/default/src/ckan
paster serve /etc/ckan/default/development.ini

To install spatial extension for spatial queries and previewers, see http://docs.ckan.org/projects/ckanext-spatial/en/latest/install.html

###To make sysadmin account

paster sysadmin add admin -c /etc/ckan/default/development.ini

###To add Cesium Previewer

Make a virtual link to the viewer in CKAN to the cesiumviewer.

ln -s ~/ausglobe/cesiumpreview ~/ckan/lib/default/src/ckan/ckanext/cesiumpreview

In the CKAN development.ini under storage settings add the plugin

nano /etc/ckan/default/development.ini
ckan.plugins = cesium_viewer ...

There may be a more automatic way to do this, but I'm just patching files in CKAN to handle the cesium previewer in the same way as the recline previewer. So first open setup.py for editing.

nano ~/ckan/lib/default/src/ckan/setup.py

And add the following line under the recline_preview plugin entry (line ~76)

 'cesium_preview = ckanext.reclinepreview.plugin:CesiumPreview',

Then patch entry_points.txt

  nano ~/ckan/lib/default/src/ckan/ckan.egg-info/entry_points.txt

And add the following line under the recline_preview plugin entry (line ~76)

  cesium_preview = ckanext.cesiumpreview.plugin:CesiumPreview   

That should be it. The cesium previewer is pointing to the instance at nationalmap.research.nicta.com.au. If you need to update the cesium_previewer path to a different location then edit the vis_server variable in preview_cesium.js

  nano ~/ausglobe/cesiumpreview/theme/public/preview_cesium.js

If all went correctly you should be able to start the CKAN server in virtualenv and access the server at http://127.0.0.1:5000/

To test the Cesium Previewer

...