Customization

This topic describes how to use the servers.json file to define the default connection behavior in Heavy Immerse. It describes how to enable default behavior using servers.json, provides basic syntax, and includes examples. You can define the HEAVY.AI database to connect to, as well as the username and password. You can also configure Immerse to use additional tile sources for geo charts.
Editing heavy.conf to Enable servers.json
To enable default behavior through a servers.json file, you must first edit heavy.conf to include servers.json information:
1.In your HEAVYAI_STORAGE directory, open heavy.conf. For information about heavy.conf and available options, see Configuration Parameters.
2.In the [web] section of heavy.conf, reference servers.json by adding the following line:
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servers-json = "/servers.json"
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Replace with the full path to servers.json.
3.Save heavy.conf.
servers.json File Properties
Property
Description
"database": "<database_name>"
The name of the database that Immerse connects to by default.
"host": "<hostname>"
Name of the database host.
"loadDashboard": "<id>"
ID number of the Immerse dashboard to load on login.
"login_panel_databases" : [ "database_1", "database_2", "database_3" ]
Dropdown menu of databases to select at login.
Note: If you also provide the database key, it should be one of the databases listed in login_panel_databases, which is then selected by default.
"password": "<password>"
Immerse user password.
"port": "<port_number>"
Port used for connecting to the database host.
"protocol": "<protocol>"
Connection protocol to use: http or https.
"url": "<URL>"
Universal resource locator. Defines the path to the source database. Can be used as an alternative to identifying host and protocol.
"username": "<username>"
Name of the Immerse user.
"offline": true
Set to true to help Immerse identify an offline environment and show a basemap (countries boundary geojson polygons) for Geo charts. Otherwise, Immerse shows Mapbox basemaps and any custom basemaps you have defined.
"enableJupyter": <boolean>
Set to true to enable Jupyter features in Immerse. For more information, see JupyterLab Installation and Configuration.
"SAMLUrl": "<url>"
Enable SAML in Immerse. The URL value is Identify Provider Single Sign-On URL. For more information about configuring SAML, see Connecting to HEAVY.AI Using SAML.
"customStyles": "<[options]>"
Productize Immerse by customizing colors, login text, logo, and other UI elements. For more information, see Enable Custom Styles.
"mapboxCustomStyles": "<[options]>"
Specify and use basemap styles other than those provided with Immerse. For more information, see Enable Custom Basemap Styles for Geo Charts.
Configuring Data Source and User Login Credentials
You can create a servers.json file to control the default configuration when you log in to Heavy Immerse. The information in servers.json can identify the database you connect to and credentials to use during automatic login.
1.If servers.json does not exist yet, create a file by that name in the HEAVYAI_STORAGE directory.
2.In servers.json, specify the database to connect to, as well as username and password information. You can use host, port, and protocol to specify the path to the data:
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[
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   {
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          "database": "<database_name>",
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          "port": "<port_number>",
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          "host": "<hostname>",
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          "protocol": "<protocol>",
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          "username": "<username>",
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          "password": "<password>"
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        }
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]
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Alternatively, you can define the data source using a URL:
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[
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   {
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          "database": "<database_name>",
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          "url": "<URL>",
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          "username": "<username>",
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          "password": "<password>"
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        }
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]
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3.Save servers.json.
If you leave the option values blank, the Immerse login form loads with blank fields.
The contents of servers.json must be formatted as an array.
Feature Flags
The feature_flags section lets you set global default settings for the Immerse user interface.
Element
Description
"ui/dashboard_tabs": <boolean>
Set to true to enable the tabbed interface for dashboards. Tabbed interface is enabled by default (true).
"ui/default_filter_panel_open": <boolean>
Set to determine whether the filter panel is open. Filter panel is closed by default (false).
"ui/default_simple_filters": <boolean>
Set to determine if the filter panel opens in simple mode; off (false) by default. To set the filter panel to open in simple mode, set to true.
"ui/default_theme": "light" | "dark"
Set the default Immerse theme for all users.
If a user has defined their own theme, that theme is used for that user's instance.
If a user has not specified a theme, but the default theme is set in servers.json, that default theme is used.
If no default theme is set, the system default is dark mode.
"ui/enable_auto_dashboard_refresh": <boolean>
Set to true to enable dashboard Auto Refresh dropdown dialog (default). When set to false, the Refresh button is still available, but the Auto Refresh dropdown option is unavailable.  
"ui/enable_brush_filter_edits_from_chart": <boolean>
Set to true to enable editing of Combo chart brush ranges through text input in the upper-right corner of the chart. Disabled by default (false).
"ui/enable_data_catalog": <boolean>
Control whether the Data Catalog is enabled in Immerse. The value is true by default. Set the value to false to disable and hide the Data Catalog.
"ui/enable_linked_zoom": <boolean>
Linked zoom is disabled by default (false). Set to true to enable linked zoom. Enabling linked zoom can impact performance.
"ui/enable_map_exports": <boolean>
Set to true to enable geoJSON and CSV export for Choropleth, Linemap, and Pointmap charts. Disabled by default (false).
"ui/enable_new_combo_chart": <boolean>
Controls whether the New Combo chart is available in Chart Editor, and also controls whether Duplicate as New Combo is available. true by default. Set to false to disable New Combo charts.
"ui/enable_unrestricted_
percentage_view_pie_chart": <boolean>
By default (false), Pie chart percentage labels and All Others slice options can only be toggled on for a # Records or SUM() aggregate. Set to true to allow percentage labels to be toggled on or off for any aggregate value in a Pie chart.
"ui/geojoined-bounding-boxes":<boolean>
When a Choropleth chart is created with a geojoined table, by default (false) the bounding box of the geo table does not affect the fact table. If you pan or zoom on the Choropleth chart, other charts on the fact table are not affected.
​
Set to true for panning and zooming on a geojoined Choropleth chart to affect other charts on the fact table.
"ui/map_export_limit": <number>
Sets the limit for rows exported in map charts. Default: 100,000.
"ui/pointmap_default_points": <number>
Sets the default limit for pointmap points. Must be between 1000 and the value set in pointmap_max_points. Default: 10,000,000.
"ui/pointmap_max_points": <number>
Sets the maximum number of points on a pointmap. Must be greater than 1000. Default: 10,000,000.
"ui/restricted_viewing": <boolean>
Adds additional restrictions to the VIEW-only experience. If set to true, a user with VIEW-only access to a dashboard and no EDIT privileges cannot add new charts or modify existing charts. Default: false.
"ui/shift_to_zoom": <boolean>
Set to true to require that the Shift key be held down for pan/zoom actions on Combo and Map charts. By default, the Shift key is not required (false).
"ui/show_ui_config_panel": <boolean>
Controls visibility of the UI Settings panel for non-superusers. Panel is available by default (true). Set to false to make the panel unavailable.
"ui/show_ui_config_panel_axis_trunc": <boolean>
Controls visibility of Label defaults in the UI Settings panel for non-superusers. Label defaults is available by default (true). Set to false to make Label defaults unavailable.
Enable Custom Styles
To productize Immerse, you can add the customStyles JSON object to servers.json. Use the customStyles elements to:
Customize colors
Customize the text displayed in the browser tab
Add your own logo
Customize the login text
Disable the Help menu dropdown on the navigation bar
JSON Branding Elements
Element
Description
buttonPrimaryColor
Button color when inactive
buttonSecondaryHighlightColor
Button color when hovering.
colors
Hexadecimal color definitions used in charts.
custom
Custom colors, requires 11 or more colors. These are the options available in the Color by Dimension pop-up.
darkThemeLogoURL
URL to your dark mode logo. You can set different logos for light and dark mode. If no dark mode logo is configured, the logo defined in logoURL is used for both light and dark mode.
Must be a browser-accessible http(s) URL, not a file system path.
disableHelpMenu
Set to true to disable Help dropdown on the navigation bar.
​
​
loginText
Specify custom text for the Immerse login page.
logoURL
URL to your logo. You can set different logos for light and dark mode. If a dark mode logo is configured in darkThemeLogoURL, the logo defined in logoURL is used for light mode only. If no dark mode logo is configured, the logo defined in logoURL is used for both light and dark mode.
Must be a browser-accessible http(s) URL, not a file system path.
ordinal
4 scales, 1 or more colors each scale. Defines a range of colors that measures iterate through repeatedly. The size of the range can vary.
quantitative
4 scales, 1 or more colors each scale. Quantitative measures produce smooth, continuous gradients between each "stopping point" defined in the list of colors, in order.
secondaryButtonColor
Button color when pressed.
solid
Solid colors, requires 8 or more colors. All measures are assigned one color. The array of colors you provide defines which colors are available.
title
Text displayed in the browser tab.
Notes
You can also set fonts and colors in the Immerse UI Settings panel. For more information, see Configuring the Dashboard User Interface.
There are no visual design guarantees when using a large number of colors. For example, visual elements might bleed beyond borders or have an unexpected layout.
Custom styles do not affect the settings for charts or dashboards saved before the custom styles are defined. However, you can edit existing charts and replace the colors in use to colors in your custom palette.
Full servers.json Example
The following example shows a complete servers.json file that includes customization. When you want to change any of the settings in servers.json, you must replace all settings in servers.json, even if you duplicate the default values.
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[
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{
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   "database": "heavyai",
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   "url": "localhost",
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   "port": "6273",
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   "username": "admin",
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   "password": "HyperInteractive",
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   "feature_flags": {
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      "ui/default_theme": "light"
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   },
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   "customStyles": {
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      "logoURL": "http://www.heavyai.com/docs/latest/images/3_panda.png",
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      "loginText": "Log in to Panda Bear Wear Ware",
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      "title": "Where Panda Bear Wear Ware Wearers Dare Care",
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      "buttonPrimaryColor": "#888888",
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      "buttonSecondaryColor": "#444444",
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      "buttonSecondaryHighlightColor": "#000000",
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      "colors": {
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        "solid": [
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           "#333333",
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           "#555555",
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           "#777777",
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           "#999999",
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           "#aaaaaa",
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           "#cccccc",
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           "#eeeeee",
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           "#ffffff"
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        ],
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        "custom": [
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           "#000000",
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           "#eeeeee",
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           "#222222",
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           "#cccccc",
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           "#444444",
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           "#bbbbbb",
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           "#666666",
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           "#aaaaaa",
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           "#333333",
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           "#dddddd",
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           "#111111"
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        ],
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        "ordinal": [
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           [
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              "#111111",
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              "#cccccc"
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           ],
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           [
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              "#111111",
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              "#777777",
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              "#cccccc"
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           ],
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           [
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              "#111111",
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              "#555555",
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              "#999999",
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              "#bbbbbb",
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              "#eeeeee"
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           ],
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           [
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              "#111111",
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              "#333333",
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              "#555555",
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              "#777777",
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              "#999999",
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              "#bbbbbb",
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              "#dddddd",
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              "#eeeeee"
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           ]
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        ],
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        "quantitative": [
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           [
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              "#555555",
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              "#cccccc"
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           ],
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           [  "#111111",
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              "#eeeeee"
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           ]
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        ]
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      }
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   }
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}
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]
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This example is for the totally-not-made-up company Panda Bear Wear Ware, where you can find all of your Panda Bear Wear Ware in one lair with time to spare. There is an understandable predilection toward black, white and everything in between on their color palette.
The first section contains branding information for their Heavy Immerse instance.
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"logoURL": "http://www.heavyai.com/docs/latest/images/3_panda.png",
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"loginText": "Log in to Panda Bear Wear Ware",
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"title": "Where Panda Bear Wear Ware Wearers Dare Care",
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"buttonPrimaryColor": "#888888",
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"buttonSecondaryColor": "#444444",
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"buttonSecondaryHighlightColor": "#000000",
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The logo, labeling, and button colors are visible at the dashboard level.
The Solid palette colors all items in Line, Pie, Bar, and other charts with one color. You can define the array of available colors.
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      "colors": {
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        "solid": [
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           "#333333",
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           "#555555",
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           "#777777",
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           "#999999",
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           "#aaaaaa",
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           "#cccccc",
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           "#eeeeee",
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           "#ffffff"
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        ],
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The Ordinal palette defines a range of colors that are iterated repeatedly in a chart with many values. You can define multiple ranges from which to select.
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"        ordinal": [
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           [
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              "#111111",
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              "#cccccc"
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           ],
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           [
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              "#111111",
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              "#777777",
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              "#cccccc"
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           ],
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           [
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              "#111111",
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              "#555555",
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              "#999999",
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              "#bbbbbb",
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              "#eeeeee"
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           ],
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           [
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              "#111111",
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              "#333333",
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              "#555555",
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              "#777777",
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              "#999999",
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              "#bbbbbb",
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              "#dddddd",
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              "#eeeeee"
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           ]
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        ],
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For example, a Pie chart can cycle through colors on the Ordinal palette to color each segment.
The Custom palette populates the Custom and Color By Dimension pop-ups, allowing you to assign specific colors to one or more values.
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        "custom": [
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           "#000000",
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           "#eeeeee",
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           "#222222",
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           "#cccccc",
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           "#444444",
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           "#bbbbbb",
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           "#666666",
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           "#aaaaaa",
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           "#333333",
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           "#dddddd",
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           "#111111"
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        ],
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The Quantitative palette gives a range of two or more colors. Values are expressed as a gradient on a continuum between the colors you define. You can create multiple value sets.
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        "quantitative": [
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           [
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              "#555555",
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              "#cccccc"
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           ],
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           [  "#111111",
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              "#eeeeee"
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           ]
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        ]
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Enable Custom Basemap Styles for Geo Charts
If you work extensively with geospatial data, you might need to use basemap styles that are different than those provided by Immerse. By modifying servers.json, you can use custom map styles created with Mapbox Studio, as well as third-party OGC-compliant raster tile sources.
To use different basemap styles, add the mapboxCustomStyles property, and then define the source.
Note: Entering a source incorrectly can result in unexpected behavior in the geo charts, or cause Immerse to not load. Make sure that mapboxCustomStyles is an array, and that the objects in the array have label and value properties. To avoid errors, consider using a JSON validator like JSON Lint to make sure the code is correctly formatted before starting Immerse.
The following example syntax shows how to add custom base maps using the mapboxCustomStyles property, in the following order:
A custom map style created in Mapbox Studio and hosted on mapbox.com.
A basemap style hosted on a Mapbox Atlas Server.
A third-party OGC-compliant raster tiles source not affiliated with Mapbox. This source must adhere to the Mapbox Style Specification.
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[
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  {
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        "database": "<database>",
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        "password": "<password>",
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        "url": "<heavyaiserver>",
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        "port": "<port_number>",
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        "username": "<username>",
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        "mapboxCustomStyles": [
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          {
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                "label": "custom-mapbox-studio-source",
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                "value": "mapbox://styles/heavyai/<mapbox-studio-style-id>"
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          },
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          {
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                "label": "mapbox-atlas-source",
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                "value": "http://<domain>:<port>/pages/<style_name>/<style_name>.json"
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          },
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          {
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                "label": "3rd-party-raster-source",
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                "value": {
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                  "version": 8,
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                  "sources": {
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                          "openstreetmap": {
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                                  "type": "raster",
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                                  "tiles": [
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                                          "http://a.tile.openstreetmap.org/{z}/{x}/{y}.png",
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                                          "http://b.tile.openstreetmap.org/{z}/{x}/{y}.png"
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                                  ],
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                                  "tileSize": 256
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                          }
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                  },
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                  "layers": [{
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                          "id": "openstreetmap",
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                          "type": "raster",
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                          "source": "openstreetmap",
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                          "minzoom": 0,
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                          "maxzoom": 22
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                  }]
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                }
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          }
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        ]
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  }
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]
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