Setting tokens on a visualization click

Use predefined tokens to turn a dashboard experience from viewing to interactive discovery. Tokens capture information when a user clicks different visualization elements. You can then use the token elsewhere in the dashboard to control the data for a different visualization. Setting tokens on a visualization click updates associated inputs using the same token, but multiple inputs cannot set the same token.

Dashboard Studio supports three predefined tokens:

• name
• value
• row.<fieldname>.value

The following table represents the predefined token availability and how captured values vary according to visualization type.

Visualization	name	value	row.<fieldname>.value
splunk.area	Y-axis field name of the series/location clicked	Y-axis value of the series/location clicked	Value in the specified series corresponding to the location clicked
splunk.bar	Y-axis field name of the series/location clicked	Y-axis value of the series/location clicked	Value in the specified series corresponding to the location clicked
splunk.bubble	Y-axis field name of the series/location clicked	Y-axis value of the series/location clicked	Value in the specified series corresponding to the location clicked
splunk.column	Y-axis field name of the series/location clicked	Y-axis value of the series/location clicked	Value in the specified series corresponding to the location clicked
splunk.line	Y-axis field name of the series/location clicked	Y-axis value of the series/location clicked	Value in the specified series corresponding to the location clicked
splunk.map (Marker)	n/a	n/a	Value in the specified series corresponding to the location clicked
splunk.map (Bubble)	Name of the area clicked	Value of the area clicked	Value in the specified series corresponding to the location clicked
splunk.map (Choropleth)	Name of the area clicked	Value of the area clicked	Value in the specified series corresponding to the location clicked
splunk.scatter	Y-axis field name of the series/location clicked	Y-axis value of the series/location clicked	Value in the specified series corresponding to the location clicked
splunk.choropleth.svg	Name of the area clicked	Value of the area clicked	n/a
splunk.pie	Field name of the value clicked	Value of the location clicked	Value in the specified series corresponding to the location clicked
splunk.singlevalue	Field name of the majorValue	Value of the majorValue	n/a
splunk.singlevalueicon	Field name of the majorValue	Value of the majorValue	n/a
splunk.table	Field name of the cell clicked	Value of the cell clicked	Value in the specified series in the same row as the cell clicked

Setting tokens

1. Navigate to the Interactions section of the Configuration panel.
2. Click +Add Interaction
3. In the On Click dropdown, select Set Tokens
4. Click +Set Another Token
5. In the Set Token dropdown select either Use predefined token or Enter static value.
   1. A predefined token captures information to display dynamically
   2. A static value is a string
6. In the Create a name field, type a name for your token. Token names are used to reference the token elsewhere in the dashboard with the $token_name$ syntax
7. In the Choose an event field, select either name, value, or row.<fieldname>.value
   1. name is the field name of the value/location clicked
   2. value is the value of the location clicked
   3. row.<fieldname>.value is the value in the specified series corresponding to the location clicked
8. (Optional) In the Default Value field, enter a default value. For more details about default token values, see Default token.
9. Click Apply
10. Add your token to a search or visualization within your dashboard.

Default token

A token's default value exists for the moments before a user has interacted with a dashboard component. A token's value will change and update when users interact with dashboard elements. For example, a token can update when a user clicks on a visualization. Without a default token, a visualization will remain blank until a user interacts with a dashboard element associated with a token. Use default tokens to display data and prevent empty visualizations.

You can set a default token in the UI by navigating to the Interactions section of the Configuration panel and following the steps for setting a token. After setting your default, the defaults section of your dashboard definition updates with a tokens section. In the Configuration panel, you cannot specify a default value in the Set token section if a default value is already specified on an associated input using the same token.

The following is an example of a defaults section after a token receives a default setting.

"defaults": {
  "dataSources": {
    "ds.search": {
      "options": {
        "queryParameters": {
          "latest": "$global_time.latest$",
          "earliest": "$global_time.earliest$"
        }
      }
    }
  },
  "tokens": {
    "default": {
      "tokenName": {
        "value": "1986"
      }
    }
  }
},

To set default token values for inputs, see Adding and configuring inputs.

Token filters

Token filters ensure that you correctly capture the value of a token.

Filter	Description
Wrap value in quotes $token_name|s$	Ensures that quotation marks surround the value referenced by the token. Escapes all quotation characters, ", within the quoted value.
HTML format $token_name|h$	Ensures that the token value is valid for HTML formatting. Token values for the <HTML> element use this filter by default.
URL format $token_name|u$	Ensures that the token value is valid to use as a URL. Token values for the <link> element use this filter by default.
Specify no character escaping $token_name|n$	Prevents the default token filter from running. No characters in the token are escaped.

The following code snippet uses the |s filter to place quotation marks around the value returned from a token:

<search>
  <query>
    index=_internal sourcetype=$sourcetype_tok|s$ | timechart count by sourcetype
   </query>
</search>

If the value of sourcetype_tok is access_combined, it builds the following search string:

index=_internal sourcetype="access_combined" | timechart count by sourcetype

Example of setting a token

You can specify a token that passes along information between different visualizations. The following example shows two charts. One is a column chart that displays HTTP methods and their usage frequency, and the other is a pie chart that shows the analysis of HTTP response codes for a given HTTP method. When users click on a method in the column chart, the pie chart shows a breakdown of all response codes for the clicked method. The data connection between the two visualizations is achieved by setting up a token on the column chart $method$=row.method.value and passing the $method$ token to the search in the pie chart.

Source code

The following is a source code example of setting a token. Notice how the token is given the name method in the column chart's options and how that name is used in the token name syntax as $method$ in Search_2.

The example also sets the default value POST on the token method. Before any user clicks a visualization, a pie chart visualization will display the results for POST, preventing an empty visualization.

Notice the following stanzas:

• eventHandlers contains a token called method
• defaults contains a tokens stanza that sets the value POST on method
• viz_pie_chart contains a description that filters for $method$

{
  "visualizations": {
    "viz_column_chart": {
      "type": "splunk.column",
      "dataSources": {
        "primary": "ds_qBGlESX2"
      },
      "eventHandlers": [
        {
          "type": "drilldown.setToken",
          "options": {
            "tokens": [
              {
                "token": "method",
                "key": "row.method.value"
              }
            ]
          }
        }
      ],
      "showProgressBar": false,
      "showLastUpdated": false,
      "title": "HTTP Request Method"
    },
    "viz_pie_chart": {
      "type": "splunk.pie",
      "dataSources": {
        "primary": "ds_c8AfQapt"
      },
      "title": "Response Codes for Method $method$"
    }
  },
  "dataSources": {
    "ds_qBGlESX2": {
      "type": "ds.search",
      "options": {
        "query": "index=_internal \n| stats count by method"
      },
      "name": "Search_1"
    },
    "ds_c8AfQapt": {
      "type": "ds.search",
      "options": {
        "query": "index=_internal method=$method$\n| stats count by status"
      },
      "name": "Search_2"
    }
  },
  "defaults": {
    "dataSources": {
      "ds.search": {
        "options": {
          "queryParameters": {
            "latest": "$global_time.latest$",
            "earliest": "$global_time.earliest$"
          }
        }
      }
    },
    "tokens": {
      "default": {
        "method": {
          "value": "GET"
        }
      }
    }
  },
  "inputs": {
    "input_global_trp": {
      "type": "input.timerange",
      "options": {
        "token": "global_time",
        "defaultValue": "-24h@h,now"
      },
      "title": "Global Time Range"
    }
  },
  "layout": {
    "type": "grid",
    "options": {},
    "structure": [
      {
        "item": "viz_column_chart",
        "type": "block",
        "position": {
          "x": 0,
          "y": 0,
          "w": 600,
          "h": 400
        }
      },
      {
        "item": "viz_pie_chart",
        "type": "block",
        "position": {
          "x": 600,
          "y": 0,
          "w": 600,
          "h": 400
        }
      }
    ],
    "globalInputs": [
      "input_global_trp"
    ]
  },
  "description": "",
  "title": "Set Tokens on Click - Example"
}