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substitute_string
The substitute_string processor matches a key’s value against a regular expression and replaces all matches with a replacement string. substitute_string is a mutate string processor.
Configuration
The following table describes the options you can use to configure the substitue_string processor.
| Option | Required | Type | Description |
|---|---|---|---|
| entries | Yes | List | List of entries. Valid values are source, from, and to. |
| source | N/A | N/A | The key to modify. |
| from | N/A | N/A | The Regex String to be replaced. Special regex characters such as [ and ] must be escaped using \\ when using double quotes and \ when using single quotes. See Java Patterns for more information. |
| to | N/A | N/A | The String to be substituted for each match of from. |