Updates the content of a FlowFile by evaluating a Regular Expression against it and replacing the section of the content that matches the Regular Expression with some alternate value provided in a mapping file.


Text, Regular Expression, Update, Change, Replace, Modify, Regex, Mapping


In the list below, the names of required properties appear in bold. Any other properties (not in bold) are considered optional. The table also indicates any default values, and whether a property supports the Expression Language Guide.

Name Default Value Allowable Values Description
Regular Expression \S+ The Regular Expression to search for in the FlowFile content
Supports Expression Language: true
Matching Group 0 The number of the matching group of the provided regex to replace with the corresponding value from the mapping file (if it exists).
Supports Expression Language: true
Mapping File The name of the file (including the full path) containing the Mappings.
Mapping File Refresh Interval 60s The polling interval in seconds to check for updates to the mapping file. The default is 60s.
Character Set UTF-8 The Character Set in which the file is encoded
Maximum Buffer Size 1 MB Specifies the maximum amount of data to buffer (per file) in order to apply the regular expressions. If a FlowFile is larger than this value, the FlowFile will be routed to 'failure'


Name Description
failure FlowFiles that could not be updated are routed to this relationship
success FlowFiles that have been successfully updated are routed to this relationship, as well as FlowFiles whose content does not match the given Regular Expression

Reads Attributes:

None specified.

Writes Attributes:

None specified.