FetchGridFS 2025.10.9.21¶
Bundle¶
org.apache.nifi | nifi-mongodb-nar
Description¶
Retrieves one or more files from a GridFS bucket by file name or by a user-defined query.
Tags¶
fetch, gridfs, mongo
Input Requirement¶
REQUIRED
Supports Sensitive Dynamic Properties¶
false
Properties¶
| Property | Description |
|---|---|
| gridfs-bucket-name | The GridFS bucket where the files will be stored. If left blank, it will use the default value ‘fs’ that the MongoDB client driver uses. |
| gridfs-client-service | The MongoDB client service to use for database connections. |
| gridfs-database-name | The name of the database to use |
| gridfs-file-name | The name of the file in the bucket that is the target of this processor. |
| gridfs-query | A valid MongoDB query to use to fetch one or more files from GridFS. |
| mongo-operation-mode | This option controls when results are made available to downstream processors. If Stream Query Results is enabled, provenance will not be tracked relative to the input flowfile if an input flowfile is received and starts the query. In Stream Query Results mode errors will be handled by sending a new flowfile with the original content and attributes of the input flowfile to the failure relationship. Streaming should only be used if there is reliable connectivity between MongoDB and NiFi. |
| mongo-query-attribute | If set, the query will be written to a specified attribute on the output flowfiles. |
Relationships¶
| Name | Description |
|---|---|
| failure | When there is a failure processing the flowfile, it goes to this relationship. |
| original | The original input flowfile goes to this relationship if the query does not cause an error |
| success | When the operation succeeds, the flowfile is sent to this relationship. |
Writes attributes¶
| Name | Description |
|---|---|
| gridfs.file.metadata | The custom metadata stored with a file is attached to this property if it exists. |