Transformer: Metadata Cleaner

Cleans LemnaTec Metadata to allow easier processing by other transformers

Overview

This transformer is different than most in that it's specialized for cleaning the Gantry metadata. This requires the transformer to also have its own transformer_class.Transformer instance for special parameter handling.

Parameters

There are two additional parameters for this transformer: sensor, and userid.

The sensor parameter is required and refers to the gantry sensor the metadata is associated with.

The userid parameter is optional and allows additional identification information to be stored with the cleaned metadata.

Sample Docker Command line

Below is a sample command line that shows how the metadata cleaner Docker image could be run. An explanation of the command line options used follows. Be sure to read up on the docker run command line for more information.

docker run --rm --mount "src=/home/test,target=/mnt,type=bind" -e "BETYDB_URL=https://terraref.ncsa.illinois.edu/bety/" -e "BETYDB_KEY=<key value>" agpipeline/cleanmetadata:2.0 --working_space "/mnt" --metadata "/mnt/08f445ef-b8f9-421a-acf1-8b8c206c1bb8_metadata.json" "stereoRGB"

This example command line assumes the source files are located in the /home/test folder of the local machine. The name of the image to run is agpipeline/cleanmetadata:2.0.

We are using the same folder for the source metadata and the cleaned metadata. By using multiple --mount options, the source and output files can be separated.

Docker commands
Everything between 'docker' and the name of the image are docker commands.

• run indicates we want to run an image
• --rm automatically delete the image instance after it's run
• --mount "src=/home/test,target=/mnt,type=bind" mounts the /home/test folder to the /mnt folder of the running image
• -e "BETYDB_URL=https://terraref.ncsa.illinois.edu/bety/" the URL to the BETYdb instance to fetch experiment, and other data, from
• -e "BETYDB_KEY=<key value>" the key associated with the BETYdb URL (replace <key value> with value of your key)

We mount the /home/test folder to the running image to make available the file to the software in the image.

Image's commands
The command line parameters after the image name are passed to the software inside the image. Note that the paths provided are relative to the running image (see the --mount option specified above).

• --working_space "/mnt" specifies the folder to use as a workspace
• --metadata "/mnt/08f445ef-b8f9-421a-acf1-8b8c206c1bb8_metadata.json" is the name of the source metadata to be cleaned
• "stereoRGB" is the name of the sensor the metadata is associated with