NexusLIMS-Logger (GCP)
NexusLIMS-Logger is a desktop GUI logging user’s experiment session’s start and end time to define a concept of session. It is implemented using tkinter module of Python. It is supposed to run on instrument control PC which has internet access.
The functionality and interface are designed to be simple and easy to use. The user’s normal instrument operation behavior is not altered except:
start the NexusLIMS-Logger before operating the instrument.
leave NexusLIMS-Logger running during the operation of the instrument.
click the button on the NexusLIMS-Logger to close the session after the instrument operation is finished.
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The cloud based version has the database deployed on the cloud, and will transfer the raw data of the instrument to the cloud storage in the background.
Overview
NexusLIMS-Logger records the session information in MySQL DB, which is deployed on GCP ( Google Cloud Platform). The communication is through a thin web app layer wrapping necessary database transactions and exposing APIs. After the session is started, a file transfer thread starts. It watches file changes of the instrument output folders periodically and uploaded the file to the GCP cloud storage when there is difference detected. The difference is compared with the MD5 checksum of the file content. The NexusLIMS-Logger should have write access of the corresponding bucket on the cloud. When the session is closed by the user, NexusLIMS-Logger will record the timestamp and mark the status in the database. Additionally, the file transfer thread is stopped, and a final file transfer job is performed to ensure all data belonging to this session is transferred to the cloud storage.