Pull Genome References
Source
This command uses the following file as the source for a list of Genome Reference instances:
ftp://ftp.ncbi.nlm.nih.gov/genomes/refseq/assembly_summary_refseq.txt
Threading & Synchronization
This command assumes that GenomeReference instances may already exist. Therefore, it is written to check for the existence of a GenomeReference by symbol before persisting a new instance. And since the command checks for the existence of previously persisted GenomeReference instances, multithreading is not used....avoiding race conditions.