question: public void backupWorkspace ( final String workspaceId , final String srcPath , final String srcAddress ) throws ServerException { ReentrantLock lock = workspacesBackupLocks . get ( workspaceId ) ; if ( lock != null ) { if ( lock . tryLock ( ) ) { try { if ( workspacesBackupLocks . get ( workspaceId ) == null ) { return ; } backupWorkspace ( workspaceId , srcPath , srcAddress , false ) ; } finally { lock . unlock ( ) ; } } } else { LOG . warn ( "Attempt to backup workspace {} after cleanup" , workspaceId ) ; } }
target:  Copies workspace files from machine's host to backup storage.