Bio::DB::Failover - A Bio::DB::RandomAccessI compliant class which wraps a priority list of DBs $failover = Bio::DB::Failover->new(); $failover->add_database($db); # fail over Bio::DB::RandomAccessI.pm # this will check each database in priority, returning when # the first one succeeds $seq = $failover->get_Seq_by_id($id); This module provides fail over access to a set of Bio::DB::RandomAccessI objects Ewan Birney originally wrote this class.

Reporting Bugs
Report bugs to the Bioperl bug tracking system to help us keep track the bugs and their resolution. Bug reports can be submitted via email or the web: bioperl-bugs@bio.perl.org http://bugzilla.bioperl.org/ The rest of the documentation details each of the object methods. Internal methods are usually preceded with a _

add_database
Title : add_database Usage : add_database(%db) Function: Adds a database to the Returns : count of number of databases Args : hash of db resource name to Bio::DB::SeqI object

get_Seq_by_id
Title : get_Seq_by_id Usage : $seq = $db->get_Seq_by_id('ROA1_HUMAN') Function: Gets a Bio::Seq object by its name Returns : a Bio::Seq object Args : the id (as a string) of a sequence Throws : "id does not exist" exception

get_Seq_by_acc
Title : get_Seq_by_acc Usage : $seq = $db->get_Seq_by_acc('X77802'); Function: Gets a Bio::Seq object by accession number Returns : A Bio::Seq object Args : accession number (as a string) Throws : "acc does not exist" exception