LICENSE

Copyright [1999-2015] Wellcome Trust Sanger Institute and the EMBL-European Bioinformatics Institute Copyright [2016-2024] EMBL-European Bioinformatics Institute

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NAME

Bio::EnsEMBL::Utils::SeqRegionCache - A shared LRU cache of information about seq_regions

SYNOPSIS

use Bio::EnsEMBL::DBSQL::DBAdaptor;

$db = Bio::EnsEMBL::DBSQL::DBAdaptor->new(...);

$seq_region_cache = $db->get_SeqRegionCache();

$key = "$seq_region_name:$coord_system_id";

$array = $seq_region_cache->{$key};

if ($array) {
  $name   = $array->[1];
  $length = $array->[3];
} else {
  # cache miss, get the info from the database
  # ...

  # cache the retrieved information
  $seq_region_cache->{$key} = [
    $seq_region_id,   $seq_region_name,
    $coord_system_id, $seq_region_length
  ];
}

DESCRIPTION

This module is simply a convenient place to put a cache of sequence region information which is shared by several adaptors for a given database.

METHODS