Mail::Mbox::MessageParser::Cache - A cache-based mbox folder reader

  #!/usr/bin/perl

  use Mail::Mbox::MessageParser;

  my $filename = 'mail/saved-mail';
  my $filehandle = new FileHandle($filename);

  # Set up cache
  Mail::Mbox::MessageParser::SETUP_CACHE(
    { 'file_name' => '/tmp/cache' } );

  my $folder_reader =
    new Mail::Mbox::MessageParser( {
      'file_name' => $filename,
      'file_handle' => $filehandle,
      'enable_cache' => 1,
    } );

  die $folder_reader unless ref $folder_reader;

  warn "No cached information"
    if $Mail::Mbox::MessageParser::Cache::UPDATING_CACHE;

  # Any newlines or such before the start of the first email
  my $prologue = $folder_reader->prologue;
  print $prologue;

  # This is the main loop. It's executed once for each email
  while(!$folder_reader->end_of_file());
  {
    my $email = $folder_reader->read_next_email();
    print $email;
  }

This module implements a cached-based mbox folder reader. It can only be used when cache information already exists. Users must not instantiate this class directly--use Mail::Mbox::MessageParser instead. The base MessageParser module will automatically manage the use of cache and non-cache implementations.

The following methods and functions are specific to the Mail::Mbox::MessageParser::Cache package. For additional inherited ones, see the Mail::Mbox::MessageParser documentation.

$ref = new( { 'file_name' => <mailbox file name>, 'file_handle' => <mailbox file handle>, });

    <file_name> - The full filename of the mailbox
    <file_handle> - An opened file handle for the mailbox

The constructor for the class takes two parameters. file_name is the filename of the mailbox. This will be used as the cache key, so it's important that it fully defines the path to the mailbox. The file_handle argument is the opened file handle to the mailbox. Both arguments are required.

Returns a reference to a Mail::Mbox::MessageParser object, or a string describing the error.

No known bugs.

Contact david@coppit.org for bug reports and suggestions.

David Coppit <david@coppit.org>.

This software is distributed under the terms of the GPL. See the file "LICENSE" for more information.

This code was originally part of the grepmail distribution. See http://grepmail.sf.net/ for previous versions of grepmail which included early versions of this code.

Mail::Mbox::MessageParser