| 1 |
package YAMLDB; |
| 2 |
use YAML qw/LoadFile DumpFile Dump/; |
| 3 |
use POSIX qw/strftime/; |
| 4 |
|
| 5 |
sub new { |
| 6 |
my ($class, %arg) = @_; |
| 7 |
|
| 8 |
my $self = bless { |
| 9 |
%arg, |
| 10 |
}, $class; |
| 11 |
|
| 12 |
$self->{last_check} = (-M $self->{db_file}) + 1; |
| 13 |
unless (-x $self->{db_file}) { |
| 14 |
DumpFile ($self->{db_file}, {}); |
| 15 |
} |
| 16 |
$self->check_maildb (); |
| 17 |
|
| 18 |
$self; |
| 19 |
} |
| 20 |
|
| 21 |
sub check_maildb { |
| 22 |
my ($self) = @_; |
| 23 |
|
| 24 |
if ($self->{last_check} > (-M $self->{db_file})) { |
| 25 |
$self->{last_check} = -M $self->{db_file}; |
| 26 |
|
| 27 |
my $maildb = eval { my $m = LoadFile ($self->{db_file}); return $m }; |
| 28 |
if ($@) { |
| 29 |
warn "ERROR when reading mail database $self->{db_file}: $@\n"; |
| 30 |
$self->{db_file} = $self->{db_file} . ".after_failure"; |
| 31 |
} else { |
| 32 |
$self->{maildb} = $maildb; |
| 33 |
} |
| 34 |
} |
| 35 |
} |
| 36 |
|
| 37 |
# This is not thread or multiprocess safe! |
| 38 |
# XXX: A second process will (of course) terribly damage the maildatabase |
| 39 |
# but i assume there wont be any second process. |
| 40 |
sub sync_maildb { |
| 41 |
my ($self) = @_; |
| 42 |
|
| 43 |
eval { |
| 44 |
DumpFile ("$self->{db_file}.tmp", $self->{maildb}); |
| 45 |
}; |
| 46 |
if ($@) { |
| 47 |
warn "ERROR when writing mail database $self->{db_file}.tmp: $@\n"; |
| 48 |
} else { |
| 49 |
rename "$self->{db_file}.tmp", $self->{db_file}; |
| 50 |
$self->{last_check} = -M $self->{db_file}; |
| 51 |
} |
| 52 |
} |
| 53 |
|
| 54 |
sub get { |
| 55 |
my ($self, $key) = @_; |
| 56 |
$self->check_maildb; |
| 57 |
$self->{maildb}->{$key}; |
| 58 |
} |
| 59 |
|
| 60 |
sub clear { |
| 61 |
my ($self, $key) = @_; |
| 62 |
$self->check_maildb; |
| 63 |
delete $self->{maildb}->{$key}; |
| 64 |
$self->sync_maildb; |
| 65 |
} |
| 66 |
|
| 67 |
sub set { |
| 68 |
my ($self, $key, $value) = @_; |
| 69 |
$self->check_maildb; |
| 70 |
$self->{maildb}->{$key} = $value; |
| 71 |
$self->sync_maildb; |
| 72 |
} |
| 73 |
1 |
