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elmex |
1.1 |
package YAMLDB; |
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use YAML qw/LoadFile DumpFile Dump/; |
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use POSIX qw/strftime/; |
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sub new { |
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my ($class, %arg) = @_; |
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my $self = bless { |
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%arg, |
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}, $class; |
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$self->{last_check} = (-M $self->{db_file}) + 1; |
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unless (-x $self->{db_file}) { |
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DumpFile ($self->{db_file}, {}); |
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} |
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$self->check_maildb (); |
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$self; |
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} |
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sub check_maildb { |
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my ($self) = @_; |
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if ($self->{last_check} > (-M $self->{db_file})) { |
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$self->{last_check} = -M $self->{db_file}; |
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my $maildb = eval { my $m = LoadFile ($self->{db_file}); return $m }; |
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if ($@) { |
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warn "ERROR when reading mail database $self->{db_file}: $@\n"; |
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$self->{db_file} = $self->{db_file} . ".after_failure"; |
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} else { |
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$self->{maildb} = $maildb; |
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} |
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} |
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} |
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# This is not thread or multiprocess safe! |
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# XXX: A second process will (of course) terribly damage the maildatabase |
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# but i assume there wont be any second process. |
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sub sync_maildb { |
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my ($self) = @_; |
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eval { |
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DumpFile ("$self->{db_file}.tmp", $self->{maildb}); |
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}; |
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if ($@) { |
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warn "ERROR when writing mail database $self->{db_file}.tmp: $@\n"; |
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} else { |
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rename "$self->{db_file}.tmp", $self->{db_file}; |
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$self->{last_check} = -M $self->{db_file}; |
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} |
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} |
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sub get { |
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my ($self, $key) = @_; |
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$self->check_maildb; |
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$self->{maildb}->{$key}; |
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} |
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sub clear { |
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my ($self, $key) = @_; |
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$self->check_maildb; |
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delete $self->{maildb}->{$key}; |
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$self->sync_maildb; |
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} |
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sub set { |
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my ($self, $key, $value) = @_; |
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$self->check_maildb; |
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$self->{maildb}->{$key} = $value; |
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$self->sync_maildb; |
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} |
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