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package Pye::MongoDB; |
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# ABSTRACT: Log with Pye on top of MongoDB |
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use version; |
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use Carp; |
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use MongoDB; |
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use MongoDB::Code; |
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use Role::Tiny::With; |
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use Tie::IxHash; |
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our $VERSION = "1.000001"; |
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$VERSION = eval $VERSION; |
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with 'Pye'; |
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our $NOW = MongoDB::Code->new(code => 'function() { return new Date() }'); |
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=head1 NAME |
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Pye::MongoDB - Log with Pye on top of MongoDB |
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=head1 SYNOPSIS |
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use Pye::MongoDB; |
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my $pye = Pye::MongoDB->new( |
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host => 'mongodb://logserver1:27017,logserver2:27017', |
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find_master => 1, |
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database => 'log_db', |
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collection => 'myapp_log' |
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); |
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# now start logging |
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$pye->log($session_id, "Some log message", { data => 'example data' }); |
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# inspect the logs from the command line |
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pye -b MongoDB -d log_db -c myapp_log |
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=head1 DESCRIPTION |
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This package provides a MongoDB backend for the L<Pye> logging system. This is |
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currently the easiest backend to use, since no setup is needed in order to start |
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logging with it. |
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Messages will be stored in a MongoDB database with the following keys: |
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=over |
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=item * C<session_id> - the session ID, a string, always exists |
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=item * C<date> - the date the messages was logged, in ISODate format, always exists |
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=item * C<text> - the text of the message, a string, always exists |
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=item * C<data> - supplemental JSON structure, optional |
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=back |
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An index on the C<session_id> field will automatically be created. |
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=head2 NOTES AND RECOMMENDATIONS |
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As of this writing (MongoDB v2.6), MongoDB is kind of a storage guzzler. You might |
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find it useful to create a TTL index on the log collection. For example, the following |
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line (entered into the C<mongo> shell) will create a time-to-live index of 2 days |
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on a log collection: |
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db.log_collection.ensureIndex({ date: 1 }, { expireAfterSeconds: 172800 }) |
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Alternatively, you could make the collection capped and limit it by size. Note, however, |
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that the _remove_session_logs() method will not work in that case. |
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Also, consider using TokuMX as a drop-in replacement for MongoDB. It it faster, uses |
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much less storage space and supports ACID transactions. |
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=head2 USING THE pye COMMAND LINE UTILITY |
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The L<pye> command line utility, used to inspect logs, provides all command line options |
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to the L<new( [ %options ] )> constructor, which in turn passes anything to L<MongoDB::MongoClient>. |
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This means that if your database has replication, or requires authentication, you can |
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provide these options from the command line. |
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For example: |
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pye -b MongoDB |
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--host mongodb://server1:27017,server2:27017 |
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--find_master=1 |
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-d log_db |
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-c myapp_log |
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--username log_user |
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--password very_secret |
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C<host>, C<find_master>, C<username> and C<password> in this example will be passed to C<MongoDB::MongoClient>. |
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=head1 CONSTRUCTOR |
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=head2 new( [ %options ] ) |
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Create a new instance of this class. All options are optional. |
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=over |
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=item * database - the name of the database, defaults to "logs" |
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=item * collection (or table) - the name of the collection, defaults to "logs" |
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=item * be_safe - whether to enable the C<safe> flag when inserting log messages, |
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defaults to a false value |
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=back |
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Any other option you provide will be passed to L<MongoDB::MongoClient>, so pass anything |
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needed in order to connect to the database server (such as C<host>, C<find_master>, etc.). |
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=cut |
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sub new { |
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my ($class, %opts) = @_; |
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my $db_name = delete($opts{database}) || 'logs'; |
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my $coll_name = delete($opts{collection}) || delete($opts{table}) || 'logs'; |
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my $safety = delete($opts{be_safe}) || 0; |
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# use the appropriate mongodb connection class |
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# depending on the version of the MongoDB driver |
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# installed |
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my $conn = version->parse($MongoDB::VERSION) >= v0.502.0 ? |
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MongoDB::MongoClient->new(%opts) : |
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MongoDB::Connection->new(%opts); |
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my $db = $conn->get_database($db_name); |
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my $coll = $db->get_collection($coll_name); |
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$coll->ensure_index({ session_id => 1 }); |
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return bless { |
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db => $db, |
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coll => $coll, |
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safety => $safety |
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}, $class; |
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} |
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=head1 OBJECT METHODS |
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The following methods implement the L<Pye> role, so you should refer to C<Pye> |
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for their documentation. Some methods, however, have some MongoDB-specific notes, |
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so keep reading. |
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151
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=head2 log( $session_id, $text, [ \%data ] ) |
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If C<\%data> is provided, this module will traverse it recursively, replacing any |
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hash-key that contains dots with semicolons, as MongoDB does not support dots in |
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field names. |
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=cut |
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159
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sub log { |
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my ($self, $sid, $text, $data) = @_; |
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my $date = $self->{db}->eval($NOW); |
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164
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my $doc = Tie::IxHash->new( |
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session_id => "$sid", |
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date => $date, |
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text => $text, |
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); |
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if ($data) { |
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# make sure there are no dots in any hash keys, |
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# as mongodb cannot accept this |
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$doc->Push(data => $self->_remove_dots($data)); |
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} |
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$self->{coll}->insert($doc, { safe => $self->{safety} }); |
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} |
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179
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=head2 session_log( $session_id ) |
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=cut |
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183
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sub session_log { |
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my ($self, $session_id) = @_; |
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186
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my $_map = sub { |
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my $d = shift; |
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my $doc = { |
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session_id => $d->{session_id}, |
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date => $d->{date}->ymd, |
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time => $d->{date}->hms.'.'.$d->{date}->millisecond, |
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text => $d->{text} |
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}; |
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$doc->{data} = $d->{data} if $d->{data}; |
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return $doc; |
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}; |
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local $MongoDB::Cursor::slave_okay = 1; |
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map($_map->($_), $self->{coll}->find({ session_id => "$session_id" })->sort({ date => 1 })->all); |
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} |
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204
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=head2 list_sessions( [ \%opts ] ) |
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Takes all options defined by L<Pye>. The C<sort> option, however, takes a MongoDB |
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sorting definition, that is a hash-ref, e.g. C<< { _id => 1 } >>. This will |
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default to C<< { date => -1 } >>. |
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210
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=cut |
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sub list_sessions { |
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my ($self, $opts) = @_; |
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215
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local $MongoDB::Cursor::slave_okay = 1; |
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217
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$opts ||= {}; |
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$opts->{skip} ||= 0; |
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$opts->{limit} ||= 10; |
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$opts->{sort} ||= { date => -1 }; |
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222
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map +{ |
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id => $_->{_id}, |
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date => $_->{date}->ymd, |
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time => $_->{date}->hms.'.'.$_->{date}->millisecond |
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}, @{$self->{coll}->aggregate([ |
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{ '$group' => { _id => '$session_id', date => { '$min' => '$date' } } }, |
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{ '$sort' => $opts->{sort} }, |
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{ '$skip' => $opts->{skip} }, |
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{ '$limit' => $opts->{limit} } |
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])}; |
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} |
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################################### |
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# _remove_dots( \%data ) # |
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#=================================# |
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# replaces dots in the hash-ref's # |
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# keys with semicolons, so that # |
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# mongodb won't complain about it # |
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################################### |
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sub _remove_dots { |
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my ($self, $data) = @_; |
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if (ref $data eq 'HASH') { |
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my %data; |
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foreach (keys %$data) { |
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my $new = $_; |
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$new =~ s/\./;/g; |
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if (ref $data->{$_} && ref $data->{$_} eq 'HASH') { |
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$data{$new} = $self->_remove_dots($data->{$_}); |
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} elsif (ref $data->{$_} && ref $data->{$_} eq 'ARRAY') { |
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$data{$new} = []; |
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foreach my $item (@{$data->{$_}}) { |
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push(@{$data{$new}}, $self->_remove_dots($item)); |
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} |
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} else { |
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$data{$new} = $data->{$_}; |
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} |
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} |
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return \%data; |
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} elsif (ref $data eq 'ARRAY') { |
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my @data; |
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foreach (@$data) { |
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push(@data, $self->_remove_dots($_)); |
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} |
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return \@data; |
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} else { |
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return $data; |
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} |
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} |
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##################################### |
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# _remove_session_logs($session_id) # |
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#===================================# |
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# removes all log messages for the # |
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# supplied session ID. # |
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##################################### |
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sub _remove_session_logs { |
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my ($self, $session_id) = @_; |
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$self->{coll}->remove({ session_id => "$session_id" }, { safe => $self->{safety} }); |
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} |
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=head1 CONFIGURATION AND ENVIRONMENT |
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C<Pye::MongoDB> requires no configuration files or environment variables. |
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=head1 DEPENDENCIES |
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C<Pye::MongoDB> depends on the following CPAN modules: |
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=over |
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=item * L<version> |
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=item * L<Carp> |
300
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301
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=item * L<MongoDB> |
302
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303
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=item * L<Pye> |
304
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305
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=item * L<Role::Tiny> |
306
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307
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=item * L<Tie::IxHash> |
308
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309
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|
=back |
310
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311
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|
=head1 BUGS AND LIMITATIONS |
312
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|
313
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|
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|
|
Please report any bugs or feature requests to |
314
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|
|
|
|
C<bug-Pye-MongoDB@rt.cpan.org>, or through the web interface at |
315
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|
|
L<http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Pye-MongoDB>. |
316
|
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317
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|
|
=head1 SUPPORT |
318
|
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|
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|
|
319
|
|
|
|
|
|
|
You can find documentation for this module with the perldoc command. |
320
|
|
|
|
|
|
|
|
321
|
|
|
|
|
|
|
perldoc Pye::MongoDB |
322
|
|
|
|
|
|
|
|
323
|
|
|
|
|
|
|
You can also look for information at: |
324
|
|
|
|
|
|
|
|
325
|
|
|
|
|
|
|
=over 4 |
326
|
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|
|
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|
|
327
|
|
|
|
|
|
|
=item * RT: CPAN's request tracker |
328
|
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|
|
|
|
329
|
|
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|
|
|
|
L<http://rt.cpan.org/NoAuth/Bugs.html?Dist=Pye-MongoDB> |
330
|
|
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|
|
|
|
|
331
|
|
|
|
|
|
|
=item * AnnoCPAN: Annotated CPAN documentation |
332
|
|
|
|
|
|
|
|
333
|
|
|
|
|
|
|
L<http://annocpan.org/dist/Pye-MongoDB> |
334
|
|
|
|
|
|
|
|
335
|
|
|
|
|
|
|
=item * CPAN Ratings |
336
|
|
|
|
|
|
|
|
337
|
|
|
|
|
|
|
L<http://cpanratings.perl.org/d/Pye-MongoDB> |
338
|
|
|
|
|
|
|
|
339
|
|
|
|
|
|
|
=item * Search CPAN |
340
|
|
|
|
|
|
|
|
341
|
|
|
|
|
|
|
L<http://search.cpan.org/dist/Pye-MongoDB/> |
342
|
|
|
|
|
|
|
|
343
|
|
|
|
|
|
|
=back |
344
|
|
|
|
|
|
|
|
345
|
|
|
|
|
|
|
=head1 AUTHOR |
346
|
|
|
|
|
|
|
|
347
|
|
|
|
|
|
|
Ido Perlmuter <ido@ido50.net> |
348
|
|
|
|
|
|
|
|
349
|
|
|
|
|
|
|
=head1 LICENSE AND COPYRIGHT |
350
|
|
|
|
|
|
|
|
351
|
|
|
|
|
|
|
Copyright (c) 2015, Ido Perlmuter C<< ido@ido50.net >>. |
352
|
|
|
|
|
|
|
|
353
|
|
|
|
|
|
|
This module is free software; you can redistribute it and/or |
354
|
|
|
|
|
|
|
modify it under the same terms as Perl itself, either version |
355
|
|
|
|
|
|
|
5.8.1 or any later version. See L<perlartistic|perlartistic> |
356
|
|
|
|
|
|
|
and L<perlgpl|perlgpl>. |
357
|
|
|
|
|
|
|
|
358
|
|
|
|
|
|
|
The full text of the license can be found in the |
359
|
|
|
|
|
|
|
LICENSE file included with this module. |
360
|
|
|
|
|
|
|
|
361
|
|
|
|
|
|
|
=head1 DISCLAIMER OF WARRANTY |
362
|
|
|
|
|
|
|
|
363
|
|
|
|
|
|
|
BECAUSE THIS SOFTWARE IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY |
364
|
|
|
|
|
|
|
FOR THE SOFTWARE, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN |
365
|
|
|
|
|
|
|
OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES |
366
|
|
|
|
|
|
|
PROVIDE THE SOFTWARE "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER |
367
|
|
|
|
|
|
|
EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
368
|
|
|
|
|
|
|
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE |
369
|
|
|
|
|
|
|
ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE SOFTWARE IS WITH |
370
|
|
|
|
|
|
|
YOU. SHOULD THE SOFTWARE PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL |
371
|
|
|
|
|
|
|
NECESSARY SERVICING, REPAIR, OR CORRECTION. |
372
|
|
|
|
|
|
|
|
373
|
|
|
|
|
|
|
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING |
374
|
|
|
|
|
|
|
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR |
375
|
|
|
|
|
|
|
REDISTRIBUTE THE SOFTWARE AS PERMITTED BY THE ABOVE LICENCE, BE |
376
|
|
|
|
|
|
|
LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL, |
377
|
|
|
|
|
|
|
OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE |
378
|
|
|
|
|
|
|
THE SOFTWARE (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING |
379
|
|
|
|
|
|
|
RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A |
380
|
|
|
|
|
|
|
FAILURE OF THE SOFTWARE TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF |
381
|
|
|
|
|
|
|
SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF |
382
|
|
|
|
|
|
|
SUCH DAMAGES. |
383
|
|
|
|
|
|
|
|
384
|
|
|
|
|
|
|
=cut |
385
|
|
|
|
|
|
|
|
386
|
|
|
|
|
|
|
1; |
387
|
|
|
|
|
|
|
__END__ |