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# Copyright 2014 - present MongoDB, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
use strict;
use warnings;
package MongoDB::Op::_ListCollections;
# Encapsulate collection list operations; returns arrayref of collection
# names
use version;
our $VERSION = 'v2.2.2';
use Moo;
use MongoDB::Op::_Command;
use MongoDB::Op::_Query;
use MongoDB::ReadConcern;
use MongoDB::ReadPreference;
use MongoDB::_Types qw(
Document
ReadPreference
);
use Types::Standard qw(
HashRef
InstanceOf
Str
);
use Tie::IxHash;
use boolean;
use namespace::clean;
has client => (
is => 'ro',
required => 1,
isa => InstanceOf['MongoDB::MongoClient'],
);
has filter => (
is => 'ro',
required => 1,
isa => Document,
);
has options => (
is => 'ro',
required => 1,
isa => HashRef,
);
has read_preference => (
is => 'rw', # rw for Op::_Query which can be modified by Cursor
required => 1,
isa => ReadPreference,
);
with $_ for qw(
MongoDB::Role::_PrivateConstructor
MongoDB::Role::_DatabaseOp
MongoDB::Role::_CommandCursorOp
);
sub execute {
my ( $self, $link, $topology ) = @_;
my $res =
$link->supports_list_commands
? $self->_command_list_colls( $link, $topology )
: $self->_legacy_list_colls( $link, $topology );
return $res;
}
sub _command_list_colls {
my ( $self, $link, $topology ) = @_;
my $options = $self->options;
# batchSize is not a command parameter itself like other options
my $batchSize = delete $options->{batchSize};
if ( defined $batchSize ) {
$options->{cursor} = { batchSize => $batchSize };
}
else {
$options->{cursor} = {};
}
# Normalize or delete 'nameOnly'
if ($options->{nameOnly}) {
$options->{nameOnly} = true;
}
else {
delete $options->{nameOnly};
}
my $filter =
ref( $self->filter ) eq 'ARRAY'
? { @{ $self->filter } }
: $self->filter;
my $cmd = Tie::IxHash->new(
listCollections => 1,
filter => $filter,
nameOnly => false,
%{$self->options},
);
my $op = MongoDB::Op::_Command->_new(
db_name => $self->db_name,
query => $cmd,
query_flags => {},
bson_codec => $self->bson_codec,
session => $self->session,
monitoring_callback => $self->monitoring_callback,
read_preference => $self->read_preference,
);
my $res = $op->execute( $link, $topology );
return $self->_build_result_from_cursor( $res );
}
sub _legacy_list_colls {
my ( $self, $link, $topology ) = @_;
my $op = MongoDB::Op::_Query->_new(
filter => $self->filter,
options => MongoDB::Op::_Query->precondition_options($self->options),
db_name => $self->db_name,
coll_name => 'system.namespaces',
full_name => $self->db_name . ".system.namespaces",
bson_codec => $self->bson_codec,
client => $self->client,
read_preference => $self->read_preference || MongoDB::ReadPreference->new,
read_concern => MongoDB::ReadConcern->new,
post_filter => \&__filter_legacy_names,
monitoring_callback => $self->monitoring_callback,
);
return $op->execute( $link, $topology );
}
# exclude names with '$' except oplog.$
# XXX why do we include oplog.$?
sub __filter_legacy_names {
my $doc = shift;
# remove leading database name for compatibility with listCollections
$doc->{name} =~ s/^[^.]+\.//;
my $name = $doc->{name};
return !( index( $name, '$' ) >= 0 && index( $name, '.oplog.$' ) < 0 );
}
1;
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