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# Copyright 2018 - 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.
# MongoDB documentation examples in Perl.
# NOTE: Developers: Do not change these examples without approval of the
# MongoDB documentation team as they are extracted to populate examples
# on the MongoDB docs website.
#
# Examples use `$db->coll("inventory")` to parallel the shell examples, which
# use `db.inventory`. Testing commands use a `$coll` variable for more
# idiomatic brevity.
use strict;
use warnings;
use Test::More 0.96;
use MongoDB;
use Tie::IxHash;
use boolean;
use lib "t/lib";
use MongoDBTest qw/
skip_unless_mongod build_client get_test_db
server_version server_type
/;
skip_unless_mongod();
my $conn = build_client();
my $db = get_test_db($conn);
my $coll = $db->coll("inventory");
my $server_version = server_version($conn);
my $server_type = server_type($conn);
my $cursor;
# We want to show the examples without showing the inserts/updates
# that would make them work in reality and we don't have threads to
# do the work concurrently. Therefore, we show the example and then
# repeat the work with database operations and tests intermingled.
#<<< No perltidy
subtest "change streams" => sub {
plan skip_all => '$currentDate operator requires MongoDB 3.6+'
unless $server_version >= v3.6.0;
plan skip_all => 'Change Streams require replica set'
unless $server_type eq 'RSPrimary';
my $document;
my $resume_token;
my @pipeline;
# Initialize the database
$db->coll('warmup')->insert_one({});
# Start Changestream Example 1
$cursor = $db->coll('inventory')->watch();
$document = $cursor->next;
# End Changestream Example 1
is $document, undef, 'no changes after example 1';
$coll->insert_one({ username => 'alice' });
$document = $cursor->next;
is $document->{fullDocument}{username}, 'alice',
'found change inserted after example 1';
# Start Changestream Example 2
$cursor = $db->coll('inventory')->watch(
[],
{ fullDocument => 'updateLookup' },
);
$document = $cursor->next;
# End Changestream Example 2
is $document, undef, 'no changes after example 2';
$coll->update_one(
{ username => 'alice' },
{ '$set' => { updated => 1 } },
);
$document = $cursor->next;
is $document->{fullDocument}{username}, 'alice',
'found change made after example 2';
# Start Changestream Example 3
$resume_token = $document->{_id};
$cursor = $db->coll('inventory')->watch(
[],
{ resumeAfter => $resume_token },
);
$document = $cursor->next;
# End Changestream Example 3
is $document, undef, 'no changes after example 3';
$coll->update_one(
{ username => 'alice' },
{ '$set' => { updated => 2 } },
);
$document = $cursor->next;
ok $document, 'found change made after example 3';
# Start Changestream Example 4
@pipeline = (
{ '$match' => {
'$or' => [
{ 'fullDocument.username' => 'alice' },
{ 'operationType' => { '$in' => ['delete'] } },
],
} },
);
$cursor = $db->coll('inventory')->watch(\@pipeline);
$document = $cursor->next;
# End Changestream Example 4
is $document, undef, 'no changes after example 4';
$coll->delete_one({ username => 'alice' });
$document = $cursor->next;
ok $document, 'found change made after example 4';
$coll->drop;
};
#>>> no perltidy
done_testing;
Mini Shell