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# Copyright 2016 - 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;
use Test::More 0.96;
use Test::Fatal;
use JSON::MaybeXS;
use Path::Tiny 0.054; # basename with suffix
use MongoDB;
use MongoDB::ReadPreference;
use MongoDB::_Credential;
use MongoDB::_Server;
use MongoDB::_Topology;
use MongoDB::_URI;
sub exhaust_sort {
my $iter = shift;
my @result;
while ( defined( my $i = $iter->() ) ) {
push @result, $i;
}
return sort @result;
}
sub create_mock_topology {
my ( $uri, $type, $heartbeat_frequency_ms ) = @_;
$type ||= 'Single';
return MongoDB::_Topology->new(
uri => MongoDB::_URI->new( uri => $uri ),
type => $type,
min_server_version => "0.0.0",
max_wire_version => 3,
min_wire_version => 0,
last_scan_time => time + 60,
credential => MongoDB::_Credential->new(
mechanism => 'NONE',
monitoring_callback => undef
),
(
defined $heartbeat_frequency_ms
? ( heartbeat_frequency_sec => $heartbeat_frequency_ms / 1000 )
: ()
),
monitoring_callback => undef,
);
}
my %is_master_tmpl = (
'RSPrimary' => { ok => 1, setName => "foo", ismaster => 1 },
'RSSecondary' => { ok => 1, setName => "foo", secondary => 1 },
'Mongos' => { ok => 1, msg => 'isdbgrid' },
'Standalone' => { ok => 1 },
'Unknown' => {},
);
sub create_mock_server {
my ($s) = @_;
my %is_master = %{ $is_master_tmpl{ $s->{type} } };
$is_master{lastWrite}{lastWriteDate} = BSON::Time->new(
value => $s->{lastWrite}{lastWriteDate}{'$numberLong'}
) if exists $s->{lastWrite}{lastWriteDate};
$is_master{minWireVersion} = 0;
$is_master{maxWireVersion} = $s->{maxWireVersion} || 0;
$is_master{tags} = $s->{tags} if exists $s->{tags};
return MongoDB::_Server->new(
address => $s->{address},
last_update_time => defined $s->{lastUpdateTime} ? $s->{lastUpdateTime} : 0,
rtt_sec => $s->{avg_rtt_ms} ? $s->{avg_rtt_ms} / 1000 : 0,
is_master => \%is_master,
);
}
sub run_staleness_test {
my ( $name, $plan ) = @_;
$name =~ s{\.json$}{};
# prep topology
my $topo_desc = $plan->{topology_description};
my $topo = create_mock_topology( "mongodb://localhost", $topo_desc->{type},
$plan->{heartbeatFrequencyMS} );
$topo->_remove_address("localhost:27017");
for my $s ( @{ $topo_desc->{servers} } ) {
my $address = $s->{address};
my $server = create_mock_server($s);
$topo->servers->{ $server->address } = $server;
$topo->_update_ewma( $server->address, $server );
}
$topo->_check_wire_versions();
# select to read
my $rp = $plan->{read_preference};
my $read_pref = eval {
MongoDB::ReadPreference->new(
( exists $rp->{mode} ? ( mode => $rp->{mode} ) : () ),
( exists $rp->{tag_sets} ? ( tag_sets => $rp->{tag_sets} ) : () ),
(
exists $rp->{maxStalenessSeconds}
? ( max_staleness_seconds => $rp->{maxStalenessSeconds} )
: ()
),
);
};
# bail out early on RP construction error
my $rp_err = $@;
if ($rp_err) {
ok( $plan->{error}, $name ) or diag "Error: $rp_err";
return;
}
my $mode = $read_pref ? lc $read_pref->mode : 'primary';
my $method =
$topo->type eq "Single" ? '_find_available_server'
: $topo->type eq "Sharded" ? '_find_readable_mongos_server'
: "_find_${mode}_server";
my $got = eval { $topo->$method($read_pref) };
my $err = $@;
# check errors or suitable list
if ( $plan->{error} ) {
ok( length($err), $name )
or diag "Expected error but got none."
. ( defined $got ? "Got server " . $got->address : "" );
}
elsif ( !@{ $plan->{suitable_servers} } ) {
ok( !defined($got), $name )
or diag "Got " . $got->address . " but expected no servers at all.";
}
elsif ( !defined($got) ) {
fail($name);
diag "Server selection returned no entries";
}
else {
my @expect = @{ $plan->{suitable_servers} };
my $got_address = $got->address;
my $found = grep { $got_address eq $_->{address} } @expect;
ok( $found, $name )
or diag "Got $got_address, expected one of "
. join( ", ", map { $_->{address} } @expect );
}
}
my $source = path('t/data/max_staleness');
my $iterator = $source->iterator( { recurse => 1 } );
for my $path ( exhaust_sort($iterator) ) {
next unless -f $path && $path =~ /\.json$/;
my $plan = eval { decode_json( $path->slurp_utf8 ) };
if ($@) {
die "Error decoding $path: $@";
}
my $relpath = $path->relative($source);
eval { run_staleness_test( $relpath, $plan ) };
if ( my $err = $@ ) {
fail("$relpath failed");
diag($err);
}
}
# second value undef means error
my @uri_tests = (
[ "mongodb://host/?readPreference=secondary&maxStalenessSeconds=120", 120 ],
[ "mongodb://host/?maxStalenessSeconds=120", undef ],
[ "mongodb://host/?readPreference=primary&maxStalenessSeconds=120", undef ],
[ "mongodb://host/?readPreference=secondary&maxStalenessSeconds=-1", -1 ],
[ "mongodb://host/?readPreference=secondary&maxStalenessSeconds=1", 1 ],
[ "mongodb://host/?maxStalenessSeconds=-1", -1 ],
[ "mongodb://host/?readPreference=primary&maxStalenessSeconds=-1", -1 ],
# [ "mongodb://host/?readPreference=secondary&maxStalenessSeconds=0", undef ],
);
for my $case (@uri_tests) {
my ( $uri, $value ) = @$case;
if ($value) {
my $mc = MongoDB->connect($uri);
is( $mc->read_preference->max_staleness_seconds, $value, "$uri parsed" );
}
else {
eval { MongoDB->connect($uri) };
like( $@, qr/(max_staleness_seconds|maxStalenessSeconds)/,
"$uri is an error" );
}
}
done_testing;
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