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Direktori : /home/opti/optisoftcom-new/perl/usr/lib/perl5/MongoDB/Op/ |
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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. use strict; use warnings; package MongoDB::Op::_ChangeStream; # Encapsulate changestream operation; return MongoDB::QueryResult # and operationTime if supported use version; our $VERSION = 'v2.0.2'; use Moo; use boolean; use BSON::Timestamp; use MongoDB::Op::_Command; use MongoDB::_Types qw( ArrayOfHashRef Boolish BSONTimestamp ); use Types::Standard qw( HashRef InstanceOf Num Str Maybe ); use namespace::clean; has client => ( is => 'ro', required => 1, isa => InstanceOf ['MongoDB::MongoClient'], ); has pipeline => ( is => 'ro', required => 1, isa => ArrayOfHashRef, ); has options => ( is => 'ro', required => 1, isa => HashRef, ); has maxAwaitTimeMS => ( is => 'rw', isa => Num, ); has full_document => ( is => 'ro', isa => Str, predicate => 'has_full_document', ); has resume_after => ( is => 'ro', predicate => 'has_resume_after', ); has all_changes_for_cluster => ( is => 'ro', isa => Boolish, default => sub { 0 }, ); has start_at_operation_time => ( is => 'ro', isa => BSONTimestamp, predicate => 'has_start_at_operation_time', ); with $_ for qw( MongoDB::Role::_PrivateConstructor MongoDB::Role::_CollectionOp MongoDB::Role::_ReadOp MongoDB::Role::_WriteOp MongoDB::Role::_CommandCursorOp ); sub execute { my ( $self, $link, $topology ) = @_; my $options = $self->options; my $is_2_6 = $link->supports_write_commands; # maxTimeMS isn't available until 2.6 and the aggregate command # will reject it as unrecognized delete $options->{maxTimeMS} unless $is_2_6; # bypassDocumentValidation isn't available until 3.2 (wire version 4) delete $options->{bypassDocumentValidation} unless $link->supports_document_validation; if ( defined $options->{collation} and !$link->supports_collation ) { MongoDB::UsageError->throw( "MongoDB host '" . $link->address . "' doesn't support collation" ); } # If 'cursor' is explicitly false, we disable using cursors, even # for MongoDB 2.6+. This allows users operating with a 2.6+ mongos # and pre-2.6 mongod in shards to avoid fatal errors. This # workaround should be removed once MongoDB 2.4 is no longer supported. my $use_cursor = $is_2_6 && ( !exists( $options->{cursor} ) || $options->{cursor} ); # batchSize is not a command parameter itself like other options my $batchSize = delete $options->{batchSize}; # If we're doing cursors, we first respect an explicit batchSize option; # next we fallback to the legacy (deprecated) cursor option batchSize; finally we # just give an empty document. Other than batchSize we ignore any other # legacy cursor options. If we're not doing cursors, don't send any # cursor option at all, as servers will choke on it. if ($use_cursor) { if ( defined $batchSize ) { $options->{cursor} = { batchSize => $batchSize }; } elsif ( ref $options->{cursor} eq 'HASH' ) { $batchSize = $options->{cursor}{batchSize}; $options->{cursor} = defined($batchSize) ? { batchSize => $batchSize } : {}; } else { $options->{cursor} = {}; } } else { delete $options->{cursor}; } if ( $self->coll_name eq 1 && ! $link->supports_db_aggregation ) { MongoDB::Error->throw( "Calling aggregate with a collection name of '1' is not supported on Wire Version < 6" ); } my @pipeline = ( {'$changeStream' => { ($self->has_start_at_operation_time ? (startAtOperationTime => $self->start_at_operation_time) : () ), ($self->all_changes_for_cluster ? (allChangesForCluster => true) : () ), ($self->has_full_document ? (fullDocument => $self->full_document) : () ), ($self->has_resume_after ? (resumeAfter => $self->resume_after) : () ), }}, @{ $self->pipeline }, ); my @command = ( aggregate => $self->coll_name, pipeline => \@pipeline, %$options, $link->supports_read_concern ? @{ $self->read_concern->as_args( $self->session) } : (), ); my $op = MongoDB::Op::_Command->_new( db_name => $self->db_name, query => Tie::IxHash->new(@command), query_flags => {}, bson_codec => $self->bson_codec, read_preference => $self->read_preference, session => $self->session, monitoring_callback => $self->monitoring_callback, ); my $res = $op->execute( $link, $topology ); # Fake up a single-batch cursor if we didn't get a cursor response. # We use the 'results' fields as the first (and only) batch if ( !$res->output->{cursor} ) { $res->output->{cursor} = { ns => '', id => 0, firstBatch => ( delete $res->output->{result} ) || [], }; } return { result => $self->_build_result_from_cursor($res), $link->supports_4_0_changestreams ? (operationTime => $res->output->{operationTime}) : (), }; } 1;