/usr/share/perl5/MR/IProto/Connection/Sync.pm is in libmr-tarantool-perl 0.0.24-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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=head1 NAME
MR::IProto::Connection::Sync - sync communication
=head1 DESCRIPTION
Used to perform synchronous communication.
=cut
use Mouse;
extends 'MR::IProto::Connection';
use Errno;
use IO::Socket::INET;
use Socket qw( TCP_NODELAY SO_KEEPALIVE SO_SNDTIMEO SO_RCVTIMEO );
has _socket => (
is => 'ro',
isa => 'IO::Socket::INET',
predicate => '_has_socket',
clearer => '_clear_socket',
lazy_build => 1,
);
has _sent => (
is => 'ro',
default => sub { {} },
);
has last_sync => (
is => 'rw',
isa => 'Int',
);
has last_error => (
is => 'rw',
isa => 'Str',
default => '',
);
=head1 PUBLIC METHODS
=over
=item fh
Returns socket.
=item send
See L<MR::IProto::Connection/send> for more information.
=cut
sub fh { return $_[0]->_has_socket && $_[0]->_socket }
sub Close {
my ($self, $reason) = @_;
$self->_handle_error(undef, undef, $reason);
}
sub send {
my ($self, $msg, $payload, $callback, $no_reply, $sync) = @_;
my $server = $self->server;
my $sent = $self->_sent;
my $ok = eval {
if(defined $sync) {
die "Sync $sync already sent" if exists $sent->{$sync};
} else {
1 while exists $sent->{$sync = $self->_choose_sync()};
}
$server->_send_started($sync, $msg, $payload);
my $socket = $self->_socket;
unless (%$sent) {
vec((my $rin = ''), fileno($socket), 1) = 1;
if (select((my $rout = $rin), undef, undef, 0) > 0) {
if (sysread($socket, my $buf, 1)) {
die "More then 0 bytes was received when nothing was waited for";
} else {
# Connection was closed by other side, socket is in CLOSE_WAIT state, reconnecting
$self->_clear_socket();
$socket = $self->_socket;
}
}
}
my $header = $self->_pack_header($msg, length $payload, $sync);
if( $server->debug >= 5 ) {
$server->_debug_dump('send header: ', $header);
$server->_debug_dump('send payload: ', $payload);
}
my $write = $header . $payload;
while( length $write ) {
my $written = syswrite($socket, $write);
if (!defined $written) {
if ($! != Errno::EINTR) {
$! = Errno::ETIMEDOUT if $! == Errno::EAGAIN; # Hack over SO_SNDTIMEO behaviour
die "send: $!";
}
} else {
substr $write, 0, $written, '';
}
}
1;
};
my $err = $@;
$self->last_sync($sync);
if($ok) {
if ($no_reply) {
$callback->(undef, undef);
$server->_recv_finished($sync, undef, undef);
} else {
$sent->{$sync} = $callback;
}
}
else {
$self->_handle_error($sync, $callback, $err);
}
return $ok;
}
sub recv_all {
my ($self, %opts) = @_;
my $server = $self->server;
my $sent = $self->_sent;
my $dump_resp = $server->debug >= 6;
my @sync = keys %$sent;
my $n = $opts{max} || @sync;
while ($n-- and %$sent) {
my ($resp_msg, $resp_payload);
my ($sync,$callback);
my $ok = eval {
my $socket = $self->_socket;
my $resp_header;
my $to_read = 12;
while( $to_read ) {
my $read = sysread($socket, my $buf, $to_read);
if (!defined $read) {
if ($! != Errno::EINTR) {
$! = Errno::ETIMEDOUT if $! == Errno::EAGAIN; # Hack over SO_RCVTIMEO behaviour
die "recv: $!";
}
} elsif ($read == 0) {
die "recv: Unexpected end-of-file";
} else {
$resp_header .= $buf;
$to_read -= $read;
}
}
$server->_debug_dump('recv header: ', $resp_header) if $dump_resp;
($resp_msg, my $resp_length, $sync) = $self->_unpack_header($resp_header);
$callback = delete $sent->{$sync} or die "Reply sync $sync not found";
#die "Request and reply sync is different: $resp_sync != $sync" unless $resp_sync == $sync;
$to_read = $resp_length;
while( $to_read ) {
my $read = sysread($socket, my $buf, $to_read);
if (!defined $read) {
if ($! != Errno::EINTR) {
$! = Errno::ETIMEDOUT if $! == Errno::EAGAIN; # Hack over SO_RCVTIMEO behaviour
die "recv: $!";
}
} elsif ($read == 0) {
die "recv: Unexpected end-of-file";
} else {
$resp_payload .= $buf;
$to_read -= $read;
}
}
$server->_debug_dump('recv payload: ', $resp_payload) if $dump_resp;
1;
};
if($ok) {
$server->_recv_finished($sync, $resp_msg, $resp_payload);
die "No Callback" unless $callback;
$callback->($resp_msg, $resp_payload);
}
else {
$self->_handle_error(undef, undef, $@);
}
}
return;
}
=item set_timeout( $timeout )
Set timeout value for existing connection.
=cut
sub set_timeout {
my ($self, $timeout) = @_;
$self->_set_timeout($self->_socket, $timeout) if $self->_has_socket();
return;
}
=back
=cut
sub _build__socket {
my ($self) = @_;
my $server = $self->server;
$server->_debug("connecting") if $server->debug >= 4;
my $socket = IO::Socket::INET->new(
PeerHost => $self->host,
PeerPort => $self->port,
Proto => 'tcp',
Timeout => $self->connect_timeout,
) or do {
$@ =~ s/^IO::Socket::INET: (?:connect: )?//;
if ($@ eq 'timeout') {
# Hack over IO::Socket behaviour
$! = Errno::ETIMEDOUT;
$@ = "$!";
}
die "connect: $@";
};
$socket->sockopt(SO_KEEPALIVE, 1) if $self->tcp_keepalive;
$socket->setsockopt((getprotobyname('tcp'))[2], TCP_NODELAY, 1) if $self->tcp_nodelay;
$self->_set_timeout($socket, $self->timeout) if $self->timeout;
$server->_debug("connected") if $server->debug >= 4;
return $socket;
}
sub _set_timeout {
my ($self, $socket, $timeout) = @_;
my $sec = int $timeout; # seconds
my $usec = int( ($timeout - $sec) * 1_000_000 ); # micro-seconds
my $timeval = pack "L!L!", $sec, $usec; # struct timeval;
$socket->sockopt(SO_SNDTIMEO, $timeval);
$socket->sockopt(SO_RCVTIMEO, $timeval);
return;
}
sub _handle_error {
my ($self, $sync, $callback, $error) = @_;
my $errno = $!;
if (!$error) {
$error = 'Unknown error';
} elsif ($error =~ /^(.+?) at \S+ line \d+/s) {
$error = $1;
}
$self->last_error($error);
my $server = $self->server;
$server->_debug("error: $error");
if($self->_has_socket()) {
close($self->_socket);
$self->_clear_socket();
}
$server->active(0);
my $sent = $self->_sent;
if($sync && $callback) {
$server->_recv_finished($sync, undef, undef, $error, $errno);
$callback->(undef, undef, $error, $errno);
delete $sent->{$sync};
}
foreach my $sync (keys %$sent) {
$server->_recv_finished($sync, undef, undef, $error, $errno);
$sent->{$sync}->(undef, undef, $error, $errno);
}
undef %$sent;
return;
}
=head1 SEE ALSO
L<MR::IProto::Connection>, L<MR::IProto::Cluster::Server>.
=cut
no Mouse;
__PACKAGE__->meta->make_immutable();
1;
|