package Object::Remote::Connection;
-use CPS::Future;
+use Object::Remote::Future;
use Object::Remote::Null;
+use Object::Remote::Handle;
+use Object::Remote::CodeContainer;
+use Object::Remote::GlobProxy;
+use Object::Remote::GlobContainer;
use Object::Remote;
+use Symbol;
use IO::Handle;
use Module::Runtime qw(use_module);
use Scalar::Util qw(weaken blessed refaddr);
use JSON::PP qw(encode_json);
use Moo;
-our $DEBUG;
+our $DEBUG = !!$ENV{OBJECT_REMOTE_DEBUG};
has send_to_fh => (
is => 'ro', required => 1,
trigger => sub { $_[1]->autoflush(1) },
);
-has receive_from_fh => (
+has read_channel => (
is => 'ro', required => 1,
trigger => sub {
- my ($self, $fh) = @_;
+ my ($self, $ch) = @_;
weaken($self);
- Object::Remote->current_loop
- ->watch_io(
- handle => $fh,
- on_read_ready => sub { $self->_receive_data_from($fh) }
- );
+ $ch->on_line_call(sub { $self->_receive(@_) });
+ $ch->on_close_call(sub { $self->on_close->done(@_) });
},
);
-has on_close => (is => 'rw', default => sub {});
+has on_close => (
+ is => 'ro', default => sub { CPS::Future->new },
+ trigger => sub {
+ my ($self, $f) = @_;
+ weaken($self);
+ $f->on_done(sub {
+ $self->_fail_outstanding("Connection lost: ".($f->get)[0]);
+ });
+ }
+);
+
+has child_pid => (is => 'ro');
-has _receive_data_buffer => (is => 'ro', default => sub { my $x = ''; \$x });
+has local_objects_by_id => (
+ is => 'ro', default => sub { {} },
+ coerce => sub { +{ %{$_[0]} } }, # shallow clone on the way in
+);
-has local_objects_by_id => (is => 'ro', default => sub { {} });
+has remote_objects_by_id => (
+ is => 'ro', default => sub { {} },
+ coerce => sub { +{ %{$_[0]} } }, # shallow clone on the way in
+);
-has remote_objects_by_id => (is => 'ro', default => sub { {} });
+has outstanding_futures => (is => 'ro', default => sub { {} });
+
+sub _fail_outstanding {
+ my ($self, $error) = @_;
+ my $outstanding = $self->outstanding_futures;
+ $_->fail($error) for values %$outstanding;
+ %$outstanding = ();
+ return;
+}
has _json => (
is => 'lazy',
},
);
+sub _id_to_remote_object {
+ my ($self, $id) = @_;
+ return bless({}, 'Object::Remote::Null') if $id eq 'NULL';
+ (
+ $self->remote_objects_by_id->{$id}
+ or Object::Remote::Handle->new(connection => $self, id => $id)
+ )->proxy;
+}
+
sub _build__json {
weaken(my $self = shift);
- my $remotes = $self->remote_objects_by_id;
JSON::PP->new->filter_json_single_key_object(
__remote_object__ => sub {
- my $id = shift;
- return bless({}, 'Object::Remote::Null') if $id eq 'NULL';
- (
- $remotes->{$id}
- or Object::Remote->new(connection => $self, id => $id)
- )->proxy;
+ $self->_id_to_remote_object(@_);
+ }
+ )->filter_json_single_key_object(
+ __remote_code__ => sub {
+ my $code_container = $self->_id_to_remote_object(@_);
+ sub { $code_container->call(@_) };
+ }
+ )->filter_json_single_key_object(
+ __scalar_ref__ => sub {
+ my $value = shift;
+ return \$value;
+ }
+ )->filter_json_single_key_object(
+ __glob_ref__ => sub {
+ my $glob_container = $self->_id_to_remote_object(@_);
+ my $handle = Symbol::gensym;
+ tie *$handle, 'Object::Remote::GlobProxy', $glob_container;
+ return $handle;
+ }
+ );
+}
+
+BEGIN {
+ unshift our @Guess, sub { blessed($_[0]) ? $_[0] : undef };
+ eval { require Object::Remote::Connector::Local };
+ eval { require Object::Remote::Connector::LocalSudo };
+ eval { require Object::Remote::Connector::SSH };
+ eval { require Object::Remote::Connector::UNIX };
+}
+
+sub new_from_spec {
+ my ($class, $spec) = @_;
+ return $spec if blessed $spec;
+ foreach my $poss (do { our @Guess }) {
+ if (my $conn = $poss->($spec)) {
+ return $conn->maybe::start::connect;
+ }
+ }
+ die "Couldn't figure out what to do with ${spec}";
+}
+
+sub remote_object {
+ my ($self, @args) = @_;
+ Object::Remote::Handle->new(
+ connection => $self, @args
+ )->proxy;
+}
+
+sub connect {
+ my ($self, $to) = @_;
+ return await_future(
+ $self->send_class_call(0, 'Object::Remote', connect => $to)
+ );
+}
+
+sub remote_sub {
+ my ($self, $sub) = @_;
+ my ($pkg, $name) = $sub =~ m/^(.*)::([^:]+)$/;
+ return await_future($self->send_class_call(0, $pkg, can => $name));
+}
+
+sub send_class_call {
+ my ($self, $ctx, @call) = @_;
+ $self->send(call => class_call_handler => $ctx => call => @call);
+}
+
+sub register_class_call_handler {
+ my ($self) = @_;
+ $self->local_objects_by_id->{'class_call_handler'} ||= do {
+ my $o = $self->new_class_call_handler;
+ $self->_local_object_to_id($o);
+ $o;
+ };
+}
+
+sub new_class_call_handler {
+ Object::Remote::CodeContainer->new(
+ code => sub {
+ my ($class, $method) = (shift, shift);
+ use_module($class)->$method(@_);
}
);
}
sub send {
my ($self, $type, @call) = @_;
- unshift @call, $type => my $future = CPS::Future->new;
+ my $future = CPS::Future->new;
+ my $remote = $self->remote_objects_by_id->{$call[0]};
+
+ unshift @call, $type => $self->_local_object_to_id($future);
+
+ my $outstanding = $self->outstanding_futures;
+ $outstanding->{$future} = $future;
+ $future->on_ready(sub {
+ undef($remote);
+ delete $outstanding->{$future}
+ });
$self->_send(\@call);
sub send_discard {
my ($self, $type, @call) = @_;
- unshift @call, $type => { __remote_object__ => 'NULL' };
+ unshift @call, $type => 'NULL';
$self->_send(\@call);
}
sub _serialize {
my ($self, $data) = @_;
- local our @New_Ids;
+ local our @New_Ids = (-1);
return eval {
my $flat = $self->_encode($self->_deobjectify($data));
warn "$$ >>> ${flat}\n" if $DEBUG;
$flat;
- } or do {
+ } || do {
my $err = $@; # won't get here if the eval doesn't die
# don't keep refs to new things
delete @{$self->local_objects_by_id}{@New_Ids};
};
}
+sub _local_object_to_id {
+ my ($self, $object) = @_;
+ my $id = refaddr($object);
+ $self->local_objects_by_id->{$id} ||= do {
+ push our(@New_Ids), $id if @New_Ids;
+ $object;
+ };
+ return $id;
+}
+
sub _deobjectify {
my ($self, $data) = @_;
if (blessed($data)) {
- my $id = refaddr($data);
- $self->local_objects_by_id->{$id} ||= do {
- push our(@New_Ids), $id;
- $data;
- };
- return +{ __remote_object__ => $id };
+ return +{ __remote_object__ => $self->_local_object_to_id($data) };
} elsif (my $ref = ref($data)) {
if ($ref eq 'HASH') {
return +{ map +($_ => $self->_deobjectify($data->{$_})), keys %$data };
} elsif ($ref eq 'ARRAY') {
return [ map $self->_deobjectify($_), @$data ];
+ } elsif ($ref eq 'CODE') {
+ my $id = $self->_local_object_to_id(
+ Object::Remote::CodeContainer->new(code => $data)
+ );
+ return +{ __remote_code__ => $id };
+ } elsif ($ref eq 'SCALAR') {
+ return +{ __scalar_ref__ => $$data };
+ } elsif ($ref eq 'GLOB') {
+ return +{ __glob_ref__ => $self->_local_object_to_id(
+ Object::Remote::GlobContainer->new(handle => $data)
+ ) };
} else {
die "Can't collapse reftype $ref";
}
return $data; # plain scalar
}
-sub _receive_data_from {
- my ($self, $fh) = @_;
- my $rb = $self->_receive_data_buffer;
- if (sysread($fh, $$rb, 1024, length($$rb)) > 0) {
- while ($$rb =~ s/^(.*)\n//) {
- $self->_receive($1);
- }
- } else {
- $self->on_close->();
- }
-}
-
sub _receive {
my ($self, $flat) = @_;
warn "$$ <<< $flat\n" if $DEBUG;
}
sub receive_call {
- my ($self, $future, $id, @rest) = @_;
+ my ($self, $future_id, $id, @rest) = @_;
+ my $future = $self->_id_to_remote_object($future_id);
$future->{method} = 'call_discard_free';
my $local = $self->local_objects_by_id->{$id}
or do { $future->fail("No such object $id"); return };
sub receive_call_free {
my ($self, $future, $id, @rest) = @_;
- $self->receive_call($future, $id, @rest);
+ $self->receive_call($future, $id, undef, @rest);
$self->receive_free($id);
}
-sub receive_class_call {
- my ($self, $future, $class, @rest) = @_;
- $future->{method} = 'call_discard_free';
- eval { use_module($class) }
- or do { $future->fail("Error loading ${class}: $@"); return };
- $self->_invoke($future, $class, @rest);
-}
-
sub _invoke {
- my ($self, $future, $local, $method, @args) = @_;
- eval { $future->done(scalar $local->$method(@args)); 1 }
- or do { $future->fail($@); return; };
+ my ($self, $future, $local, $ctx, $method, @args) = @_;
+ if ($method =~ /^start::/) {
+ my $f = $local->$method(@args);
+ $f->on_done(sub { undef($f); $future->done(@_) });
+ return unless $f;
+ $f->on_fail(sub { undef($f); $future->fail(@_) });
+ return;
+ }
+ my $do = sub { $local->$method(@args) };
+ eval {
+ $future->done(
+ defined($ctx)
+ ? ($ctx ? $do->() : scalar($do->()))
+ : do { $do->(); () }
+ );
+ 1;
+ } or do { $future->fail($@); return; };
return;
}
-sub DEMOLISH {
- my ($self, $gd) = @_;
- return if $gd;
- Object::Remote->current_loop
- ->unwatch_io(
- handle => $self->receive_from_fh,
- on_read_ready => 1
- );
-}
-
1;
+
+=head1 NAME
+
+Object::Remote::Connection - An underlying connection for L<Object::Remote>
+
+=head1 LAME
+
+Shipping prioritised over writing this part up. Blame mst.
+
+=cut
projects / scpubgit/Object-Remote.git / blobdiff