1 package Object::Remote::Connection;
4 use Object::Remote::Null;
7 use Module::Runtime qw(use_module);
8 use Scalar::Util qw(weaken blessed refaddr);
9 use JSON::PP qw(encode_json);
15 is => 'ro', required => 1,
16 trigger => sub { $_[1]->autoflush(1) },
19 has receive_from_fh => (
20 is => 'ro', required => 1,
24 Object::Remote->current_loop
27 on_read_ready => sub { $self->_receive_data_from($fh) }
32 has on_close => (is => 'rw', default => sub {});
34 has child_pid => (is => 'ro');
36 has _receive_data_buffer => (is => 'ro', default => sub { my $x = ''; \$x });
38 has local_objects_by_id => (is => 'ro', default => sub { {} });
40 has remote_objects_by_id => (is => 'ro', default => sub { {} });
45 _deserialize => 'decode',
51 weaken(my $self = shift);
52 my $remotes = $self->remote_objects_by_id;
53 JSON::PP->new->filter_json_single_key_object(
54 __remote_object__ => sub {
56 return bless({}, 'Object::Remote::Null') if $id eq 'NULL';
59 or Object::Remote->new(connection => $self, id => $id)
66 unshift our @Guess, sub { blessed($_[0]) ? $_[0] : undef };
67 eval { require Object::Remote::Connector::Local };
68 eval { require Object::Remote::Connector::SSH };
72 my ($class, $spec) = @_;
73 foreach my $poss (do { our @Guess }) {
74 if (my $obj = $poss->($spec)) { return $obj }
76 die "Couldn't figure out what to do with ${spec}";
80 my ($self, $remote) = @_;
81 weaken($self->remote_objects_by_id->{$remote->id} = $remote);
87 delete $self->remote_objects_by_id->{$id};
88 $self->_send([ free => $id ]);
92 my ($self, $type, @call) = @_;
94 unshift @call, $type => my $future = CPS::Future->new;
102 my ($self, $type, @call) = @_;
104 unshift @call, $type => { __remote_object__ => 'NULL' };
106 $self->_send(\@call);
110 my ($self, $to_send) = @_;
112 print { $self->send_to_fh } $self->_serialize($to_send)."\n";
116 my ($self, $data) = @_;
119 my $flat = $self->_encode($self->_deobjectify($data));
120 warn "$$ >>> ${flat}\n" if $DEBUG;
123 my $err = $@; # won't get here if the eval doesn't die
124 # don't keep refs to new things
125 delete @{$self->local_objects_by_id}{@New_Ids};
126 die "Error serializing: $err";
131 my ($self, $data) = @_;
132 if (blessed($data)) {
133 my $id = refaddr($data);
134 $self->local_objects_by_id->{$id} ||= do {
135 push our(@New_Ids), $id;
138 return +{ __remote_object__ => $id };
139 } elsif (my $ref = ref($data)) {
140 if ($ref eq 'HASH') {
141 return +{ map +($_ => $self->_deobjectify($data->{$_})), keys %$data };
142 } elsif ($ref eq 'ARRAY') {
143 return [ map $self->_deobjectify($_), @$data ];
145 die "Can't collapse reftype $ref";
148 return $data; # plain scalar
151 sub _receive_data_from {
152 my ($self, $fh) = @_;
153 my $rb = $self->_receive_data_buffer;
154 if (sysread($fh, $$rb, 1024, length($$rb)) > 0) {
155 while ($$rb =~ s/^(.*)\n//) {
164 my ($self, $flat) = @_;
165 warn "$$ <<< $flat\n" if $DEBUG;
166 my ($type, @rest) = eval { @{$self->_deserialize($flat)} }
167 or do { warn "Deserialize failed for ${flat}: $@"; return };
168 eval { $self->${\"receive_${type}"}(@rest); 1 }
169 or do { warn "Receive failed for ${flat}: $@"; return };
174 my ($self, $id) = @_;
175 delete $self->local_objects_by_id->{$id}
176 or warn "Free: no such object $id";
181 my ($self, $future, $id, @rest) = @_;
182 $future->{method} = 'call_discard_free';
183 my $local = $self->local_objects_by_id->{$id}
184 or do { $future->fail("No such object $id"); return };
185 $self->_invoke($future, $local, @rest);
188 sub receive_call_free {
189 my ($self, $future, $id, @rest) = @_;
190 $self->receive_call($future, $id, undef, @rest);
191 $self->receive_free($id);
194 sub receive_class_call {
195 my ($self, $future, $class, @rest) = @_;
196 $future->{method} = 'call_discard_free';
197 eval { use_module($class) }
198 or do { $future->fail("Error loading ${class}: $@"); return };
199 $self->_invoke($future, $class, @rest);
203 my ($self, $future, $local, $ctx, $method, @args) = @_;
204 my $do = sub { $local->$method(@args) };
208 ? ($ctx ? $do->() : scalar($do->()))
212 } or do { $future->fail($@); return; };
217 my ($self, $gd) = @_;
219 Object::Remote->current_loop
221 handle => $self->receive_from_fh,