1 package Object::Remote::Connection;
3 use Object::Remote::Future;
4 use Object::Remote::Null;
5 use Object::Remote::Handle;
8 use Module::Runtime qw(use_module);
9 use Scalar::Util qw(weaken blessed refaddr);
10 use JSON::PP qw(encode_json);
16 is => 'ro', required => 1,
17 trigger => sub { $_[1]->autoflush(1) },
20 has receive_from_fh => (
21 is => 'ro', required => 1,
25 Object::Remote->current_loop
28 on_read_ready => sub { $self->_receive_data_from($fh) }
33 has on_close => (is => 'rw', default => sub {});
35 has child_pid => (is => 'ro');
37 has _receive_data_buffer => (is => 'ro', default => sub { my $x = ''; \$x });
39 has local_objects_by_id => (is => 'ro', default => sub { {} });
41 has remote_objects_by_id => (is => 'ro', default => sub { {} });
46 _deserialize => 'decode',
52 weaken(my $self = shift);
53 my $remotes = $self->remote_objects_by_id;
54 JSON::PP->new->filter_json_single_key_object(
55 __remote_object__ => sub {
57 return bless({}, 'Object::Remote::Null') if $id eq 'NULL';
60 or Object::Remote::Handle->new(connection => $self, id => $id)
67 unshift our @Guess, sub { blessed($_[0]) ? $_[0] : undef };
68 eval { require Object::Remote::Connector::Local };
69 eval { require Object::Remote::Connector::SSH };
73 my ($class, $spec) = @_;
74 foreach my $poss (do { our @Guess }) {
75 if (my $obj = $poss->($spec)) { return $obj }
77 die "Couldn't figure out what to do with ${spec}";
81 my ($self, $remote) = @_;
82 weaken($self->remote_objects_by_id->{$remote->id} = $remote);
88 delete $self->remote_objects_by_id->{$id};
89 $self->_send([ free => $id ]);
93 my ($self, $type, @call) = @_;
95 unshift @call, $type => my $future = CPS::Future->new;
103 my ($self, $type, @call) = @_;
105 unshift @call, $type => { __remote_object__ => 'NULL' };
107 $self->_send(\@call);
111 my ($self, $to_send) = @_;
113 print { $self->send_to_fh } $self->_serialize($to_send)."\n";
117 my ($self, $data) = @_;
120 my $flat = $self->_encode($self->_deobjectify($data));
121 warn "$$ >>> ${flat}\n" if $DEBUG;
124 my $err = $@; # won't get here if the eval doesn't die
125 # don't keep refs to new things
126 delete @{$self->local_objects_by_id}{@New_Ids};
127 die "Error serializing: $err";
132 my ($self, $data) = @_;
133 if (blessed($data)) {
134 my $id = refaddr($data);
135 $self->local_objects_by_id->{$id} ||= do {
136 push our(@New_Ids), $id;
139 return +{ __remote_object__ => $id };
140 } elsif (my $ref = ref($data)) {
141 if ($ref eq 'HASH') {
142 return +{ map +($_ => $self->_deobjectify($data->{$_})), keys %$data };
143 } elsif ($ref eq 'ARRAY') {
144 return [ map $self->_deobjectify($_), @$data ];
146 die "Can't collapse reftype $ref";
149 return $data; # plain scalar
152 sub _receive_data_from {
153 my ($self, $fh) = @_;
154 my $rb = $self->_receive_data_buffer;
155 if (sysread($fh, $$rb, 1024, length($$rb)) > 0) {
156 while ($$rb =~ s/^(.*)\n//) {
160 $self->on_close->done();
165 my ($self, $flat) = @_;
166 warn "$$ <<< $flat\n" if $DEBUG;
167 my ($type, @rest) = eval { @{$self->_deserialize($flat)} }
168 or do { warn "Deserialize failed for ${flat}: $@"; return };
169 eval { $self->${\"receive_${type}"}(@rest); 1 }
170 or do { warn "Receive failed for ${flat}: $@"; return };
175 my ($self, $id) = @_;
176 delete $self->local_objects_by_id->{$id}
177 or warn "Free: no such object $id";
182 my ($self, $future, $id, @rest) = @_;
183 $future->{method} = 'call_discard_free';
184 my $local = $self->local_objects_by_id->{$id}
185 or do { $future->fail("No such object $id"); return };
186 $self->_invoke($future, $local, @rest);
189 sub receive_call_free {
190 my ($self, $future, $id, @rest) = @_;
191 $self->receive_call($future, $id, undef, @rest);
192 $self->receive_free($id);
195 sub receive_class_call {
196 my ($self, $future, $class, @rest) = @_;
197 $future->{method} = 'call_discard_free';
198 eval { use_module($class) }
199 or do { $future->fail("Error loading ${class}: $@"); return };
200 $self->_invoke($future, $class, @rest);
204 my ($self, $future, $local, $ctx, $method, @args) = @_;
205 if ($method =~ /^start::/) {
206 my $f = $local->$method(@args);
207 $f->on_done(sub { undef($f); $future->done(@_) });
209 $f->on_fail(sub { undef($f); $future->fail(@_) });
212 my $do = sub { $local->$method(@args) };
216 ? ($ctx ? $do->() : scalar($do->()))
220 } or do { $future->fail($@); return; };
225 my ($self, $gd) = @_;
227 Object::Remote->current_loop
229 handle => $self->receive_from_fh,