Commit | Line | Data |
9e72f0cf |
1 | package Object::Remote::Connection; |
2 | |
3 | use CPS::Future; |
9d804009 |
4 | use Object::Remote::Null; |
9e72f0cf |
5 | use Object::Remote; |
6 | use IO::Handle; |
7 | use Module::Runtime qw(use_module); |
8 | use Scalar::Util qw(weaken blessed refaddr); |
9 | use JSON::PP qw(encode_json); |
10 | use Moo; |
11 | |
ad4f54b2 |
12 | our $DEBUG; |
13 | |
9e72f0cf |
14 | has send_to_fh => ( |
15 | is => 'ro', required => 1, |
16 | trigger => sub { $_[1]->autoflush(1) }, |
17 | ); |
18 | |
19 | has receive_from_fh => ( |
20 | is => 'ro', required => 1, |
21 | trigger => sub { |
22 | my ($self, $fh) = @_; |
23 | weaken($self); |
24 | Object::Remote->current_loop |
25 | ->watch_io( |
26 | handle => $fh, |
27 | on_read_ready => sub { $self->_receive_data_from($fh) } |
28 | ); |
29 | }, |
30 | ); |
31 | |
ad4f54b2 |
32 | has on_close => (is => 'rw', default => sub {}); |
33 | |
47c83a13 |
34 | has child_pid => (is => 'ro'); |
35 | |
9e72f0cf |
36 | has _receive_data_buffer => (is => 'ro', default => sub { my $x = ''; \$x }); |
37 | |
38 | has local_objects_by_id => (is => 'ro', default => sub { {} }); |
39 | |
2065b08b |
40 | has remote_objects_by_id => (is => 'ro', default => sub { {} }); |
9e72f0cf |
41 | |
42 | has _json => ( |
43 | is => 'lazy', |
44 | handles => { |
45 | _deserialize => 'decode', |
46 | _encode => 'encode', |
47 | }, |
48 | ); |
49 | |
50 | sub _build__json { |
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 { |
55 | my $id = shift; |
2065b08b |
56 | return bless({}, 'Object::Remote::Null') if $id eq 'NULL'; |
9e72f0cf |
57 | ( |
58 | $remotes->{$id} |
59 | or Object::Remote->new(connection => $self, id => $id) |
60 | )->proxy; |
61 | } |
62 | ); |
63 | } |
64 | |
65 | sub register_remote { |
66 | my ($self, $remote) = @_; |
67 | weaken($self->remote_objects_by_id->{$remote->id} = $remote); |
68 | return $remote; |
69 | } |
70 | |
71 | sub send_free { |
72 | my ($self, $id) = @_; |
73 | delete $self->remote_objects_by_id->{$id}; |
74 | $self->_send([ free => $id ]); |
75 | } |
76 | |
77 | sub send { |
78 | my ($self, $type, @call) = @_; |
79 | |
80 | unshift @call, $type => my $future = CPS::Future->new; |
81 | |
82 | $self->_send(\@call); |
83 | |
84 | return $future; |
85 | } |
86 | |
9d804009 |
87 | sub send_discard { |
88 | my ($self, $type, @call) = @_; |
89 | |
2065b08b |
90 | unshift @call, $type => { __remote_object__ => 'NULL' }; |
9d804009 |
91 | |
92 | $self->_send(\@call); |
93 | } |
94 | |
9e72f0cf |
95 | sub _send { |
96 | my ($self, $to_send) = @_; |
97 | |
9d804009 |
98 | print { $self->send_to_fh } $self->_serialize($to_send)."\n"; |
9e72f0cf |
99 | } |
100 | |
101 | sub _serialize { |
102 | my ($self, $data) = @_; |
103 | local our @New_Ids; |
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104 | return eval { |
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105 | my $flat = $self->_encode($self->_deobjectify($data)); |
106 | warn "$$ >>> ${flat}\n" if $DEBUG; |
107 | $flat; |
9d804009 |
108 | } or do { |
109 | my $err = $@; # won't get here if the eval doesn't die |
110 | # don't keep refs to new things |
111 | delete @{$self->local_objects_by_id}{@New_Ids}; |
112 | die "Error serializing: $err"; |
113 | }; |
9e72f0cf |
114 | } |
115 | |
116 | sub _deobjectify { |
117 | my ($self, $data) = @_; |
118 | if (blessed($data)) { |
119 | my $id = refaddr($data); |
120 | $self->local_objects_by_id->{$id} ||= do { |
121 | push our(@New_Ids), $id; |
122 | $data; |
123 | }; |
124 | return +{ __remote_object__ => $id }; |
125 | } elsif (my $ref = ref($data)) { |
126 | if ($ref eq 'HASH') { |
127 | return +{ map +($_ => $self->_deobjectify($data->{$_})), keys %$data }; |
128 | } elsif ($ref eq 'ARRAY') { |
129 | return [ map $self->_deobjectify($_), @$data ]; |
130 | } else { |
131 | die "Can't collapse reftype $ref"; |
132 | } |
133 | } |
134 | return $data; # plain scalar |
135 | } |
136 | |
137 | sub _receive_data_from { |
138 | my ($self, $fh) = @_; |
139 | my $rb = $self->_receive_data_buffer; |
9d804009 |
140 | if (sysread($fh, $$rb, 1024, length($$rb)) > 0) { |
9e72f0cf |
141 | while ($$rb =~ s/^(.*)\n//) { |
142 | $self->_receive($1); |
143 | } |
ad4f54b2 |
144 | } else { |
145 | $self->on_close->(); |
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146 | } |
147 | } |
148 | |
149 | sub _receive { |
ad4f54b2 |
150 | my ($self, $flat) = @_; |
151 | warn "$$ <<< $flat\n" if $DEBUG; |
152 | my ($type, @rest) = eval { @{$self->_deserialize($flat)} } |
153 | or do { warn "Deserialize failed for ${flat}: $@"; return }; |
9e72f0cf |
154 | eval { $self->${\"receive_${type}"}(@rest); 1 } |
ad4f54b2 |
155 | or do { warn "Receive failed for ${flat}: $@"; return }; |
9e72f0cf |
156 | return; |
157 | } |
158 | |
159 | sub receive_free { |
160 | my ($self, $id) = @_; |
9d804009 |
161 | delete $self->local_objects_by_id->{$id} |
162 | or warn "Free: no such object $id"; |
9e72f0cf |
163 | return; |
164 | } |
165 | |
166 | sub receive_call { |
167 | my ($self, $future, $id, @rest) = @_; |
8131a88a |
168 | $future->{method} = 'call_discard_free'; |
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169 | my $local = $self->local_objects_by_id->{$id} |
170 | or do { $future->fail("No such object $id"); return }; |
171 | $self->_invoke($future, $local, @rest); |
172 | } |
173 | |
8131a88a |
174 | sub receive_call_free { |
175 | my ($self, $future, $id, @rest) = @_; |
176 | $self->receive_call($future, $id, @rest); |
177 | $self->receive_free($id); |
178 | } |
179 | |
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180 | sub receive_class_call { |
181 | my ($self, $future, $class, @rest) = @_; |
8131a88a |
182 | $future->{method} = 'call_discard_free'; |
9e72f0cf |
183 | eval { use_module($class) } |
184 | or do { $future->fail("Error loading ${class}: $@"); return }; |
185 | $self->_invoke($future, $class, @rest); |
186 | } |
187 | |
188 | sub _invoke { |
189 | my ($self, $future, $local, $method, @args) = @_; |
ad4f54b2 |
190 | eval { $future->done(scalar $local->$method(@args)); 1 } |
9e72f0cf |
191 | or do { $future->fail($@); return; }; |
192 | return; |
193 | } |
194 | |
195 | sub DEMOLISH { |
196 | my ($self, $gd) = @_; |
197 | return if $gd; |
198 | Object::Remote->current_loop |
199 | ->unwatch_io( |
200 | handle => $self->receive_from_fh, |
201 | on_read_ready => 1 |
202 | ); |
203 | } |
204 | |
205 | 1; |