Commit | Line | Data |
9e72f0cf |
1 | package Object::Remote::Connection; |
2 | |
3 | use CPS::Future; |
4 | use Object::Remote; |
5 | use IO::Handle; |
6 | use Module::Runtime qw(use_module); |
7 | use Scalar::Util qw(weaken blessed refaddr); |
8 | use JSON::PP qw(encode_json); |
9 | use Moo; |
10 | |
11 | has send_to_fh => ( |
12 | is => 'ro', required => 1, |
13 | trigger => sub { $_[1]->autoflush(1) }, |
14 | ); |
15 | |
16 | has receive_from_fh => ( |
17 | is => 'ro', required => 1, |
18 | trigger => sub { |
19 | my ($self, $fh) = @_; |
20 | weaken($self); |
21 | Object::Remote->current_loop |
22 | ->watch_io( |
23 | handle => $fh, |
24 | on_read_ready => sub { $self->_receive_data_from($fh) } |
25 | ); |
26 | }, |
27 | ); |
28 | |
29 | has _receive_data_buffer => (is => 'ro', default => sub { my $x = ''; \$x }); |
30 | |
31 | has local_objects_by_id => (is => 'ro', default => sub { {} }); |
32 | |
33 | has remote_objects_by_id => (is => 'ro', default => sub { {} }); |
34 | |
35 | has _json => ( |
36 | is => 'lazy', |
37 | handles => { |
38 | _deserialize => 'decode', |
39 | _encode => 'encode', |
40 | }, |
41 | ); |
42 | |
43 | sub _build__json { |
44 | weaken(my $self = shift); |
45 | my $remotes = $self->remote_objects_by_id; |
46 | JSON::PP->new->filter_json_single_key_object( |
47 | __remote_object__ => sub { |
48 | my $id = shift; |
49 | ( |
50 | $remotes->{$id} |
51 | or Object::Remote->new(connection => $self, id => $id) |
52 | )->proxy; |
53 | } |
54 | ); |
55 | } |
56 | |
57 | sub register_remote { |
58 | my ($self, $remote) = @_; |
59 | weaken($self->remote_objects_by_id->{$remote->id} = $remote); |
60 | return $remote; |
61 | } |
62 | |
63 | sub send_free { |
64 | my ($self, $id) = @_; |
65 | delete $self->remote_objects_by_id->{$id}; |
66 | $self->_send([ free => $id ]); |
67 | } |
68 | |
69 | sub send { |
70 | my ($self, $type, @call) = @_; |
71 | |
72 | unshift @call, $type => my $future = CPS::Future->new; |
73 | |
74 | $self->_send(\@call); |
75 | |
76 | return $future; |
77 | } |
78 | |
79 | sub _send { |
80 | my ($self, $to_send) = @_; |
81 | |
82 | print { $self->send_to_fh } $self->_serialize($to_send); |
83 | } |
84 | |
85 | sub _serialize { |
86 | my ($self, $data) = @_; |
87 | local our @New_Ids; |
88 | eval { return $self->_encode($self->_deobjectify($data)) }; |
89 | my $err = $@; # won't get here if the eval doesn't die |
90 | # don't keep refs to new things |
91 | delete @{$self->local_objects_by_id}{@New_Ids}; |
92 | die "Error serializing: $err"; |
93 | } |
94 | |
95 | sub _deobjectify { |
96 | my ($self, $data) = @_; |
97 | if (blessed($data)) { |
98 | my $id = refaddr($data); |
99 | $self->local_objects_by_id->{$id} ||= do { |
100 | push our(@New_Ids), $id; |
101 | $data; |
102 | }; |
103 | return +{ __remote_object__ => $id }; |
104 | } elsif (my $ref = ref($data)) { |
105 | if ($ref eq 'HASH') { |
106 | return +{ map +($_ => $self->_deobjectify($data->{$_})), keys %$data }; |
107 | } elsif ($ref eq 'ARRAY') { |
108 | return [ map $self->_deobjectify($_), @$data ]; |
109 | } else { |
110 | die "Can't collapse reftype $ref"; |
111 | } |
112 | } |
113 | return $data; # plain scalar |
114 | } |
115 | |
116 | sub _receive_data_from { |
117 | my ($self, $fh) = @_; |
118 | my $rb = $self->_receive_data_buffer; |
119 | if (sysread($self->read_fh, $$rb, 1024, length($$rb)) > 0) { |
120 | while ($$rb =~ s/^(.*)\n//) { |
121 | $self->_receive($1); |
122 | } |
123 | } |
124 | } |
125 | |
126 | sub _receive { |
127 | my ($self, $data) = @_; |
128 | my ($type, @rest) = eval { @{$self->_deserialize($data)} } |
129 | or do { warn "Deserialize failed for ${data}: $@"; return }; |
130 | eval { $self->${\"receive_${type}"}(@rest); 1 } |
131 | or do { warn "Receive failed for ${data}: $@"; return }; |
132 | return; |
133 | } |
134 | |
135 | sub receive_free { |
136 | my ($self, $id) = @_; |
137 | delete $self->local_objects_by_id->{$id}; |
138 | return; |
139 | } |
140 | |
141 | sub receive_call { |
142 | my ($self, $future, $id, @rest) = @_; |
143 | my $local = $self->local_objects_by_id->{$id} |
144 | or do { $future->fail("No such object $id"); return }; |
145 | $self->_invoke($future, $local, @rest); |
146 | } |
147 | |
148 | sub receive_class_call { |
149 | my ($self, $future, $class, @rest) = @_; |
150 | eval { use_module($class) } |
151 | or do { $future->fail("Error loading ${class}: $@"); return }; |
152 | $self->_invoke($future, $class, @rest); |
153 | } |
154 | |
155 | sub _invoke { |
156 | my ($self, $future, $local, $method, @args) = @_; |
157 | eval { $future->done($local->$method(@args)); 1 } |
158 | or do { $future->fail($@); return; }; |
159 | return; |
160 | } |
161 | |
162 | sub DEMOLISH { |
163 | my ($self, $gd) = @_; |
164 | return if $gd; |
165 | Object::Remote->current_loop |
166 | ->unwatch_io( |
167 | handle => $self->receive_from_fh, |
168 | on_read_ready => 1 |
169 | ); |
170 | } |
171 | |
172 | 1; |