Commit | Line | Data |
9e72f0cf |
1 | package Object::Remote::Connection; |
2 | |
dc28afe8 |
3 | use Object::Remote::Future; |
9d804009 |
4 | use Object::Remote::Null; |
676438a1 |
5 | use Object::Remote::Handle; |
9e72f0cf |
6 | use Object::Remote; |
7 | use IO::Handle; |
8 | use Module::Runtime qw(use_module); |
9 | use Scalar::Util qw(weaken blessed refaddr); |
10 | use JSON::PP qw(encode_json); |
11 | use Moo; |
12 | |
ad4f54b2 |
13 | our $DEBUG; |
14 | |
9e72f0cf |
15 | has send_to_fh => ( |
16 | is => 'ro', required => 1, |
17 | trigger => sub { $_[1]->autoflush(1) }, |
18 | ); |
19 | |
20 | has receive_from_fh => ( |
21 | is => 'ro', required => 1, |
22 | trigger => sub { |
23 | my ($self, $fh) = @_; |
24 | weaken($self); |
25 | Object::Remote->current_loop |
26 | ->watch_io( |
27 | handle => $fh, |
28 | on_read_ready => sub { $self->_receive_data_from($fh) } |
29 | ); |
30 | }, |
31 | ); |
32 | |
ad4f54b2 |
33 | has on_close => (is => 'rw', default => sub {}); |
34 | |
47c83a13 |
35 | has child_pid => (is => 'ro'); |
36 | |
9e72f0cf |
37 | has _receive_data_buffer => (is => 'ro', default => sub { my $x = ''; \$x }); |
38 | |
39 | has local_objects_by_id => (is => 'ro', default => sub { {} }); |
40 | |
2065b08b |
41 | has remote_objects_by_id => (is => 'ro', default => sub { {} }); |
9e72f0cf |
42 | |
43 | has _json => ( |
44 | is => 'lazy', |
45 | handles => { |
46 | _deserialize => 'decode', |
47 | _encode => 'encode', |
48 | }, |
49 | ); |
50 | |
51 | sub _build__json { |
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 { |
56 | my $id = shift; |
2065b08b |
57 | return bless({}, 'Object::Remote::Null') if $id eq 'NULL'; |
9e72f0cf |
58 | ( |
59 | $remotes->{$id} |
676438a1 |
60 | or Object::Remote::Handle->new(connection => $self, id => $id) |
9e72f0cf |
61 | )->proxy; |
62 | } |
63 | ); |
64 | } |
65 | |
84b04178 |
66 | BEGIN { |
67 | unshift our @Guess, sub { blessed($_[0]) ? $_[0] : undef }; |
68 | eval { require Object::Remote::Connector::Local }; |
69 | eval { require Object::Remote::Connector::SSH }; |
70 | } |
71 | |
72 | sub new_from_spec { |
73 | my ($class, $spec) = @_; |
74 | foreach my $poss (do { our @Guess }) { |
75 | if (my $obj = $poss->($spec)) { return $obj } |
76 | } |
77 | die "Couldn't figure out what to do with ${spec}"; |
78 | } |
79 | |
9e72f0cf |
80 | sub register_remote { |
81 | my ($self, $remote) = @_; |
82 | weaken($self->remote_objects_by_id->{$remote->id} = $remote); |
83 | return $remote; |
84 | } |
85 | |
86 | sub send_free { |
87 | my ($self, $id) = @_; |
88 | delete $self->remote_objects_by_id->{$id}; |
89 | $self->_send([ free => $id ]); |
90 | } |
91 | |
92 | sub send { |
93 | my ($self, $type, @call) = @_; |
94 | |
95 | unshift @call, $type => my $future = CPS::Future->new; |
96 | |
97 | $self->_send(\@call); |
98 | |
99 | return $future; |
100 | } |
101 | |
9d804009 |
102 | sub send_discard { |
103 | my ($self, $type, @call) = @_; |
104 | |
2065b08b |
105 | unshift @call, $type => { __remote_object__ => 'NULL' }; |
9d804009 |
106 | |
107 | $self->_send(\@call); |
108 | } |
109 | |
9e72f0cf |
110 | sub _send { |
111 | my ($self, $to_send) = @_; |
112 | |
9d804009 |
113 | print { $self->send_to_fh } $self->_serialize($to_send)."\n"; |
9e72f0cf |
114 | } |
115 | |
116 | sub _serialize { |
117 | my ($self, $data) = @_; |
118 | local our @New_Ids; |
9d804009 |
119 | return eval { |
ad4f54b2 |
120 | my $flat = $self->_encode($self->_deobjectify($data)); |
121 | warn "$$ >>> ${flat}\n" if $DEBUG; |
122 | $flat; |
9d804009 |
123 | } or do { |
124 | my $err = $@; # won't get here if the eval doesn't die |
125 | # don't keep refs to new things |
126 | delete @{$self->local_objects_by_id}{@New_Ids}; |
127 | die "Error serializing: $err"; |
128 | }; |
9e72f0cf |
129 | } |
130 | |
131 | sub _deobjectify { |
132 | my ($self, $data) = @_; |
133 | if (blessed($data)) { |
134 | my $id = refaddr($data); |
135 | $self->local_objects_by_id->{$id} ||= do { |
136 | push our(@New_Ids), $id; |
137 | $data; |
138 | }; |
139 | return +{ __remote_object__ => $id }; |
140 | } elsif (my $ref = ref($data)) { |
141 | if ($ref eq 'HASH') { |
142 | return +{ map +($_ => $self->_deobjectify($data->{$_})), keys %$data }; |
143 | } elsif ($ref eq 'ARRAY') { |
144 | return [ map $self->_deobjectify($_), @$data ]; |
145 | } else { |
146 | die "Can't collapse reftype $ref"; |
147 | } |
148 | } |
149 | return $data; # plain scalar |
150 | } |
151 | |
152 | sub _receive_data_from { |
153 | my ($self, $fh) = @_; |
154 | my $rb = $self->_receive_data_buffer; |
9d804009 |
155 | if (sysread($fh, $$rb, 1024, length($$rb)) > 0) { |
9e72f0cf |
156 | while ($$rb =~ s/^(.*)\n//) { |
157 | $self->_receive($1); |
158 | } |
ad4f54b2 |
159 | } else { |
dc28afe8 |
160 | $self->on_close->done(); |
9e72f0cf |
161 | } |
162 | } |
163 | |
164 | sub _receive { |
ad4f54b2 |
165 | my ($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 }; |
9e72f0cf |
169 | eval { $self->${\"receive_${type}"}(@rest); 1 } |
ad4f54b2 |
170 | or do { warn "Receive failed for ${flat}: $@"; return }; |
9e72f0cf |
171 | return; |
172 | } |
173 | |
174 | sub receive_free { |
175 | my ($self, $id) = @_; |
9d804009 |
176 | delete $self->local_objects_by_id->{$id} |
177 | or warn "Free: no such object $id"; |
9e72f0cf |
178 | return; |
179 | } |
180 | |
181 | sub receive_call { |
182 | my ($self, $future, $id, @rest) = @_; |
8131a88a |
183 | $future->{method} = 'call_discard_free'; |
9e72f0cf |
184 | my $local = $self->local_objects_by_id->{$id} |
185 | or do { $future->fail("No such object $id"); return }; |
186 | $self->_invoke($future, $local, @rest); |
187 | } |
188 | |
8131a88a |
189 | sub receive_call_free { |
190 | my ($self, $future, $id, @rest) = @_; |
84b04178 |
191 | $self->receive_call($future, $id, undef, @rest); |
8131a88a |
192 | $self->receive_free($id); |
193 | } |
194 | |
9e72f0cf |
195 | sub receive_class_call { |
196 | my ($self, $future, $class, @rest) = @_; |
8131a88a |
197 | $future->{method} = 'call_discard_free'; |
9e72f0cf |
198 | eval { use_module($class) } |
199 | or do { $future->fail("Error loading ${class}: $@"); return }; |
200 | $self->_invoke($future, $class, @rest); |
201 | } |
202 | |
203 | sub _invoke { |
84b04178 |
204 | my ($self, $future, $local, $ctx, $method, @args) = @_; |
dc28afe8 |
205 | if ($method =~ /^start::/) { |
206 | my $f = $local->$method(@args); |
207 | $f->on_done(sub { undef($f); $future->done(@_) }); |
3f1f1e66 |
208 | return unless $f; |
dc28afe8 |
209 | $f->on_fail(sub { undef($f); $future->fail(@_) }); |
210 | return; |
211 | } |
84b04178 |
212 | my $do = sub { $local->$method(@args) }; |
213 | eval { |
214 | $future->done( |
215 | defined($ctx) |
216 | ? ($ctx ? $do->() : scalar($do->())) |
217 | : do { $do->(); () } |
218 | ); |
219 | 1; |
220 | } or do { $future->fail($@); return; }; |
9e72f0cf |
221 | return; |
222 | } |
223 | |
224 | sub DEMOLISH { |
225 | my ($self, $gd) = @_; |
226 | return if $gd; |
227 | Object::Remote->current_loop |
228 | ->unwatch_io( |
229 | handle => $self->receive_from_fh, |
230 | on_read_ready => 1 |
231 | ); |
232 | } |
233 | |
234 | 1; |