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 | |
6db5156c |
13 | our $DEBUG = !!$ENV{OBJECT_REMOTE_DEBUG}; |
ad4f54b2 |
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 | |
8ba4f2e3 |
37 | has is_ready => (is => 'rwp', trigger => sub { |
38 | my ($self, $value) = @_; |
39 | $self->ready_future->done if $value; |
40 | }); |
41 | |
42 | has ready_future => (is => 'lazy'); |
43 | |
44 | sub _build_ready_future { CPS::Future->new } |
45 | |
9e72f0cf |
46 | has _receive_data_buffer => (is => 'ro', default => sub { my $x = ''; \$x }); |
47 | |
48 | has local_objects_by_id => (is => 'ro', default => sub { {} }); |
49 | |
2065b08b |
50 | has remote_objects_by_id => (is => 'ro', default => sub { {} }); |
9e72f0cf |
51 | |
52 | has _json => ( |
53 | is => 'lazy', |
54 | handles => { |
55 | _deserialize => 'decode', |
56 | _encode => 'encode', |
57 | }, |
58 | ); |
59 | |
60 | sub _build__json { |
61 | weaken(my $self = shift); |
62 | my $remotes = $self->remote_objects_by_id; |
63 | JSON::PP->new->filter_json_single_key_object( |
64 | __remote_object__ => sub { |
65 | my $id = shift; |
2065b08b |
66 | return bless({}, 'Object::Remote::Null') if $id eq 'NULL'; |
9e72f0cf |
67 | ( |
68 | $remotes->{$id} |
676438a1 |
69 | or Object::Remote::Handle->new(connection => $self, id => $id) |
9e72f0cf |
70 | )->proxy; |
71 | } |
72 | ); |
73 | } |
74 | |
84b04178 |
75 | BEGIN { |
76 | unshift our @Guess, sub { blessed($_[0]) ? $_[0] : undef }; |
77 | eval { require Object::Remote::Connector::Local }; |
a9fdb55e |
78 | eval { require Object::Remote::Connector::LocalSudo }; |
84b04178 |
79 | eval { require Object::Remote::Connector::SSH }; |
80 | } |
81 | |
82 | sub new_from_spec { |
83 | my ($class, $spec) = @_; |
84 | foreach my $poss (do { our @Guess }) { |
85 | if (my $obj = $poss->($spec)) { return $obj } |
86 | } |
87 | die "Couldn't figure out what to do with ${spec}"; |
88 | } |
89 | |
9e72f0cf |
90 | sub register_remote { |
91 | my ($self, $remote) = @_; |
92 | weaken($self->remote_objects_by_id->{$remote->id} = $remote); |
93 | return $remote; |
94 | } |
95 | |
8ba4f2e3 |
96 | sub await_ready { |
97 | my ($self) = @_; |
98 | return if $self->is_ready; |
99 | await_future($self->ready_future); |
100 | } |
101 | |
9e72f0cf |
102 | sub send_free { |
103 | my ($self, $id) = @_; |
104 | delete $self->remote_objects_by_id->{$id}; |
105 | $self->_send([ free => $id ]); |
106 | } |
107 | |
108 | sub send { |
109 | my ($self, $type, @call) = @_; |
110 | |
111 | unshift @call, $type => my $future = CPS::Future->new; |
112 | |
113 | $self->_send(\@call); |
114 | |
115 | return $future; |
116 | } |
117 | |
9d804009 |
118 | sub send_discard { |
119 | my ($self, $type, @call) = @_; |
120 | |
2065b08b |
121 | unshift @call, $type => { __remote_object__ => 'NULL' }; |
9d804009 |
122 | |
123 | $self->_send(\@call); |
124 | } |
125 | |
9e72f0cf |
126 | sub _send { |
127 | my ($self, $to_send) = @_; |
128 | |
8ba4f2e3 |
129 | $self->await_ready unless $self->is_ready; |
130 | |
9d804009 |
131 | print { $self->send_to_fh } $self->_serialize($to_send)."\n"; |
9e72f0cf |
132 | } |
133 | |
134 | sub _serialize { |
135 | my ($self, $data) = @_; |
136 | local our @New_Ids; |
9d804009 |
137 | return eval { |
ad4f54b2 |
138 | my $flat = $self->_encode($self->_deobjectify($data)); |
139 | warn "$$ >>> ${flat}\n" if $DEBUG; |
140 | $flat; |
70a578ac |
141 | } || do { |
9d804009 |
142 | my $err = $@; # won't get here if the eval doesn't die |
143 | # don't keep refs to new things |
144 | delete @{$self->local_objects_by_id}{@New_Ids}; |
145 | die "Error serializing: $err"; |
146 | }; |
9e72f0cf |
147 | } |
148 | |
149 | sub _deobjectify { |
150 | my ($self, $data) = @_; |
151 | if (blessed($data)) { |
152 | my $id = refaddr($data); |
153 | $self->local_objects_by_id->{$id} ||= do { |
154 | push our(@New_Ids), $id; |
155 | $data; |
156 | }; |
157 | return +{ __remote_object__ => $id }; |
158 | } elsif (my $ref = ref($data)) { |
159 | if ($ref eq 'HASH') { |
160 | return +{ map +($_ => $self->_deobjectify($data->{$_})), keys %$data }; |
161 | } elsif ($ref eq 'ARRAY') { |
162 | return [ map $self->_deobjectify($_), @$data ]; |
163 | } else { |
164 | die "Can't collapse reftype $ref"; |
165 | } |
166 | } |
167 | return $data; # plain scalar |
168 | } |
169 | |
170 | sub _receive_data_from { |
171 | my ($self, $fh) = @_; |
172 | my $rb = $self->_receive_data_buffer; |
8ba4f2e3 |
173 | my $ready = $self->is_ready; |
9d804009 |
174 | if (sysread($fh, $$rb, 1024, length($$rb)) > 0) { |
9e72f0cf |
175 | while ($$rb =~ s/^(.*)\n//) { |
8ba4f2e3 |
176 | if ($ready) { |
177 | $self->_receive($1); |
178 | } else { |
179 | my $line = $1; |
180 | die "New remote container did not send Shere - got ${line}" |
181 | unless $line eq "Shere"; |
182 | $self->_set_is_ready($ready = 1); |
183 | } |
9e72f0cf |
184 | } |
ad4f54b2 |
185 | } else { |
dc28afe8 |
186 | $self->on_close->done(); |
9e72f0cf |
187 | } |
188 | } |
189 | |
190 | sub _receive { |
ad4f54b2 |
191 | my ($self, $flat) = @_; |
192 | warn "$$ <<< $flat\n" if $DEBUG; |
193 | my ($type, @rest) = eval { @{$self->_deserialize($flat)} } |
194 | or do { warn "Deserialize failed for ${flat}: $@"; return }; |
9e72f0cf |
195 | eval { $self->${\"receive_${type}"}(@rest); 1 } |
ad4f54b2 |
196 | or do { warn "Receive failed for ${flat}: $@"; return }; |
9e72f0cf |
197 | return; |
198 | } |
199 | |
200 | sub receive_free { |
201 | my ($self, $id) = @_; |
9d804009 |
202 | delete $self->local_objects_by_id->{$id} |
203 | or warn "Free: no such object $id"; |
9e72f0cf |
204 | return; |
205 | } |
206 | |
207 | sub receive_call { |
208 | my ($self, $future, $id, @rest) = @_; |
8131a88a |
209 | $future->{method} = 'call_discard_free'; |
9e72f0cf |
210 | my $local = $self->local_objects_by_id->{$id} |
211 | or do { $future->fail("No such object $id"); return }; |
212 | $self->_invoke($future, $local, @rest); |
213 | } |
214 | |
8131a88a |
215 | sub receive_call_free { |
216 | my ($self, $future, $id, @rest) = @_; |
84b04178 |
217 | $self->receive_call($future, $id, undef, @rest); |
8131a88a |
218 | $self->receive_free($id); |
219 | } |
220 | |
9e72f0cf |
221 | sub receive_class_call { |
222 | my ($self, $future, $class, @rest) = @_; |
8131a88a |
223 | $future->{method} = 'call_discard_free'; |
9e72f0cf |
224 | eval { use_module($class) } |
225 | or do { $future->fail("Error loading ${class}: $@"); return }; |
226 | $self->_invoke($future, $class, @rest); |
227 | } |
228 | |
229 | sub _invoke { |
84b04178 |
230 | my ($self, $future, $local, $ctx, $method, @args) = @_; |
dc28afe8 |
231 | if ($method =~ /^start::/) { |
232 | my $f = $local->$method(@args); |
233 | $f->on_done(sub { undef($f); $future->done(@_) }); |
3f1f1e66 |
234 | return unless $f; |
dc28afe8 |
235 | $f->on_fail(sub { undef($f); $future->fail(@_) }); |
236 | return; |
237 | } |
84b04178 |
238 | my $do = sub { $local->$method(@args) }; |
239 | eval { |
240 | $future->done( |
241 | defined($ctx) |
242 | ? ($ctx ? $do->() : scalar($do->())) |
243 | : do { $do->(); () } |
244 | ); |
245 | 1; |
246 | } or do { $future->fail($@); return; }; |
9e72f0cf |
247 | return; |
248 | } |
249 | |
250 | sub DEMOLISH { |
251 | my ($self, $gd) = @_; |
252 | return if $gd; |
253 | Object::Remote->current_loop |
254 | ->unwatch_io( |
255 | handle => $self->receive_from_fh, |
256 | on_read_ready => 1 |
257 | ); |
258 | } |
259 | |
260 | 1; |