Commit | Line | Data |
a9fdb55e |
1 | package Object::Remote::Role::Connector::PerlInterpreter; |
2 | |
5953edf6 |
3 | use IPC::Open2; |
90a3a7f2 |
4 | use IPC::Open3; |
4c8c83d7 |
5 | use IO::Handle; |
b1f39f94 |
6 | use Symbol; |
c3d5ef8a |
7 | use Object::Remote::Logging qw( :log :dlog router ); |
a9fdb55e |
8 | use Object::Remote::ModuleSender; |
9 | use Object::Remote::Handle; |
fbd3b8ec |
10 | use Object::Remote::Future; |
69aaad21 |
11 | use Scalar::Util qw(blessed weaken); |
a9fdb55e |
12 | use Moo::Role; |
13 | |
14 | with 'Object::Remote::Role::Connector'; |
15 | |
03f41c0e |
16 | has module_sender => (is => 'lazy'); |
7985ed9e |
17 | has ulimit => ( is => 'ro'); |
18 | has nice => ( is => 'ro'); |
19 | has watchdog_timeout => ( is => 'ro', required => 1, default => sub { undef }); |
e5b3f03f |
20 | has perl_command => (is => 'lazy'); |
7985ed9e |
21 | has pid => (is => 'rwp'); |
22 | has connection_id => (is => 'rwp'); |
69aaad21 |
23 | |
5953edf6 |
24 | #if no child_stderr file handle is specified then stderr |
25 | #of the child will be connected to stderr of the parent |
69aaad21 |
26 | has stderr => ( is => 'rw', default => sub { undef } ); |
03f41c0e |
27 | |
28 | sub _build_module_sender { |
18e789ab |
29 | my ($hook) = |
30 | grep {blessed($_) && $_->isa('Object::Remote::ModuleLoader::Hook') } |
31 | @INC; |
03f41c0e |
32 | return $hook ? $hook->sender : Object::Remote::ModuleSender->new; |
33 | } |
34 | |
1a7f821f |
35 | sub _build_perl_command { |
c0d4da69 |
36 | my ($self) = @_; |
1a7f821f |
37 | my $nice = $self->nice; |
364015c9 |
38 | my $ulimit = $self->ulimit; |
c0d4da69 |
39 | my $perl_path = 'perl'; |
40 | my $shell_code = ''; |
41 | |
1a7f821f |
42 | if (defined($ulimit)) { |
c0d4da69 |
43 | $shell_code .= "ulimit $ulimit || exit 1; "; |
1a7f821f |
44 | } |
c0d4da69 |
45 | |
1a7f821f |
46 | if (defined($nice)) { |
47 | $shell_code .= "nice -n $nice "; |
48 | } |
c0d4da69 |
49 | |
1013b46a |
50 | if (defined($ENV{OBJECT_REMOTE_PERL_BIN})) { |
51 | log_debug { "Using OBJECT_REMOTE_PERL_BIN environment variable as perl path" }; |
52 | $perl_path = $ENV{OBJECT_REMOTE_PERL_BIN}; |
c0d4da69 |
53 | } |
54 | |
55 | $shell_code .= $perl_path . ' -'; |
56 | |
57 | return [ 'bash', '-c', $shell_code ]; |
1a7f821f |
58 | } |
498c4ad5 |
59 | |
03f41c0e |
60 | around connect => sub { |
61 | my ($orig, $self) = (shift, shift); |
fbd3b8ec |
62 | my $f = $self->$start::start($orig => @_); |
63 | return future { |
64 | $f->on_done(sub { |
65 | my ($conn) = $f->get; |
7985ed9e |
66 | $self->_setup_watchdog_reset($conn); |
67 | my $sub = $conn->remote_sub('Object::Remote::Logging::init_remote_logging'); |
c3d5ef8a |
68 | $sub->('Object::Remote::Logging', router => router(), connection_id => $conn->_id); |
fbd3b8ec |
69 | Object::Remote::Handle->new( |
70 | connection => $conn, |
71 | class => 'Object::Remote::ModuleLoader', |
72 | args => { module_sender => $self->module_sender } |
73 | )->disarm_free; |
74 | require Object::Remote::Prompt; |
75 | Object::Remote::Prompt::maybe_set_prompt_command_on($conn); |
76 | }); |
77 | $f; |
78 | } 2; |
a9fdb55e |
79 | }; |
80 | |
498c4ad5 |
81 | sub final_perl_command { shift->perl_command } |
a9fdb55e |
82 | |
7efea51f |
83 | sub _start_perl { |
a9fdb55e |
84 | my $self = shift; |
5953edf6 |
85 | my $given_stderr = $self->stderr; |
86 | my $foreign_stderr; |
87 | |
f7175e05 |
88 | Dlog_verbose { |
89 | s/\n/ /g; "invoking connection to perl interpreter using command line: $_" |
90 | } @{$self->final_perl_command}; |
8ed52376 |
91 | |
5953edf6 |
92 | if (defined($given_stderr)) { |
c023aad2 |
93 | #if the stderr data goes to an existing file handle |
94 | #an anonymous file handle is required |
95 | #as the other half of a pipe style file handle pair |
96 | #so the file handles can go into the run loop |
97 | $foreign_stderr = gensym(); |
5953edf6 |
98 | } else { |
c023aad2 |
99 | #if no file handle has been specified |
100 | #for the child's stderr then connect |
101 | #the child stderr to the parent stderr |
102 | $foreign_stderr = ">&STDERR"; |
5953edf6 |
103 | } |
104 | |
105 | my $pid = open3( |
106 | my $foreign_stdin, |
107 | my $foreign_stdout, |
108 | $foreign_stderr, |
109 | @{$self->final_perl_command}, |
110 | ) or die "Failed to run perl at '$_[0]': $!"; |
111 | |
7985ed9e |
112 | $self->_set_pid($pid); |
113 | |
5953edf6 |
114 | if (defined($given_stderr)) { |
c023aad2 |
115 | Dlog_debug { "Child process STDERR is being handled via run loop" }; |
5953edf6 |
116 | |
c023aad2 |
117 | Object::Remote->current_loop |
118 | ->watch_io( |
119 | handle => $foreign_stderr, |
120 | on_read_ready => sub { |
121 | my $buf = ''; |
122 | my $len = sysread($foreign_stderr, $buf, 32768); |
123 | if (!defined($len) or $len == 0) { |
124 | log_trace { "Got EOF or error on child stderr, removing from watcher" }; |
125 | $self->stderr(undef); |
126 | Object::Remote->current_loop->unwatch_io( |
127 | handle => $foreign_stderr, |
128 | on_read_ready => 1 |
129 | ); |
5953edf6 |
130 | } else { |
c023aad2 |
131 | Dlog_trace { "got $len characters of stderr data for connection" }; |
132 | print $given_stderr $buf or die "could not send stderr data: $!"; |
5953edf6 |
133 | } |
b51a8453 |
134 | } |
5953edf6 |
135 | ); |
136 | } |
137 | |
69aaad21 |
138 | return ($foreign_stdin, $foreign_stdout, $pid); |
7efea51f |
139 | } |
140 | |
141 | sub _open2_for { |
142 | my $self = shift; |
143 | my ($foreign_stdin, $foreign_stdout, $pid) = $self->_start_perl(@_); |
fbd3b8ec |
144 | my $to_send = $self->fatnode_text; |
7985ed9e |
145 | log_debug { my $len = length($to_send); "Sending contents of fat node to remote node; size is '$len' characters" }; |
fbd3b8ec |
146 | Object::Remote->current_loop |
147 | ->watch_io( |
148 | handle => $foreign_stdin, |
149 | on_write_ready => sub { |
07105aca |
150 | my $len = syswrite($foreign_stdin, $to_send, 32768); |
fbd3b8ec |
151 | if (defined $len) { |
152 | substr($to_send, 0, $len) = ''; |
153 | } |
154 | # if the stdin went away, we'll never get Shere |
155 | # so it's not a big deal to simply give up on !defined |
b1f39f94 |
156 | if (!defined($len) or 0 == length($to_send)) { |
0511910e |
157 | log_trace { "Got EOF or error when writing fatnode data to filehandle, unwatching it" }; |
fbd3b8ec |
158 | Object::Remote->current_loop |
159 | ->unwatch_io( |
160 | handle => $foreign_stdin, |
161 | on_write_ready => 1 |
c023aad2 |
162 | ); |
0511910e |
163 | } else { |
164 | log_trace { "Sent $len bytes of fatnode data to remote side" }; |
fbd3b8ec |
165 | } |
166 | } |
167 | ); |
a9fdb55e |
168 | return ($foreign_stdin, $foreign_stdout, $pid); |
169 | } |
170 | |
69aaad21 |
171 | sub _setup_watchdog_reset { |
c023aad2 |
172 | my ($self, $conn) = @_; |
173 | my $timer_id; |
69aaad21 |
174 | |
c023aad2 |
175 | return unless $self->watchdog_timeout; |
69aaad21 |
176 | |
c023aad2 |
177 | Dlog_trace { "Creating Watchdog management timer for connection id $_" } $conn->_id; |
bd20b1bf |
178 | |
c023aad2 |
179 | weaken($conn); |
bd20b1bf |
180 | |
c023aad2 |
181 | $timer_id = Object::Remote->current_loop->watch_time( |
182 | every => $self->watchdog_timeout / 3, |
183 | code => sub { |
184 | unless(defined($conn)) { |
185 | log_trace { "Weak reference to connection in Watchdog was lost, terminating update timer $timer_id" }; |
186 | Object::Remote->current_loop->unwatch_time($timer_id); |
187 | return; |
188 | } |
69aaad21 |
189 | |
c023aad2 |
190 | Dlog_trace { "Reseting Watchdog for connection id $_" } $conn->_id; |
191 | #we do not want to block in the run loop so send the |
192 | #update off and ignore any result, we don't need it |
193 | #anyway |
194 | $conn->send_class_call(0, 'Object::Remote::WatchDog', 'reset'); |
195 | } |
196 | ); |
69aaad21 |
197 | } |
198 | |
b1cbd5be |
199 | sub fatnode_text { |
200 | my ($self) = @_; |
2dc23780 |
201 | my $connection_timeout = $self->timeout; |
202 | my $watchdog_timeout = $self->watchdog_timeout; |
b1cbd5be |
203 | my $text = ''; |
69aaad21 |
204 | |
205 | require Object::Remote::FatNode; |
206 | |
2dc23780 |
207 | if (defined($connection_timeout)) { |
208 | $text .= "alarm($connection_timeout);\n"; |
209 | } |
210 | |
211 | if (defined($watchdog_timeout)) { |
7985ed9e |
212 | $text .= "my \$WATCHDOG_TIMEOUT = $watchdog_timeout;\n"; |
bd20b1bf |
213 | } else { |
2dc23780 |
214 | $text .= "my \$WATCHDOG_TIMEOUT = undef;\n"; |
69aaad21 |
215 | } |
bd20b1bf |
216 | |
7985ed9e |
217 | $text .= '$Object::Remote::FatNode::REMOTE_NODE = "1";' . "\n"; |
218 | |
b1cbd5be |
219 | $text .= <<'END'; |
220 | $INC{'Object/Remote/FatNode.pm'} = __FILE__; |
221 | $Object::Remote::FatNode::DATA = <<'ENDFAT'; |
222 | END |
fbd3b8ec |
223 | $text .= do { no warnings 'once'; $Object::Remote::FatNode::DATA }; |
b1cbd5be |
224 | $text .= "ENDFAT\n"; |
225 | $text .= <<'END'; |
226 | eval $Object::Remote::FatNode::DATA; |
1a2d795f |
227 | die $@ if $@; |
b1cbd5be |
228 | END |
69aaad21 |
229 | |
b1cbd5be |
230 | $text .= "__END__\n"; |
231 | return $text; |
232 | } |
233 | |
a9fdb55e |
234 | 1; |