Commit | Line | Data |
a9fdb55e |
1 | package Object::Remote::Role::Connector::PerlInterpreter; |
2 | |
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3 | use IPC::Open2; |
90a3a7f2 |
4 | use IPC::Open3; |
4c8c83d7 |
5 | use IO::Handle; |
b1f39f94 |
6 | use Symbol; |
69aaad21 |
7 | use Object::Remote::Logging qw( :log :dlog ); |
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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'); |
1a7f821f |
17 | has ulimit => ( is => 'ro' ); |
18 | has nice => ( is => 'ro' ); |
e5b3f03f |
19 | has watchdog_timeout => ( is => 'ro', required => 1, default => sub { undef } ); |
20 | has perl_command => (is => 'lazy'); |
69aaad21 |
21 | |
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22 | #if no child_stderr file handle is specified then stderr |
23 | #of the child will be connected to stderr of the parent |
69aaad21 |
24 | has stderr => ( is => 'rw', default => sub { undef } ); |
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25 | |
26 | sub _build_module_sender { |
18e789ab |
27 | my ($hook) = |
28 | grep {blessed($_) && $_->isa('Object::Remote::ModuleLoader::Hook') } |
29 | @INC; |
03f41c0e |
30 | return $hook ? $hook->sender : Object::Remote::ModuleSender->new; |
31 | } |
32 | |
1a7f821f |
33 | #SSH requires the entire remote command to be |
34 | #given as one single argument to the ssh |
35 | #command line program so this jumps through |
36 | #some hoops |
e5b3f03f |
37 | |
38 | #TODO this is SSH's problem not perl's so move |
39 | #this to the SSH connector |
1a7f821f |
40 | sub _build_perl_command { |
41 | my ($self) = @_; |
42 | my $nice = $self->nice; |
43 | my $ulimit = $self->ulimit; |
44 | my $shell_code = 'sh -c "'; |
45 | |
46 | if (defined($ulimit)) { |
47 | $shell_code .= "ulimit -v $ulimit; "; |
48 | } |
49 | |
50 | if (defined($nice)) { |
51 | $shell_code .= "nice -n $nice "; |
52 | } |
53 | |
54 | $shell_code .= 'perl -"'; |
55 | |
56 | return [ $shell_code ]; |
57 | } |
498c4ad5 |
58 | |
03f41c0e |
59 | around connect => sub { |
60 | my ($orig, $self) = (shift, shift); |
fbd3b8ec |
61 | my $f = $self->$start::start($orig => @_); |
62 | return future { |
63 | $f->on_done(sub { |
64 | my ($conn) = $f->get; |
69aaad21 |
65 | $self->_setup_watchdog_reset($conn); |
23591f5f |
66 | my $sub = $conn->remote_sub('Object::Remote::Logging::init_logging_forwarding'); |
67 | $sub->('Object::Remote::Logging', Object::Remote::Logging->arg_router); |
fbd3b8ec |
68 | Object::Remote::Handle->new( |
69 | connection => $conn, |
70 | class => 'Object::Remote::ModuleLoader', |
71 | args => { module_sender => $self->module_sender } |
72 | )->disarm_free; |
73 | require Object::Remote::Prompt; |
74 | Object::Remote::Prompt::maybe_set_prompt_command_on($conn); |
75 | }); |
76 | $f; |
77 | } 2; |
a9fdb55e |
78 | }; |
79 | |
498c4ad5 |
80 | sub final_perl_command { shift->perl_command } |
a9fdb55e |
81 | |
7efea51f |
82 | sub _start_perl { |
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83 | my $self = shift; |
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84 | my $given_stderr = $self->stderr; |
85 | my $foreign_stderr; |
86 | |
07105aca |
87 | Dlog_debug { "invoking connection to perl interpreter using command line: $_" } @{$self->final_perl_command}; |
8ed52376 |
88 | |
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89 | if (defined($given_stderr)) { |
69aaad21 |
90 | #if the stderr data goes to an existing file handle |
62796659 |
91 | #an anonymous file handle is required |
69aaad21 |
92 | #as the other half of a pipe style file handle pair |
93 | #so the file handles can go into the run loop |
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94 | $foreign_stderr = gensym(); |
95 | } else { |
69aaad21 |
96 | #if no file handle has been specified |
97 | #for the child's stderr then connect |
98 | #the child stderr to the parent stderr |
5953edf6 |
99 | $foreign_stderr = ">&STDERR"; |
100 | } |
101 | |
102 | my $pid = open3( |
103 | my $foreign_stdin, |
104 | my $foreign_stdout, |
105 | $foreign_stderr, |
106 | @{$self->final_perl_command}, |
107 | ) or die "Failed to run perl at '$_[0]': $!"; |
108 | |
109 | if (defined($given_stderr)) { |
b1f39f94 |
110 | Dlog_debug { "Child process STDERR is being handled via run loop" }; |
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111 | |
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112 | Object::Remote->current_loop |
113 | ->watch_io( |
114 | handle => $foreign_stderr, |
115 | on_read_ready => sub { |
116 | my $buf = ''; |
117 | my $len = sysread($foreign_stderr, $buf, 32768); |
b1f39f94 |
118 | if (!defined($len) or $len == 0) { |
5953edf6 |
119 | log_trace { "Got EOF or error on child stderr, removing from watcher" }; |
120 | $self->stderr(undef); |
121 | Object::Remote->current_loop |
122 | ->unwatch_io( |
123 | handle => $foreign_stderr, |
124 | on_read_ready => 1 |
125 | ); |
126 | } else { |
127 | Dlog_trace { "got $len characters of stderr data for connection" }; |
128 | print $given_stderr $buf or die "could not send stderr data: $!"; |
129 | } |
b51a8453 |
130 | } |
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131 | ); |
132 | } |
133 | |
69aaad21 |
134 | return ($foreign_stdin, $foreign_stdout, $pid); |
7efea51f |
135 | } |
136 | |
137 | sub _open2_for { |
138 | my $self = shift; |
139 | my ($foreign_stdin, $foreign_stdout, $pid) = $self->_start_perl(@_); |
fbd3b8ec |
140 | my $to_send = $self->fatnode_text; |
0511910e |
141 | log_debug { my $len = length($to_send); "Sending contents of fat node to remote node; size is '$len' characters" }; |
fbd3b8ec |
142 | Object::Remote->current_loop |
143 | ->watch_io( |
144 | handle => $foreign_stdin, |
145 | on_write_ready => sub { |
07105aca |
146 | my $len = syswrite($foreign_stdin, $to_send, 32768); |
fbd3b8ec |
147 | if (defined $len) { |
148 | substr($to_send, 0, $len) = ''; |
149 | } |
150 | # if the stdin went away, we'll never get Shere |
151 | # so it's not a big deal to simply give up on !defined |
b1f39f94 |
152 | if (!defined($len) or 0 == length($to_send)) { |
0511910e |
153 | log_trace { "Got EOF or error when writing fatnode data to filehandle, unwatching it" }; |
fbd3b8ec |
154 | Object::Remote->current_loop |
155 | ->unwatch_io( |
156 | handle => $foreign_stdin, |
157 | on_write_ready => 1 |
158 | ); |
0511910e |
159 | } else { |
160 | log_trace { "Sent $len bytes of fatnode data to remote side" }; |
fbd3b8ec |
161 | } |
162 | } |
163 | ); |
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164 | return ($foreign_stdin, $foreign_stdout, $pid); |
165 | } |
166 | |
69aaad21 |
167 | sub _setup_watchdog_reset { |
168 | my ($self, $conn) = @_; |
169 | my $timer_id; |
170 | |
171 | return unless $self->watchdog_timeout; |
172 | |
173 | Dlog_trace { "Creating Watchdog management timer for connection id $_" } $conn->_id; |
bd20b1bf |
174 | |
175 | weaken($conn); |
176 | |
69aaad21 |
177 | $timer_id = Object::Remote->current_loop->watch_time( |
161fe284 |
178 | every => $self->watchdog_timeout / 3, |
69aaad21 |
179 | code => sub { |
180 | unless(defined($conn)) { |
181 | log_trace { "Weak reference to connection in Watchdog was lost, terminating update timer $timer_id" }; |
182 | Object::Remote->current_loop->unwatch_time($timer_id); |
183 | return; |
184 | } |
185 | |
bd20b1bf |
186 | Dlog_trace { "Reseting Watchdog for connection id $_" } $conn->_id; |
69aaad21 |
187 | #we do not want to block in the run loop so send the |
188 | #update off and ignore any result, we don't need it |
189 | #anyway |
190 | $conn->send_class_call(0, 'Object::Remote::WatchDog', 'reset'); |
191 | } |
bd20b1bf |
192 | ); |
69aaad21 |
193 | } |
194 | |
b1cbd5be |
195 | sub fatnode_text { |
196 | my ($self) = @_; |
b1cbd5be |
197 | my $text = ''; |
69aaad21 |
198 | |
199 | require Object::Remote::FatNode; |
200 | |
bd20b1bf |
201 | if (defined($self->watchdog_timeout)) { |
202 | $text = "my \$WATCHDOG_TIMEOUT = '" . $self->watchdog_timeout . "';\n"; |
69aaad21 |
203 | $text .= "alarm(\$WATCHDOG_TIMEOUT);\n"; |
bd20b1bf |
204 | } else { |
205 | $text = "my \$WATCHDOG_TIMEOUT = undef;\n"; |
69aaad21 |
206 | } |
bd20b1bf |
207 | |
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208 | $text .= 'BEGIN { $ENV{OBJECT_REMOTE_DEBUG} = 1 }'."\n" |
209 | if $ENV{OBJECT_REMOTE_DEBUG}; |
210 | $text .= <<'END'; |
211 | $INC{'Object/Remote/FatNode.pm'} = __FILE__; |
212 | $Object::Remote::FatNode::DATA = <<'ENDFAT'; |
213 | END |
fbd3b8ec |
214 | $text .= do { no warnings 'once'; $Object::Remote::FatNode::DATA }; |
b1cbd5be |
215 | $text .= "ENDFAT\n"; |
216 | $text .= <<'END'; |
217 | eval $Object::Remote::FatNode::DATA; |
1a2d795f |
218 | die $@ if $@; |
b1cbd5be |
219 | END |
69aaad21 |
220 | |
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221 | $text .= "__END__\n"; |
222 | return $text; |
223 | } |
224 | |
a9fdb55e |
225 | 1; |