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1 | package FCGI::ProcManager; |
2 | |
3 | # Copyright (c) 2000, FundsXpress Financial Network, Inc. |
4 | # This library is free software released under the GNU Lesser General |
5 | # Public License, Version 2.1. Please read the important licensing and |
6 | # disclaimer information included below. |
7 | |
50f238cd |
8 | # $Id: ProcManager.pm,v 1.23 2001/04/23 16:10:11 muaddie Exp $ |
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9 | |
10 | use strict; |
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11 | use Exporter; |
50f238cd |
12 | use POSIX qw(:signal_h); |
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13 | |
50f238cd |
14 | use vars qw($VERSION @ISA @EXPORT_OK %EXPORT_TAGS $Q $SIG_CODEREF); |
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15 | BEGIN { |
3561484c |
16 | $VERSION = '0.24'; |
4ceac1a1 |
17 | @ISA = qw(Exporter); |
c2bbadb3 |
18 | @EXPORT_OK = qw(pm_manage pm_die pm_wait |
4b99386a |
19 | pm_write_pid_file pm_remove_pid_file |
20 | pm_pre_dispatch pm_post_dispatch |
21 | pm_change_process_name pm_received_signal pm_parameter |
22 | pm_warn pm_notify pm_abort pm_exit |
23 | $SIG_CODEREF); |
4ceac1a1 |
24 | $EXPORT_TAGS{all} = \@EXPORT_OK; |
25 | $FCGI::ProcManager::Default = 'FCGI::ProcManager'; |
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26 | } |
27 | |
28 | =head1 NAME |
29 | |
30 | FCGI::ProcManager - functions for managing FastCGI applications. |
31 | |
32 | =head1 SYNOPSIS |
33 | |
518709ed |
34 | # In Object-oriented style. |
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35 | use CGI::Fast; |
36 | use FCGI::ProcManager; |
c2bbadb3 |
37 | my $proc_manager = FCGI::ProcManager->new({ |
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38 | n_processes => 10 |
c2bbadb3 |
39 | }); |
518709ed |
40 | $proc_manager->pm_manage(); |
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41 | while (my $cgi = CGI::Fast->new()) { |
518709ed |
42 | $proc_manager->pm_pre_dispatch(); |
43 | # ... handle the request here ... |
44 | $proc_manager->pm_post_dispatch(); |
45 | } |
46 | |
47 | # This style is also supported: |
48 | use CGI::Fast; |
6e8b04f7 |
49 | use FCGI::ProcManager qw(pm_manage pm_pre_dispatch |
4b99386a |
50 | pm_post_dispatch); |
518709ed |
51 | pm_manage( n_processes => 10 ); |
52 | while (my $cgi = CGI::Fast->new()) { |
53 | pm_pre_dispatch(); |
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54 | #... |
518709ed |
55 | pm_post_dispatch(); |
56 | } |
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57 | |
58 | =head1 DESCRIPTION |
59 | |
518709ed |
60 | FCGI::ProcManager is used to serve as a FastCGI process manager. By |
61 | re-implementing it in perl, developers can more finely tune performance in |
62 | their web applications, and can take advantage of copy-on-write semantics |
63 | prevalent in UNIX kernel process management. The process manager should |
64 | be invoked before the caller''s request loop |
65 | |
66 | The primary routine, C<pm_manage>, enters a loop in which it maintains a |
67 | number of FastCGI servers (via fork(2)), and which reaps those servers |
68 | when they die (via wait(2)). |
69 | |
70 | C<pm_manage> provides too hooks: |
71 | |
72 | C<managing_init> - called just before the manager enters the manager loop. |
73 | C<handling_init> - called just before a server is returns from C<pm_manage> |
74 | |
75 | It is necessary for the caller, when implementing its request loop, to |
76 | insert a call to C<pm_pre_dispatch> at the top of the loop, and then |
77 | 7C<pm_post_dispatch> at the end of the loop. |
78 | |
50f238cd |
79 | =head2 Signal Handling |
80 | |
81 | FCGI::ProcManager attempts to do the right thing for proper shutdowns now. |
82 | |
83 | When it receives a SIGHUP, it sends a SIGTERM to each of its children, and |
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84 | then resumes its normal operations. |
50f238cd |
85 | |
86 | When it receives a SIGTERM, it sends a SIGTERM to each of its children, sets |
87 | an alarm(3) "die timeout" handler, and waits for each of its children to |
88 | die. If all children die before this timeout, process manager exits with |
89 | return status 0. If all children do not die by the time the "die timeout" |
90 | occurs, the process manager sends a SIGKILL to each of the remaining |
91 | children, and exists with return status 1. |
92 | |
93 | In order to get FastCGI servers to exit upon receiving a signal, it is |
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94 | necessary to use its FAIL_ACCEPT_ON_INTR. See L<FCGI>'s description of |
95 | FAIL_ACCEPT_ON_INTR. Unfortunately, if you want/need to use L<CGI::Fast>, it |
96 | is currently necessary to run the latest (at the time of writing) development |
97 | version of FCGI.pm. (>= 0.71_02) |
50f238cd |
98 | |
99 | Otherwise, if you don't, there is a loop around accept(2) which prevents |
100 | os_unix.c OS_Accept() from returning the necessary error when FastCGI |
101 | servers blocking on accept(2) receive the SIGTERM or SIGHUP. |
102 | |
103 | FCGI::ProcManager uses POSIX::sigaction() to override the default SA_RESTART |
104 | policy used for perl's %SIG behavior. Specifically, the process manager |
105 | never uses SA_RESTART, while the child FastCGI servers turn off SA_RESTART |
106 | around the accept(2) loop, but re-enstate it otherwise. |
107 | |
108 | The desired (and implemented) effect is to give a request as big a chance as |
109 | possible to succeed and to delay their exits until after their request, |
110 | while allowing the FastCGI servers waiting for new requests to die right |
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111 | away. |
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112 | |
113 | =head1 METHODS |
114 | |
115 | =head2 new |
116 | |
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117 | class or instance |
118 | (ProcManager) new([hash parameters]) |
119 | |
120 | Constructs a new process manager. Takes an option has of initial parameter |
121 | values, and assigns these to the constructed object HASH, overriding any |
122 | default values. The default parameter values currently are: |
123 | |
124 | role => manager |
125 | start_delay => 0 |
126 | die_timeout => 60 |
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127 | pm_title => 'perl-fcgi-pm' |
c2bbadb3 |
128 | |
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129 | =cut |
130 | |
131 | sub new { |
132 | my ($proto,$init) = @_; |
50f238cd |
133 | $init ||= {}; |
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134 | |
518709ed |
135 | my $this = { |
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136 | role => "manager", |
137 | start_delay => 0, |
138 | die_timeout => 60, |
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139 | pm_title => 'perl-fcgi-pm', |
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140 | %$init |
141 | }; |
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142 | bless $this, ref($proto)||$proto; |
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143 | |
144 | $this->{PIDS} = {}; |
145 | |
50f238cd |
146 | # initialize signal constructions. |
147 | unless ($this->no_signals()) { |
148 | $this->{sigaction_no_sa_restart} = |
4b99386a |
149 | POSIX::SigAction->new('FCGI::ProcManager::sig_sub'); |
50f238cd |
150 | $this->{sigaction_sa_restart} = |
4b99386a |
151 | POSIX::SigAction->new('FCGI::ProcManager::sig_sub',undef,POSIX::SA_RESTART); |
50f238cd |
152 | } |
153 | |
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154 | return $this; |
155 | } |
156 | |
518709ed |
157 | =head1 Manager methods |
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158 | |
159 | =head2 pm_manage |
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160 | |
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161 | instance or export |
162 | (int) pm_manage([hash parameters]) |
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163 | |
164 | DESCRIPTION: |
165 | |
c2bbadb3 |
166 | When this is called by a FastCGI script to manage application servers. It |
167 | defines a sequence of instructions for a process to enter this method and |
168 | begin forking off and managing those handlers, and it defines a sequence of |
169 | instructions to intialize those handlers. |
170 | |
171 | If n_processes < 1, the managing section is subverted, and only the |
172 | handling sequence is executed. |
173 | |
174 | Either returns the return value of pm_die() and/or pm_abort() (which will |
175 | not ever return in general), or returns 1 to the calling script to begin |
176 | handling requests. |
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177 | |
178 | =cut |
179 | |
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180 | sub pm_manage { |
518709ed |
181 | my ($this,%values) = self_or_default(@_); |
182 | map { $this->pm_parameter($_,$values{$_}) } keys %values; |
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183 | |
f969c066 |
184 | local $SIG{CHLD}; # Replace the SIGCHLD default handler in case |
185 | # somebody shit on it whilst loading code. |
186 | |
518709ed |
187 | # skip to handling now if we won't be managing any processes. |
50f238cd |
188 | $this->n_processes() or return; |
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189 | |
518709ed |
190 | # call the (possibly overloaded) management initialization hook. |
191 | $this->role("manager"); |
c146b63d |
192 | $this->managing_init(); |
518709ed |
193 | $this->pm_notify("initialized"); |
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194 | |
518709ed |
195 | my $manager_pid = $$; |
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196 | |
518709ed |
197 | MANAGING_LOOP: while (1) { |
198 | |
518709ed |
199 | $this->n_processes() > 0 or |
200 | return $this->pm_die(); |
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201 | |
518709ed |
202 | # while we have fewer servers than we want. |
203 | PIDS: while (keys(%{$this->{PIDS}}) < $this->n_processes()) { |
204 | |
205 | if (my $pid = fork()) { |
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206 | # the manager remembers the server. |
207 | $this->{PIDS}->{$pid} = { pid=>$pid }; |
518709ed |
208 | $this->pm_notify("server (pid $pid) started"); |
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209 | |
210 | } elsif (! defined $pid) { |
4b99386a |
211 | return $this->pm_abort("fork: $!"); |
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212 | |
213 | } else { |
4b99386a |
214 | $this->{MANAGER_PID} = $manager_pid; |
215 | # the server exits the managing loop. |
216 | last MANAGING_LOOP; |
0baf5fac |
217 | } |
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218 | |
69817330 |
219 | for (my $s = $this->start_delay(); $s > 0; $s -= sleep $s) {}; |
518709ed |
220 | } |
c146b63d |
221 | |
518709ed |
222 | # this should block until the next server dies. |
c2bbadb3 |
223 | $this->pm_wait(); |
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224 | |
225 | }# while 1 |
226 | |
518709ed |
227 | HANDLING: |
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228 | |
c2bbadb3 |
229 | # forget any children we had been collecting. |
230 | delete $this->{PIDS}; |
231 | |
518709ed |
232 | # call the (possibly overloaded) handling init hook |
233 | $this->role("server"); |
c146b63d |
234 | $this->handling_init(); |
518709ed |
235 | $this->pm_notify("initialized"); |
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236 | |
518709ed |
237 | # server returns |
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238 | return 1; |
239 | } |
240 | |
c146b63d |
241 | =head2 managing_init |
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242 | |
c2bbadb3 |
243 | instance |
244 | () managing_init() |
245 | |
246 | DESCRIPTION: |
247 | |
248 | Overrideable method which initializes a process manager. In order to |
249 | handle signals, manage the PID file, and change the process name properly, |
250 | any method which overrides this should call SUPER::managing_init(). |
251 | |
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252 | =cut |
253 | |
c146b63d |
254 | sub managing_init { |
c2bbadb3 |
255 | my ($this) = @_; |
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256 | |
518709ed |
257 | # begin to handle signals. |
50f238cd |
258 | # We do NOT want SA_RESTART in the process manager. |
259 | # -- we want start the shutdown sequence immediately upon SIGTERM. |
260 | unless ($this->no_signals()) { |
261 | sigaction(SIGTERM, $this->{sigaction_no_sa_restart}) or |
4b99386a |
262 | $this->pm_warn("sigaction: SIGTERM: $!"); |
50f238cd |
263 | sigaction(SIGHUP, $this->{sigaction_no_sa_restart}) or |
4b99386a |
264 | $this->pm_warn("sigaction: SIGHUP: $!"); |
50f238cd |
265 | $SIG_CODEREF = sub { $this->sig_manager(@_) }; |
266 | } |
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267 | |
518709ed |
268 | # change the name of this process as it appears in ps(1) output. |
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269 | $this->pm_change_process_name($this->pm_parameter('pm_title')); |
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270 | |
518709ed |
271 | $this->pm_write_pid_file(); |
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272 | } |
273 | |
518709ed |
274 | =head2 pm_die |
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275 | |
c2bbadb3 |
276 | instance or export |
277 | () pm_die(string msg[, int exit_status]) |
278 | |
279 | DESCRIPTION: |
280 | |
281 | This method is called when a process manager receives a notification to |
282 | shut itself down. pm_die() attempts to shutdown the process manager |
283 | gently, sending a SIGTERM to each managed process, waiting die_timeout() |
284 | seconds to reap each process, and then exit gracefully once all children |
285 | are reaped, or to abort if all children are not reaped. |
286 | |
0baf5fac |
287 | =cut |
288 | |
518709ed |
289 | sub pm_die { |
290 | my ($this,$msg,$n) = self_or_default(@_); |
291 | |
292 | # stop handling signals. |
50f238cd |
293 | undef $SIG_CODEREF; |
518709ed |
294 | $SIG{HUP} = 'DEFAULT'; |
295 | $SIG{TERM} = 'DEFAULT'; |
296 | |
297 | $this->pm_remove_pid_file(); |
298 | |
299 | # prepare to die no matter what. |
300 | if (defined $this->die_timeout()) { |
50f238cd |
301 | $SIG{ALRM} = sub { $this->pm_abort("wait timeout") }; |
518709ed |
302 | alarm $this->die_timeout(); |
303 | } |
304 | |
305 | # send a TERM to each of the servers. |
50f238cd |
306 | if (my @pids = keys %{$this->{PIDS}}) { |
307 | $this->pm_notify("sending TERM to PIDs, @pids"); |
308 | kill "TERM", @pids; |
309 | } |
518709ed |
310 | |
311 | # wait for the servers to die. |
312 | while (%{$this->{PIDS}}) { |
c2bbadb3 |
313 | $this->pm_wait(); |
518709ed |
314 | } |
315 | |
316 | # die already. |
317 | $this->pm_exit("dying: ".$msg,$n); |
0baf5fac |
318 | } |
319 | |
c2bbadb3 |
320 | =head2 pm_wait |
321 | |
322 | instance or export |
323 | (int pid) pm_wait() |
324 | |
325 | DESCRIPTION: |
326 | |
327 | This calls wait() which suspends execution until a child has exited. |
328 | If the process ID returned by wait corresponds to a managed process, |
329 | pm_notify() is called with the exit status of that process. |
330 | pm_wait() returns with the return value of wait(). |
0baf5fac |
331 | |
332 | =cut |
333 | |
c2bbadb3 |
334 | sub pm_wait { |
4ceac1a1 |
335 | my ($this) = self_or_default(@_); |
518709ed |
336 | |
337 | # wait for the next server to die. |
5ef2d8bb |
338 | return if ((my $pid = wait()) < 0); |
518709ed |
339 | |
340 | # notify when one of our servers have died. |
341 | delete $this->{PIDS}->{$pid} and |
342 | $this->pm_notify("server (pid $pid) exited with status $?"); |
c2bbadb3 |
343 | |
344 | return $pid; |
0baf5fac |
345 | } |
346 | |
c146b63d |
347 | =head2 pm_write_pid_file |
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348 | |
c2bbadb3 |
349 | instance or export |
350 | () pm_write_pid_file([string filename]) |
351 | |
352 | DESCRIPTION: |
353 | |
354 | Writes current process ID to optionally specified file. If no filename is |
355 | specified, it uses the value of the C<pid_fname> parameter. |
356 | |
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357 | =cut |
358 | |
4ceac1a1 |
359 | sub pm_write_pid_file { |
360 | my ($this,$fname) = self_or_default(@_); |
0baf5fac |
361 | $fname ||= $this->pid_fname() or return; |
362 | if (!open PIDFILE, ">$fname") { |
518709ed |
363 | $this->pm_warn("open: $fname: $!"); |
0baf5fac |
364 | return; |
365 | } |
366 | print PIDFILE "$$\n"; |
367 | close PIDFILE; |
368 | } |
369 | |
c146b63d |
370 | =head2 pm_remove_pid_file |
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371 | |
c2bbadb3 |
372 | instance or export |
373 | () pm_remove_pid_file() |
374 | |
375 | DESCRIPTION: |
376 | |
377 | Removes optionally specified file. If no filename is specified, it uses |
378 | the value of the C<pid_fname> parameter. |
379 | |
0baf5fac |
380 | =cut |
381 | |
4ceac1a1 |
382 | sub pm_remove_pid_file { |
383 | my ($this,$fname) = self_or_default(@_); |
0baf5fac |
384 | $fname ||= $this->pid_fname() or return; |
518709ed |
385 | my $ret = unlink($fname) or $this->pm_warn("unlink: $fname: $!"); |
0baf5fac |
386 | return $ret; |
387 | } |
388 | |
50f238cd |
389 | =head2 sig_sub |
390 | |
391 | instance |
392 | () sig_sub(string name) |
393 | |
394 | DESCRIPTION: |
395 | |
396 | The name of this method is passed to POSIX::sigaction(), and handles signals |
397 | for the process manager. If $SIG_CODEREF is set, then the input arguments |
398 | to this are passed to a call to that. |
399 | |
400 | =cut |
401 | |
402 | sub sig_sub { |
403 | $SIG_CODEREF->(@_) if ref $SIG_CODEREF; |
404 | } |
405 | |
518709ed |
406 | =head2 sig_manager |
0baf5fac |
407 | |
c2bbadb3 |
408 | instance |
409 | () sig_manager(string name) |
410 | |
411 | DESCRIPTION: |
412 | |
413 | Handles signals of the process manager. Takes as input the name of signal |
414 | being handled. |
415 | |
0baf5fac |
416 | =cut |
417 | |
518709ed |
418 | sub sig_manager { |
419 | my ($this,$name) = @_; |
50f238cd |
420 | if ($name eq "TERM") { |
c2bbadb3 |
421 | $this->pm_notify("received signal $name"); |
422 | $this->pm_die("safe exit from signal $name"); |
50f238cd |
423 | } elsif ($name eq "HUP") { |
424 | # send a TERM to each of the servers, and pretend like nothing happened.. |
425 | if (my @pids = keys %{$this->{PIDS}}) { |
426 | $this->pm_notify("sending TERM to PIDs, @pids"); |
427 | kill "TERM", @pids; |
428 | } |
518709ed |
429 | } else { |
430 | $this->pm_notify("ignoring signal $name"); |
431 | } |
0baf5fac |
432 | } |
433 | |
518709ed |
434 | =head1 Handler methods |
0baf5fac |
435 | |
518709ed |
436 | =head2 handling_init |
0baf5fac |
437 | |
c2bbadb3 |
438 | instance or export |
439 | () handling_init() |
440 | |
441 | DESCRIPTION: |
442 | |
0baf5fac |
443 | =cut |
444 | |
518709ed |
445 | sub handling_init { |
c2bbadb3 |
446 | my ($this) = @_; |
0baf5fac |
447 | |
518709ed |
448 | # begin to handle signals. |
50f238cd |
449 | # We'll want accept(2) to return -1(EINTR) on caught signal.. |
450 | unless ($this->no_signals()) { |
451 | sigaction(SIGTERM, $this->{sigaction_no_sa_restart}) or $this->pm_warn("sigaction: SIGTERM: $!"); |
452 | sigaction(SIGHUP, $this->{sigaction_no_sa_restart}) or $this->pm_warn("sigaction: SIGHUP: $!"); |
453 | $SIG_CODEREF = sub { $this->sig_handler(@_) }; |
454 | } |
0baf5fac |
455 | |
518709ed |
456 | # change the name of this process as it appears in ps(1) output. |
457 | $this->pm_change_process_name("perl-fcgi"); |
0baf5fac |
458 | } |
459 | |
518709ed |
460 | =head2 pm_pre_dispatch |
0baf5fac |
461 | |
c2bbadb3 |
462 | instance or export |
463 | () pm_pre_dispatch() |
464 | |
465 | DESCRIPTION: |
466 | |
0baf5fac |
467 | =cut |
468 | |
518709ed |
469 | sub pm_pre_dispatch { |
4ceac1a1 |
470 | my ($this) = self_or_default(@_); |
50f238cd |
471 | |
472 | # Now, we want the request to continue unhindered.. |
473 | unless ($this->no_signals()) { |
474 | sigaction(SIGTERM, $this->{sigaction_sa_restart}) or $this->pm_warn("sigaction: SIGTERM: $!"); |
475 | sigaction(SIGHUP, $this->{sigaction_sa_restart}) or $this->pm_warn("sigaction: SIGHUP: $!"); |
476 | } |
0baf5fac |
477 | } |
478 | |
518709ed |
479 | =head2 pm_post_dispatch |
0baf5fac |
480 | |
c2bbadb3 |
481 | instance or export |
482 | () pm_post_dispatch() |
483 | |
484 | DESCRIPTION: |
485 | |
0baf5fac |
486 | =cut |
487 | |
518709ed |
488 | sub pm_post_dispatch { |
4ceac1a1 |
489 | my ($this) = self_or_default(@_); |
518709ed |
490 | if ($this->pm_received_signal("TERM")) { |
491 | $this->pm_exit("safe exit after SIGTERM"); |
492 | } |
493 | if ($this->pm_received_signal("HUP")) { |
494 | $this->pm_exit("safe exit after SIGHUP"); |
495 | } |
c2bbadb3 |
496 | if ($this->{MANAGER_PID} and getppid() != $this->{MANAGER_PID}) { |
518709ed |
497 | $this->pm_exit("safe exit: manager has died"); |
498 | } |
50f238cd |
499 | # We'll want accept(2) to return -1(EINTR) on caught signal.. |
500 | unless ($this->no_signals()) { |
501 | sigaction(SIGTERM, $this->{sigaction_no_sa_restart}) or $this->pm_warn("sigaction: SIGTERM: $!"); |
502 | sigaction(SIGHUP, $this->{sigaction_no_sa_restart}) or $this->pm_warn("sigaction: SIGHUP: $!"); |
503 | } |
0baf5fac |
504 | } |
505 | |
518709ed |
506 | =head2 sig_handler |
0baf5fac |
507 | |
c2bbadb3 |
508 | instance or export |
509 | () sig_handler() |
510 | |
511 | DESCRIPTION: |
512 | |
0baf5fac |
513 | =cut |
514 | |
518709ed |
515 | sub sig_handler { |
c146b63d |
516 | my ($this,$name) = @_; |
518709ed |
517 | $this->pm_received_signal($name,1); |
518 | } |
519 | |
520 | =head1 Common methods and routines |
521 | |
522 | =head2 self_or_default |
523 | |
524 | private global |
525 | (ProcManager, @args) self_or_default([ ProcManager, ] @args); |
526 | |
527 | DESCRIPTION: |
528 | |
529 | This is a helper subroutine to acquire or otherwise create a singleton |
530 | default object if one is not passed in, e.g., a method call. |
531 | |
532 | =cut |
533 | |
534 | sub self_or_default { |
535 | return @_ if defined $_[0] and !ref $_[0] and $_[0] eq 'FCGI::ProcManager'; |
536 | if (!defined $_[0] or (ref($_[0]) ne 'FCGI::ProcManager' and |
4b99386a |
537 | !UNIVERSAL::isa($_[0],'FCGI::ProcManager'))) { |
518709ed |
538 | $Q or $Q = $FCGI::ProcManager::Default->new; |
539 | unshift @_, $Q; |
0baf5fac |
540 | } |
518709ed |
541 | return wantarray ? @_ : $Q; |
542 | } |
543 | |
544 | =head2 pm_change_process_name |
545 | |
c2bbadb3 |
546 | instance or export |
547 | () pm_change_process_name() |
548 | |
549 | DESCRIPTION: |
550 | |
518709ed |
551 | =cut |
552 | |
553 | sub pm_change_process_name { |
554 | my ($this,$name) = self_or_default(@_); |
555 | $0 = $name; |
556 | } |
557 | |
558 | =head2 pm_received_signal |
559 | |
c2bbadb3 |
560 | instance or export |
561 | () pm_received signal() |
562 | |
563 | DESCRIPTION: |
564 | |
518709ed |
565 | =cut |
566 | |
567 | sub pm_received_signal { |
568 | my ($this,$sig,$received) = self_or_default(@_); |
569 | $sig or return $this->{SIG_RECEIVED}; |
570 | $received and $this->{SIG_RECEIVED}->{$sig}++; |
571 | return $this->{SIG_RECEIVED}->{$sig}; |
572 | } |
573 | |
c2bbadb3 |
574 | =head1 parameters |
575 | |
518709ed |
576 | =head2 pm_parameter |
577 | |
c2bbadb3 |
578 | instance or export |
579 | () pm_parameter() |
580 | |
581 | DESCRIPTION: |
582 | |
518709ed |
583 | =cut |
584 | |
585 | sub pm_parameter { |
586 | my ($this,$key,$value) = self_or_default(@_); |
587 | defined $value and $this->{$key} = $value; |
588 | return $this->{$key}; |
0baf5fac |
589 | } |
590 | |
518709ed |
591 | =head2 n_processes |
592 | |
593 | =head2 no_signals |
594 | |
595 | =head2 pid_fname |
596 | |
597 | =head2 die_timeout |
598 | |
599 | =head2 role |
600 | |
601 | =head2 start_delay |
602 | |
c2bbadb3 |
603 | DESCRIPTION: |
604 | |
518709ed |
605 | =cut |
606 | |
607 | sub n_processes { shift->pm_parameter("n_processes", @_); } |
608 | sub pid_fname { shift->pm_parameter("pid_fname", @_); } |
609 | sub no_signals { shift->pm_parameter("no_signals", @_); } |
610 | sub die_timeout { shift->pm_parameter("die_timeout", @_); } |
611 | sub role { shift->pm_parameter("role", @_); } |
612 | sub start_delay { shift->pm_parameter("start_delay", @_); } |
613 | |
c2bbadb3 |
614 | =head1 notification and death |
615 | |
c146b63d |
616 | =head2 pm_warn |
0baf5fac |
617 | |
c2bbadb3 |
618 | instance or export |
619 | () pm_warn() |
620 | |
621 | DESCRIPTION: |
622 | |
0baf5fac |
623 | =cut |
624 | |
4ceac1a1 |
625 | sub pm_warn { |
626 | my ($this,$msg) = self_or_default(@_); |
518709ed |
627 | $this->pm_notify($msg); |
628 | } |
629 | |
630 | =head2 pm_notify |
631 | |
c2bbadb3 |
632 | instance or export |
633 | () pm_notify() |
634 | |
635 | DESCRIPTION: |
636 | |
518709ed |
637 | =cut |
638 | |
639 | sub pm_notify { |
640 | my ($this,$msg) = self_or_default(@_); |
641 | $msg =~ s/\s*$/\n/; |
642 | print STDERR "FastCGI: ".$this->role()." (pid $$): ".$msg; |
0baf5fac |
643 | } |
644 | |
c2bbadb3 |
645 | =head2 pm_exit |
646 | |
647 | instance or export |
648 | () pm_exit(string msg[, int exit_status]) |
649 | |
650 | DESCRIPTION: |
0baf5fac |
651 | |
652 | =cut |
653 | |
4ceac1a1 |
654 | sub pm_exit { |
655 | my ($this,$msg,$n) = self_or_default(@_); |
0baf5fac |
656 | $n ||= 0; |
c2bbadb3 |
657 | |
658 | # if we still have children at this point, something went wrong. |
659 | # SIGKILL them now. |
660 | kill "KILL", keys %{$this->{PIDS}} if $this->{PIDS}; |
661 | |
4ceac1a1 |
662 | $this->pm_warn($msg); |
0baf5fac |
663 | $@ = $msg; |
664 | exit $n; |
665 | } |
666 | |
c146b63d |
667 | =head2 pm_abort |
0baf5fac |
668 | |
c2bbadb3 |
669 | instance or export |
670 | () pm_abort(string msg[, int exit_status]) |
671 | |
672 | DESCRIPTION: |
673 | |
0baf5fac |
674 | =cut |
675 | |
4ceac1a1 |
676 | sub pm_abort { |
677 | my ($this,$msg,$n) = self_or_default(@_); |
0baf5fac |
678 | $n ||= 1; |
4ceac1a1 |
679 | $this->pm_exit($msg,1); |
0baf5fac |
680 | } |
681 | |
682 | 1; |
683 | __END__ |
684 | |
685 | =head1 BUGS |
686 | |
687 | No known bugs, but this does not mean no bugs exist. |
688 | |
689 | =head1 SEE ALSO |
690 | |
691 | L<FCGI>. |
692 | |
9d643399 |
693 | =head1 MAINTAINER |
694 | |
695 | Gareth Kirwan <gbjk@thermeon.com> |
696 | |
697 | =head1 AUTHOR |
698 | |
699 | James E Jurach Jr. |
700 | |
0baf5fac |
701 | =head1 COPYRIGHT |
702 | |
703 | FCGI-ProcManager - A Perl FCGI Process Manager |
704 | Copyright (c) 2000, FundsXpress Financial Network, Inc. |
705 | |
706 | This library is free software; you can redistribute it and/or |
707 | modify it under the terms of the GNU Lesser General Public |
708 | License as published by the Free Software Foundation; either |
709 | version 2 of the License, or (at your option) any later version. |
710 | |
711 | BECAUSE THIS LIBRARY IS LICENSED FREE OF CHARGE, THIS LIBRARY IS |
712 | BEING PROVIDED "AS IS WITH ALL FAULTS," WITHOUT ANY WARRANTIES |
713 | OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, WITHOUT |
714 | LIMITATION, ANY IMPLIED WARRANTIES OF TITLE, NONINFRINGEMENT, |
715 | MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, AND THE |
716 | ENTIRE RISK AS TO SATISFACTORY QUALITY, PERFORMANCE, ACCURACY, |
717 | AND EFFORT IS WITH THE YOU. See the GNU Lesser General Public |
718 | License for more details. |
719 | |
720 | You should have received a copy of the GNU Lesser General Public |
721 | License along with this library; if not, write to the Free Software |
722 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
723 | |
724 | =cut |