[ViewVC] Diff of: cvs/AnyEvent-MP/MP.pm

Comparing AnyEvent-MP/MP.pm (file contents):
Revision 1.71 by root, Sun Aug 30 19:52:56 2009 UTC vs.
Revision 1.84 by root, Tue Sep 8 01:42:14 2009 UTC

…		…
4		4
5	=head1 SYNOPSIS	5	=head1 SYNOPSIS
6		6
7	use AnyEvent::MP;	7	use AnyEvent::MP;
8		8
9	$NODE # contains this node's noderef	9	$NODE # contains this node's node ID
10	NODE # returns this node's noderef	10	NODE # returns this node's node ID
11	NODE $port # returns the noderef of the port
12		11
13	$SELF # receiving/own port id in rcv callbacks	12	$SELF # receiving/own port id in rcv callbacks
14		13
15	# initialise the node so it can send/receive messages	14	# initialise the node so it can send/receive messages
16	initialise_node;	15	configure;
17		16
18	# ports are message endpoints	17	# ports are message destinations
19		18
20	# sending messages	19	# sending messages
21	snd $port, type => data...;	20	snd $port, type => data...;
22	snd $port, @msg;	21	snd $port, @msg;
23	snd @msg_with_first_element_being_a_port;	22	snd @msg_with_first_element_being_a_port;
24		23
25	# creating/using ports, the simple way	24	# creating/using ports, the simple way
26	my $simple_port = port { my @msg = @_; 0 };	25	my $simple_port = port { my @msg = @_ };
27		26
28	# creating/using ports, tagged message matching	27	# creating/using ports, tagged message matching
29	my $port = port;	28	my $port = port;
30	rcv $port, ping => sub { snd $_[0], "pong"; 0 };	29	rcv $port, ping => sub { snd $_[0], "pong" };
31	rcv $port, pong => sub { warn "pong received\n"; 0 };	30	rcv $port, pong => sub { warn "pong received\n" };
32		31
33	# create a port on another node	32	# create a port on another node
34	my $port = spawn $node, $initfunc, @initdata;	33	my $port = spawn $node, $initfunc, @initdata;
35		34
36	# monitoring	35	# monitoring
…		…
40		39
41	=head1 CURRENT STATUS	40	=head1 CURRENT STATUS
42		41
43	bin/aemp - stable.	42	bin/aemp - stable.
44	AnyEvent::MP - stable API, should work.	43	AnyEvent::MP - stable API, should work.
45	AnyEvent::MP::Intro - uptodate, but incomplete.	44	AnyEvent::MP::Intro - explains most concepts.
46	AnyEvent::MP::Kernel - mostly stable.	45	AnyEvent::MP::Kernel - mostly stable.
47	AnyEvent::MP::Global - stable API, protocol not yet final.	46	AnyEvent::MP::Global - stable but incomplete, protocol not yet final.
48		47
49	stay tuned.	48	stay tuned.
50		49
51	=head1 DESCRIPTION	50	=head1 DESCRIPTION
52		51
53	This module (-family) implements a simple message passing framework.	52	This module (-family) implements a simple message passing framework.
54		53
…		…
56	on the same or other hosts, and you can supervise entities remotely.	55	on the same or other hosts, and you can supervise entities remotely.
57		56
58	For an introduction to this module family, see the L<AnyEvent::MP::Intro>	57	For an introduction to this module family, see the L<AnyEvent::MP::Intro>
59	manual page and the examples under F<eg/>.	58	manual page and the examples under F<eg/>.
60		59
61	At the moment, this module family is a bit underdocumented.
62
63	=head1 CONCEPTS	60	=head1 CONCEPTS
64		61
65	=over 4	62	=over 4
66		63
67	=item port	64	=item port
68		65
69	A port is something you can send messages to (with the C<snd> function).	66	Not to be confused with a TCP port, a "port" is something you can send
		67	messages to (with the C<snd> function).
70		68
71	Ports allow you to register C<rcv> handlers that can match all or just	69	Ports allow you to register C<rcv> handlers that can match all or just
72	some messages. Messages send to ports will not be queued, regardless of	70	some messages. Messages send to ports will not be queued, regardless of
73	anything was listening for them or not.	71	anything was listening for them or not.
74		72
…		…
85		83
86	Nodes are either public (have one or more listening ports) or private	84	Nodes are either public (have one or more listening ports) or private
87	(no listening ports). Private nodes cannot talk to other private nodes	85	(no listening ports). Private nodes cannot talk to other private nodes
88	currently.	86	currently.
89		87
90	=item node ID - C<[a-za-Z0-9_\-.:]+>	88	=item node ID - C<[A-Z_][a-zA-Z0-9_\-.:]*>
91		89
92	A node ID is a string that uniquely identifies the node within a	90	A node ID is a string that uniquely identifies the node within a
93	network. Depending on the configuration used, node IDs can look like a	91	network. Depending on the configuration used, node IDs can look like a
94	hostname, a hostname and a port, or a random string. AnyEvent::MP itself	92	hostname, a hostname and a port, or a random string. AnyEvent::MP itself
95	doesn't interpret node IDs in any way.	93	doesn't interpret node IDs in any way.
…		…
99	Nodes can only talk to each other by creating some kind of connection to	97	Nodes can only talk to each other by creating some kind of connection to
100	each other. To do this, nodes should listen on one or more local transport	98	each other. To do this, nodes should listen on one or more local transport
101	endpoints - binds. Currently, only standard C<ip:port> specifications can	99	endpoints - binds. Currently, only standard C<ip:port> specifications can
102	be used, which specify TCP ports to listen on.	100	be used, which specify TCP ports to listen on.
103		101
104	=item seeds - C<host:port>	102	=item seed nodes
105		103
106	When a node starts, it knows nothing about the network. To teach the node	104	When a node starts, it knows nothing about the network. To teach the node
107	about the network it first has to contact some other node within the	105	about the network it first has to contact some other node within the
108	network. This node is called a seed.	106	network. This node is called a seed.
109		107
110	Seeds are transport endpoint(s) of as many nodes as one wants. Those nodes	108	Apart from the fact that other nodes know them as seed nodes and they have
		109	to have fixed listening addresses, seed nodes are perfectly normal nodes -
		110	any node can function as a seed node for others.
		111
		112	In addition to discovering the network, seed nodes are also used to
		113	maintain the network and to connect nodes that otherwise would have
		114	trouble connecting. They form the backbone of the AnyEvent::MP network.
		115
111	are expected to be long-running, and at least one of those should always	116	Seed nodes are expected to be long-running, and at least one seed node
112	be available. When nodes run out of connections (e.g. due to a network	117	should always be available.
113	error), they try to re-establish connections to some seednodes again to
114	join the network.
115		118
116	Apart from being sued for seeding, seednodes are not special in any way -	119	=item seeds - C<host:port>
117	every public node can be a seednode.	120
		121	Seeds are transport endpoint(s) (usually a hostname/IP address and a
		122	TCP port) of nodes thta should be used as seed nodes.
		123
		124	The nodes listening on those endpoints are expected to be long-running,
		125	and at least one of those should always be available. When nodes run out
		126	of connections (e.g. due to a network error), they try to re-establish
		127	connections to some seednodes again to join the network.
118		128
119	=back	129	=back
120		130
121	=head1 VARIABLES/FUNCTIONS	131	=head1 VARIABLES/FUNCTIONS
122		132
…		…
138		148
139	our $VERSION = $AnyEvent::MP::Kernel::VERSION;	149	our $VERSION = $AnyEvent::MP::Kernel::VERSION;
140		150
141	our @EXPORT = qw(	151	our @EXPORT = qw(
142	NODE $NODE *SELF node_of after	152	NODE $NODE *SELF node_of after
143	initialise_node	153	configure
144	snd rcv mon mon_guard kil reg psub spawn	154	snd rcv mon mon_guard kil reg psub spawn
145	port	155	port
146	);	156	);
147		157
148	our $SELF;	158	our $SELF;
…		…
155		165
156	=item $thisnode = NODE / $NODE	166	=item $thisnode = NODE / $NODE
157		167
158	The C<NODE> function returns, and the C<$NODE> variable contains, the node	168	The C<NODE> function returns, and the C<$NODE> variable contains, the node
159	ID of the node running in the current process. This value is initialised by	169	ID of the node running in the current process. This value is initialised by
160	a call to C<initialise_node>.	170	a call to C<configure>.
161		171
162	=item $nodeid = node_of $port	172	=item $nodeid = node_of $port
163		173
164	Extracts and returns the node ID from a port ID or a node ID.	174	Extracts and returns the node ID from a port ID or a node ID.
165		175
166	=item initialise_node $profile_name, key => value...	176	=item configure $profile, key => value...
		177
		178	=item configure key => value...
167		179
168	Before a node can talk to other nodes on the network (i.e. enter	180	Before a node can talk to other nodes on the network (i.e. enter
169	"distributed mode") it has to initialise itself - the minimum a node needs	181	"distributed mode") it has to configure itself - the minimum a node needs
170	to know is its own name, and optionally it should know the addresses of	182	to know is its own name, and optionally it should know the addresses of
171	some other nodes in the network to discover other nodes.	183	some other nodes in the network to discover other nodes.
172		184
173	This function initialises a node - it must be called exactly once (or	185	This function configures a node - it must be called exactly once (or
174	never) before calling other AnyEvent::MP functions.	186	never) before calling other AnyEvent::MP functions.
175		187
176	The first argument is a profile name. If it is C<undef> or missing, then	188	=over 4
177	the current nodename will be used instead (i.e. F<uname -n>).
178		189
		190	=item step 1, gathering configuration from profiles
		191
179	The function first looks up the profile in the aemp configuration (see the	192	The function first looks up a profile in the aemp configuration (see the
180	L<aemp> commandline utility). the profile is calculated as follows:	193	L<aemp> commandline utility). The profile name can be specified via the
		194	named C<profile> parameter or can simply be the first parameter). If it is
		195	missing, then the nodename (F<uname -n>) will be used as profile name.
181		196
		197	The profile data is then gathered as follows:
		198
182	First, all remaining key => value pairs (all of which are conviniently	199	First, all remaining key => value pairs (all of which are conveniently
183	undocumented at the moment) will be used. Then they will be overwritten by	200	undocumented at the moment) will be interpreted as configuration
184	any values specified in the global default configuration (see the F<aemp>	201	data. Then they will be overwritten by any values specified in the global
185	utility), then the chain of profiles selected, if any. That means that	202	default configuration (see the F<aemp> utility), then the chain of
		203	profiles chosen by the profile name (and any C<parent> attributes).
		204
186	the values specified in the profile have highest priority and the values	205	That means that the values specified in the profile have highest priority
187	specified via C<initialise_node> have lowest priority.	206	and the values specified directly via C<configure> have lowest priority,
		207	and can only be used to specify defaults.
188		208
189	If the profile specifies a node ID, then this will become the node ID of	209	If the profile specifies a node ID, then this will become the node ID of
190	this process. If not, then the profile name will be used as node ID. The	210	this process. If not, then the profile name will be used as node ID. The
191	special node ID of C<anon/> will be replaced by a random node ID.	211	special node ID of C<anon/> will be replaced by a random node ID.
		212
		213	=item step 2, bind listener sockets
192		214
193	The next step is to look up the binds in the profile, followed by binding	215	The next step is to look up the binds in the profile, followed by binding
194	aemp protocol listeners on all binds specified (it is possible and valid	216	aemp protocol listeners on all binds specified (it is possible and valid
195	to have no binds, meaning that the node cannot be contacted form the	217	to have no binds, meaning that the node cannot be contacted form the
196	outside. This means the node cannot talk to other nodes that also have no	218	outside. This means the node cannot talk to other nodes that also have no
197	binds, but it can still talk to all "normal" nodes).	219	binds, but it can still talk to all "normal" nodes).
198		220
199	If the profile does not specify a binds list, then a default of C<*> is	221	If the profile does not specify a binds list, then a default of C<*> is
200	used.	222	used, meaning the node will bind on a dynamically-assigned port on every
		223	local IP address it finds.
201		224
		225	=item step 3, connect to seed nodes
		226
202	Lastly, the seeds list from the profile is passed to the	227	As the last step, the seeds list from the profile is passed to the
203	L<AnyEvent::MP::Global> module, which will then use it to keep	228	L<AnyEvent::MP::Global> module, which will then use it to keep
204	connectivity with at least on of those seed nodes at any point in time.	229	connectivity with at least one node at any point in time.
205		230
206	Example: become a distributed node listening on the guessed noderef, or	231	=back
207	the one specified via C<aemp> for the current node. This should be the	232
		233	Example: become a distributed node using the locla node name as profile.
208	most common form of invocation for "daemon"-type nodes.	234	This should be the most common form of invocation for "daemon"-type nodes.
209		235
210	initialise_node;	236	configure
211		237
212	Example: become an anonymous node. This form is often used for commandline	238	Example: become an anonymous node. This form is often used for commandline
213	clients.	239	clients.
214		240
215	initialise_node "anon/";	241	configure nodeid => "anon/";
216		242
217	Example: become a distributed node. If there is no profile of the given	243	Example: configure a node using a profile called seed, which si suitable
218	name, or no binds list was specified, resolve C<localhost:4044> and bind	244	for a seed node as it binds on all local addresses on a fixed port (4040,
219	on the resulting addresses.	245	customary for aemp).
220		246
221	initialise_node "localhost:4044";	247	# use the aemp commandline utility
		248	# aemp profile seed nodeid anon/ binds '*:4040'
		249
		250	# then use it
		251	configure profile => "seed";
		252
		253	# or simply use aemp from the shell again:
		254	# aemp run profile seed
		255
		256	# or provide a nicer-to-remember nodeid
		257	# aemp run profile seed nodeid "$(hostname)"
222		258
223	=item $SELF	259	=item $SELF
224		260
225	Contains the current port id while executing C<rcv> callbacks or C<psub>	261	Contains the current port id while executing C<rcv> callbacks or C<psub>
226	blocks.	262	blocks.
…		…
348		384
349	=cut	385	=cut
350		386
351	sub rcv($@) {	387	sub rcv($@) {
352	my $port = shift;	388	my $port = shift;
353	my ($noderef, $portid) = split /#/, $port, 2;	389	my ($nodeid, $portid) = split /#/, $port, 2;
354		390
355	$NODE{$noderef} == $NODE{""}	391	$NODE{$nodeid} == $NODE{""}
356	or Carp::croak "$port: rcv can only be called on local ports, caught";	392	or Carp::croak "$port: rcv can only be called on local ports, caught";
357		393
358	while (@_) {	394	while (@_) {
359	if (ref $_[0]) {	395	if (ref $_[0]) {
360	if (my $self = $PORT_DATA{$portid}) {	396	if (my $self = $PORT_DATA{$portid}) {
…		…
451		487
452	Monitor the given port and do something when the port is killed or	488	Monitor the given port and do something when the port is killed or
453	messages to it were lost, and optionally return a guard that can be used	489	messages to it were lost, and optionally return a guard that can be used
454	to stop monitoring again.	490	to stop monitoring again.
455		491
		492	In the first form (callback), the callback is simply called with any
		493	number of C<@reason> elements (no @reason means that the port was deleted
		494	"normally"). Note also that I<< the callback B<must> never die >>, so use
		495	C<eval> if unsure.
		496
		497	In the second form (another port given), the other port (C<$rcvport>)
		498	will be C<kil>'ed with C<@reason>, if a @reason was specified, i.e. on
		499	"normal" kils nothing happens, while under all other conditions, the other
		500	port is killed with the same reason.
		501
		502	The third form (kill self) is the same as the second form, except that
		503	C<$rvport> defaults to C<$SELF>.
		504
		505	In the last form (message), a message of the form C<@msg, @reason> will be
		506	C<snd>.
		507
		508	Monitoring-actions are one-shot: once messages are lost (and a monitoring
		509	alert was raised), they are removed and will not trigger again.
		510
		511	As a rule of thumb, monitoring requests should always monitor a port from
		512	a local port (or callback). The reason is that kill messages might get
		513	lost, just like any other message. Another less obvious reason is that
		514	even monitoring requests can get lost (for example, when the connection
		515	to the other node goes down permanently). When monitoring a port locally
		516	these problems do not exist.
		517
456	C<mon> effectively guarantees that, in the absence of hardware failures,	518	C<mon> effectively guarantees that, in the absence of hardware failures,
457	after starting the monitor, either all messages sent to the port will	519	after starting the monitor, either all messages sent to the port will
458	arrive, or the monitoring action will be invoked after possible message	520	arrive, or the monitoring action will be invoked after possible message
459	loss has been detected. No messages will be lost "in between" (after	521	loss has been detected. No messages will be lost "in between" (after
460	the first lost message no further messages will be received by the	522	the first lost message no further messages will be received by the
461	port). After the monitoring action was invoked, further messages might get	523	port). After the monitoring action was invoked, further messages might get
462	delivered again.	524	delivered again.
463		525
464	Note that monitoring-actions are one-shot: once messages are lost (and a	526	Inter-host-connection timeouts and monitoring depend on the transport
465	monitoring alert was raised), they are removed and will not trigger again.	527	used. The only transport currently implemented is TCP, and AnyEvent::MP
		528	relies on TCP to detect node-downs (this can take 10-15 minutes on a
		529	non-idle connection, and usually around two hours for idle conenctions).
466		530
467	In the first form (callback), the callback is simply called with any	531	This means that monitoring is good for program errors and cleaning up
468	number of C<@reason> elements (no @reason means that the port was deleted	532	stuff eventually, but they are no replacement for a timeout when you need
469	"normally"). Note also that I<< the callback B<must> never die >>, so use	533	to ensure some maximum latency.
470	C<eval> if unsure.
471
472	In the second form (another port given), the other port (C<$rcvport>)
473	will be C<kil>'ed with C<@reason>, iff a @reason was specified, i.e. on
474	"normal" kils nothing happens, while under all other conditions, the other
475	port is killed with the same reason.
476
477	The third form (kill self) is the same as the second form, except that
478	C<$rvport> defaults to C<$SELF>.
479
480	In the last form (message), a message of the form C<@msg, @reason> will be
481	C<snd>.
482
483	As a rule of thumb, monitoring requests should always monitor a port from
484	a local port (or callback). The reason is that kill messages might get
485	lost, just like any other message. Another less obvious reason is that
486	even monitoring requests can get lost (for exmaple, when the connection
487	to the other node goes down permanently). When monitoring a port locally
488	these problems do not exist.
489		534
490	Example: call a given callback when C<$port> is killed.	535	Example: call a given callback when C<$port> is killed.
491		536
492	mon $port, sub { warn "port died because of <@_>\n" };	537	mon $port, sub { warn "port died because of <@_>\n" };
493		538
…		…
500	mon $port, $self => "restart";	545	mon $port, $self => "restart";
501		546
502	=cut	547	=cut
503		548
504	sub mon {	549	sub mon {
505	my ($noderef, $port) = split /#/, shift, 2;	550	my ($nodeid, $port) = split /#/, shift, 2;
506		551
507	my $node = $NODE{$noderef} \|\| add_node $noderef;	552	my $node = $NODE{$nodeid} \|\| add_node $nodeid;
508		553
509	my $cb = @_ ? shift : $SELF \|\| Carp::croak 'mon: called with one argument only, but $SELF not set,';	554	my $cb = @_ ? shift : $SELF \|\| Carp::croak 'mon: called with one argument only, but $SELF not set,';
510		555
511	unless (ref $cb) {	556	unless (ref $cb) {
512	if (@_) {	557	if (@_) {
…		…
588	the package, then the package above the package and so on (e.g.	633	the package, then the package above the package and so on (e.g.
589	C<MyApp::Chat::Server>, C<MyApp::Chat>, C<MyApp>) until the function	634	C<MyApp::Chat::Server>, C<MyApp::Chat>, C<MyApp>) until the function
590	exists or it runs out of package names.	635	exists or it runs out of package names.
591		636
592	The init function is then called with the newly-created port as context	637	The init function is then called with the newly-created port as context
593	object (C<$SELF>) and the C<@initdata> values as arguments.	638	object (C<$SELF>) and the C<@initdata> values as arguments. It I<must>
		639	call one of the C<rcv> functions to set callbacks on C<$SELF>, otherwise
		640	the port might not get created.
594		641
595	A common idiom is to pass a local port, immediately monitor the spawned	642	A common idiom is to pass a local port, immediately monitor the spawned
596	port, and in the remote init function, immediately monitor the passed	643	port, and in the remote init function, immediately monitor the passed
597	local port. This two-way monitoring ensures that both ports get cleaned up	644	local port. This two-way monitoring ensures that both ports get cleaned up
598	when there is a problem.	645	when there is a problem.
599		646
		647	C<spawn> guarantees that the C<$initfunc> has no visible effects on the
		648	caller before C<spawn> returns (by delaying invocation when spawn is
		649	called for the local node).
		650
600	Example: spawn a chat server port on C<$othernode>.	651	Example: spawn a chat server port on C<$othernode>.
601		652
602	# this node, executed from within a port context:	653	# this node, executed from within a port context:
603	my $server = spawn $othernode, "MyApp::Chat::Server::connect", $SELF;	654	my $server = spawn $othernode, "MyApp::Chat::Server::connect", $SELF;
604	mon $server;	655	mon $server;
…		…
618		669
619	sub _spawn {	670	sub _spawn {
620	my $port = shift;	671	my $port = shift;
621	my $init = shift;	672	my $init = shift;
622		673
		674	# rcv will create the actual port
623	local $SELF = "$NODE#$port";	675	local $SELF = "$NODE#$port";
624	eval {	676	eval {
625	&{ load_func $init }	677	&{ load_func $init }
626	};	678	};
627	_self_die if $@;	679	_self_die if $@;
628	}	680	}
629		681
630	sub spawn(@) {	682	sub spawn(@) {
631	my ($noderef, undef) = split /#/, shift, 2;	683	my ($nodeid, undef) = split /#/, shift, 2;
632		684
633	my $id = "$RUNIQ." . $ID++;	685	my $id = "$RUNIQ." . $ID++;
634		686
635	$_[0] =~ /::/	687	$_[0] =~ /::/
636	or Carp::croak "spawn init function must be a fully-qualified name, caught";	688	or Carp::croak "spawn init function must be a fully-qualified name, caught";
637		689
638	snd_to_func $noderef, "AnyEvent::MP::_spawn" => $id, @_;	690	snd_to_func $nodeid, "AnyEvent::MP::_spawn" => $id, @_;
639		691
640	"$noderef#$id"	692	"$nodeid#$id"
641	}	693	}
642		694
643	=item after $timeout, @msg	695	=item after $timeout, @msg
644		696
645	=item after $timeout, $callback	697	=item after $timeout, $callback
…		…
684		736
685	=item * Node IDs are arbitrary strings in AEMP.	737	=item * Node IDs are arbitrary strings in AEMP.
686		738
687	Erlang relies on special naming and DNS to work everywhere in the same	739	Erlang relies on special naming and DNS to work everywhere in the same
688	way. AEMP relies on each node somehow knowing its own address(es) (e.g. by	740	way. AEMP relies on each node somehow knowing its own address(es) (e.g. by
689	configuraiton or DNS), but will otherwise discover other odes itself.	741	configuration or DNS), but will otherwise discover other odes itself.
690		742
691	=item * Erlang has a "remote ports are like local ports" philosophy, AEMP	743	=item * Erlang has a "remote ports are like local ports" philosophy, AEMP
692	uses "local ports are like remote ports".	744	uses "local ports are like remote ports".
693		745
694	The failure modes for local ports are quite different (runtime errors	746	The failure modes for local ports are quite different (runtime errors
…		…
707		759
708	Erlang uses processes that selectively receive messages, and therefore	760	Erlang uses processes that selectively receive messages, and therefore
709	needs a queue. AEMP is event based, queuing messages would serve no	761	needs a queue. AEMP is event based, queuing messages would serve no
710	useful purpose. For the same reason the pattern-matching abilities of	762	useful purpose. For the same reason the pattern-matching abilities of
711	AnyEvent::MP are more limited, as there is little need to be able to	763	AnyEvent::MP are more limited, as there is little need to be able to
712	filter messages without dequeing them.	764	filter messages without dequeuing them.
713		765
714	(But see L<Coro::MP> for a more Erlang-like process model on top of AEMP).	766	(But see L<Coro::MP> for a more Erlang-like process model on top of AEMP).
715		767
716	=item * Erlang sends are synchronous, AEMP sends are asynchronous.	768	=item * Erlang sends are synchronous, AEMP sends are asynchronous.
717		769
…		…
823	L<AnyEvent::MP::Kernel> - more, lower-level, stuff.	875	L<AnyEvent::MP::Kernel> - more, lower-level, stuff.
824		876
825	L<AnyEvent::MP::Global> - network maintainance and port groups, to find	877	L<AnyEvent::MP::Global> - network maintainance and port groups, to find
826	your applications.	878	your applications.
827		879
		880	L<AnyEvent::MP::LogCatcher> - simple service to display log messages from
		881	all nodes.
		882
828	L<AnyEvent>.	883	L<AnyEvent>.
829		884
830	=head1 AUTHOR	885	=head1 AUTHOR
831		886
832	Marc Lehmann <schmorp@schmorp.de>	887	Marc Lehmann <schmorp@schmorp.de>

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Comparing AnyEvent-MP/MP.pm (file contents): Revision 1.71 by root, Sun Aug 30 19:52:56 2009 UTC vs. Revision 1.84 by root, Tue Sep 8 01:42:14 2009 UTC

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Comparing AnyEvent-MP/MP.pm (file contents):
Revision 1.71 by root, Sun Aug 30 19:52:56 2009 UTC vs.
Revision 1.84 by root, Tue Sep 8 01:42:14 2009 UTC