| … | |
… | |
| 197 | At least one additional noderef is required (either by specifying it |
197 | At least one additional noderef is required (either by specifying it |
| 198 | directly or because it is part of the configuration profile): The node |
198 | directly or because it is part of the configuration profile): The node |
| 199 | will try to connect to all of them and will become a slave attached to the |
199 | will try to connect to all of them and will become a slave attached to the |
| 200 | first node it can successfully connect to. |
200 | first node it can successfully connect to. |
| 201 | |
201 | |
|
|
202 | Note that slave nodes cannot change their name, and consequently, their |
|
|
203 | master, so if the master goes down, the slave node will not function well |
|
|
204 | anymore until it can re-establish conenciton to its master. This makes |
|
|
205 | slave nodes unsuitable for long-term nodes or fault-tolerant networks. |
|
|
206 | |
| 202 | =back |
207 | =back |
| 203 | |
208 | |
| 204 | This function will block until all nodes have been resolved and, for slave |
209 | This function will block until all nodes have been resolved and, for slave |
| 205 | nodes, until it has successfully established a connection to a master |
210 | nodes, until it has successfully established a connection to a master |
| 206 | server. |
211 | server. |
|
|
212 | |
|
|
213 | All the seednodes will also be specially marked to automatically retry |
|
|
214 | connecting to them infinitely. |
| 207 | |
215 | |
| 208 | Example: become a public node listening on the guessed noderef, or the one |
216 | Example: become a public node listening on the guessed noderef, or the one |
| 209 | specified via C<aemp> for the current node. This should be the most common |
217 | specified via C<aemp> for the current node. This should be the most common |
| 210 | form of invocation for "daemon"-type nodes. |
218 | form of invocation for "daemon"-type nodes. |
| 211 | |
219 | |
| … | |
… | |
| 666 | my $id = "$RUNIQ." . $ID++; |
674 | my $id = "$RUNIQ." . $ID++; |
| 667 | |
675 | |
| 668 | $_[0] =~ /::/ |
676 | $_[0] =~ /::/ |
| 669 | or Carp::croak "spawn init function must be a fully-qualified name, caught"; |
677 | or Carp::croak "spawn init function must be a fully-qualified name, caught"; |
| 670 | |
678 | |
| 671 | ($NODE{$noderef} || add_node $noderef) |
679 | snd_to_func $noderef, "AnyEvent::MP::_spawn" => $id, @_; |
| 672 | ->send (["", "AnyEvent::MP::_spawn" => $id, @_]); |
|
|
| 673 | |
680 | |
| 674 | "$noderef#$id" |
681 | "$noderef#$id" |
| 675 | } |
682 | } |
| 676 | |
|
|
| 677 | =back |
|
|
| 678 | |
|
|
| 679 | =head1 NODE MESSAGES |
|
|
| 680 | |
|
|
| 681 | Nodes understand the following messages sent to them. Many of them take |
|
|
| 682 | arguments called C<@reply>, which will simply be used to compose a reply |
|
|
| 683 | message - C<$reply[0]> is the port to reply to, C<$reply[1]> the type and |
|
|
| 684 | the remaining arguments are simply the message data. |
|
|
| 685 | |
|
|
| 686 | While other messages exist, they are not public and subject to change. |
|
|
| 687 | |
|
|
| 688 | =over 4 |
|
|
| 689 | |
|
|
| 690 | =cut |
|
|
| 691 | |
|
|
| 692 | =item lookup => $name, @reply |
|
|
| 693 | |
|
|
| 694 | Replies with the port ID of the specified well-known port, or C<undef>. |
|
|
| 695 | |
|
|
| 696 | =item devnull => ... |
|
|
| 697 | |
|
|
| 698 | Generic data sink/CPU heat conversion. |
|
|
| 699 | |
|
|
| 700 | =item relay => $port, @msg |
|
|
| 701 | |
|
|
| 702 | Simply forwards the message to the given port. |
|
|
| 703 | |
|
|
| 704 | =item eval => $string[ @reply] |
|
|
| 705 | |
|
|
| 706 | Evaluates the given string. If C<@reply> is given, then a message of the |
|
|
| 707 | form C<@reply, $@, @evalres> is sent. |
|
|
| 708 | |
|
|
| 709 | Example: crash another node. |
|
|
| 710 | |
|
|
| 711 | snd $othernode, eval => "exit"; |
|
|
| 712 | |
|
|
| 713 | =item time => @reply |
|
|
| 714 | |
|
|
| 715 | Replies the the current node time to C<@reply>. |
|
|
| 716 | |
|
|
| 717 | Example: tell the current node to send the current time to C<$myport> in a |
|
|
| 718 | C<timereply> message. |
|
|
| 719 | |
|
|
| 720 | snd $NODE, time => $myport, timereply => 1, 2; |
|
|
| 721 | # => snd $myport, timereply => 1, 2, <time> |
|
|
| 722 | |
683 | |
| 723 | =back |
684 | =back |
| 724 | |
685 | |
| 725 | =head1 AnyEvent::MP vs. Distributed Erlang |
686 | =head1 AnyEvent::MP vs. Distributed Erlang |
| 726 | |
687 | |
