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4e446335 |
1 | package Object::Remote::Logging::Router; |
2 | |
3 | use Moo; |
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4 | use Scalar::Util qw(weaken); |
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5 | use Sys::Hostname; |
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6 | |
7 | with 'Log::Contextual::Role::Router'; |
8 | with 'Object::Remote::Role::LogForwarder'; |
9 | |
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10 | has _connections => ( is => 'ro', required => 1, default => sub { [] } ); |
11 | has _remote_metadata => ( is => 'rw' ); |
12 | |
13 | sub before_import { |
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14 | my ($self, $controller, $importer, $spec) = @_; |
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15 | } |
16 | |
17 | sub after_import { } |
18 | |
19 | sub _get_loggers { |
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20 | my ($self, %metadata) = @_; |
21 | my $package = $metadata{package}; |
22 | my $level = $metadata{level}; |
23 | my $is_level = "is_$level"; |
24 | my $need_clean = 0; |
25 | my @loggers; |
26 | |
27 | foreach my $selector (@{$self->_connections}) { |
28 | unless(defined $selector) { |
29 | $need_clean = 1; |
30 | next; |
31 | } |
32 | |
33 | foreach my $logger ($selector->($package, { %metadata })) { |
34 | next unless defined $logger; |
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35 | next unless $logger->$is_level; |
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36 | push(@loggers, $logger); |
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37 | } |
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38 | } |
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39 | |
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40 | $self->_clean_connections if $need_clean; |
41 | |
42 | return @loggers; |
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43 | } |
44 | |
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45 | #overloadable so a router can invoke a logger |
46 | #in a different way |
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47 | sub _invoke_logger { |
48 | my ($self, $logger, $level_name, $content, $metadata) = @_; |
49 | #Invoking the logger like this gets all available data to the |
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50 | #logging object with out losing any information from the datastructure. |
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51 | #This is not a backwards compatible way to invoke the loggers |
52 | #but it enables a lot of flexibility in the logger. |
53 | #The l-c router could have this method invoke the logger in |
54 | #a backwards compatible way and router sub classes invoke |
55 | #it in non-backwards compatible ways if desired |
56 | $logger->$level_name($content, $metadata); |
57 | } |
58 | |
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59 | #overloadable so forwarding can have the updated |
60 | #metadata but does not have to wrap get_loggers |
61 | #which has too many drawbacks |
62 | sub _deliver_message { |
63 | my ($self, $level, $generator, $args, $metadata) = @_; |
64 | my @loggers = $self->_get_loggers(%$metadata); |
65 | |
66 | return unless @loggers > 0; |
67 | #this is the point where the user provided log message |
68 | #code block is executed |
69 | my @content = $generator->(@$args); |
70 | foreach my $logger (@loggers) { |
71 | $self->_invoke_logger($logger, $level, \@content, $metadata); |
72 | } |
73 | } |
74 | |
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75 | sub handle_log_request { |
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76 | my ($self, $metadata_in, $generator, @args) = @_; |
77 | my %metadata = %{$metadata_in}; |
78 | my $level = $metadata{level}; |
79 | my $package = $metadata{package}; |
80 | my $need_clean = 0; |
81 | |
82 | #caller_level is useless when log forwarding is in place |
83 | #so we won't tempt people with using it for now - access |
84 | #to caller level will be available in the future |
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85 | my $caller_level = delete $metadata{caller_level}; |
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86 | $metadata{object_remote} = $self->_remote_metadata; |
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87 | $metadata{timestamp} = time; |
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88 | $metadata{pid} = $$; |
89 | $metadata{hostname} = hostname; |
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90 | |
91 | my @caller_info = caller($caller_level); |
92 | $metadata{filename} = $caller_info[1]; |
93 | $metadata{line} = $caller_info[2]; |
94 | |
95 | @caller_info = caller($caller_level + 1); |
96 | $metadata{method} = $caller_info[3]; |
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97 | $metadata{method} =~ s/^${package}::// if defined $metadata{method}; |
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98 | |
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99 | $self->_deliver_message($level, $generator, [ @args ], \%metadata); |
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100 | } |
101 | |
102 | sub connect { |
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103 | my ($self, $destination, $is_weak) = @_; |
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104 | my $wrapped; |
105 | |
106 | if (ref($destination) ne 'CODE') { |
107 | $wrapped = sub { $destination }; |
108 | } else { |
109 | $wrapped = $destination; |
110 | } |
111 | |
112 | push(@{$self->_connections}, $wrapped); |
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113 | weaken($self->_connections->[-1]) if $is_weak; |
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114 | } |
115 | |
116 | sub _clean_connections { |
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117 | my ($self) = @_; |
118 | @{$self->{_connections}} = grep { defined } @{$self->{_connections}}; |
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119 | } |
120 | |
121 | 1; |