stas 2003/01/25 05:26:11
Added: lib/Apache Status.pm
Log:
started porting Apache::Status to 2.0:
- adjust style
- use mod_perl 2.0 api (trying to get away from using compat.pm)
- adjust the 'registry scripts' logic to work with the new registry cache
(present scripts by the handler they are compiled in)
Revision Changes Path
1.1 modperl-2.0/lib/Apache/Status.pm
Index: Status.pm
===================================================================
package Apache::Status;
use strict;
#use warnings; #XXX FATAL => 'all';
no warnings; # 'redefine';
# XXX: something is wrong with bleadperl, it warns about redefine
# warnings, when no warnings 'redefine' is set (test with 5.8.0). even
# when used with 'no warnings' it still barks on redefinining the
# constants
# XXX
# use mod_perl 2.0;
use Apache::RequestRec ();
use Apache::RequestUtil ();
use Apache::ServerUtil ();
$Apache::Status::VERSION = '3.00'; # mod_perl 2.0
use constant IS_WIN32 => ($^O eq "MSWin32");
my $Is_Win32 = ($^O eq "MSWin32");
my %is_installed = ();
{
local $SIG{__DIE__};
%is_installed = map {
$_, (eval("require $_") || 0);
} qw (Data::Dumper Devel::Symdump B Apache::Request
Apache::Peek Apache::Symbol);
}
our $newQ;
if ($is_installed{"Apache::Request"}) {
$newQ ||= sub { Apache::Request->new(@_) };
}
else {
$is_installed{"CGI"} = eval("require CGI") || 0;
$newQ ||= sub { CGI->new; };
}
my $CPAN_base = "http://cpan.org/modules/by-module/";;
my $install_symdump = <<EOF;
Please install the <a href="$CPAN_base/Devel/">Devel::Symdump</a> module.
EOF
my %status = (
script => "PerlRequire'd Files",
inc => "Loaded Modules",
rgysubs => "Compiled Registry Scripts",
'symdump' => "Symbol Table Dump",
inh_tree => "Inheritance Tree",
isa_tree => "ISA Tree",
env => "Environment",
sig => "Signal Handlers",
myconfig => "Perl Configuration",
hooks => "Enabled mod_perl Hooks",
);
delete $status{'hooks'} if $mod_perl::VERSION >= 1.9901;
delete $status{'sig'} if IS_WIN32;
# XXX: needs porting
if ($Apache::Server::SaveConfig) {
$status{"section_config"} = "Perl Section Configuration";
}
sub menu_item {
my($self, $key, $val, $sub) = @_;
$status{$key} = $val;
no strict;
*{"status_${key}"} = $sub if $sub and ref $sub eq 'CODE';
}
sub handler {
my($r) = @_;
Apache->request($r); #for Apache::CGI
my $qs = $r->args || "";
my $sub = "status_$qs";
no strict 'refs';
if ($qs =~ s/^(noh_\w+).*/$1/) {
return &{$qs}($r, $newQ->($r));
}
header($r);
if (defined &$sub) {
$r->print(@{ &{$sub}($r, $newQ->($r)) });
}
elsif ($qs and %{$qs."::"}) {
$r->print(symdump($r, $newQ->($r), $qs));
}
else {
my $uri = $r->uri;
$r->print(
map { qq[<a href="$uri?$_">$status{$_}</a><br>\n] } keys %status
);
}
$r->print("</body></html>");
1;
}
sub header {
my $r = shift;
my $start = scalar localtime $^T;
my $srv = Apache::get_server_version();
$r->content_type("text/html");
my $v = $^V ? sprintf "v%vd", $^V : $];
$r->print(<<"EOF");
<html>
<head><title>Apache::Status</title></head>
<body>
Embedded Perl version <b>$v</b> for <b>$srv</b> process <b>$$</b>,
<br> running since $start<hr>
EOF
}
sub symdump {
my($r, $q, $package) = @_;
return $install_symdump unless $is_installed{"Devel::Symdump"};
my $meth = "new";
$meth = "rnew" if lc($r->dir_config("StatusRdump")) eq "on";
my $sob = Devel::Symdump->$meth($package);
return $sob->Apache::Status::as_HTML($package, $r, $q);
}
sub status_symdump {
my($r, $q) = @_;
[symdump($r, $q, 'main')];
}
sub status_section_config {
my($r, $q) = @_;
require Apache::PerlSections;
["<pre>", Apache::PerlSections->dump, "</pre>"];
}
sub status_hooks {
my($r, $q) = @_;
# XXX: hooks list access doesn't exist yet in 2.0
require mod_perl;
require mod_perl_hooks;
my @retval = qw(<table>);
my @list = mod_perl::hooks();
for my $hook (sort @list) {
my $on_off =
mod_perl::hook($hook) ? "<b>Enabled</b>" : "<i>Disabled</i>";
push @retval, "<tr><td>$hook</td><td>$on_off</td></tr>\n";
}
push @retval, qw(</table>);
\@retval;
}
sub status_inc {
my($r, $q) = @_;
my $uri = $r->uri;
my @retval = (
"<table border=1>",
"<tr>",
(map "<td><b>$_</b></td>", qw(Package Version Modified File)),
"</tr>\n"
);
foreach my $file (sort keys %INC) {
local $^W = 0;
next if $file =~ m:^/:;
next unless $file =~ m:\.pm:;
next unless $INC{$file}; #e.g. fake Apache/TieHandle.pm
no strict 'refs';
(my $module = $file) =~ s,/,::,g;
$module =~ s,\.pm$,,;
my $v = ${"$module\:\:VERSION"} || '0.00';
push @retval, (
"<tr>",
(map "<td>$_</td>",
qq(<a href="$uri?$module">$module</a>),
$v, scalar localtime((stat $INC{$file})[9]), $INC{$file}),
"</tr>\n"
);
}
push @retval, "</table>\n";
push @retval, "<p><b>\@INC</b> = <br>", join "<br>\n", @INC, "";
\@retval;
}
sub status_script {
my($r, $q) = @_;
my @retval = (
"<table border=1>",
"<tr><td><b>PerlRequire</b></td><td><b>Location</b></td></tr>\n",
);
foreach my $file (sort keys %INC) {
next if $file =~ m:\.(pm|al|ix)$:;
push @retval,
qq(<tr><td>$file</td><td>$INC{$file}</td></tr>\n);
}
push @retval, "</table>";
\@retval;
}
my $RegistryCache;
sub registry_cache {
my($self, $cache) = @_;
# XXX: generalize
$RegistryCache = $cache if $cache;
$RegistryCache || $Apache::Registry;
}
sub get_packages_per_handler {
my($root, $stash) = @_;
my %handlers = ();
my @packages = get_packages($stash);
for (@packages) {
/^\*${root}::([\w:]+)::(\w+)::$/ && push @{ $handlers{$1} }, $2;
}
return %handlers;
}
sub get_packages {
my($stash) = @_;
no strict 'refs';
my @packages = ();
for (keys %$stash) {
return $stash unless $stash->{$_} =~ /::$/;
push @packages, get_packages($stash->{$_});
}
return @packages;
}
sub status_rgysubs {
my($r, $q) = @_;
local $_;
my $uri = $r->uri;
my $cache = __PACKAGE__->registry_cache;
my @retval = "<h2>Compiled registry scripts grouped by their handler</h2>";
push @retval, "<b>Click on package name to see its symbol table</b><p>\n";
my $root = "ModPerl::ROOT";
no strict 'refs';
my %handlers = get_packages_per_handler($root, *{$root . "::"});
for my $handler (sort keys %handlers) {
push @retval, "<h4>$handler:</h4>";
for (sort @{ $handlers{$handler} }) {
my $full = join '::', $root, $handler, $_;
push @retval, qq(<a href="$uri?$full">$_</a>\n), "<br>";
}
}
\@retval;
}
sub status_env {
["<pre>",
(map { "$_ = $ENV{$_}\n" } sort keys %ENV),
"</pre>"];
}
sub status_sig {
["<pre>",
(map {
my $val = $SIG{$_} || "";
if ($val and ref $val eq "CODE") {
if (my $cv = Apache::Symbol->can('sv_name')) {
$val = "\\&". $cv->($val);
}
}
"$_ = $val\n" }
sort keys %SIG),
"</pre>"];
}
sub status_myconfig {
require Config;
["<pre>", Config::myconfig(), "</pre>"]
}
sub status_inh_tree {
return $is_installed{"Devel::Symdump"}
? ["<pre>", Devel::Symdump->inh_tree, "</pre>"]
: $install_symdump;
}
sub status_isa_tree {
return $is_installed{"Devel::Symdump"}
? ["<pre>", Devel::Symdump->isa_tree, "</pre>"]
: $install_symdump;
}
sub status_data_dump {
my($r, $q) = @_;
my($name, $type) = (split "/", $r->uri)[-2,-1];
my $script = $q->script_name;
no strict 'refs';
my @retval = "Data Dump of $name $type <pre>\n";
my $str = Data::Dumper->Dump([*$name{$type}], ['*'.$name]);
$str =~ s/= \\/= /; #whack backwack
push @retval, $str, "\n";
push @retval, peek_link($r, $q, $name, $type);
push @retval, b_graph_link($r, $q, $name);
push @retval, "</pre>";
\@retval;
}
sub cv_file {
my $obj = shift;
$obj->can('FILEGV') ? $obj->FILEGV->SV->PV : $obj->FILE;
}
sub status_cv_dump {
my($r, $q) = @_;
return [] unless $is_installed{B};
no strict 'refs';
my($name, $type) = (split "/", $r->uri)[-2,-1];
my @retval = "Subroutine info for <b>$name</b> <pre>\n";
my $script = $q->script_name;
my $obj = B::svref_2object(*$name{CODE});
my $file = cv_file($obj);
my $stash = $obj->GV->STASH->NAME;
push @retval, "File: ",
(-e $file ? qq(<a href="file:$file">$file</a>) : $file), "\n";
my $cv = $obj->GV->CV;
my $proto = $cv->PV if $cv->can('PV');
push @retval, qq(Package: <a href="$script?$stash">$stash</a>\n);
push @retval, "Line: ", $obj->GV->LINE, "\n";
push @retval, "Prototype: ", $proto || "none", "\n";
push @retval, "XSUB: ", $obj->XSUB ? "yes" : "no", "\n";
push @retval, peek_link($r, $q, $name, $type);
#push @retval, xref_link($r, $q, $name);
push @retval, b_graph_link($r, $q, $name);
push @retval, b_lexinfo_link($r, $q, $name);
push @retval, b_terse_link($r, $q, $name);
push @retval, b_terse_size_link($r, $q, $name);
push @retval, b_deparse_link($r, $q, $name);
push @retval, b_fathom_link($r, $q, $name);
push @retval, "</pre>";
\@retval;
}
sub status_config {
my($r, $key) = @_;
return (lc($r->dir_config($key)) eq "on") ||
(lc($r->dir_config('StatusOptionsAll')) eq "on");
}
sub b_graph_link {
my($r, $q, $name) = @_;
return unless status_config($r, "StatusGraph");
return unless eval { require B::Graph };
B::Graph->UNIVERSAL::VERSION('0.03');
my $script = $q->script_name;
return qq(\n<a href="$script/$name?noh_b_graph">OP Tree Graph</a>\n);
}
sub b_lexinfo_link {
my($r, $q, $name) = @_;
return unless status_config($r, "StatusLexInfo");
return unless eval { require B::LexInfo };
my $script = $q->script_name;
return qq(\n<a href="$script/$name?noh_b_lexinfo">Lexical Info</a>\n);
}
sub noh_b_lexinfo {
my $r = shift;
$r->content_type("text/plain");
no strict 'refs';
my($name) = (split "/", $r->uri)[-1];
$r->print("Lexical Info for $name\n\n");
my $lexi = B::LexInfo->new;
my $info = $lexi->cvlexinfo($name);
$r->print(${ $lexi->dumper($info) });
}
my %b_terse_exp = ('slow' => 'syntax', 'exec' => 'execution');
sub b_terse_link {
my($r, $q, $name) = @_;
return unless status_config($r, "StatusTerse");
return unless eval { require B::Terse };
my $script = $q->script_name;
my @retval;
for (qw(exec slow)) {
my $exp = "$b_terse_exp{$_} order";
push @retval,
qq(\n<a href="$script/$_/$name?noh_b_terse">Syntax Tree Dump
($exp)</a>\n);
}
join '', @retval;
}
sub noh_b_terse {
my $r = shift;
return unless eval { require B::Terse };
$r->content_type("text/plain");
no strict 'refs';
my($arg, $name) = (split "/", $r->uri)[-2,-1];
$r->print("Syntax Tree Dump ($b_terse_exp{$arg}) for $name\n\n");
B::Terse::compile($arg, $name)->();
}
sub b_terse_size_link {
my($r, $q, $name) = @_;
return unless status_config($r, "StatusTerseSize");
return unless eval { require B::TerseSize };
my $script = $q->script_name;
my @retval;
for (qw(exec slow)) {
my $exp = "$b_terse_exp{$_} order";
push @retval,
qq(\n<a href="$script/$_/$name?noh_b_terse_size">Syntax Tree Size
($exp)</a>\n);
}
join '', @retval;
}
sub noh_b_terse_size {
my $r = shift;
return unless eval { require B::TerseSize };
$r->content_type("text/html");
$r->print('<pre>');
my($arg, $name) = (split "/", $r->uri)[-2,-1];
my $uri = $r->location;
my $link = qq{<a href="$uri/$name/CODE?cv_dump">$name</a>};
$r->print("Syntax Tree Size ($b_terse_exp{$arg} order) for $link\n\n");
B::TerseSize::compile($arg, $name)->();
}
sub b_package_size_link {
my($r, $q, $name) = @_;
return unless status_config($r, "StatusPackageSize");
return unless eval { require B::TerseSize };
my $script = $q->script_name;
qq(<a href="$script/$name?noh_b_package_size">Memory Usage</a>\n);
}
sub noh_b_package_size {
my($r, $q) = @_;
return unless eval { require B::TerseSize };
$r->content_type("text/html");
$r->print('<pre>');
no strict 'refs';
my($package) = (split "/", $r->uri)[-1];
my $script = $q->script_name;
$r->print("Memory Usage for package $package\n\n");
my($subs, $opcount, $opsize) = B::TerseSize::package_size($package);
$r->print("Totals: $opsize bytes | $opcount OPs\n\n");
my $nlen = 0;
my @keys = map {
$nlen = length > $nlen ? length : $nlen;
$_;
} (sort { $subs->{$b}->{size} <=> $subs->{$a}->{size} } keys %$subs);
my $clen = length $subs->{$keys[0]}->{count};
my $slen = length $subs->{$keys[0]}->{size};
for my $name (@keys) {
my $stats = $subs->{$name};
if ($name =~ /^my /) {
$r->printf("%-${nlen}s %${slen}d bytes\n", $name, $stats->{size});
}
elsif ($name =~ /^\*(\w+)\{(\w+)\}/) {
my $link = qq(<a href="$script/$package\::$1/$2?data_dump">);
$r->printf("$link%-${nlen}s</a> %${slen}d bytes\n",
$name, $stats->{size});
}
else {
my $link =
qq(<a href="$script/slow/$package\::$name?noh_b_terse_size">);
$r->printf("$link%-${nlen}s</a> %${slen}d bytes | %${clen}d OPs\n",
$name, $stats->{size}, $stats->{count});
}
}
}
sub b_deparse_link {
my($r, $q, $name) = @_;
return unless status_config($r, "StatusDeparse");
return unless eval { require B::Deparse };
return unless $B::Deparse::VERSION >= 0.59;
my $script = $q->script_name;
return qq(\n<a href="$script/$name?noh_b_deparse">Deparse</a>\n);
}
sub noh_b_deparse {
my $r = shift;
$r->content_type("text/plain");
my $name = (split "/", $r->uri)[-1];
$r->print("Deparse of $name\n\n");
my $deparse = B::Deparse->new(split /\s+/,
$r->dir_config('StatusDeparseOptions')||"");
my $body = $deparse->coderef2text(\&{$name});
$r->print("sub $name $body");
}
sub b_fathom_link {
my($r, $q, $name) = @_;
return unless status_config($r, "StatusFathom");
return unless eval { require B::Fathom };
return unless $B::Fathom::VERSION >= 0.05;
my $script = $q->script_name;
return qq(\n<a href="$script/$name?noh_b_fathom">Fathom Score</a>\n);
}
sub noh_b_fathom {
my $r = shift;
$r->content_type("text/plain");
my $name = (split "/", $r->uri)[-1];
$r->print("Fathom Score of $name\n\n");
my $fathom = B::Fathom->new(split /\s+/,
$r->dir_config('StatusFathomOptions')||"");
$r->print($fathom->fathom(\&{$name}));
}
sub peek_link {
my($r, $q, $name, $type) = @_;
return unless status_config($r, "StatusPeek");
return unless $is_installed{"Apache::Peek"};
my $script = $q->script_name;
return qq(\n<a href="$script/$name/$type?noh_peek">Peek Dump</a>\n);
}
sub noh_peek {
my $r = shift;
$r->content_type("text/plain");
no strict 'refs';
my($name, $type) = (split "/", $r->uri)[-2,-1];
$type =~ s/^FUNCTION$/CODE/;
$r->print("Peek Dump of $name $type\n\n");
Apache::Peek::Dump(*{$name}{$type});
}
sub xref_link {
my($r, $q, $name) = @_;
return unless $is_installed{"B::Xref"};
my $script = $q->script_name;
return qq(\n<a href="$script/$name?noh_xref">Cross Reference Report</a>\n);
}
sub noh_xref {
my $r = shift;
$r->content_type("text/plain");
require B::Xref;
(my $thing = $r->path_info) =~ s:^/::;
print "Xref of $thing\n";
B::Xref::compile($thing)->();
}
$Apache::Status::BGraphCache ||= 0;
if ($Apache::Status::BGraphCache) {
Apache->push_handlers(PerlChildExitHandler => sub {
unlink keys %Apache::Status::BGraphCache;
});
}
sub noh_b_graph {
my $r = shift;
require B::Graph;
untie *STDOUT;
my $dir = $r->server_root_relative(
$r->dir_config("GraphDir") || "logs/b_graphs");
mkdir $dir, 0755 unless -d $dir;
(my $thing = $r->path_info) =~ s:^/::;
$thing =~ s{::}{-}g; # :: is not allowed in the filename on some OS
my $type = "dot";
my $file = "$dir/$thing.$$.gif";
unless (-e $file) {
tie *STDOUT, "B::Graph", $r, $file;
B::Graph::compile("-$type", $thing)->();
(tied *STDOUT)->{graph}->close;
}
if (-s $file) {
local *FH;
open FH, $file or die "Can't open $file: $!";
$r->content_type("image/gif");
$r->send_fd(\*FH);
}
else {
$r->content_type("text/plain");
$r->print("Graph of $thing failed!\n");
}
if ($Apache::Status::BGraphCache) {
$Apache::Status::BGraphCache{$file}++;
}
else {
unlink $file;
}
0;
}
sub B::Graph::TIEHANDLE {
my($class, $r, $file) = @_;
if ($file =~ /^([^<>|;]+)$/) {
$file = $1;
}
else {
die "TAINTED data in THING=> ($file)";
}
$ENV{PATH} = join ":", qw{/usr/bin /usr/local/bin};
my $dot = $r->dir_config("Dot") || "dot";
require IO::File;
my $pipe = IO::File->new("|$dot -Tgif -o $file");
$pipe or die "can't open pipe to dot $!";
$pipe->autoflush(1);
return bless {
graph => $pipe,
r => $r,
}, $class;
}
sub B::Graph::PRINT {
my $self = shift;
$self->{graph}->print(@_);
}
my %can_dump = map {$_,1} qw(scalars arrays hashes);
sub as_HTML {
my($self, $package, $r, $q) = @_;
my @m = qw(<TABLE>);
my $uri = $r->uri;
my $is_main = $package eq "main";
my $do_dump = status_config($r, "StatusDumper");
my @methods = sort keys %{$self->{'AUTOLOAD'}};
if ($is_main) {
@methods = grep { $_ ne "packages" } @methods;
unshift @methods, "packages";
}
for my $type (@methods) {
(my $dtype = uc $type) =~ s/E?S$//;
push @m, "<TR><TD valign=top><B>$type</B></TD>";
my @line = ();
for (sort $self->_partdump(uc $type)) {
s/([\000-\037\177])/ '^' . pack('c', ord($1) ^ 64)/eg;
if ($type eq "scalars") {
no strict 'refs';
next unless defined eval { $$_ };
}
if ($type eq "packages") {
push @line, qq(<a href="$uri?$_">$_</a>);
}
elsif ($type eq "functions") {
if ($is_installed{B}) {
push @line, qq(<a href="$uri/$_/$dtype?cv_dump">$_</a>);
}
else {
push @line, $_;
}
}
elsif ($do_dump and $can_dump{$type} and
$is_installed{"Data::Dumper"}) {
next if /_</;
push @line, qq(<a href="$uri/$_/$dtype?data_dump">$_</a>);
}
else {
push @line, $_;
}
}
push @m, "<TD>" . join(", ", @line) . "</TD></TR>\n";
}
push @m, "</TABLE>";
return join "\n", @m, "<hr>", b_package_size_link($r, $q, $package);
}
1;
__END__
=head1 NAME
Apache::Status - Embedded interpreter status information
=head1 SYNOPSIS
<Location /perl-status>
SetHandler perl-script
PerlResponseHandler Apache::Status
</Location>
=head1 DESCRIPTION
The B<Apache::Status> module provides some information
about the status of the Perl interpreter embedded in the server.
Configure like so:
<Location /perl-status>
SetHandler perl-script
PerlResponseHandler Apache::Status
</Location>
Other modules can "plugin" a menu item like so:
Apache::Status->menu_item(
'DBI' => "DBI connections", #item for Apache::DBI module
sub {
my($r,$q) = @_; #request and CGI objects
my(@strings);
push @strings, "blobs of html";
return \@strings; #return an array ref
}
) if Apache->module("Apache::Status"); #only if Apache::Status is loaded
B<WARNING>: Apache::Status must be loaded before these modules via the
PerlModule or PerlRequire directives.
=head1 OPTIONS
=over 4
=item StatusOptionsAll
This single directive will enable all of the options described below.
PerlSetVar StatusOptionsAll On
=item StatusDumper
When browsing symbol tables, the values of arrays, hashes ans calars
can be viewed via B<Data::Dumper> if this configuration variable is set
to On:
PerlSetVar StatusDumper On
=item StatusPeek
With this option On and the B<Apache::Peek> module installed,
functions and variables can be viewed ala B<Devel::Peek> style:
PerlSetVar StatusPeek On
=item StatusLexInfo
With this option On and the B<B::LexInfo> module installed,
subroutine lexical variable information can be viewed.
PerlSetVar StatusLexInfo On
=item StatusDeparse
With this option On and B<B::Deparse> version 0.59 or higher
(included in Perl 5.005_59+), subroutines can be "deparsed".
PerlSetVar StatusDeparse On
Options can be passed to B::Deparse::new like so:
PerlSetVar StatusDeparseOptions "-p -sC"
See the B<B::Deparse> manpage for details.
=item StatusTerse
With this option On, text-based op tree graphs of subroutines can be
displayed, thanks to B<B::Terse>.
PerlSetVar StatusTerse On
=item StatusTerseSize
With this option On and the B<B::TerseSize> module installed,
text-based op tree graphs of subroutines and their size can be
displayed. See the B<B::TerseSize> docs for more info.
PerlSetVar StatusTerseSize On
=item StatusTerseSizeMainSummary
With this option On and the B<B::TerseSize> module installed, a
"Memory Usage" will be added to the Apache::Status main menu. This
option is disabled by default, as it can be rather cpu intensive to
summarize memory usage for the entire server. It is strongly
suggested that this option only be used with a development server
running in B<-X> mode, as the results will be cached.
PerlSetVar StatusTerseSizeMainSummary On
=item StatusGraph
When B<StatusDumper> is enabled, another link "OP Tree Graph" will be
present with the dump if this configuration variable is set to On:
PerlSetVar StatusGraph
This requires the B module (part of the Perl compiler kit) and
B::Graph (version 0.03 or higher) module to be installed along with
the B<dot> program.
Dot is part of the graph visualization toolkit from AT&T:
C<http://www.research.att.com/sw/tools/graphviz/>).
B<WARNING>: Some graphs may produce very large images, some graphs may
produce no image if B::Graph's output is incorrect.
=item Dot
Location of the dot program for StatusGraph,
if other than /usr/bin or /usr/local/bin
=item GraphDir
Directory where StatusGraph should write it's temporary image files.
Default is $ServerRoot/logs/b_graphs
=back
=head1 PREREQUISITES
The I<Devel::Symdump> module, version B<2.00> or higher.
=head1 SEE ALSO
perl(1), Apache(3), Devel::Symdump(3), Data::Dumper(3), B(3), B::Graph(3)
=head1 AUTHOR
Doug MacEachern
