2 |
## $Id$ |
## $Id$ |
3 |
## -------------------------------------------------------------------------------- |
## -------------------------------------------------------------------------------- |
4 |
## $Log$ |
## $Log$ |
5 |
|
## Revision 1.8 2003/02/14 14:20:05 joko |
6 |
|
## + modified mixin behaviour |
7 |
|
## |
8 |
|
## Revision 1.7 2003/02/11 10:34:19 joko |
9 |
|
## + loaded module may now lack 'mixin::with' declaration |
10 |
|
## + this gets us the possibility to load modules from any perl namespace |
11 |
|
## + enabled this mechanism |
12 |
|
## |
13 |
|
## Revision 1.6 2003/02/09 16:22:51 joko |
14 |
|
## + pseudo constructor mechanism via options |
15 |
|
## |
16 |
|
## Revision 1.5 2003/01/31 01:19:50 root |
17 |
|
## + fixed: doesn't need Log::Dispatch any more, but uses it if available |
18 |
|
## |
19 |
|
## Revision 1.4 2003/01/20 16:55:15 joko |
20 |
|
## + sub mixinPackage |
21 |
|
## + sub include |
22 |
|
## |
23 |
|
## Revision 1.3 2002/12/16 19:57:12 joko |
24 |
|
## + sub unload |
25 |
|
## |
26 |
## Revision 1.2 2002/12/15 02:06:15 joko |
## Revision 1.2 2002/12/15 02:06:15 joko |
27 |
## + feature to be able to specify module in non-perl-style when loading plugins: e.g. $process->load('Setup/Storage') |
## + feature to be able to specify module in non-perl-style when loading plugins: e.g. $process->load('Setup/Storage') |
28 |
## |
## |
43 |
|
|
44 |
## ======== object inheritance ======== |
## ======== object inheritance ======== |
45 |
|
|
46 |
# TODO: |
# TODO / REFACTORING PROPOSAL |
47 |
|
# leading from Data::Storage to code abstracted out into this module - DesignPattern::Bridge |
48 |
# - this is no inheritance and it doesn't have to be |
# - this is no inheritance and it doesn't have to be |
49 |
# - implement this module as a bridge to its sub-modules |
# - implement this module as a bridge to its sub-modules |
50 |
# - use the BridgePattern (http://c2.com/cgi/wiki?BridgePattern) |
# - use the BridgePattern (http://c2.com/cgi/wiki?BridgePattern) |
55 |
# - sub getChildNodes |
# - sub getChildNodes |
56 |
# - sub run |
# - sub run |
57 |
|
|
58 |
|
# 2003-02-11, joko: does this have anything in parallel with CPAN's Class::Inner? |
59 |
|
|
60 |
|
|
61 |
# get logger instance |
# get logger instance |
62 |
my $logger = Log::Dispatch::Config->instance; |
my $logger = eval { Log::Dispatch::Config->instance; }; |
63 |
|
|
64 |
|
my $meta; |
65 |
|
|
66 |
## ======== object constructor ======== |
## ======== object constructor ======== |
67 |
sub new { |
sub new { |
68 |
my $invocant = shift; |
my $invocant = shift; |
69 |
my $class = ref($invocant) || $invocant; |
my $class = ref($invocant) || $invocant; |
70 |
my @args = (); |
my @args = (); |
71 |
@_ && (@args = @_); |
@_ && (@args = @_); |
72 |
$logger->debug( __PACKAGE__ . "->new(@args)" ); |
$logger->debug( __PACKAGE__ . "->new(@args)" ) if $logger; |
73 |
my $self = { @_ }; |
my $self = { @_ }; |
74 |
|
|
75 |
|
# trace |
76 |
#print "class: $class", "\n"; |
#print "class: $class", "\n"; |
77 |
bless $self, $class; |
|
78 |
##if (my $bizWorks = shift) { |
# create instance |
79 |
##$self->boot($bizWorks); |
bless $self, $class; |
80 |
##} |
|
81 |
|
return $self; |
82 |
return $self; |
} |
|
} |
|
83 |
|
|
84 |
|
|
85 |
## ======== method overrider ======== |
## ======== method overrider ======== |
93 |
my $method = $AUTOLOAD; |
my $method = $AUTOLOAD; |
94 |
$method =~ s/^.*:://; |
$method =~ s/^.*:://; |
95 |
|
|
96 |
$logger->debug( __PACKAGE__ . "->" . $method . "(@_)" . " (AUTOLOAD called, not dispatched)" ); |
$logger->debug( __PACKAGE__ . "->" . $method . "(@_)" . " (AUTOLOAD called, not dispatched)" ) if $logger; |
97 |
|
|
98 |
## ->DESTROY would - if not declared - trigger an AUTOLOAD also |
## ->DESTROY would - if not declared - trigger an AUTOLOAD also |
99 |
return if $method =~ m/::DESTROY$/; |
return if $method =~ m/::DESTROY$/; |
104 |
## } |
## } |
105 |
|
|
106 |
} |
} |
|
|
|
|
sub load { |
|
107 |
|
|
108 |
|
sub _getPluginPackage { |
109 |
my $self = shift; |
my $self = shift; |
110 |
|
my $modulename_load = shift; |
111 |
|
|
112 |
|
# substitute slashes through double double-colons to load modules perl-style |
113 |
|
$modulename_load =~ s/\//::/g; |
114 |
|
|
115 |
|
# build full package name |
116 |
my $self_classname = ref $self; |
my $self_classname = ref $self; |
117 |
|
# name |
118 |
|
my $package = $modulename_load; |
119 |
|
|
120 |
|
# if package is absolute, cut away prefix ('/' or '::') |
121 |
|
if ($package !~ s/^:://) { |
122 |
|
# else: prefix with base classname if above name is relative (lacks of '/' or '::') |
123 |
|
$package = $self_classname . '::' . $package |
124 |
|
} |
125 |
|
|
126 |
|
return $package; |
127 |
|
} |
128 |
|
|
129 |
|
sub load { |
130 |
|
|
131 |
|
my $self = shift; |
132 |
my $modulename_load = shift; |
my $modulename_load = shift; |
133 |
|
|
134 |
|
my $options = shift; |
135 |
|
|
136 |
|
my $self_modulename = ref $self; |
137 |
|
my $package = $self->_getPluginPackage($modulename_load); |
138 |
|
|
139 |
# substitute slashes through double double-colons to load modules perl-style |
if ($meta->{loaded}->{$package}) { |
140 |
$modulename_load =~ s/\//::/g; |
return 1; |
141 |
|
} |
142 |
|
|
143 |
my $package = $self_classname . '::' . $modulename_load; |
#$logger->info( __PACKAGE__ . "->load: $package" ) if $logger; |
144 |
$logger->info( __PACKAGE__ . "->load: $package" ); |
#$logger->info( __PACKAGE__ . "->load: $self_modulename" ) if $logger; |
145 |
|
$logger->debug( $self_modulename . "->load: $package\t[via " . __PACKAGE__ . "]" ) if $logger; |
146 |
|
|
147 |
# this is the module testing phase - use mixin doesn't seem to propagate errors by default |
# this is the module testing phase - use mixin doesn't seem to propagate errors by default |
148 |
eval("use $package;"); |
eval("use $package;"); |
149 |
if ($@) { |
if ($@) { |
150 |
|
$meta->{loaded}->{$package} = 0; |
151 |
# include caller information |
# include caller information |
152 |
my @caller = caller; |
my @caller = caller; |
153 |
my $caller_msg = $caller[1] . ':' . $caller[2]; |
my $caller_msg = $caller[1] . ':' . $caller[2]; |
154 |
$logger->error( __PACKAGE__ . "->load: $@ ($caller_msg)" ); |
my $msg = __PACKAGE__ . "->load: $@ ($caller_msg)"; |
155 |
|
if ($logger) { |
156 |
|
$logger->error($msg); |
157 |
|
} else { |
158 |
|
print $msg, "\n"; |
159 |
|
} |
160 |
} |
} |
161 |
|
|
162 |
#print "ref-1: ", ref $self, "\n"; |
#print "ref-1: ", ref $self, "\n"; |
166 |
#bless $self, $package; |
#bless $self, $package; |
167 |
|
|
168 |
# V2: |
# V2: |
169 |
|
$self->mixinPackage($package); |
170 |
|
|
171 |
|
if (my $method = $options->{method}) { |
172 |
|
$self->$method(); |
173 |
|
} |
174 |
|
|
175 |
|
return 1; |
176 |
|
|
177 |
|
} |
178 |
|
|
179 |
|
sub mixinPackage { |
180 |
|
my $self = shift; |
181 |
|
my $package = shift; |
182 |
|
|
183 |
|
# switch into foreign package and prepare for mixin |
184 |
|
$self->mixin_prepare($package); |
185 |
|
|
186 |
|
# switch into local package (scope which uses DesignPattern::Bridge) and mixin plugin-module |
187 |
|
$self->mixin_do($package); |
188 |
|
|
189 |
|
} |
190 |
|
|
191 |
|
# TODO: maybe refactor to DesignPattern::Object? what about the '$logger'? |
192 |
|
sub mixin_prepare { |
193 |
|
my $self = shift; |
194 |
|
my $package = shift; |
195 |
|
my $self_classname = ref $self; |
196 |
|
eval("package $package; use mixin::with '$self_classname';"); |
197 |
|
|
198 |
|
# FIXME: --- this is redundant --- |
199 |
|
if ($@) { |
200 |
|
$meta->{loaded}->{$package} = 0; |
201 |
|
$logger->error( __PACKAGE__ . "->load: $@" ) if $logger; |
202 |
|
} else { |
203 |
|
$meta->{loaded}->{$package} = 1; |
204 |
|
} |
205 |
|
# FIXME: --- this is redundant --- |
206 |
|
|
207 |
|
} |
208 |
|
|
209 |
|
sub mixin_do { |
210 |
|
my $self = shift; |
211 |
|
my $package = shift; |
212 |
# switch into foreign package and mixin plugin-module |
# switch into foreign package and mixin plugin-module |
213 |
|
my $self_classname = ref $self; |
214 |
eval("package $self_classname; use mixin '$package';"); |
eval("package $self_classname; use mixin '$package';"); |
215 |
#eval("use mixin_all '$package';"); |
#eval("use mixin_all '$package';"); |
216 |
|
|
217 |
|
# FIXME: --- this is redundant --- |
218 |
if ($@) { |
if ($@) { |
219 |
$logger->error( __PACKAGE__ . "->load: $@" ); |
$meta->{loaded}->{$package} = 0; |
220 |
|
$logger->error( __PACKAGE__ . "->load: $@" ) if $logger; |
221 |
|
} else { |
222 |
|
$meta->{loaded}->{$package} = 1; |
223 |
} |
} |
224 |
|
# FIXME: --- this is redundant --- |
225 |
|
|
226 |
|
} |
227 |
|
|
228 |
|
sub unload { |
229 |
|
|
230 |
|
my $self = shift; |
231 |
|
my $modulename_unload = shift; |
232 |
|
|
233 |
|
my $package = $self->_getPluginPackage($modulename_unload); |
234 |
|
|
235 |
|
if ($meta->{loaded}->{$package}) { |
236 |
|
$meta->{loaded}->{$package} = 0; |
237 |
|
my $where = __PACKAGE__ . ':' . __LINE__; |
238 |
|
$logger->debug( __PACKAGE__ . "->unload: FIXME: DESTROY object is not implemented at '$where'." ) if $logger; |
239 |
|
} |
240 |
|
|
241 |
} |
} |
242 |
|
|
243 |
|
|
244 |
sub boot { |
sub boot { |
245 |
my $self = shift; |
my $self = shift; |
246 |
$self->_abstract_function('boot'); |
$self->_abstract_function('boot'); |
247 |
} |
} |
248 |
|
|
249 |
|
sub include { |
250 |
|
my $self = shift; |
251 |
|
my $includefile = shift; |
252 |
|
my $package = shift; |
253 |
|
# TODO: do better error-detection here / prevent dies under all circumstances! |
254 |
|
require $includefile; |
255 |
|
$self->mixinPackage($package) if $package; |
256 |
|
} |
257 |
|
|
258 |
1; |
1; |
259 |
|
__END__ |