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126 .IX Title "PPI::Cache 3"
127 .TH PPI::Cache 3 "2009-08-08" "perl v5.8.7" "User Contributed Perl Documentation"
128 .\" For nroff, turn off justification. Always turn off hyphenation; it makes
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133 PPI::Cache \- The PPI Document Caching Layer
135 .IX Header "SYNOPSIS"
138 \& use PPI::Cache path => \*(Aq/var/cache/ppi\-cache\*(Aq;
140 \& # Manually create a cache
141 \& my $Cache = PPI::Cache\->new(
142 \& path => \*(Aq/var/cache/perl/class\-PPI\*(Aq,
147 .IX Header "DESCRIPTION"
148 \&\f(CW\*(C`PPI::Cache\*(C'\fR provides the default caching functionality for \s-1PPI\s0.
150 It integrates automatically with \s-1PPI\s0 itself. Once enabled, any attempt
151 to load a document from the filesystem will be cached via cache.
153 Please note that creating a PPI::Document from raw source or something
154 other object will \fBnot\fR be cached.
155 .SS "Using PPI::Cache"
156 .IX Subsection "Using PPI::Cache"
157 The most common way of using \f(CW\*(C`PPI::Cache\*(C'\fR is to provide parameters to
158 the \f(CW\*(C`use\*(C'\fR statement at the beginning of your program.
161 \& # Load the class but do not set a cache
164 \& # Use a fairly normal cache location
165 \& use PPI::Cache path => \*(Aq/var/cache/ppi\-cache\*(Aq;
168 Any of the arguments that can be provided to the \f(CW\*(C`new\*(C'\fR constructor can
169 also be provided to \f(CW\*(C`use\*(C'\fR.
172 .ie n .SS "new param => $value, ..."
173 .el .SS "new param => \f(CW$value\fP, ..."
174 .IX Subsection "new param => $value, ..."
175 The \f(CW\*(C`new\*(C'\fR constructor creates a new standalone cache object.
177 It takes a number of parameters to control the cache.
180 The \f(CW\*(C`path\*(C'\fR param sets the base directory for the cache. It must already
181 exist, and must be writable.
184 The \f(CW\*(C`readonly\*(C'\fR param is a true/false flag that allows the use of an
185 existing cache by a less-privileged user (such as the web user).
187 Existing documents will be retrieved from the cache, but new documents
188 will not be written to it.
190 Returns a new \f(CW\*(C`PPI::Cache\*(C'\fR object, or dies on error.
192 .IX Subsection "path"
193 The \f(CW\*(C`path\*(C'\fR accessor returns the path on the local filesystem that is the
196 .IX Subsection "readonly"
197 The \f(CW\*(C`readonly\*(C'\fR accessor returns true if documents should not be written
199 .ie n .SS "get_document $md5sum | \e$source"
200 .el .SS "get_document \f(CW$md5sum\fP | \e$source"
201 .IX Subsection "get_document $md5sum | $source"
202 The \f(CW\*(C`get_document\*(C'\fR method checks to see if a Document is stored in the
203 cache and retrieves it if so.
204 .ie n .SS "store_document $Document"
205 .el .SS "store_document \f(CW$Document\fP"
206 .IX Subsection "store_document $Document"
207 The \f(CW\*(C`store_document\*(C'\fR method takes a PPI::Document as argument and
208 explicitly adds it to the cache.
210 Returns true if saved, or \f(CW\*(C`undef\*(C'\fR (or dies) on error.
212 \&\s-1FIXME\s0 (make this return either one or the other, not both)
215 \&\- Finish the basic functionality
217 \&\- Add support for use PPI::Cache auto-setting \f(CW$PPI::Document::CACHE\fR
220 See the support section in the main module.
223 Adam Kennedy <adamk@cpan.org>
225 .IX Header "COPYRIGHT"
226 Copyright 2005 Adam Kennedy.
228 This program is free software; you can redistribute
229 it and/or modify it under the same terms as Perl itself.
231 The full text of the license can be found in the
232 \&\s-1LICENSE\s0 file included with this module.