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        <title>PHPCR Introduction</title>

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        <meta name="email" content="phpcr-users@googlegroups.com" />
        <meta name="date" content="2013-03-26" />
        <meta name="venue" content="The Internets" />

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        <div class="slide section" style="text-align:center">
            <h1>PHP Content Repository</h1>
            <h2><a href="http://phpcr.github.io">phpcr.github.io</a></h2>
        </div>

        <div class="slide" style="text-align:center">
            <h2>Data in a CMS is mostly unstructured</h2>
            <h2>RDBMS are not a good fit, hurray for NoSQL</h2>
            <h2><img src="square_in_a_circle.png" alt="like fitting a square into a circle" /></h2>
        </div>

        <div class="slide" style="text-align:center">
            <h2>CMS content as a tree/graph</h2>
            <h2>NoSQL not a good fit, hurray for Graph DBs</h2>
            <h2><img src="content_graph.png" alt="content graph" /></h2>
        </div>

        <div class="slide" style="text-align:center">
            <h2>CMS should handle versioning</h2>
            <h2><img src="versioning.png" alt="multiple versions" /></h2>
        </div>

        <div class="slide" style="text-align:center">
            <h2>Complexity shouldn't overwhelm developers</h2>
            <p style="font-size:1.3em;">Need a solution that can scale both from small to large projects and we rather not reinvent the wheel!</p>
        </div>

        <div class="slide">
            <h1 style="text-align:center">Enter PHPCR</h1>
            <p style="font-size:1.2em;">PHPCR provides a <strong>standardized API</strong> that can be used by any PHP content management system to interface with any content repository.</p>
        </div>

        <div class="slide">
            <h1>About PHPCR</h1>
            <ul>
                <li>Java Content Repository (JCR) standard adaptation</li>
                <li>Write applications once, switch storage backends</li>
                <li>Do not re-invent the content storage wheel</li>
                <li>PHPCR has been <a href="http://java.net/jira/browse/JSR_333-28" target="_blank">added</a> to the JCR 2.1 spec at the request of David Nüschler, JCR spec lead</li>
            </ul>
        </div>

        <div class="slide">
            <h1>PHPCR implementations</h1>
            <ul>
                <li>Jackalope
                    <ul>
                        <li>Jackrabbit (Davex) transport layer</li>
                        <li>Doctrine DBAL transport layer</li>
                    </ul>
                </li>
                <li>Midgard2 PHPCR</li>
                <li>...</li>
            </ul>
        </div>

        <div class="slide">
            <h1>PHPCR Features</h1>
            <ul>
                <li>Tree access</li>
                <li>Access by UUID</li>
                <li>Search nodes</li>
                <li>Versioning</li>
                <li>Capability discovery</li>
                <li>XML import and export</li>
                <li>Locking</li>
                <li>Transactions *</li>
                <li>Permissions</li>
                <li>Access Control *</li>
                <li>Observation (*)</li>
            </ul>
            <br/>
            <p>* Not yet implemented in Jackalope-Jackrabbit</p>
        </div>

        <div class="slide section">
            <h1>PHPCR concepts</h1>
        </div>

        <div class="slide">
            <h1>Hierarchical document store</h1>
            <ul>
                <li>All content is stored in a tree of nodes</li>
                <li>Nodes have a name and a type</li>
                <li>Nodes have child nodes and properties with values</li>
                <li>Values can be strings or numbers, but also binary file data or references to other nodes</li>
            </ul>
        </div>

        <div class="slide">
            <h1>Repository Content</h1>

            <pre class="brush: xml">
            <jcr:root>
              <cms>
                <pages>
                  <home title="Hello">
                    <block title="News"
                      content="Today: PHPCR presentation"/>
                  </home>
                  <contact title="Contact"
                    content="phpcr-users@groups.google.com"/>
                </pages>
              </cms>
            </jcr:root>
            </pre>
        </div>

        <div class="slide">
            <h1>Nodes</h1>
            <ul>
                <li>A <strong>Node</strong> is a named container located under a <strong>parent</strong> node</li>
                <li>Think of XML elements</li>
                <li>Can be created, deleted, modified, copied...</li>
                <li>Path is the parent path plus the node name<br/>&nbsp;
                    <ul>
                        <li>Path: <tt>/cms/pages/home</tt><br/>&nbsp;</li>
                        <li>Parent path: <tt>/cms/pages</tt></li>
                        <li>Node name: <tt>home</tt></li>
                    </ul>
                </li>
            </ul>
        </div>

        <div class="slide">
            <h1>Properties</h1>
            <ul>
                <li>A <strong>Node</strong> has named <strong>Properties</strong> with values</li>
                <li>Think of XML attributes</li>
                <li>Data types
                    <ul><li>STRING, URI, BOOLEAN, LONG, DOUBLE, DECIMAL, BINARY, DATE, NAME, PATH, WEAKREFERENCE, REFERENCE</li></ul>
                </li>
                <li>(WEAK)REFERENCE: Create links to other nodes<br/>&nbsp;</li>

                <li>Node and property names can use namespaces to avoid name collisions
                    <ul><li>jcr:created, jcr:mimeType, phpcr:class</li></ul>
                </li>
            </ul>
        </div>

        <div class="slide">
            <h1>Primary Node Types</h1>
            <ul>
                <li>Defines allowed names and types for properties and child nodes</li>
                <li>Every node must have a primary node type</li>
                <li>Use <tt>nt:unstructured</tt> to allow anything</li>
                <li>Some other built-in types: <tt>nt:address, nt:folder, nt:file</tt> ...</li>
                <li>Define custom types to control your "schema"</li>
            </ul>
        </div>

        <div class="slide">
            <h1>Mixin Node Types</h1>
            <ul>
                <li>No multiple inheritance for primary type.</li>
                <li>Mixins bring "traits" to your nodes.</li>
                <li>Mixin node types can be assigned to a node during that node's lifetime</li>
            </ul>
        </div>

        <div class="slide">
            <h1>Mixin Node Type Examples</h1>
            <ul>
                <li>mix:referenceable implies availability of property
                    <ul>
                        <li><tt>jcr:uuid</tt> containing a unique id</li>
                    </ul>
                </li>
                <li>mix:versionable extends mix:referenceable, implies availability of additional properties
                    <ul>
                        <li><tt>jcr:versionHistory, jcr:predecessors, jcr:baseVersion, jcr:isCheckedOut, jcr:mergeFailed</tt> properties)</li>
                    </ul>
                </li>
            </ul>
        </div>

        <div class="slide">
            <h1>Workspaces</h1>
            <ul>
                <li>Multiple workspaces, each with its own node tree</li>
                <li>Each workspace is similar to a Unix file system</li>
                <li>Workspaces are like branches in git/svn, allowing to clone and merge content</li>
                <li>But can also be used independently</li>
            </ul>
        </div>

        <div class="slide" style="text-align:center">
            <h1>PHPCR</h1>
            <p><img src="phpcr.png" alt="PHPCR class interaction diagramm" />
            <small style="white-space: nowrap; float:right; font-size: 16pt;">Source: phpcr.github.io</small></p>
        </div>

        <div class="slide section">
            <h1>PHPCR code examples</h1>
        </div>

        <div class="slide">
            <h1>Creating a session</h1>
            <pre class="brush: php">
                use PHPCR\SimpleCredentials;

                // start of implementation specific configuration //
                $parameters = array(
                    'jackalope.jackrabbit_uri'
                        => 'http://localhost:8080/server',
                );
                $factory = new \Jackalope\RepositoryFactoryJackrabbit();
                $repository = $factory->getRepository($parameters);
                // end of implementation specific configuration //

                $creds = new SimpleCredentials('admin','admin');
                $session = $repository->login($creds, 'default');
            </pre>
        </div>

        <div class="slide">
            <h1>CRUD operations</h1>
            <pre class="brush: php">
                $root = $session->getRootNode();

                // Nodes must be added as child of another node
                $node = $root->addNode('test', 'nt:unstructured');

                // New node is immediately available to this session
                $node = $session->getNode('/test');

                // Create/update a property
                $node->setProperty('prop', 'value');

                // New node is now available for all sessions
                $session->save();

                // Delete the node and all its children
                $node->remove();

                // Fails if a concurrent session also changed '/test'
                $session->save();
            </pre>
        </div>

        <div class="slide">
            <h1>Tree Traversal API</h1>
            <pre class="brush: php">
                $node = $session->getNode('/site/content');

                foreach ($node->getNodes() as $child) {
                    var_dump($child->getName());
                }

                // or in short
                foreach ($node as $child) {
                    var_dump($child->getName());
                }

                // filter on node names
                foreach ($node->getNodes('di*') as $child) {
                    var_dump($child->getName());
                }
            </pre>
        </div>

        <div class="slide">
            <h1>Versioning API</h1>
            <pre class="brush: php">
                // make versionable
                $node = $session->getNode('/site/content/about');
                $node->addMixin('mix:versionable');
                $session->save();
                // create initial version
                $node->setProperty('title', 'About');
                $session->save();

                // check-in (create version)
                // and check-out (prepare for further updates)
                // persisted immediately without a save() call
                $vm = $session->getWorkspace()->getVersionManager();
                $vm->checkpoint($node->getPath());
            </pre>
        </div>

        <div class="slide">
            <h1>Versioning API</h1>
            <pre class="brush: php">
                // update node with some changes
                $node->setProperty('title', 'Ups');
                $session->save();

                // create another version, leave in read only state
                $vm->checkin($node->getPath());

                $base = $vm->getBaseVersion($node->getPath());
                $current = $base->getLinearPredecessor();
                $previous = $current->getLinearPredecessor();

                // get snapshot of old version to look around
                $frozenNode = $previous->getFrozenNode();
                echo $frozenNode->getProperty('title'); // About

                // set the live data back to what is in this version
                $vm->restore(true, $previous);

                $node = $session->getNode('/site/content/about');
                echo $node->getProperty('title'); // About
            </pre>
        </div>

        <div class="slide">
            <h1>Search via SQL2 API</h1>
            <pre class="brush: php">
                $qm = $workspace->getQueryManager();

                // unlike SQL, in SQL2 "*" does not return all columns
                // but at least the path and match score
                $sql = "SELECT * FROM [nt:unstructured]
                    WHERE [nt:unstructured].type = 'nav'
                    AND ISDESCENDANTNODE('/some/path')
                    ORDER BY score, [nt:unstructured].title";
                $query = $qm->createQuery($sql, 'JCR-SQL2');
                $query->setLimit($limit);
                $query->setOffset($offset);
                $queryResult = $query->execute();

                foreach ($queryResult->getNodes() as $node) {
                    var_dump($node->getPath());
                }
            </pre>
        </div>

        <div class="slide">
            <h1>Search via QOM API</h1>
            <pre class="brush: php">
                $qm = $workspace->getQueryManager();
                $factory = $qm->getQOMFactory();

                // SELECT * FROM nt:file INNER JOIN nt:folder ON ISCHILDNODE(child, parent)
                $factory->createQuery(
                  $factory->join(
                    $factory->selector('nt:file'),
                    $factory->selector('nt:folder'),
                    Constants::JCR_JOIN_TYPE_INNER,
                    $factory->childNodeJoinCondition(
                        'child', 'parent')),
                  null,
                  array(),
                  array()
                );
            </pre>
        </div>

        <div class="slide">
            <h1>Search via Fluent Query API</h1>
            <p>(With phpcr-utils)</p>
            <pre class="brush: php">
                $qm = $workspace->getQueryManager();
                $factory = $qm->getQOMFactory();

                // SELECT * FROM nt:unstructured
                // WHERE name NOT IS NULL
                // LIMIT 10 OFFSET 10
                $qb = new QueryBuilder($factory);
                $qb->select($factory->selector('nt:unstructured'))
                   ->where($factory->propertyExistence('name'))
                   ->setFirstResult(10)
                   ->setMaxResults(10)
                   ->execute();
            </pre>
        </div>

        <div class="slide">
            <h1>Concurrent write operations</h1>

            <pre class="brush: php">
                $test = $session->getNode('/test');
                $test1 = $session1->getNode('/test');

                $test->remove();
                $test1->setProperty('prop', 'value');

                $session->save();

                // this will fail as the node is gone
                $session1->save();
            </pre>
        </div>

        <div class="slide">
            <h1>Locking</h1>

            <pre class="brush: php">
                // prepare
                $test = $session->getNode('/test');
                $test->addMixin('mix:lockable');
                $session->save();

                // use
                $lm = $session->getWorkspace()->getLockManager();
                // lock node and children for 5 seconds
                $lock = $lm->lock('/test', true, true, 5);

                $test1 = $session1->getNode('/test');

                // here you will get an exception that node is locked
                $test1->setProperty('prop', 'value');
            </pre>
        </div>

        <div class="slide">
            <h1>Quality</h1>
            <p style="font-size:1.2em">A test suite for PHPCR makes sure all implementations interpret the specification the same way.</p>
            <ul>
                <li>Higher quality of implementations</li>
                <li>Discover interpretation issues, better compatibility</li>
                <li>Implementors need to write less tests of their own</li>
            </ul>
        </div>

        <div class="slide">
            <h1>Quality</h1>

            <p style="font-size:1.2em"><a href="http://travis-ci.org/#!/jackalope/jackalope-jackrabbit">Test results</a> using Jackalope with the Jackrabbit backend.</p>
            <pre style="font-size:0.8em; margin-top:20px">
......................................S.........S.....II.....   61 / 1222 (  4%)
...........S.S...............................................  122 / 1222 (  9%)
...........SS.......SS.S.......S.............................  183 / 1222 ( 14%)
.............................................................  244 / 1222 ( 19%)
.............................................................  305 / 1222 ( 24%)
.............................................................  366 / 1222 ( 29%)
.............................................................  427 / 1222 ( 34%)
..............................S.........SSS..............I.I.  488 / 1222 ( 39%)
I.I.........................I...................I..I........S  549 / 1222 ( 44%)
I............................................................  610 / 1222 ( 49%)
.....S.......I.....................S..S......................  671 / 1222 ( 54%)
.................SS...............SSSS..S....................  732 / 1222 ( 59%)
.......................................................SSSSS.  793 / 1222 ( 64%)
..........................S.............I......S...........I.  854 / 1222 ( 69%)
.............................SS..................S...........  915 / 1222 ( 74%)
.............................................................  976 / 1222 ( 79%)
............................................................. 1037 / 1222 ( 84%)
...............................S............................. 1098 / 1222 ( 89%)
...........SSSS...........SSS................................ 1159 / 1222 ( 94%)
........................................SSSSSS............... 1220 / 1222 ( 99%)
.

Time: 03:23, Memory: 93.50Mb

OK, but incomplete or skipped tests!
Tests: 1212, Assertions: 6797, Incomplete: 17, Skipped: 49.
            </pre>
        </div>

        <div class="slide">
            <h1>Quality</h1>

            <p style="font-size:1.2em"><a href="http://travis-ci.org/#!/jackalope/jackalope-doctrine-dbal">Test results</a> using Jackalope with the Doctrine DBAL backend.</p>
            <pre style="font-size:0.8em; margin-top:20px">
....................S.........S.....II................S.S....   61 / 1185 (  5%)
......................................................SS.....  122 / 1185 ( 10%)
.........SS.S.......S........................................  183 / 1185 ( 15%)
.............................................................  244 / 1185 ( 20%)
.............................................................  305 / 1185 ( 25%)
.............................................................  366 / 1185 ( 30%)
.............................................................  427 / 1185 ( 36%)
......S...........S..............I.I.I.I.....................  488 / 1185 ( 41%)
...I...............I..I........SI............................  549 / 1185 ( 46%)
.....................................S.......I...............  610 / 1185 ( 51%)
......S..S...................................SS..............  671 / 1185 ( 56%)
.SSSS..S......SS............SSSSSS...........................  732 / 1185 ( 61%)
......S.............SSSSS..........................S.........  793 / 1185 ( 66%)
...S.I......S...........I............................SS......  854 / 1185 ( 72%)
................................S............................  915 / 1185 ( 77%)
.............................................................  976 / 1185 ( 82%)
............................................................. 1037 / 1185 ( 87%)
.....................................SSS...SSSSS.SSSSSSSSSSSS 1098 / 1185 ( 92%)
SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS 1159 / 1185 ( 97%)
S.S..SI................S

Time: 48 seconds, Memory: 212.50Mb

OK, but incomplete or skipped tests!
Tests: 1102, Assertions: 6251, Incomplete: 14, Skipped: 128.
            </pre>
        </div>

        <div class="slide">
            <h1>Doctrine PHPCR ODM</h1>
            <ul>
                <li>Object - Document mapper to map plain PHP objects to PHPCR data</li>
                <li>Supports the PHPCR concepts like children and references</li>
                <li><a href="http://cmf.symfony.com/slides/doctrine-phpcr-odm.html">See the PHPCR-ODM slides</a></li>
            </ul>
        </div>

        <div class="slide section">
            <h1>Conclusions</h1>
        </div>

        <div class="slide">
            <h1>Not all data fits well in PHPCR/JCR</h1>
            <ul>
                <li>For example aggregation is better done in an RDBMS</li>
                <li>Store web store product description in PHPCR/JCR</li>
                <li>Store web store inventory and orders in RDBMS</li>
            </ul>
        </div>

        <div class="slide" style="text-align:center">
            <h1>Door swings both ways, so remember</h1>
            <img src="square_in_a_circle.png" alt="like fitting a square into a circle" />
        </div>

        <div class="slide section" style="text-align:center">
            <h1>Play with it today!</h1>
            <h2><a href="https://github.com/phpcr/phpcr/blob/master/doc/Tutorial.md">PHPCR Tutorial</a></h2><br/>
            <br/>
            <h1>See it in action!</h1>
            <h2><a href="https://github.com/symfony-cmf/cmf-sandbox">Symfony2 CMF sandbox</a></h2>
        </div>

        <div class="slide">
            <img src="barometreprix.png" style="position:absolute; right: -150px; top: -130px; width:300px; -moz-transform:rotate(20deg); -webkit-transform:rotate(20deg); -ms-transform:rotate(20deg); -o-transform:rotate(20deg);" />
            <img src="knowledgebase.png" style="position:absolute; right: -160px; top: 20px; width:300px; -moz-transform:rotate(-15deg); -webkit-transform:rotate(-15deg); -ms-transform:rotate(-15deg); -o-transform:rotate(-15deg);" />
            <img src="liip_ch_website.png" style="position:absolute; right: -150px; top: 190px; width:300px; -moz-transform:rotate(5deg); -webkit-transform:rotate(5deg); -ms-transform:rotate(5deg); -o-transform:rotate(5deg);" />
            <img src="joiz.png" style="position:absolute; right: -130px; top: 400px; width:300px; -moz-transform:rotate(-15deg); -webkit-transform:rotate(-15deg); -ms-transform:rotate(-15deg); -o-transform:rotate(-15deg);" />
            <h1 style="padding-right: 40%">PHPCR in real live</h1>
            <ul style="padding-right: 40%; z-index: 12">
                <li><a href="https://github.com/servergrove/KnowledgeBase">ServerGrove KnowledgeBase</a></li>
                <li>Used as storage layer in the Symfony Content Management Framework
                    <ul>
                        <li><a href="http://www.barometredesprix.ch">Baromètre des prix</a> (Symfony2 CMF for static pages of an otherwise custom web application)</li>
                        <li><a href="http://www.liip.ch">Liip Company Website</a></li>
                        <li><a href="http://www.joiz.ch">Joiz</a> for static contents mixed with application generated content</li>
                        <li>Used in a Saas CRM service by Quiet Storm Solutions</li>
                    </ul>
                </li>
            </ul>
        </div>

        <div class="slide">
            <h1>Many individuals contribute to the effort</h1>
            <br />

            <table style="font-size: 0.7em">
                <tr>
                    <td>
                        <ul>
                            <li>0x616469 (Adrian Schlegel)</li>
                            <li>adou600 (Adrien Nicolet)</li>
                            <li>beberlei (Benjamin Eberlei)</li>
                            <li>bergie (Henri Bergius)</li>
                            <li>bmatzner (Bernd Matzner)</li>
                            <li>brki (Brian King)</li>
                            <li>chirimoya (Thomas Schedler)</li>
                            <li>chregu (Christian Stocker)</li>
                            <li>cordoval (Luis Cordova)</li>
                            <li>craigmarvelley (Craig Marvelley)</li>
                            <li>cryptocompress</li>
                            <li>damz (Damien Tournoud)</li>
                            <li>dbojdo (Daniel Bojdo)</li>
                            <li>dbu (David Buchmann)</li>
                            <li>dotZoki (Zoran)</li>
                            <li>ebi (Tobias Ebnöther)</li>
                            <li>fabian (Fabian Vogler)</li>
                            <li>flojon (Jonas Flodén)</li>
                            <li>iambrosi (Ismael Ambrosi)</li>
                            <li>jakuza (Jacopo Romei)</li>
                            <li>justinrainbow (Justin Rainbow)</li>
                            <li>k-fish/kdambekalns (Karsten Dambekalns)</li>
                            <li>krizon (Kristian Zondervan)</li>
                            <li>lapistano (Bastian Feder)</li>
                            <li>lsmith77 (Lukas K. Smith)</li>
                        </ul>
                    </td>
                    <td>
                        <ul>
                            <li>mdekrijger</li>
                            <li>micheleorselli (Michele Orselli)</li>
                            <li>nacmartin (Nacho Martín)</li>
                            <li>nicam (Pascal Helfenstein)</li>
                            <li>Ocramius (Marco Pivetta)</li>
                            <li>ornicar (Thibault Duplessis)</li>
                            <li>pajooh (arash)</li>
                            <li>petesiss (Pete Sisson)</li>
                            <li>piotras</li>
                            <li>pitpit (Damien Pitard)</li>
                            <li>rande (Thomas Rabaix)</li>
                            <li>richardmiller (Richard Miller)</li>
                            <li>rndstr (Roland Schilter)</li>
                            <li>robertlemke (Robert Lemke)</li>
                            <li>sebastien-roch (Sébastien Roch)</li>
                            <li>Seldaek (Jordi Boggiano)</li>
                            <li>simensen (Beau Simensen)</li>
                            <li>sixty-nine (Daniel Barsotti)</li>
                            <li>sjopet (Sjoerd Peters)</li>
                            <li>starkj (Johannes Stark)</li>
                            <li>stof (Christophe Coevoet)</li>
                            <li>uwej711 (Uwe Jäger)</li>
                            <li>vedranzgela (Vedran Zgela)</li>
                            <li>videlalvaro (Alvaro Videla)</li>
                            <li>...</li>
                        </ul>
                    </td>
                </tr>
            </table>
        </div>

        <div class="slide" style="text-align:center">
            <h1>Many projects have expressed interest</h1>
            <img src="phpcr_projects.png" alt="Symfony2 CMF, Midgard, Typo3, Nooku, ezPublish, Contao, Drupal" />
        </div>

        <div class="slide">
            <h1>Github projects</h1>
            <ul>
                <li><a href="https://github.com/phpcr/phpcr">PHPCR</a></li>
                <li><a href="https://github.com/phpcr/phpcr-api-tests">PHPCR test suite</a></li>
                <li><a href="https://github.com/jackalope/jackalope">Jackalope</a></li>
                <li><a href="https://github.com/midgardproject/phpcr-midgard2">Midgard2 CR</a></li>
                <li><a href="https://github.com/doctrine/phpcr-odm">PHPCR ODM</a></li>
            </ul>
        </div>

        <div class="slide">
            <h1>Resources</h1>
            <ul>
                <li><a href="irc://freenode/#jackalope">#jackalope IRC</a></li>
                <li><a href="irc://freenode/#phpcr">#phpcr IRC</a></li>
                <li><a href="http://phpcr.github.io">http://phpcr.github.io</a></li>
                <li><a href="http://jcp.org/en/jsr/detail?id=283">JSR 283 (aka JCR 2, especially Chapter 3)</a></li>
                <li><a href="http://jcp.org/en/jsr/detail?id=333">JSR 333 (aka JCR 2.1)</a></li>
                <li><a href="http://wiki.apache.org/jackrabbit/DavidsModel">David's Model</a></li>
                <li><a href="http://www.h2database.com/jcr/grammar.html">SQL2 Grammar</a></li>
            </ul>
        </div>

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            <div class="vcenter">
                <content></content>
            </div>
        </div>

        <div class="footer">
            <span class="left"><a href="http://phpcr.github.io">phpcr.github.io</a></span>
            <span class="right"><a href="irc://freenode/#phpcr">#phpcr IRC</a></span>
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