phpcr - standard content repository for php
DESCRIPTION
Content repositories session from the PHP track at FrOSCon 2011.TRANSCRIPT
PHPCR
Standard Interface for Content Repositories
github.com/bergie/noflo
github.com/bergie/phpflo
Same API, multiple repositories
● Jackalope● Apache Jackrabbit:
Java-based repository server, accessible through WebDAV
● Doctrine: pure-PHP repository library
● github.com/jackalope/jackalope
● Midgard● GObject-oriented
repository library accessible through PHP extension
● Python, JavaScript, Java, ...
● github.com/bergie/phpcr-midgard2
Why use Midgard?
Developers write against a single API
Implementations can be chosen based on deployment needs
“Products in MySQL, blog entries in CouchDB”
Standard: JSR-283Day Management AG, Switzerland 10-August-2009
Release note
Product: Specification for Content Repository for Java(tm) Technology API 2.0Version: 2.0 Type: Full Release----------------------------------------------------------------------
This package consists of the following components:
1) Specification documents: spec/2) Applicable Licenses: license/3) API Source code: src/4) pre-built API .jar-file: lib/5) generated javadoc: docs/
For questions or comments feel free to use [email protected]
Further information about JSR 283 can be found athttp://www.jcp.org/en/jsr/detail?id=283
Content Management Interoperability Services
● JCR-like API using HTTP and Atom (or SOAP)
● Quite complicated, but language-agnostic
● OASIS spec since 2010● Good implementations in
enterprise document management systems
● Proponents include Microsoft, Nuxeo and Alfresco
The next version of JCR will also include PHP scripting bindings, i.e. PHPCR
PHPCR is a collection of interfaces
...and API testsbergie@AirDrone:~/Projects/phpcr-midgard2/api-test$ phpunit PHPUnit 3.5.5 by Sebastian Bergmann.
I.IIISSSSSSSSS..S.............E..ESSSSSSSSSSSSSSSSSSSSSSSSEE 60 / 552.........FFSSSSSSSSSSSSS.....E...........................I.. 120 / 552EEI...EEEE......F..........F..........F..........F.......... 180 / 552F..........F..........F......................F..........F... 240 / 552.......F..........F..........F........ES.............S...... 300 / 552....F.EE..I...E..II......F..............................I... 360 / 552..........E.I..I.........I............................E.E... 420 / 552...EE.............................E......................... 480 / 552........I....................E.EFEF...I.I.IEI..FEE.FF.FFF..F 540 / 552S.....SSSSSS
Time: 03:53, Memory: 148.50Mb
There were 27 errors:
1) PHPCR\Tests\Query\QueryManagerTest::testGetQueryPHPCR\Query\InvalidQueryException: Unsupported 'xpath' language
/home/bergie/Projects/phpcr-midgard2/src/Midgard2CR/Query/QueryManager.php:24/home/bergie/Projects/phpcr-midgard2/src/Midgard2CR/Query/QueryManager.php:62/home/bergie/Projects/phpcr-midgard2/api-test/suite/tests/06_Query/QueryManagerTest.php:37...
FAILURES!Tests: 536, Assertions: 2331, Failures: 25, Errors: 27, Incomplete: 18, Skipped: 56.
Repository capabilities
● Tree access● Access by UUID● Workspaces● Versioning● Multi-value properties● Queries: SQL2, QOM
● XML import and export
● Permissions● Capability discovery● Observation● Locking &
Transactions
“Simple stuff should be easy, but complex stuff should still be possible”
In PHPCR, all content is stored in a tree of nodes
Nodes have a name, a type, and a set of properties
Nodes can also have child nodes
Including PHPCR in your application
● PHP 5.3 namespaced code● Use PSR-0 standard autoloader
Connecting to a repository: Midgard
Connecting to a repository: Jackrabbit
● Start Jackrabbit:$ java -jar jackrabbit-standalone-2.2.5.jar
● Connect to repository:
This is the only repository-specific part
Working with the tree
About Node types● Node types determine what properties and what kind of
child nodes a node can have● Some built-in types: nt:file, nt:folder, nt:resource, nt:unstructured
● Node types can be amended with “mixin” types, like mix:lastModified, mix:language
● Most repositories allow you to define your own types● Recommendation:
Start with nt:unstructured, add more strict definitions when you know your data model
Queries: SQL2
Queries: Query Object Model
Versioning: enable
Versioning: commit
Versioning: restore
Export and import
Export and import
Some projects looking at PHPCR
Some projects looking at PHPCR
