project zero php quebec

Copyright 2008 © IBM Corporation

Rob Nicholson - Project Zero

projectzero.orgZero complexity. Zero overhead. Zero obstacles.

Project Zero

Rob [email protected] or [email protected]

2Rob Nicholson - Project Zero

projectzero.org

Zero complexity. Zero overhead. Zero obstacles.

Agenda

What is Project Zero

Why should I care?

Creating Applications and REST web services - DEMO

Assembling Applications - DEMO

Deploying application

Running an existing PHP application - DEMO

Web IDE prototype DEMO


projectzero.org


Introduction

Project Zero is an IBM technology incubator project.

Building a radically simplified platform to enable the productive development and deployment of rich internet applications.

System language is JavaTMTM.Zero runs on a JavaTMTM Virtual Machine.

Supports Linux, Mac and Windows.

Application languages are PHP and Groovy.Zero contains a PHP 5 interpreter written in JavaTMTM


projectzero.org


Some Simplifications We Are Aiming For

Creating new agile web applications.Sharing assets from different languages.

Implementing REST services.

Building a rich user interface.I want to spend less time sorting out browser incompatibilities!Accessibility.

Assembling applications and services.

Deploying applications.Versioning dependencies.


projectzero.org


Top Level Architecture

Local repository

Remote repository

Remote repository

Java Virtual Machine

Zero Application

Global Context

PHP

Run

time

Gro

ovy

Run

time

Java app

App components

app

app

Events

HTT

P s

erve

r

Package Manager

Dojo

Browser

Applications built from loosely coupled components.

Enabled by:Event driven architecture.

Global Context.

Virtual Directories.

Convention based configuration.

RESTful web services and AJAX.

IDE based around Eclipse and PDT Prototype web IDE.

Command line for deployment.

The application is the web server.

REST


projectzero.org


PHP Runtime Architecture • Runtime for PHP 5 scripts

• Implemented in Java, runs on any Java 5.0+ VM

• PHP language elements represented as Java objects

• Parse script to Intermediate Representation.(IR)

• Cache and Interpret IR

• Compile ->bytecode prototype

•Extensibility via XAPI

• XAPI-C for C extensions from php.net

• XAPI-J for new Java extensions, native libraries invoked over JNI and Project Zero interface

• Extension language choice opaque to PHP script

•Java Bridge

•Debug using via DBGp using Eclipse with PDT

P8 Runtime

PHP Scripts CLI

SAPI-J

PZ Http

Parser

Interpreter

Runtime

PHP Engine

Java ExtensionsC

Extensions

Stack

Resources

Classes

Objects

Variables

Debug (D

BG

p)PZ Extensions

CacheIR

XAPI-JXAPI-C

Native code


projectzero.org


Virtualized Directories

Resources searched across application and dependencies.

Apps behave as if directories merged.

Applies to all script directories./public /app/resources, /app/scripts, /app/views etc.

First-one-wins precedence.Order based on dependency order in ivy files.

Default files searched within each directory first:{my application}/index.php{my application}/index.html{dependency1}/index.php{dependency1}/index.html


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Demo – Your first Zero Application.

See http://www.projectzero.org/wiki/bin/view/Documentation/Videos


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Implementing REST Services

Zero provides a really simple way to create REST services.

REST services fit well with test-driven development.

Convention for create/retrieve/update/delete operations (CRUD). You can also list the members in the collection.

HTTP Method URI DescriptionGET /people List members

POST /people Create member

GET /people/1 Retrieve member

PUT /people/1 Update member

DELETE /people/1 Delete member


projectzero.org


REST Services in Project Zero

Each REST service is implemented by a script (called a handler).Scripts live in the directory: <apphome>/app/resourcesServices are accessed using a standard URL convention:/resources/<collection name>[/member[/<path info>]]

HTTP requests mapped to handler methods as follows:

Resource GET PUT POST DELETE

Collection/people

list putCollection

update

deleteCollection

Member/people/1

retrieve

create

postMember delete


projectzero.org


RESTful Resources

Values of <memberID> and <pathInfo> are available for member operations:

Http Method

URI Invokes method in <apphome>/app/resources/people.php

With event data (in global context)

GET /resources/people list

create

retrieve

update

delete

POST /resources/people

/request/params/peopleId = 1 /event/pathInfo = /accounts

/request/params/peopleId' = 1

GET /resources/people/1/accounts

PUT /resources/people/1

DELETE /resources/people/1 /request/params/peopleId' = 1


projectzero.org


Demo – REST in Project Zero,



projectzero.org


All behaviour in the system is modelled as a set of events.Events are programming language agnostic.

Fired by an application using fire_event().

fire_event('my_event', array(‘data'=>'foobar'));

Event handlers are defined in the Zero configuration file:/config/handlers += {

"events" : my_event,

"handler" : test.php

}

Request Processing events requestBegin, secure, GET, PUT, POST, DELETE, log, requestEnd

Application specific eventsFired by your application.

Sharing Assets - Events


projectzero.org


Sharing Assets - Rendering

Zero provides renderers for generating output.Renderers are programming language agnostic.

View renderer serves up script output:zput('/request/view', 'hello.php');

render_view();

XML, JSON and ATOM for well known data types:zput("/request/view", "JSON");

zput("/request/json/output", $obj);

render_view();

Error renderer serves up standard error pages.


projectzero.org


Global Context

Event handlers are statelessinteresting applications contain state

GC provides access/management of application state.It is NOT persistent. Persistent data goes into the database.

Conceptually a map of data.

Divided into a set of zones with different data lifecycles.

Understands and provides intelligent access to certain data types.

Externalizes state from the application logic.Enables clustering and scaling to be added transparently.


projectzero.org


Global Content Zones

Divided into zones representing different data lifecycles

Zone Scope/Visibility LifecycleConfig All requests all users. Loaded from config

files.Application All requests for all users of the

applicationLife of the application, but not “persistent”

User All request for a particular user (HTTP Session equivalent)

For first access until user times out

Request All handlers along the path of a single request

For the duration of a single request

Event All handlers for a single event The duration of a single event


projectzero.org


Accessing the Global Context

Action PHP Example Java Example

Get HTTP Request URI zget (/request/uri) GlobalContext.get("/request/uri"

Get value of user-agent request header

zget(/request/headers/in/User-Agent)

GlobalContext.get("/request/headers/in/User-Agent")

Get list of request parameters list_keys('/request/params', false)

GlobalContext.get("/request/params")

Get value of request parameter parmName

zget(/request/params/ParmName)

((String []) GlobalContext.get("/request/params/parmName"))[0]

Set status zput (/request/status,200) request.status = 200

Of course PHP (super)globals are also available.


projectzero.org


Meerkat Demo


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Java Bridge


projectzero.org


Dojo is the preferred Ajax/JavaScript toolkit for Zero.

Open source toolkit to simplify rich web applications.http://www.dojotoolkit.orgv1.0 released on 5th November 2007.

Addresses key problem with browser compatibility.

Dijit library provides rich set of user interface widgets.Accessibility built inInternationalisedTheme 100% customisable

DojoX adds experimental and specialised extensions.Wire, XML, cryptography, network

Building A Rich User Interface

http://www.dojotoolkit.org/


projectzero.org


Input controls – buttons, combo box, sliders, text areas.

Layout – accordion, split/stack containers, tabs.

Command – button, menu, toolbar.

User assistance and feedback – progress bar, tooltip, dialog.

Advanced editing and display – editor, tree, colour palette


projectzero.org


Dojo Core Widget Set (Dijit) Accessibility

ARIA specification implemented in all widgets.Fully keyboard accessible in Firefox and Internet Explorer.

Screen reader accessible in Firefox.

Works in operating system high-contrast mode (system colours).

Works with images off (regular <img> tags).Currently only auto-detected in Firefox.

Must be in high contrast mode for image-off support in Internet Explorer.

More information available from: http://www.w3.org/WAI/intro/aria.


projectzero.org


Deploying Applications

Web server

Application Code

Language runtimes

JVM

The application is the server

Hundreds of applications per box.

Applications started on demand – inetd style

Applications isolation

Quality of service and management built in.


projectzero.org


Deploying on the command linePackage the app from eclipse:

File->export.

Download Zero command line from projectzero.org, unzip on target machine.

Unzip application.

Zero run :

C:\z\officemonitor-all>zero runResolving C:\z\officemonitor-all\config\ivy.xmlzeroinit apphome=C:\z\officemonitor-allzeromake zerohome=C:\zero\zero-1.0.6169.M2\ apphome=C:\z\officemonitor-all appname=officemonitor2007-10-29 20:58:20 zero.core.cfadapter.ZeroServer::writePid Thread-10

INFO [ PID file written to C:\z\officemonitor-all\logs\zero.pid]2007-10-29 20:58:20 zero.core.cfadapter.ZeroServer::run Thread-10

INFO [ C:/z/officemonitor-all running on port 8080 ]



projectzero.org


Versioning Dependencies

Modules are the building blocks of an application.

A module is simply a collection of files packaged together.Includes a module name, version and author details.

An application declares the modules it depends on.

Versioning ensures applications don’t break!Specific versions can be set (v1.1.34).

Versions upwards from a particular release (v1.0+).

Ranges of acceptable versions (v1.0 – v1.5).

Remote catalog servers at PZ.net and maven2


projectzero.org


Visual assembly of feeds and flows - Assemble

http://www.projectzero.org/wiki/bin/view/Documentation/Videos


projectzero.org


PHP Application Demo


projectzero.org


Web tool prototype


projectzero.org


Installing Project Zero

Get a Java 1.5 JDK.

Get the PHP Development Tools (PDT) Eclipse all-in-one.

Install Zero for PDT using the eclipse update manager.From the project zero download site.

Links and walkthrough on www.projectzero.org.

Community, blogs, questions, answers, opinions and thoughts:http://www.projectzero.org/wiki/bin/view/Community/WebHome

http://www.projectzero.org/


projectzero.org


Features of Zero we have not covered today

File Serving

Error Handling

Logging/Tracing/Debugging

Client Programming with Dojo

Security

Nested resources


projectzero.org


PHP Runtime Architecture

P8 Runtime

PHP Scripts CLI

SAPI-J

PZ Http

Parser

Interpreter

Runtime

PHP Engine

Java ExtensionsC

Extensions

Stack

Resources

Classes

Objects

Variables

Debug (D

BG

p)

PZ Extensions

CacheIR

XAPI-JXAPI-C

Native code


projectzero.org


XAPI-J example


projectzero.org


What we learned

PHP is reference implementation based language.

PHP has no spec.

Documentation is good for users.But not precise enough for language implementers.

Test suite is the real spec.

Many surprises.


projectzero.org


Quantum mechanics in PHP

In this example we see how observing a value can change how it behaves.

Counter-intuitive to non physicists.But similar in some ways to quantum physics.


projectzero.org


Quantum Mechanics in PHP (simple case)1. $a=array(“foo”);

0PHP String

“foo”$a

0PHP String

“foo”$a

3. $b=$a;

0PHP String

“foo”$b

0PHP String

“foo”

0PHP String

“bar”

4. $b[0]=“bar”;

$a

$b

Pictures show PHP programmer’s view. (Not internals).

Observe that $b and $a are independent.

2. // do nothing


projectzero.org


Quantum Mechanics in PHP (observing changes behaviour)1. $a=array(“foo”);

0PHP String

“foo”$a

0PHP String

“foo”$a

3. $b=$a;

0$b

0PHP String

“bar”

0

4. $b[0]=“bar”;

$a

$b

2. $c=&$a[0];

0PHP String

“foo”$a

$c

All we did was observe the value of $a[0]

Now $a and $b are not independent.


projectzero.org


PROJECT ZERO COMMUNITYWWW.PROJECTZERO.ORG


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projectzero.org


Summary

Project Zero is incubating technologies to build web applicationsSimply!

Project zero contains a PHP runtime which runs on a JVM.

Project Zero enables same process interoperability between PHP, Java and Groovy.


projectzero.org


Questions?


projectzero.org


Thank You!


projectzero.org


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Other company, product, or service names may be trademarks or service marks of others.

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