1.
SOA with Symfony2
Alessandro Nadalin - Montreal, February 2014

2.
This talk is for those...

3.
Stuck with the legacy

4.
dealing with CRONs

5.
in the need of a solid foundation

6.
rely on web services

7.
need a pluggable software architecture

8.
who love @fabpot

9.
SOA

10.
1. SO WHAT?
(A)

11.
A software design based on discrete software
components, "services", that collectively
provide the functionalities of the larger
software application

12.
You typically start with the infamous PHP
app, hopefully built with Symfony2
which does everything on its own

13.
Then you realize that to provide
a chat system to your users
PHP might not be the best...

14.
And soon you also decide,
to improve performances,
that your frontend should have its own
in-memory persistence, to be faster
and you put it into another service

15.
Then, as always...

16.
SCALE.

17.
And eventually, your lead architect
will come up and tell you
that your Java-based chat
sucks and should be
replaced with...

18.
NODEJS

19.
In human-understandable words, SOA is a software design which
embraces splitting a monolithic, totalitarian software
architecture into smaller pieces, thus making them independent,
loosely coupled and more maintainable

20.
Ok, but in the real world?

21.
2. Your (Symfony2) app
is just a piece of
the puzzle

22.
How does communication (usually) happen?

23.
WEBSERVICES

24.
Services can request data to other services,
usually through WSs

25.
POX

26.
https://github.com/kriswallsmith/buzz
https://github.com/fabpot/Goutte
https://github.com/guzzle/guzzle

27.
SOAP

28.
PHP and SOAP in 2014
http://www.whitewashing.de/2014/01/31/soap_and_php_in_2014.html

29.
HTTP

30.
REST

31.
FosREST
https://github.com/FriendsOfSymfony/FOSRestBundle

32.
# app/config/routing.yml
users:
type:
rest
resource: MyBundleUsersController

33.
GET /users

34.
class UsersController
{
public function getUsersAction()
{
return $this->get(‘storage’)->getUsers();
}
}

35.
class UsersController
{
public function getUsersAction()
{
return $this->get(‘storage’)->getUsers();
}
}

36.
class UsersController
{
public function getUsersAction()
{
return $this->get(‘storage’)->getUsers();
}
}

37.
View?

38.
SERIALIZE ALL
THE THINGS!

39.
JMSSerializer
Bundle: https://github.com/schmittjoh/JMSSerializerBundle

40.
/**
* @ExclusionPolicy("all")
*/
class Customer implements UserInterface, EquatableInterface
{
/**
* @Expose
* @SerializedName("addresses")
* @Groups({"Customer:depth:1"})
*/
protected $addresses;
/**
* @Expose
* @Groups({
* "Customer:list",
* "Customer:detail",
* })
*/
private $email;

41.
/**
* @ExclusionPolicy("all")
*/
class Customer implements UserInterface, EquatableInterface
{
/**
* @Expose
* @SerializedName("addresses")
* @Groups({"Customer:depth:1"})
*/
protected $addresses;
/**
* @Expose
* @Groups({
* "Customer:list",
* "Customer:detail",
* })
*/
private $email;

42.
/**
* @ExclusionPolicy("all")
*/
class Customer implements UserInterface, EquatableInterface
{
/**
* @Expose
* @SerializedName("addresses")
* @Groups({"Customer:depth:1"})
*/
protected $addresses;
/**
* @Expose
* @Groups({
* "Customer:list",
* "Customer:detail",
* })
*/
private $email;

43.
/**
* @ExclusionPolicy("all")
*/
class Customer implements UserInterface, EquatableInterface
{
/**
* @Expose
* @SerializedName("addresses")
* @Groups({"Customer:depth:1"})
*/
protected $addresses;
/**
* @Expose
* @Groups({
* "Customer:list",
* "Customer:detail",
* })
*/
private $email;

44.
/**
* @ExclusionPolicy("all")
*/
class Customer implements UserInterface, EquatableInterface
{
/**
* @Expose
* @SerializedName("addresses")
* @Groups({"Customer:depth:1"})
*/
protected $addresses;
/**
* @Expose
* @Groups({
* "Customer:list",
* "Customer:detail",
* })
*/
private $email;

45.
/**
* @ExclusionPolicy("all")
*/
class Customer implements UserInterface, EquatableInterface
{
/**
* @Expose
* @SerializedName("addresses")
* @Groups({"Customer:depth:1"})
*/
protected $addresses;
/**
* @Expose
* @Groups({
* "Customer:list",
* "Customer:detail",
* })
*/
private $email;

46.
EVENTS

47.
services notify the architecture that an event has happened

48.
asynchronous messaging queues

49.
RabbitMQ
https://github.com/videlalvaro/rabbitmqbundle

50.
old_sound_rabbit_mq:
connections:
default:
host:
'localhost'
port:
5672
user:
'guest'
password: 'guest'
vhost:
'/'
lazy:
false
producers:
user_registration:
connection:
default
exchange_options: {name: 'userreg', type: direct}
consumers:
user_registration:
connection:
default
exchange_options: {name: 'userreg', type: direct}
queue_options:
{name: 'userreg'}
callback:
mailer

51.
old_sound_rabbit_mq:
connections:
default:
host:
'localhost'
port:
5672
user:
'guest'
password: 'guest'
vhost:
'/'
lazy:
false
producers:
user_registration:
connection:
default
exchange_options: {name: 'userreg', type: direct}
consumers:
user_registration:
connection:
default
exchange_options: {name: 'userreg', type: direct}
queue_options:
{name: 'userreg'}
callback:
mailer

52.
old_sound_rabbit_mq:
connections:
default:
host:
'localhost'
port:
5672
user:
'guest'
password: 'guest'
vhost:
'/'
lazy:
false
producers:
user_registration:
connection:
default
exchange_options: {name: 'userreg', type: direct}
consumers:
user_registration:
connection:
default
exchange_options: {name: 'userreg', type: direct}
queue_options:
{name: 'userreg'}
callback:
mailer

53.
old_sound_rabbit_mq:
connections:
default:
host:
'localhost'
port:
5672
user:
'guest'
password: 'guest'
vhost:
'/'
lazy:
false
producers:
user_registration:
connection:
default
exchange_options: {name: 'userreg', type: direct}
consumers:
user_registration:
connection:
default
exchange_options: {name: 'userreg', type: direct}
queue_options:
{name: 'userreg'}
callback:
mailer

54.
old_sound_rabbit_mq:
connections:
default:
host:
'localhost'
port:
5672
user:
'guest'
password: 'guest'
vhost:
'/'
lazy:
false
producers:
user_registration:
connection:
default
exchange_options: {name: 'userreg', type: direct}
consumers:
user_registration:
connection:
default
exchange_options: {name: 'userreg', type: direct}
queue_options:
{name: 'userreg'}
callback:
mailer

55.
mailer:
class: "MyMailer"
arguments: [..., ...]

56.
$this->get('old_sound_rabbit_mq.user_registration_producer')
->publish(serialize($msg));

57.
php app/console rabbitmq:consumer user_registration

58.
old_sound_rabbit_mq:
connections:
default:
host:
'localhost'
port:
5672
user:
'guest'
password: 'guest'
vhost:
'/'
lazy:
false
producers:
user_registration:
connection:
default
exchange_options: {name: 'userreg', type: direct}
consumers:
user_registration:
connection:
default
exchange_options: {name: 'userreg', type: direct}
queue_options:
{name: 'userreg'}
callback:
mailer

59.
class Mailer
{
…
public function execute(AMQPMessage $message)
{
// do stuff
}
}

60.
class Mailer
{
…
public function execute(AMQPMessage $message)
{
// do stuff
}
}

61.
2. Free data

62.
CONSIDER ELIMINATING FK CONSTRAINTS

63.
A service might need to handle data with
another DBMS, so FKs are virtually impossible

64.
ABSTRACT THE DATA

65.
You might think in "rows" but the architecture
thinks in "resources"

66.
$this->get(‘doctrine’)
->getRepository(‘My:Entity’)
->findActiveOnes()

67.
$this->get(‘doctrine’)
->getRepository(‘My:Entity’)
->findActiveOnes()

68.
$this->get(‘storage’)
->getRepository(‘My:Entity’)
->findActiveOnes()

69.
class RedisStorage
{
public function getRepository($name)
{
$this->hash = $name;
return $this;
}
public function findActiveOnes()
{
$results = $this->redis->hget($this->hash);
return array_filter($results, function($r){
return $r[‘active’] == true;
});
}
}

70.
class RedisStorage
{
public function getRepository($name)
{
$this->hash = $name;
return $this;
}
public function findActiveOnes()
{
$results = $this->redis->hget($this->hash);
return array_filter($results, function($r){
return $r[‘active’] == true;
});
}
}

71.
class RedisStorage
{
public function getRepository($name)
{
$this->hash = $name;
return $this;
}
public function findActiveOnes()
{
$results = $this->redis->hget($this->hash);
return array_filter($results, function($r){
return $r[‘active’] == true;
});
}
}

72.
class RedisStorage
{
public function getRepository($name)
{
$this->hash = $name;
return $this;
}
public function findActiveOnes()
{
$results = $this->redis->hget($this->hash);
return array_filter($results, function($r){
return $r[‘active’] == true;
});
}
}

73.
class RedisStorage
{
public function getRepository($name)
{
$this->hash = $name;
return $this;
}
public function findActiveOnes()
{
$results = $this->redis->hget($this->hash);
return array_filter($results, function($r){
return $r[‘active’] == true;
});
}
}

74.
class RedisStorage
{
public function getRepository($name)
{
$this->hash = $name;
return $this;
}
public function findActiveOnes()
{
$results = $this->redis->hget($this->hash);
return array_filter($results, function($r){
return $r[‘active’] == true;
});
}
}

75.
REPOSITORIES NEED
INTERFACES

76.
ENTITIES NEED
INTERFACES

77.
forget managers, you
need collections

78.
implements StockStorageInterface

79.
use StockStorageInterface as Storage;
class RedisStorage implements Storage
{
...

80.
use StockStorageInterface as Storage;
class RedisStorage implements Storage
{
...

81.
use StockStorageInterface as Storage;
class StockStorage implements Storage
{
...

82.
collections as a service

83.
stock:
class: “MyNamespaceStockStorage”
arguments:
…
…
$this->get(‘stock’)->findActiveOnes();

84.
stock:
class: “MyNamespaceStockStorage”
arguments:
…
…
$this->get(‘stock’)->findActiveOnes();

85.
stock:
class: “MyNamespaceStockStorage”
arguments:
…
…
$this->get(‘stock’)->findActiveOnes();

86.
No more FKs and
the ability of
JOINing to retrieve
some related data

87.
But you choose
what perfectly fits
each service:
your transactions
over a RDBMS and
your community
over a graph DB

88.
So complicated!

89.
Have fun returning
serialized collections
over HTTPS in
~50ms with Doctrine!

90.
3. Standardize

91.
EVERY DEVELOPER NEEDS
THE ENTIRE ARCHITECTURE ON HIS MACHINE

92.
The architecture needs
to be installed in
~1 hour

93.
Setting up VMs
is an hassle and
they are so slow!

94.
go #vagrant

95.
But Vagrant is
still suboptimal:
provisioning and
system resources
are still a pain!

96.
4. Identity

97.
Centralized authentication = identity service

98.
OAuth

99.
OpenID

100.
JWS

101.
JSON WEB SIGNATURE

102.
JSON WEB TOKEN

103.
JSON WEB SIGNATURE

104.
JAVASCRIPT OBJECT
SIGNING & ENCRYPTION

105.
JOSE
http://www.thread-safe.com/2012/03/json-object-signing-and-encryption-jose.html

106.
1. The user enters the
credentials once in your
frontend
2. The JS app will forward them
to your Auth webservice
JS APP
AUTH
SERVICE
3. The Auth webservice will
then generate the encrypted
JWS and set a cookie with
its value
JS APP
4. The JS app can now just
execute calls using
that cookie

107.
1. The user enters the credentials
once in your frontend
JS APP

108.
2. The JS app will forward them
to your Auth webservice
JS APP
AUTH
SERVICE

109.
AUTH
SERVICE
3. The Auth webservice will then generate the
encrypted JWS and set a cookie with its value

110.
AUTH
SERVICE
JS APP
4. The JS app can now just execute
calls using that cookie

111.
1. The user enters the
credentials once in your
frontend
2. The JS app will forward them
to your Auth webservice
JS APP
AUTH
SERVICE
3. The Auth webservice will
then generate the encrypted
JWS and set a cookie with
its value
JS APP
4. The JS app can now just
execute calls using
that cookie

112.
setcookie($name, $jws,$ttl, $path, $domain, true);

113.
setcookie($name, $jws,$ttl, $path, $domain, true);
HTTPS

114.
JWS in PHP?

115.
namshi/jose

116.
use NamshiJOSEJWS;
$jws = new JWS('RS256');
$jws->setPayload(array(
'uid' => $user->getid(),
));
$privateKey = openssl_get_privatekey("file://path/to/private.
key");
$jws->sign($privateKey);
setcookie('identity', $jws->getTokenString());
use NamshiJOSEJWS;
$jws
= JWS::load($_COOKIE['identity']);
$public_key = openssl_pkey_get_public("/path/to/public.key");
if ($jws->verify($public_key)) {
echo "EUREKA!;
}

117.
use NamshiJOSEJWS;
$jws = new JWS('RS256');
$jws->setPayload(array(
'uid' => $user->getid(),
));
$privateKey = openssl_get_privatekey("file://path/to/private.
key");
$jws->sign($privateKey);
setcookie('identity', $jws->getTokenString());
use NamshiJOSEJWS;
$jws
= JWS::load($_COOKIE['identity']);
$public_key = openssl_pkey_get_public("/path/to/public.key");
if ($jws->verify($public_key)) {
echo "EUREKA!;
}

118.
use NamshiJOSEJWS;
$jws = new JWS('RS256');
$jws->setPayload(array(
'uid' => $user->getid(),
));
$privateKey = openssl_get_privatekey("file://path/to/private.
key");
$jws->sign($privateKey);
setcookie('identity', $jws->getTokenString());
use NamshiJOSEJWS;
$jws
= JWS::load($_COOKIE['identity']);
$public_key = openssl_pkey_get_public("/path/to/public.key");
if ($jws->verify($public_key)) {
echo "EUREKA!;
}

119.
use NamshiJOSEJWS;
$jws = new JWS('RS256');
$jws->setPayload(array(
'uid' => $user->getid(),
));
$privateKey = openssl_get_privatekey("file://path/to/private.
key");
$jws->sign($privateKey);
setcookie('identity', $jws->getTokenString(), ...);
use NamshiJOSEJWS;
$jws
= JWS::load($_COOKIE['identity']);
$public_key = openssl_pkey_get_public("/path/to/public.key");
if ($jws->verify($public_key)) {
echo "EUREKA!;
}

120.
use NamshiJOSEJWS;
$jws = new JWS('RS256');
$jws->setPayload(array(
'uid' => $user->getid(),
));
$privateKey = openssl_get_privatekey("file://path/to/private.
key");
$jws->sign($privateKey);
setcookie('identity', $jws->getTokenString());
use NamshiJOSEJWS;
$jws
= JWS::load($_COOKIE['identity']);
$public_key = openssl_pkey_get_public("/path/to/public.key");
if ($jws->verify($public_key)) {
echo "EUREKA!;
}

121.
use NamshiJOSEJWS;
$jws = new JWS('RS256');
$jws->setPayload(array(
'uid' => $user->getid(),
));
$privateKey = openssl_get_privatekey("file://path/to/private.
key");
$jws->sign($privateKey);
setcookie('identity', $jws->getTokenString());
use NamshiJOSEJWS;
$jws
= JWS::load($_COOKIE['identity']);
$public_key = openssl_pkey_get_public("/path/to/public.key");
if ($jws->verify($public_key)) {
echo "EUREKA!;
}

122.
...what about Symfony2?

123.
use SymfonyComponentSecurity...AuthenticationProviderInterface;
class JwsProvider implements AuthenticationProviderInterface
{
...
public function authenticate(TokenInterface $token)
{
$key = openssl_pkey_get_public($this->publicKeyPath);
$jws = $token->getJws();
if ($key && $jws->isValid($key)) {
$token->setUser(User::fromArray($jws->getPayload()));
return $token;
}
throw new AuthenticationException('authentication failed.');
}
...
}

124.
use SymfonyComponentSecurity...AuthenticationProviderInterface;
class JwsProvider implements AuthenticationProviderInterface
{
...
public function authenticate(TokenInterface $token)
{
$key = openssl_pkey_get_public($this->publicKeyPath);
$jws = $token->getJws();
if ($key && $jws->isValid($key)) {
$token->setUser(User::fromArray($jws->getPayload()));
return $token;
}
throw new AuthenticationException('authentication failed.');
}
...
}

125.
use SymfonyComponentSecurity...AuthenticationProviderInterface;
class JwsProvider implements AuthenticationProviderInterface
{
...
public function authenticate(TokenInterface $token)
{
$key = openssl_pkey_get_public($this->publicKeyPath);
$jws = $token->getJws();
if ($key && $jws->isValid($key)) {
$token->setUser(User::fromArray($jws->getPayload()));
return $token;
}
throw new AuthenticationException('authentication failed.');
}
...
}

126.
use SymfonyComponentSecurity...AuthenticationProviderInterface;
class JwsProvider implements AuthenticationProviderInterface
{
...
public function authenticate(TokenInterface $token)
{
$key = openssl_pkey_get_public($this->publicKeyPath);
$jws = $token->getJws();
if ($key && $jws->isValid($key)) {
$token->setUser(User::fromArray($jws->getPayload()));
return $token;
}
throw new AuthenticationException('authentication failed.');
}
...
}

127.
use SymfonyComponentSecurity...AuthenticationProviderInterface;
class JwsProvider implements AuthenticationProviderInterface
{
...
public function authenticate(TokenInterface $token)
{
$key = openssl_pkey_get_public($this->publicKeyPath);
$jws = $token->getJws();
if ($key && $jws->isValid($key)) {
$token->setUser(User::fromArray($jws->getPayload()));
return $token;
}
throw new AuthenticationException('authentication failed.');
}
...
}

128.
I can't simply
use the HTTP
basic authentication,
it was so
convenient!

129.
...and flawed.
Modern apps,
modern tech.

130.
4. Embrace
messaging

131.
Don't wait, notify instead

132.
Different services can intercept an even, separately

133.
If one is down, the others keep working

134.
Who cares about milliseconds for notifications?

135.
The human body is the bottleneck

136.
Email?

137.
SMS?

138.
Be reliable

139.
“Daemons are great”

140.
“Daemons are great”
- No PHP developer ever

141.
SUPERVISOR
http://supervisord.org/

142.
SUPERVISE
http://cr.yp.to/daemontools/supervise.html

143.
use python ;-)

144.
It doesn’t matter...

145.
‫اﻟﺤﺮوف اﻟﻌﺮﺑﯿﺔ ‪if you talk‬‬

146.
Rabbit makes everyone talk the same language

147.
chat
sync daemons
Batch processing
frontend
ERP
agony
transcoding
telcom

148.
But I
Symfony2

149.
Tech monogamy
is so ‘90
“given a hammer,
everything
becomes a nail”

150.
One size doesn’t fit all

151.
“But look at Google,
they basically use
python for everything”

152.
“...and C”

153.
“...and C++”

154.
“...and Java”

155.
“...and JavaScript”

156.
“...and Go”

157.
But hey, you say...

158.
they really dislike supporting
multiple platforms

159.
“...and Dart”

160.
But hey, you say...

161.
they really are not into
supporting the secondary platforms

162.
“...and AngularJS”

163.
5. Not always
sunday

164.
Monitor in real time

165.
Native support for Symfony2

166.
Logs are first-class citizens

167.
https://github.com/Seldaek/monolog

168.
Sharp, as much
as possible

169.
I LIED A LOOOOOT

170.
Symfony isn’t even
the main point of this
SOA talk

171.
You can build SOAs
with anything

172.
...or can you?

173.
http://odino.org/why-we-choose-symfony2-over-any-other-php-framework/

174.
By being decoupled and HTTP-centric
Symfony2 has turned into an
ideal application framework
that can take (part of)
the stage in a SOA

175.
Full-stack is dead

176.
PHP developers are dead

177.
LONG LIVE API ENGINEERS!

178.
All in all...

179.
SOA is complex

180.
like Symfony2

181.
A puzzle with more pieces

182.
like Symfony2

183.
More things to keep in mind

184.
like Symfony2

185.
COMPLEX
IS NOT
COMPLICATED

186.
Loose coupling

187.
every service is independent, not forced to the
constraints of a monolithic block

188.
you have the freedom of changing or replacing services
without the hassle of touching an entire system

189.
State-of-the-art defense against outages

190.
Fault tolerance

191.
if one of the services has an outage, the rest
of the architecture still works

192.
if a service, listening for messages, is down,
the publisher doesn't get stuck

193.
Cleaner architecture

194.
SoC happens at architectural, not application, level and you can perform large-scale
refactorings without the fear of destroying the entire system

195.
...yawn...

196.
Alessandro Nadalin

197.
Alessandro Nadalin
@_odino_

198.
Alessandro Nadalin
@_odino_
Namshi | Rocket Internet

199.
Alessandro Nadalin
@_odino_
Namshi | Rocket Internet
VP Technology

200.
Alessandro Nadalin
@_odino_
Namshi | Rocket Internet
VP Technology
odino.org

201.
Thanks!
Alessandro Nadalin
@_odino_
Namshi | Rocket Internet
VP Technology
odino.org

202.
By the way

203.
Wanna join?

204.
We are looking for talented nerds!

205.
We are looking for talented nerds!
frontend engineer

206.
We are looking for talented nerds!
frontend engineer
data engineer

207.
We are looking for talented nerds!
lead frontend engineer
data engineer

208.
Thanks!
Alessandro Nadalin
@_odino_
Namshi | Rocket Internet
VP Technology
odino.org

209.
Image credits
http://www.flickr.com/photos/randystiefer/6998037429/sizes/h/in/photostream/
http://www.flickr.com/photos/55432818@N02/5500963965/
http://www.flickr.com/photos/pamhule/4503305775/
http://www.flickr.com/photos/wili/1427890704/
http://www.flickr.com/photos/nickpiggott/5212959770/sizes/l/in/photostream/
http://www.flickr.com/photos/nomad9491/2549965427/sizes/l/in/photostream/
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