cloud messaging with cloud foundry

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Cloud Messaging with Cloud Foundry

Álvaro Videla - VMware

Tuesday, November 13, 12

About Me

• Developer Advocate for Cloud Foundry• Blog: http://videlalvaro.github.com/• Twitter: @old_sound

2Tuesday, November 13, 12

http://videlalvaro.github.com


http://twitter.com/old_sound


About Me

• Developer Advocate for Cloud Foundry• Blog: http://videlalvaro.github.com/• Twitter: @old_sound• I created gifsockets™






About Me

Co-authored

RabbitMQ in Action

http://bit.ly/rabbitmq




Classic Apps


Implement a Photo Gallery


Two Parts:


Pretty Simple


‘Till new requirements arrive


The Product Owner


Can we also notify the user friends when she uploads a new image?


Can we also notify the user friends when she uploads a new image?

I forgot to mention we need it for tomorrow…


The Social Media Guru


We need to give badges to users for each picture upload


We need to give badges to users for each picture upload

and post uploads to Twitter


The Sysadmin


Dumb! You’re delivering full size images!

The bandwidth bill has tripled!


Dumb! You’re delivering full size images!

The bandwidth bill has tripled!

We need this fixed for yesterday!


The Developer in the other team


I need to call your PHP stuff but from Python


I need to call your PHP stuff but from Python

And also Java starting next week


The User


I don’t want to waittill your app resizes

my image!


You


Let’s see the code evolution


%% image_controllerhandle('PUT', "/user/image", ReqData) -> image_handler:do_upload(ReqData:get_file()), ok.

Pseudo Code

Comments



Pseudo Code

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First Implementation:


%% image_controllerhandle('PUT', "/user/image", ReqData) -> {ok, Image} = image_handler:do_upload(ReqData:get_file()), resize_image(Image),ok.

Second Implementation:


%% image_controllerhandle('PUT', "/user/image", ReqData) -> {ok, Image} = image_handler:do_upload(ReqData:get_file()), resize_image(Image),notify_friends(ReqData:get_user()),ok.

Third Implementation:


%% image_controllerhandle('PUT', "/user/image", ReqData) -> {ok, Image} = image_handler:do_upload(ReqData:get_file()), resize_image(Image),notify_friends(ReqData:get_user()),add_points_to_user(ReqData:get_user()),ok.

Fourth Implementation:


%% image_controllerhandle('PUT', "/user/image", ReqData) -> {ok, Image} = image_handler:do_upload(ReqData:get_file()), resize_image(Image),notify_friends(ReqData:get_user()),add_points_to_user(ReqData:get_user()),tweet_new_image(User, Image),ok.

Final Implementation:


Can our code scale to new requirements?


What if


What if

• We need to speed up image conversion


What if

• We need to speed up image conversion• User notification has to be sent by email


What if

• We need to speed up image conversion• User notification has to be sent by email• Stop tweeting about new images


What if

• We need to speed up image conversion• User notification has to be sent by email• Stop tweeting about new images• Resize in different formats


What if

• We need to speed up image conversion• User notification has to be sent by email• Stop tweeting about new images• Resize in different formats• Swap Language / Technology


What if

• We need to speed up image conversion• User notification has to be sent by email• Stop tweeting about new images• Resize in different formats• Swap Language / Technology (No Down Time)


Can we do better?


Sure. Using messaging


DesignPublish / Subscribe Pattern


%% image_controllerhandle('PUT', "/user/image", ReqData) -> {ok, Image} = image_handler:do_upload(ReqData:get_file()),Msg = #msg{user = ReqData:get_user(), image = Image},publish_message('new_image', Msg).





%% friends notifieron('new_image', Msg) ->notify_friends(Msg.user, Msg.image).





%% points manageron('new_image', Msg) ->add_points(Msg.user, 'new_image').





%% points manageron('new_image', Msg) ->add_points(Msg.user, 'new_image').

%% resizeron('new_image', Msg) ->resize_image(Msg.image).



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Messaging


Messaging

• Share data across processes


Messaging

• Share data across processes• Processes can be part of different apps


Messaging

• Share data across processes• Processes can be part of different apps• Apps can live in different machines


Messaging

• Share data across processes• Processes can be part of different apps• Apps can live in different machines• Communication is Asynchronous


Main Concepts


Main Concepts

• Messages are sent by Producers


Main Concepts

• Messages are sent by Producers• Messages are delivered to Consumers


How can we start using messaging

today?


Enter


Why Cloud Foundry is Good™

for Messaging?


Key aspects of Cloud Foundry



71

• Supports many apps per account



72

• Supports many apps per account• Supports many services per account



73

• Supports many apps per account• Supports many services per account• Services can be shared across apps



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• Supports many apps per account• Supports many services per account• Services can be shared across apps• Supports RabbitMQ by default


Intermission:

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What is RabbitMQ


RabbitMQ


RabbitMQ

• Multi Protocol Messaging Server


RabbitMQ

• Multi Protocol Messaging Server• Open Source (MPL)


RabbitMQ

• Multi Protocol Messaging Server• Open Source (MPL)• Part of Spring Source


RabbitMQ

• Multi Protocol Messaging Server• Open Source (MPL)• Part of Spring Source• Supports AMQP, STOMP, MQTT


RabbitMQ

• Multi Protocol Messaging Server• Open Source (MPL)• Part of Spring Source• Supports AMQP, STOMP, MQTT• Has Clients for Many Platforms: Java, Ruby, node.js, PHP,

Erlang, .Net., more


TELL ME MORE


TELL ME MORE

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RabbitMQ Simulator Demo


Sample App: CloudStagram



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Frontend Appnode.js



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Frontend Appnode.js

Image Resizersnode.js



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Frontend Appnode.js

Image ResizersClojure


CODE OR IT DIDN’T HAPPEN


CODA


Messaging


Messaging

97

Scale


Messaging

98

Scale Decoupling


Messaging

99

Scale Decoupling

Polyglot


101

HeavyLifting


102

HeavyLifting

MultiApps


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HeavyLifting

MultiApps

MultiServices


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HeavyLifting

Cloud Messaging

MultiApps

MultiServices


Sign Up Today

105

https://my.cloudfoundry.com/signup




Questions?


107

Thanks!Álvaro Videla


http://github.com/videlalvaro

http://www.slideshare.net/old_sound








cloud messaging with cloud foundry

Technology

reqdata image

controller handleput

user friends

new images45tuesday

email stop

new requirements arrivetuesday

pseudo code comments

pseudo code arguments