Amazon shafaq v6-10-12-11

Amazon SDK on Android Devices
CTIA ENTERPRISE AND APPLICATIONS 2011

Shafaq Abdullah
Principal/Architect, Software
October 12, 2011

Twitter: @shafaq110
Shafaq.abdullah@zenprise.com
© 2011 Zenprise, Inc. All rights reserved. 0

Amazon Web Services

• Storage

• Database

• Messaging

• Compute

• Monitoring


Amazon Web Services

• Amazon S3

• Amazon Simple Db

• Amazon SQS

• Amazon SNS


REST

• Resource
• Resource’s URI
• Resource’s Representation


CRUD

Operation Description Http Method
Read Just read, without modifying GET
Delete Delete resource DELETE
Create Create a new resource PUT /POST
Update Modify resource's value POST/PUT


AWS Demo


S3 Storage Schema

• Similar to files and folders
• No bucket(s) inside bucket


Amazon S3 Bucket

Amazon S3

Your S3 Bucket

Object 1

Object 2 Object 3


Creating a Bucket in S3

AWSAuthConnection conn = new AWSAuthConnection
(accessKeyId, secretAccessKey, false, Utils.DEFAULT_HOST,
Utils.INSECURE_PORT, CallingFormat.getPathCallingFormat());
Response createResponse = conn.createBucket(“TestBucket”, null, null); //PUT


Amazon Console


Amazon S3 is Restful

• Stateless

• Client-Server

• Layered Architecture

• Uniform Interface

• Cacheable

• Coding on Demand (optional)


Security Principles

• Build Security in every layer

• Group based rule for controlling access in every layer

• Limit access to specific IP ranges

• Encrypt stored data

• Encrypt data in-transit

• Rotate AWS credentials, Multifactor authentication


Amazon Account Setup

• Access Credentials: Your Access Keys, X.509 Certificates,
and Key Pairs
• Sign-In Credentials: Your E-mail Address, Password, and
AWS Multi-Factor Authentication Device
• Account Identifiers: Your AWS Account ID and Canonical
User ID


AWS Account Identifiers

• AWS uses two types of account identifiers
• The canonical user ID can be used exclusively for Amazon S3
resources such as buckets or files
• The AWS account ID can be used for all AWS service
resources except Amazon S3


Amazon S3 Client

• Public List<Bucket> listBuckets
• Public Bucket createBucket(String bucketName)
• Public ObjectMetadata getObjectMetadata(String
bucketName, String key)
• Public S3Object getObject(String bucketName, String key)
• Public PutObjectResult putObject(String bucketName, String
key, File file)


Amazon Simple DB Description

• Hierarchy for DataStorage in SImpleDB

- Domains

- Items

- Attributes


Simple DB Storage Model


Data Creation in SimpleDB

• Region Selection
US East (Northern Virginia), US West (Northern California),
EU (Ireland)
Asia Pacific (Singapore), Asia Pacific (Tokyo) Regions

• AmazonSimpleDBAsyncClient: has followoing methods for
Data Creation
CreateDomain
DeleteDomain
ListDomains
DomainMetadata


Retrieving Data in Simple DB

• GetAttributes to retrieve a specific item
• Select to query your data set for items that meet specified
criteria


API Highlight of Amazon Simple DB

• CreateDomain — Create a domain that contains your dataset.

• DeleteDomain — Delete a domain.

• ListDomains — List all domains.

• DomainMetadata — Retrieve information about creation time for the domain, storage
information both as counts of item names and attributes, as well as total size in bytes.

• PutAttributes — Add or update an item and its attributes, or add attribute-value pairs to
items that exist already. Items are automatically indexed as they are received.

• BatchPutAttributes — For greater overall throughput of bulk writes, perform up to 25
PutAttribute operations in a single call.

• DeleteAttributes — Delete an item, an attribute, or an attribute value.

• BatchDeleteAttributes — For greater overall throughput of bulk deletes, perform up to 25
DeleteAttributes operations in a single call.

• GetAttributes — Retrieve an item and all or a subset of its attributes and values.

• Select — Query the data set in the familiar Example: select * from mydomain where
every(keyword) = ‘Car’. Order results using the SORT operator, and count items that meet
the condition(s) specified by the predicate(s) in a query using the Count operator.


SimpleDB Use Case

S3ObjectID Date Last Subject Comments Rating Tags
Created Modified

0001 10-10-2011 10-10-2011 • Science • Good A • Information
• Animal • Fair • Nature
History


Simple DB: Read Operation

Eventually Consistent Read Consistent Read
Stale reads possible No stale reads
Lowest read latency Higher read latency
Highest read throughput Lower read throughput

http://www.allthingsdistributed.com/2010/02/strong_consistency_simpledb.html


Amazon SQS

• Used to pass messages asynchronously between two
distributed applications


Amazon SQS

http://sqs-public-
images.s3.amazonaws.com/Building_Scalabale_EC2_applications_with_SQS2.pdf


Amazon SQS

• A single queue can be shared with multiple server
• A server can “lock” the message under process with a
timeout, if its not able to delelte it within the timeout then the
lock is relinquished


Basic SQS API

• CreateQueue: Create queues for use with your AWS account
• ListQueues: List your existing queues
• DeleteQueue: Delete one of your queues
• SendMessage: Add any data entries to a specified queue
• ReceiveMessage: Return one or more messages from a
specified queue


Life Cycle of SQS API

• System uses SendMessage to add a new message to it SQS
• A different system that processes messages needs more
messages to process, so it calls ReceiveMessage
• Once a message has been returned by ReceiveMessage, it will
not be returned by any other ReceiveMessage until the
visibility timeout has passed
• If the system that processes messages successfully finishes
working with this message, it calls DeleteMessage, which
removes the message from the queue so no one else will ever
process it


Amazon SNS

• A highly scalable, flexible, and cost-effective capability to
publish messages from an application and immediately
deliver them to subscribers or other application
• SNS push and SQS poll mechanism


NetFlix and AWS

http://qcontokyo.com/pdf/adriancockroft.pdf

Amazon shafaq v6-10-12-11

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