Programming Azure Blobs with Java

I'm producing a series of blog post that highlights the work I've done with an O'Reilly media video course. I will produce several posts a week to support this course, as seen below.


The course is targeted towards developers who want to write Java applications on Linux and host those application in Azure.

These applications talk to today's top data stores, including:

  • Azure Tables
  • Azure Blobs
  • Azure Queues
  • SQL Server
  • SQL Database
  • MySQL
  • PostGres
  • DocumentDB
  • MongoDB
  • Cassandra
  • Redis

Using Java to connect to Azure Blobs

  • Reading and writing blobs is easy with the Azure SDK
  • You will need to:
    • Provision a storage account
    • Reference a container
    • Write code for the blob operations (upload, delete, download, etc)


Slide 1 - Overview

You can find the Java Storage SDK

  • You can compile your own jar from the latest sources


Slide 2 - Finding the SDK

The Github Repo with the Java SDK

  • Source code is available
  • We will compile our own Jar file


Slide 3 - Github

Git Clone

  • Downloading the Azure Java Storage SDK


Slide 4 - Downloading the SDK to local dev computer

Maven Compile

  • You will need to install and run Maven
  • Explained in course at top of this post


Slide 5 - Compiling the .java to .class

Using the jar utility to create a JAR file

  • Creating a jar file from all the class files
  • Review
    • Download sources
    • Compile sources
    • Create jar file
    • Add jar file to Eclipse project (future module)


Slide 6 - Creating jar file

Viewing Jar file

  • You can now see the jar file created
  • You may want to copy it to an easier location
    • Like c:\azure-storage-java


Slide 7 - Viewing the jar file

Moved jar file to new location

  • Don't want it too deeply buried


Slide 8 - New jar file location

Creating a new Java project in Eclipse

  • Obviously, I assume you've installed Eclipse
  • Issue a File/New/Java Project


Slide 9 - Installing Eclipse

Filling out the connection string

  • We have added
  • You need to go to the portal to fill out the rest
  • Notice the import statements for the Azure Java Storage SDK


Slide 10 - Adding

The Azure Portal

  • Notice we have:
    • Storage Account Name
    • Primary Key
  • We will need to paste this into our code


Slide 11 - Azure Portal

Storage Connection String

  • Notice on line 11 and 12 we have storage account name and primary account key pasted
  • Next we will go to try {} block on line 16


Slide 12 - Finished connection string

Connecting to storage account

  • Using CloudStorageAccount and CloudBlobClient objects
  • Lines 16 and 17


Slide 13 - Code to connect

Make sure you have the azurestorage.jar properly referenced

  • It is part of project properties
  • After adding the azurestorage.jar file to project you need to make sure it is part of the Java Build Path.


Slide 14 - Java build Path