amazon dynamodb java

Tags: style blog http color using OS strong fileAmazon Dynamodb is rapidly becoming the world's strongest game database. "Fruit Ninja" (developed by Halfbrick Studio), "Battle Camp" (developed by Pennypop) and other games take full advantage of Amazondynamodb's one-click Extensibility features to support the rapid development of the game, to provide services to millions of players worldwide. Amazondynamodb is also appreciated by a number of developers

-type primary keys: The primary key is the hash value of an attribute. Dynamodb creates an unordered hash index for the primary key atrributes. In the preceding example, the product has an ID as the primary key. This is the hash attribute (attributes) of the table ). * Hash and Range Primary keys: A primary key is a combination of two attributes. The first attribute is hash attributes. The second attribute is range attribute.

combination of "UserID" (hash) and "timestamp" (range). By keeping the hash key element constant, you can search within the range keys element to retrieve the item. This way you can use the Query API to retrieve all the items of a single UserID in a series of timestamps, and so on, which is why Dynamodb is very much like SQL in the same way that it is nosql, and it's possible to achieve both the benefits of SQL and NoSQL, and see how you design your

with the same primary key hash value share the same partition in DynamoDB, the local level two index contains only items that are stored in the same location (the same partition). Therefore, LSI can be used to query items that have the same primary key hash value, but with different range keys.It is important to note that all the GSI related to the table must be specified when the table is created. A GSI index does not require that indexed properties

From: http://www.ibm.com/developerworks/cn/java/j-javadev2-17/ Message Transfer queues are common in a range of software architectures and domains, including financial systems, healthcare, and tourism. However, message-oriented middleware (MOM)-a distributed system-dominated message transmission example-requires special installation and maintenance of a queue system. This month I introduced a cloud computing-based alternative to this type of labor-int

Amazon AWS Java SDK vulnerability Disclosure Today, we will discuss a denial of service vulnerability in Amazon AWS java SDK. This official aws sdk is often used by Java developers to integrate a series of AWS services, including integrating

Java Development 2.0: Using Amazon simpledb to implement cloud storage, part 2nd: Implementing Simple Object persistence with SIMPLEJPA It is easy to model domain objects for almost all types of applications using a relational framework such as Grails, but what about using SimpleDB? In part 2nd of Andrew Glover's introduction to SimpleDB's series, he introduced you to how to use SIMPLEJPA, rather than the

# First verify the version of Java being used is not sunjsk.Java-version# Get The latest Sun Java SDK from Oracle http://www.oracle.com/technetwork/java/javase/downloads/ Jdk-7u1-download-513651.htmlwget http://download.oracle.com/otn-pub/java/jdk/7u1-b08/jdk-7u1-linux-i586.rpm# Rename The file downloaded, just to bein