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"Gremlin is a graph traversal language. The documentation herein will provide all the information necessary to understand how to use Gremlin for graph query, analysis, and manipulation. Gremlin works over those graph databases/frameworks that implement the Blueprints property graph data model. For example: TinkerGraph, Neo4j, OrientDB, DEX, Rexster, and Sail RDF Stores. 1 Please join the Gremlin users group at http://groups.google.com/group/gremlin-users for all TinkerPop related discussions. Finally, if you are a Gremlin user, please add to the Gremlin in the Wild wiki page with your specific Gremlin uses cases."

Besides being able to query and manipulate the underlying data management system with Blueprints, a GraphML reader and writer package is provided with Blueprints for streaming XML graph representations into and out of the underlying graph framework. The GraphML package uses StAX to process a GraphML graph. This section discusses the use of the GraphML library for reading and writing XML-encoded graphs.

Hibernate Tutorial. In this hibernate tutorial, we will learn basics of hibernate, inheritance mapping, collection mapping, component mapping, HQL, HCQL, Named Query, Caching and Integration of Hibernate with other frameworks.

The CDO (Connected Data Objects) Model Repository is a distributed shared model framework for EMF models and meta models. CDO is also a model runtime environment with a focus on orthogonal aspects like model scalability, transactionality, persistence, distribution, queries and more. CDO has a 3-tier architecture supporting EMF-based client applications, featuring a central model repository server and leveraging different types of pluggable data storage back-ends like relational databases, object databases and file systems. The default client/server communication protocol is implemented with the Net4j Signalling Platform.

Apache CouchDB is a document-oriented database that can be queried and indexed in a MapReduce fashion using JavaScript. CouchDB also offers incremental replication with bi-directional conflict detection and resolution. CouchDB provides a RESTful JSON API than can be accessed from any environment that allows HTTP requests. There are myriad third-party client libraries that make this even easier from your programming language of choice. CouchDB's built in Web administration console speaks directly to the database using HTTP requests issued from your browser. CouchDB is written in Erlang, a robust functional programming language ideal for building concurrent distributed systems. Erlang allows for a flexible design that is easily scalable and readily extensible. See the introduction and the technical overview for more information.

"Morphia is a lightweight type-safe library for mapping Java objects to/from MongoDB: Easy to use, and very lightweight; reflection is used once per type and cached for good performance. Datastore and DAO access abstractions, or roll your own... Type-safe, and Fluent Query support with (runtime) validation Annotations based mapping behavior; there are no XML files. Extensions: Validation (jsr303), and SLF4J Logging"

"The Open Services for Lifecycle Collaboration (OSLC) is an open (creative commons) REST based service specification aimed at improving/simplifying Application Lifecycle Management (ALM) system integration. A number of aspects of ALM integration are covered by OSLC ranging from Requirements Management to Automation(Build/Deploy). The OSLC Change Management (CM) spec outlines a standard for creating, modifying, and querying for change requests (tasks) from OSLC based service providers. A goal of the Mylyn project is to implement a client for OSLC-CM (see [1]). Additionally, support for both OSLC Automation and OSLC SCM are part of the Mylyn restructuring proposal: http://www.eclipse.org/project-slides/mylyn-restructuring-review.html Once these plans have solidified, we can begin to fill out the roadmaps for each specification. "

"The Open Data Protocol (OData) is a Web protocol for querying and updating data that provides a way to unlock this data and free it from silos that exist in applications today. OData does this by applying and building upon Web technologies such as HTTP, Atom Publishing Protocol (AtomPub) and JSON to provide access to information from a variety of applications, services, and stores. Project Info odata4j is a new open-source toolkit for building first-class OData producers and first-class OData consumers in Java. "

Caching is the most important performance optimization technique. There are many things that can be cached in persistence, objects, data, database connections, database statements, query results, meta-data, relationships, to name a few. Caching in object persistence normally refers to the caching of objects or their data. Caching also influences object identity, that is that if you read an object, then read the same object again you should get the identical object back (same reference). JPA 1.0 does not define a shared object cache, JPA providers can support a shared object cache or not, however most do. Caching in JPA is required with-in a transaction or within an extended persistence context to preserve object identity, but JPA does not require that caching be supported across transactions or persistence contexts. JPA 2.0 defines the concept of a shared cache. The @Cacheable annotation or cacheable XML attribute can be used to enable or disable caching on a class.

"The Frisbee module was developed as a "bag" of STK paragraphs with one common factor: social. These are the main features: CE / EE pure STK-based module drop-n-run module, with a self explaining demo website detailed instructions on module install one new Magnolia theme, frisbee, simple and clean Google Map (v3) integration . single marker map . multiple marker map, 2 demo marker-retrieval modelClass Flickr Slideshow, with custom query builder (tags, full-text search, author based search..) Facebook integration . Facebook SDK . Facebook iLike button . Facebook meta tag, reading values from page properties ShareThis and AddThis integration Twitter integration (you need Twitter4J.jar) . last tweet paragraph . last n tweets paragraphs . TweetThis button . ReTweet button Frisbee is at 1.0.0 stable version, but it is not ended here, it is open for future developments and integrations. Feel free to download it and to provide comments / contributions."

The Java Content Repository (JCR) standard, which is based on the Java Specification Requests JSR170 (version 1.0) and JSR 283 (version 2.0), provides a Java-centric object-oriented storage API specifically targeted at content management scenarios. The JCR is not a content management system or a full-fledged content management system API, but rather a content repository API. A content repository provides a common API for all content-driven applications and CMS components, which require access to the content. It provides methods to read, write, and query content. The primary motivation of the JCR standard is to provide a standard and vendor-neutral programmatic interface for content repositories, allowing applications of multiple vendors to interact efficiently.

A Scala ORM and DSL for talking with Databases with minimum verbosity and maximum type safety