Frank Celler, Author at ArangoDB - Page 7 of 19

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Building Hypermedia APIs – Links and Forms in JSON

00API, Foxx, GeneralTags:

When we create websites we don’t just create single pages that have no connection to other Web pages. From the beginning, hyperlinks were part of the core concept of the World Wide Web and for that reason HTML. Links are so essential to the Web that they are even used to rank the popularity of the Web pages on search engines. And who hasn’t gone on a journey through Wikipedia clicking link after link? Even though we all know and appreciate the importance of links on Websites, we rarely use links in our Web APIs. More info

Running ArangoDB is as simple as …

07GeneralTags:

I’ve created an automated build repository on docker, so that you can easily start a docker container with the latest stable release. If you miss anything in the container, please let me know. Thanks to frodenas, hipertracker, joaodubas, webwurst who also created dockerfiles.

ArangoDB

A distributed open-source database with a flexible data model for documents, graphs, and key-values. Build high performance applications using a convenient sql-like query language or JavaScript extensions.

Start a ArangoDB instance

In order to start an ArangoDB instance run

By default ArangoDB listen on port 8529 for request and the image includes EXPOST 8529. If you link an application container, it is automatically available in the linked container. See the following examples. More info

ArangoDB 2.2.7

00ReleasesTags:

This version is deprecated. Download the new version of ArangoDB

A maintenance release for ArangoDB 2.2 is available from the usual channels.

v2.2.7 (2014-11-19)

  • fixed issue #1079: AQL editor: keyword WITH in UPDATE query is not highlighted
  • fix memory leak in cluster nodes
  • fixed registration of AQL user-defined functions in Web UI (JS shell)
  • fixed error display in Web UI for certain errors (now error message is printed instead of ‘undefined’)
  • fixed issue #1059: bug in js module console
  • fixed issue #1056: “fs”: zip functions fail with passwords
  • fixed issue #1063: Docs: measuring unit of –wal.logfile-size?
  • fixed issue #1062: Docs: typo in 14.2 Example data

The 2.2.7 Documentation: Click here

Cookbook – Recipes to make with ArangoDB

09DocumentationTags: ,

It’s new – and just for you! With the new ArangoDB Cookbook we want to guide you thru various challenges that might arise in your daily business with NoSQL – and ArangoDB in particular.

You have a problem with or need an introduction to NoSQL data modeling / scaling ArangoDB / building Foxx apps / graph processing or something related to your favorite programming language? Then have a look if there’s a recipe match in the Cookbook!

Create your own recipes and help others in the ArangoDB community. We appreciate every participation that makes the cookbook a valuable source for ArangoDB users. Just write your problem description and solution in plain markdown and start a pull request on Github.

Need an example?

Lets assume you checked the foxx introduction on our website and now you want to build your own Foxx app, but you don’t know how to start.

More info

ArangoDB 2.3: Overhauled query optimizer, AQL improvements, new Foxx features

00General, ReleasesTags:

This version is deprecated. Download the new version of ArangoDB

The new query optimizer is ready to rock the world. We are proud to announce the release of ArangoDB 2.3, available for download now. ArangoDB 2.3 is available for Linux, Windows and Mac and provides support for 16 programming languages.

Overhauled Query Optimizer

The query optimizer and executor for AQL queries have been completely overhauled. Especially the optimization of distributed queries has been improved significantly.

The query optimizer can now apply much more optimizations than in previous versions of ArangoDB. We have tried to keep the new version as compatible as possible with ArangoDB 2.2.

Have a look at Jan’s blog post “Tour around new AQL query optimizer” or read the optimizer documentation to get familiar with this new feature.

Powerful Foxx Enhancements

We can’t wait to get your feedback, so we’ve released some great new Foxx features in 2.3 with more to come in the next release.

With the new job queues feature you can run async jobs to communicate with external services, Foxx queries make writing complex AQL queries much easier and Foxx sessions will handle the authentication and session hassle for you. More info

A brief introduction to the Pregel module

00General, JavaTags:

This post is outdated, please see more recent infos below.

Please see a technical article about our current Pregel integration in our blog, details about the various Pregel algorithms ArangoDB supports in our documentation and a tutorial about Community Detection with real data in our training center.

 

 

Ever since Google introduced Pregel as a system for large-scale graph processing we thought of a way how to enable this feature in ArangoDB. So we set up an ArangoDB cluster, created some huge graphs and started evaluating the concept. We came up with a new ArangoDB module (called pregelRunner) that enables the user to write own algorithms, pass them to ArangoDB and have them executed in a Pregel-like fashion.

This means that the user’s algorithm is executed step wise on each server in the cluster in parallel for all its local vertices. In each step the vertices can send messages to each other to distribute information. These messages can be received by the other vertex in the next step. The algorithm terminates when there are no more active vertices left and no message has been sent.

We started to implement an experimental version of Pregel in ArangoDB. You need to check-out the pregel branch of ArangoDB in order to play with the following examples. Please be advised that the implementation is still in an early phase and very like to change. In this post we will provide a brief introduction to ArangoDB’s Pregel module by guiding you through the implementation of an example algorithm.

More info

How to use the ArangoDB Java Driver in batch and asynchronous mode?

01General, JavaTags: , ,

The current arangodb-java-driver supports the usage of ArangoDB’s batch and asynchronous interface. This post will guide you through the usage of these features.

The batch interface

The batch interface enables the user to stack a series of calls and execute them in a batch request. Each stacked request returns a request id that can be used to retrieve the single results from the batch response. So how do you use this feature in the java driver ?

First we create an instance of the java driver:

More info

The new ArangoDB Java Driver

00General, JavaTags: ,

A new arangodb-java-driver is out now, it’s on github. The driver is available for ArangoDB from version 2.2 onwards.

How to include the driver in your application ?

The driver is available as maven artifact. To add the driver to your project with maven, add the following code to your pom.xml:

More info