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ArangoDB | Geo Demonstration Using Foxx – Location-Aware Applications
Geo data is getting more and more important for today’s applications. The growing number of location-aware services, IoT applications and other solutions using latitude and longitude ask for precise and fast processing of geo data.
Let me show you in this quick demonstration how you can use geo functions and visualize your data using Foxx and leaflet.js. Read more
ArangoDB FoxxChallenge: Developer Competition
The Challenge
Starting today we launch the ArangoDB #FoxxChallenge and the winner will receive a brand new Amazon Echo.
Use your knowledge about everyday needs in projects and create a Foxx service that could be helpful for others. If you need some inspiration here some ideas: Read more
How to model customer surveys in a graph database
Use-Case
The graph database use-case we are stepping through in this post is the following: In our web application we have several places where a user is led through a survey, where she decides on details for one of our products. Some of the options within the survey depend on previous decisions and some are independent.
Examples:
- Configure a new car
- Configure a new laptop
- Book extras with your flight (meal, reserve seat etc.)
- Configure a new complete kitchen
- Collect customer feedback via logic-jump surveys
ArangoDB Spartan Mode: Optimize Performance and Resource Usage
Most of us saw the fantastic movie 300 (I did it last night…again) or at least read the comics. 300 spartans barely wearing anything but achieving a lot. This little how-to will show you how to put ArangoDB into Spartan-Mode and thereby reduce memory-footprint and CPU usage.
Big thanks to Conrad from L.A. for his time and for giving us the impulse for this little how-to!
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Using GraphQL with ArangoDB: A NoSQL Database Solution
GraphQL is a query language created by Facebook for modern web and mobile applications as an alternative to REST APIs. Following the original announcement alongside Relay, Facebook has published an official specification and reference implementation in JavaScript. Recently projects outside Facebook like Meteor have also begun to embrace GraphQL.
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Foxx Module Resolution Changes in ArangoDB 2.8
The implementation of the JavaScript require function will be adjusted to improve compatibility with npm modules. The current implementation in 2.7 and earlier versions of ArangoDB strictly adheres to the CommonJS module standard, which deviates from the behaviour implemented in Node and browser bundlers.
Module paths will now be resolved in the following ways: Read more
Dockerizing a Bloom-Based Nonces Service in 10 Minutes
In this article I want to explain how to setup a nonce-microservice using docker.
Nonce are one-time tokens that are used to ensure that an action can only be taken once. In a project, we needed to ensure that a pay button is only pressed once. Note that nonces are not used to sign requests or identify a user. This is a separate mechanism.
ArangoDB contains a nonce implementation which is a variation of Bloom-filters. It allows to store nearly unlimited nonces within a limited amount of memory. Nonce are allowed to age, that is after an hour they might expire. If there is sufficient interest, I will explain the algorithm implemented in a separate blog post.
Foxx Swagger Integration: Streamline API Documentation
The generated API documentation in ArangoDB 2.6 has been updated to Swagger 2. To see the API documentation for any of your Foxx apps, open the web admin frontend and select your app from the Applications tab. For information on how to describe your own APIs in the generated documentation, see the ArangoDB documentation.
But wait, there’s more! In addition to being shown in the web admin frontend, ArangoDB 2.6 allows you to mount your app’s documentation inside the app itself. Using the new controller method apiDocumentation you can define a mount point for the app’s own documentation and apply the same access controls you already use for other routes. Depending on your needs, you can even mount the documentation of other apps in your own Foxx app, use different assets or even your own Swagger API description files. In fact, the new API documentation viewer of the web admin frontend itself is using it.
For more information on the apiDocumentation method, see the documentation. If you want to give the feature a try yourself, check out ArangoDB 3.0 or compile the latest development version from the GitHub repository.
Foxx Dependencies: Composing More Flexible Foxx Apps
Previously on the ArangoDB blog we saw how we can use the configuration field in manifest.json to make Foxx apps configurable and more re-usable. This is all well and good if we just want to pass in simple values to a Foxx app but sometimes you want to pass in entire Foxx apps. This is where dependencies come in to save the day.
Let’s say you want to use the session storage provided by the ArangoDB sessions app available on the Foxx app store using Foxx exports and imports. Because you hadn’t yet heard of configurations, you simply hard-coded the mount path of your copy of the sessions app in your code: (more…)
Reusable Foxx Apps with Configurations: ArangoDB Development
While the optional configuration field in Foxx manifests had experimental support all the way back to ArangoDB 2.1, the feature was previously undocumented and not well understood. The upcoming ArangoDB 2.6 release officially introduces Foxx configurations, allowing you to make your existing Foxx apps more re-usable and to make better use of third-party apps.
Let’s say your Foxx app needs an API key to make a request to a third-party service using the request module introduced in ArangoDB 2.5. (more…)