Adding/calling non-AQL server side functions in ArangoDB?

Question

I know that ArangoDB allows for custom AQL functions to be defined server side, but is it possible to define server-side Javascript functions that can be called during transactions?

I'm using the Java driver to connect to ArangoDB, which performs transactions by sending a Javascript function as a string.

To avoid sending a large and complex string every time (one transaction I'm using is ~500 lines long), I'd prefer to have it stored server-side, and called more simply from Java.

E.g. instead of running something like:

String action = "function (params) {"
              + "const db = require('@arangodb').db;"
              + "return db._query('FOR i IN test RETURN i._key').toArray();"
              + "}";
String[] keys = arango.db().transaction(action, String[].class, new TransactionOptions());

I'd like to call something like:

String action = "my_function";
String[] keys = arango.db().transaction(action, String[].class, new TransactionOptions());

Or:

String action = "function(params) {"
              + "const my_function = require("somefunc");
              + "return my_function(params);
              + "}";

Is this possible to achieve?

CodeManX · Accepted Answer · 2019-06-20 14:05:05Z

1

You can write custom endpoints with Foxx.

It is a microservice framework written in JavaScript that lets you execute complex JS code on the server-side, with access to ArangoDB's internal JS API (db object etc.). You can encapsulate whatever business logic in it, e.g. your 500 lines of transaction code and add some parameters to control it from outside without having to send all the code each time.

answered Jun 20, 2019 at 14:05

CodeManX

12.1k5 gold badges55 silver badges74 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Dave Challis Over a year ago

I considered something like that, but in my case the transactions I need are quite dynamic (based on some java business logic), so it wouldn't be easy to set up a Foxx endpoint without duplicating/migrating all the existing logic there. They all l require some shared functions, which currently get repeated in every transaction, so that's the main part I'd like to move server-side.

camba1 Over a year ago

Well, you can setup shared code in Foxx Services. You can create one service that contains your shared functions and then call it from your other end points. The documentation to link services can be found here : arangodb.com/docs/stable/foxx-guides-dependencies.html

Collectives™ on Stack Overflow

Adding/calling non-AQL server side functions in ArangoDB?

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related