ArangoDB Use Graph Module within Transactions

Question

I'm using the Java driver (4.1) and I need the guarantees of the named graph operations, but I need to do several of these higher level operations in a transaction.

Say for instance I want to add several vertices to a collection in one go, and I want to rollback all operations upon any failure. If I'm using the Java driver, what I'd like is to do something like this:

db.beginTransaction() ; // this method doesn't exist
db.graph("myGraph").vertexCollection(vertexCollectionName1).insertVertex(a);
db.graph("myGraph").vertexCollection(vertexCollectionName1).insertVertex(b);
db.graph("myGraph").vertexCollection(vertexCollectionName2).insertVertex(c);
// ...so on...
db.executeTransaction(); // rollback all on failure, this method doesn't exist

I'm not very keen on doing the work in JavaScript, but if I understand correctly, the analogue to what I want may look like something like this, as a JS function run inside a transaction (using Java driver, but specifying JS function--hardcoded, no params):

String action = "function (params) { "
        + "var graph_module = require('@arangodb/general-graph');"
        + "var graph = graph_module._graph('myGraph');"
        + "graph.collection1.save({name: 'a'});"
        + "graph.collection1.save({name: 'b'});"
        + "graph.collection2.save({name: 'c'});"
        // ...so on...  
        + "}";

db.transaction(action, String.class, options); // request through Java driver

I may want to mix in some other edge updates, deletes--all done at a high level through the graph module--in a single transaction. My question is, can I get what I want, and is this the right way?

I haven't tried the above JS transaction, yet, but I'm looking for guidance before darting down blind alleys.

mpv89 mpv89 · Accepted Answer · 2017-02-13T14:47:01

Unfortunately there is - currently - no other way than creating a server-side transaction with javascript. Your second code sample is currently the right and only way.

But there will be client-side transactions within one of the next major releases (3.x) of ArangoDB. Then you should be able to work like in your first code sample.

ArangoDB Use Graph Module within Transactions

1 Answers