Bulk Upsert with MongoDB Java 3.0 Driver

Question

In the earlier versions of MongoDB Java drivers , to run a query and do unordered bulk upsert on the result all we had do was :

BulkWriteOperation bulk = dbC         


        

Answer 1

You can still use all of the functionality, it's just that BulkWrites now have a different syntax:

    MongoCollection collection = db.getCollection("sample");

    List> updates = Arrays.>asList(
        new UpdateOneModel(
                new Document(),                   // find part
                new Document("$set",1),           // update part
                new UpdateOptions().upsert(true)  // options like upsert
        )
    );

    BulkWriteResult bulkWriteResult = collection.bulkWrite(updates);

So you use the UpdateOneModel ( or for many if you want ) and set the UpdateOptions as the third argument to the constructor.

Takes some getting used to, but it's basically just building "Lists" with all the same syntax as elsewhere. I guess that's the main reason for the change.