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Write Operations

Bulk Write Operations

Starting in v2.6, MongoDB supports bulk write commands for insert, update, and delete operations in a way that allows the driver to implement the correct semantics for BulkWriteResult and BulkWriteException.

There are two types of bulk operations, ordered and unordered bulk operations:

  1. Ordered bulk operations execute all the operations in order and error out on the first write error.

  2. Unordered bulk operations execute all the operations and report any the errors. Unordered bulk operations do not guarantee an order of execution.

Important

This guide uses the Subscriber implementations, which are described in the Quick Start Primer.

The following code provides examples using ordered and unordered operations:

// Ordered bulk operation - order is guaranteed
collection.bulkWrite(
    Arrays.asList(new InsertOneModel<>(new Document("_id", 4)),
        new InsertOneModel<>(new Document("_id", 5)),
        new InsertOneModel<>(new Document("_id", 6)),
        new UpdateOneModel<>(new Document("_id", 1),
                             new Document("$set", new Document("x", 2))),
        new DeleteOneModel<>(new Document("_id", 2)),
        new ReplaceOneModel<>(new Document("_id", 3),
                              new Document("_id", 3).append("x", 4))))
.subscribe(new ObservableSubscriber<BulkWriteResult>());
// Unordered bulk operation - no guarantee of order of operation
collection.bulkWrite(
    Arrays.asList(new InsertOneModel<>(new Document("_id", 4)),
        new InsertOneModel<>(new Document("_id", 5)),
        new InsertOneModel<>(new Document("_id", 6)),
        new UpdateOneModel<>(new Document("_id", 1),
                             new Document("$set", new Document("x", 2))),
        new DeleteOneModel<>(new Document("_id", 2)),
        new ReplaceOneModel<>(new Document("_id", 3),
                              new Document("_id", 3).append("x", 4))),
    new BulkWriteOptions().ordered(false))
.subscribe(new ObservableSubscriber<BulkWriteResult>());

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Write Operations