使用JAVA在MongoDB中进行无序批量更新

Question

我有MongoDB文件，如：

{_id:1001, "title":"abc", "author":"xyz"}

为100万个此类文档更新作者的最佳方法是什么？我开始了解MongoDB中的无序批量更新。如何使用Mongo的Java驱动程序实现它。

Answer 1

    MongoClient mongo = new MongoClient("localhost", 27017);
    DB db = (DB) mongo.getDB("test1");
    DBCollection collection = db.getCollection("collection");
    BulkWriteOperation builder = collection.initializeUnorderedBulkOperation();
    builder.find(new BasicDBObject("_id", 1001)).upsert()
                    .replaceOne(new BasicDBObject("_id", 1001).append("author", "newName"));
    //append all other documents 
    builder.execute();