MongoDB在执行后重新初始化BulkWriteOperation

Question

我首先初始化BulkWriteOperation并通过for循环向其添加几个插入。然后我执行。然后我重新初始化BulkWriteOperation并尝试添加更多插入，但我一直得到：

java.lang.IllegalStateException: already executed

我的代码：

BulkWriteOperation builder = coll.initializeOrderedBulkOperation();

for( int i = 0; i < 10; i++ ) {
    BasicDBObject doc = new BasicDBObject("Something", something);
    builder.insert(doc);
}

builder.execute();

builder = coll.initializeOrderedBulkOperation();

for( int i = 0; i < 10; i++ ) {
    BasicDBObject doc = new BasicDBObject("Something", something);
    builder.insert(doc);
}

builder.execute();

Answer 1

执行它之后，没有办法重置现有的BulkWriteOperation对象，所以你只需要创建一个像这样的新对象：

builder = coll.initializeOrderedBulkOperation();