com.mongodb.async

接口 AsyncBatchCursor<T>

类型参数:

T - The type of documents the cursor contains

所有超级接口:

java.lang.AutoCloseable, java.io.Closeable

所有已知子接口:

MapReduceAsyncBatchCursor<T>

public interface AsyncBatchCursor<T>
extends java.io.Closeable

MongoDB returns query results as batches, and this interface provides an asynchronous iterator over those batches. The first call to the next method will return the first batch, and subsequent calls will trigger an asynchronous request to get the next batch of results. Clients can control the batch size by setting the batchSize property between calls to next.

从以下版本开始:

3.0

MongoDB documentation

OP_GET_MORE

方法概要

限定符和类型	方法和说明
void	close()
int	getBatchSize() Gets the batch size to use when requesting the next batch.
boolean	isClosed() Return true if the AsyncBatchCursor has been closed
void	next(SingleResultCallback<java.util.List<T>> callback) Returns the next batch of results.
void	setBatchSize(int batchSize) Sets the batch size to use when requesting the next batch.

方法详细资料

next

void next(SingleResultCallback<java.util.List<T>> callback)

Returns the next batch of results. A tailable cursor will block until another batch exists. After the last batch, the next call to this method will execute the callback with a null result to indicate that there are no more batches available and the cursor has been closed.

参数:

callback - callback to receive the next batch of results

抛出:

java.util.NoSuchElementException - if no next batch exists

setBatchSize

void setBatchSize(int batchSize)

Sets the batch size to use when requesting the next batch. This is the number of documents to request in the next batch.

参数:

batchSize - the non-negative batch size. 0 means to use the server default.

getBatchSize

int getBatchSize()

Gets the batch size to use when requesting the next batch. This is the number of documents to request in the next batch.

返回:

the non-negative batch size. 0 means to use the server default.

isClosed

boolean isClosed()

Return true if the AsyncBatchCursor has been closed

返回:

true if the AsyncBatchCursor has been closed

close

void close()

指定者:

close 在接口中 java.lang.AutoCloseable

指定者:

close 在接口中 java.io.Closeable