org.apache.hadoop.hbase.client

类 BatchScanResultCache

java.lang.Object

org.apache.hadoop.hbase.client.BatchScanResultCache

@InterfaceAudience.Private
public class BatchScanResultCache
extends Object

A scan result cache for batched scan, i.e, scan.getBatch() > 0 && !scan.getAllowPartialResults().

If user setBatch(5) and rpc returns 3+5+5+5+3 cells, we should return 5+5+5+5+1 to user. setBatch doesn't mean setAllowPartialResult(true).

从以下版本开始:

2.0.0

字段概要

字段

限定符和类型	字段和说明
static Result[]	EMPTY_RESULT_ARRAY

构造器概要

构造器

构造器和说明
BatchScanResultCache(int batch)

方法概要

限定符和类型	方法和说明
Result[]	addAndGet(Result[] results, boolean isHeartbeatMessage) Add the given results to cache and get valid results back.
void	clear() Clear the cached result if any.
int	numberOfCompleteRows() Return the number of complete rows.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

EMPTY_RESULT_ARRAY

public static final Result[] EMPTY_RESULT_ARRAY

构造器详细资料

BatchScanResultCache

public BatchScanResultCache(int batch)

方法详细资料

addAndGet

public Result[] addAndGet(Result[] results,
                          boolean isHeartbeatMessage)
                   throws IOException

Add the given results to cache and get valid results back.

参数:

results - the results of a scan next. Must not be null.

isHeartbeatMessage - indicate whether the results is gotten from a heartbeat response.

返回:

valid results, never null.

抛出:

IOException

clear

public void clear()

Clear the cached result if any. Called when scan error and we will start from a start of a row again.

numberOfCompleteRows

public int numberOfCompleteRows()

Return the number of complete rows. Used to implement limited scan.