org.apache.hadoop.hbase.io.hadoopbackport

类 ThrottledInputStream

java.lang.Object

java.io.InputStream

org.apache.hadoop.hbase.io.hadoopbackport.ThrottledInputStream

所有已实现的接口:

Closeable, AutoCloseable

@InterfaceAudience.Private
public class ThrottledInputStream
extends InputStream

The ThrottleInputStream provides bandwidth throttling on a specified InputStream. It is implemented as a wrapper on top of another InputStream instance. The throttling works by examining the number of bytes read from the underlying InputStream from the beginning, and sleep()ing for a time interval if the byte-transfer is found exceed the specified tolerable maximum. (Thus, while the read-rate might exceed the maximum for a given short interval, the average tends towards the specified maximum, overall.)

构造器概要

构造器

构造器和说明
ThrottledInputStream(InputStream rawStream)
ThrottledInputStream(InputStream rawStream, long maxBytesPerSec)

方法概要

限定符和类型	方法和说明
void	close()
long	getBytesPerSec() Getter for the read-rate from this stream, since creation.
long	getTotalBytesRead() Getter for the number of bytes read from this stream, since creation.
long	getTotalSleepTime() Getter the total time spent in sleep.
int	read()
int	read(byte[] b)
int	read(byte[] b, int off, int len)
int	read(long position, byte[] buffer, int offset, int length) Read bytes starting from the specified position.
String	toString()

从类继承的方法 java.io.InputStream

available, mark, markSupported, reset, skip

从类继承的方法 java.lang.Object

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

构造器详细资料

ThrottledInputStream

public ThrottledInputStream(InputStream rawStream)

ThrottledInputStream

public ThrottledInputStream(InputStream rawStream,
                            long maxBytesPerSec)

方法详细资料

close

public void close()
           throws IOException

指定者:

close 在接口中 Closeable

指定者:

close 在接口中 AutoCloseable

覆盖:

close 在类中 InputStream

抛出:

IOException

read

public int read()
         throws IOException

指定者:

read 在类中 InputStream

抛出:

IOException

read

public int read(byte[] b)
         throws IOException

覆盖:

read 在类中 InputStream

抛出:

IOException

read

public int read(byte[] b,
                int off,
                int len)
         throws IOException

覆盖:

read 在类中 InputStream

抛出:

IOException

read

public int read(long position,
                byte[] buffer,
                int offset,
                int length)
         throws IOException

Read bytes starting from the specified position. This requires rawStream is an instance of PositionedReadable.

参数:

position -

buffer -

offset -

length -

返回:

the number of bytes read

抛出:

IOException

getTotalBytesRead

public long getTotalBytesRead()

Getter for the number of bytes read from this stream, since creation.

返回:

The number of bytes.

getBytesPerSec

public long getBytesPerSec()

Getter for the read-rate from this stream, since creation. Calculated as bytesRead/elapsedTimeSinceStart.

返回:

Read rate, in bytes/sec.

getTotalSleepTime

public long getTotalSleepTime()

Getter the total time spent in sleep.

返回:

Number of milliseconds spent in sleep.

toString

public String toString()

覆盖:

toString 在类中 Object