Class ThrottledInputStream

java.lang.Object

java.io.InputStream

java.io.FilterInputStream

org.apache.commons.io.input.ProxyInputStream

org.apache.commons.io.input.CountingInputStream

org.apache.commons.io.input.ThrottledInputStream

All Implemented Interfaces:

Closeable, AutoCloseable

public final class ThrottledInputStream
extends CountingInputStream

Provides bandwidth throttling on an InputStream as a filter input stream. The throttling examines the number of bytes read from the underlying InputStream, and sleeps for a time interval if the byte-transfer is found to exceed the specified maximum rate. Thus, while the read-rate might exceed the maximum for a short interval, the average tends towards the specified maximum, overall.

To build an instance, call builder().

Inspired by Apache HBase's class of the same name.

Since:

2.16.0

See Also:

• ThrottledInputStream.Builder

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ThrottledInputStream.Builder	Builds a new ThrottledInputStream.

Nested classes/interfaces inherited from class ProxyInputStream

ProxyInputStream.AbstractBuilder<T,B>

Field Summary

Fields inherited from class FilterInputStream

in

Method Summary

Modifier and Type	Method	Description
protected void	beforeRead(int n)	Invoked by the read methods before the call is proxied.
static ThrottledInputStream.Builder	builder()	Constructs a new ThrottledInputStream.Builder.
String	toString()

Methods inherited from class CountingInputStream

afterRead, getByteCount, getCount, resetByteCount, resetCount, skip

Methods inherited from class ProxyInputStream

available, close, handleIOException, mark, markSupported, read, read, read, reset, setReference, unwrap

Methods inherited from class InputStream

nullInputStream, readAllBytes, readNBytes, readNBytes, skipNBytes, transferTo

Methods inherited from class Object

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

Method Details

builder

public static ThrottledInputStream.Builder builder()

Constructs a new ThrottledInputStream.Builder.

Returns:

a new ThrottledInputStream.Builder.

beforeRead

protected void beforeRead(int n)
                   throws IOException

Description copied from class: ProxyInputStream

Invoked by the read methods before the call is proxied. The number of bytes that the caller wanted to read (1 for the ProxyInputStream.read() method, buffer length for ProxyInputStream.read(byte[]), etc.) is given as an argument.

Subclasses can override this method to add common pre-processing functionality without having to override all the read methods. The default implementation does nothing.

Note this method is not called from ProxyInputStream.skip(long) or ProxyInputStream.reset(). You need to explicitly override those methods if you want to add pre-processing steps also to them.

Overrides:

beforeRead in class ProxyInputStream

Parameters:

n - number of bytes that the caller asked to be read.

Throws:

IOException - if the pre-processing fails in a subclass.

toString

public String toString()

Overrides:

toString in class Object