Package org.apache.hc.core5.http.nio.entity

Class DigestingEntityConsumer<T>

java.lang.Object

org.apache.hc.core5.http.nio.entity.DigestingEntityConsumer<T>

All Implemented Interfaces:

AsyncDataConsumer, AsyncEntityConsumer<T>, ResourceHolder

public class DigestingEntityConsumer<T>
extends Object
implements AsyncEntityConsumer<T>

AsyncEntityConsumer decorator that calculates a digest hash from the data stream content and keeps the list of trailers received with the data stream.

Since:

5.0

Field Summary

Fields

Modifier and Type	Field	Description
private byte[]	digest
private final MessageDigest	digester
private final List<Header>	trailers
private final AsyncEntityConsumer<T>	wrapped

Constructor Summary

Constructors

Constructor	Description
DigestingEntityConsumer(String algo, AsyncEntityConsumer<T> wrapped)

Method Summary

Modifier and Type	Method	Description
void	consume(ByteBuffer src)	Triggered to pass incoming data to the data consumer.
void	failed(Exception cause)	Triggered to signal a failure in data processing.
T	getContent()	Returns the result of entity processing when it becomes available or null if the entity is still being received.
byte[]	getDigest()	Returns digest hash.
List<Header>	getTrailers()	List of trailers sent with the data stream.
void	releaseResources()
void	streamEnd(List<? extends Header> trailers)	Triggered to signal termination of the data stream.
void	streamStart(EntityDetails entityDetails, FutureCallback<T> resultCallback)	Signals beginning of an incoming request entity stream.
void	updateCapacity(CapacityChannel capacityChannel)	Triggered to signal ability of the underlying data stream to receive data capacity update.

Methods inherited from class java.lang.Object

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

Field Details

wrapped

private final AsyncEntityConsumer<T> wrapped

trailers

private final List<Header> trailers

digester

private final MessageDigest digester

digest

private volatile byte[] digest

Constructor Details

DigestingEntityConsumer

public DigestingEntityConsumer(String algo,
 AsyncEntityConsumer<T> wrapped)
                        throws NoSuchAlgorithmException

Throws:

NoSuchAlgorithmException

Method Details

streamStart

public void streamStart(EntityDetails entityDetails,
 FutureCallback<T> resultCallback)
                 throws IOException,
HttpException

Description copied from interface: AsyncEntityConsumer

Signals beginning of an incoming request entity stream.

Specified by:

streamStart in interface AsyncEntityConsumer<T>

Parameters:

entityDetails - the details of the incoming message entity.

resultCallback - the result callback.

Throws:

IOException

HttpException

updateCapacity

public void updateCapacity(CapacityChannel capacityChannel)
                    throws IOException

Description copied from interface: AsyncDataConsumer

Triggered to signal ability of the underlying data stream to receive data capacity update. The data consumer can choose to write data immediately inside the call or asynchronously at some later point.

Specified by:

updateCapacity in interface AsyncDataConsumer

Parameters:

capacityChannel - the channel for capacity updates.

Throws:

IOException

consume

public void consume(ByteBuffer src)
             throws IOException

Description copied from interface: AsyncDataConsumer

Triggered to pass incoming data to the data consumer. The consumer must consume the entire content of the data buffer. The consumer must stop incrementing its capacity on the capacity channel if it is unable to accept more data. Once the data consumer has handled accumulated data or allocated more intermediate storage it can update its capacity information on the capacity channel.

Specified by:

consume in interface AsyncDataConsumer

Parameters:

src - data source.

Throws:

IOException

streamEnd

public void streamEnd(List<? extends Header> trailers)
               throws HttpException,
IOException

Description copied from interface: AsyncDataConsumer

Triggered to signal termination of the data stream.

Specified by:

streamEnd in interface AsyncDataConsumer

Parameters:

trailers - data stream trailers.

Throws:

HttpException

IOException

failed

public void failed(Exception cause)

Description copied from interface: AsyncEntityConsumer

Triggered to signal a failure in data processing.

Specified by:

failed in interface AsyncEntityConsumer<T>

Parameters:

cause - the cause of the failure.

getContent

public T getContent()

Description copied from interface: AsyncEntityConsumer

Returns the result of entity processing when it becomes available or null if the entity is still being received.

Specified by:

getContent in interface AsyncEntityConsumer<T>

Returns:

the response processing result.

releaseResources

public void releaseResources()

Specified by:

releaseResources in interface ResourceHolder

getTrailers

public List<Header> getTrailers()

List of trailers sent with the data stream.

Returns:

the list of trailers sent with the data stream

getDigest

public byte[] getDigest()

Returns digest hash.

Returns:

the digest hash value.