Class AsyncEntityProducerWrapper

java.lang.Object

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

All Implemented Interfaces:

EntityDetails, AsyncDataProducer, AsyncEntityProducer, ResourceHolder

@Contract(threading=IMMUTABLE_CONDITIONAL)
public class AsyncEntityProducerWrapper
extends Object
implements AsyncEntityProducer

Base class for wrapping entity producers that delegates all calls to the wrapped producer. Implementations can derive from this class and override only those methods that should not be delegated to the wrapped producer.

Since:

5.0

Field Summary

Fields

Modifier and Type	Field	Description
private final AsyncEntityProducer	wrappedEntityProducer

Constructor Summary

Constructors

Constructor	Description
AsyncEntityProducerWrapper(AsyncEntityProducer wrappedEntityProducer)

Method Summary

Modifier and Type	Method	Description
int	available()	Returns the number of bytes immediately available for output.
void	failed(Exception cause)	Triggered to signal a failure in data generation.
String	getContentEncoding()	Gets content encoding of this entity, if known.
long	getContentLength()	Gets length of this entity, if known.
String	getContentType()	Gets content type of this entity, if known.
Set<String>	getTrailerNames()	Gets the preliminary declaration of trailing headers.
boolean	isChunked()	Tests the chunked transfer hint for this entity.
boolean	isRepeatable()	Determines whether the producer can consistently produce the same content after invocation of ResourceHolder.releaseResources().
void	produce(DataStreamChannel channel)	Triggered to signal the ability of the underlying data channel to accept more data.
void	releaseResources()
String	toString()

Methods inherited from class Object

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

Field Details

wrappedEntityProducer

private final AsyncEntityProducer wrappedEntityProducer

Constructor Details

AsyncEntityProducerWrapper

public AsyncEntityProducerWrapper(AsyncEntityProducer wrappedEntityProducer)

Method Details

isRepeatable

public boolean isRepeatable()

Description copied from interface: AsyncEntityProducer

Determines whether the producer can consistently produce the same content after invocation of ResourceHolder.releaseResources().

Specified by:

isRepeatable in interface AsyncEntityProducer

isChunked

public boolean isChunked()

Description copied from interface: EntityDetails

Tests the chunked transfer hint for this entity.

The behavior of wrapping entities is implementation dependent, but should respect the primary purpose.

Specified by:

isChunked in interface EntityDetails

Returns:

the chunked transfer hint for this entity.

getContentLength

public long getContentLength()

Description copied from interface: EntityDetails

Gets length of this entity, if known.

Specified by:

getContentLength in interface EntityDetails

Returns:

the length of this entity, may be 0.

getContentType

public String getContentType()

Description copied from interface: EntityDetails

Gets content type of this entity, if known.

Specified by:

getContentType in interface EntityDetails

Returns:

the content type of this entity, may be null.

getContentEncoding

public String getContentEncoding()

Description copied from interface: EntityDetails

Gets content encoding of this entity, if known.

Specified by:

getContentEncoding in interface EntityDetails

Returns:

the content encoding of this entity, may be null.

getTrailerNames

public Set<String> getTrailerNames()

Description copied from interface: EntityDetails

Gets the preliminary declaration of trailing headers.

Specified by:

getTrailerNames in interface EntityDetails

Returns:

the preliminary declaration of trailing headers.

available

public int available()

Description copied from interface: AsyncDataProducer

Returns the number of bytes immediately available for output. This method can be used as a hint to control output events of the underlying I/O session.

Please note this method should return zero if the data producer is unable to produce any more data, in which case AsyncDataProducer.produce(DataStreamChannel) method will not get triggered. The producer can resume writing out data asynchronously once more data becomes available or request output readiness events with DataStreamChannel.requestOutput().

Specified by:

available in interface AsyncDataProducer

Returns:

the number of bytes immediately available for output

See Also:

• AsyncDataProducer.produce(DataStreamChannel)
• DataStreamChannel.requestOutput()

produce

public void produce(DataStreamChannel channel)
             throws IOException

Description copied from interface: AsyncDataProducer

Triggered to signal the ability of the underlying data channel to accept more data. The data producer can choose to write data immediately inside the call or asynchronously at some later point.

Please note this method gets triggered only if AsyncDataProducer.available() returns a positive value.

Specified by:

produce in interface AsyncDataProducer

Parameters:

channel - the data channel capable of accepting more data.

Throws:

IOException - in case of an I/O error.

See Also:

• AsyncDataProducer.available()

failed

public void failed(Exception cause)

Description copied from interface: AsyncEntityProducer

Triggered to signal a failure in data generation.

Specified by:

failed in interface AsyncEntityProducer

Parameters:

cause - the cause of the failure.

releaseResources

public void releaseResources()

Specified by:

releaseResources in interface ResourceHolder

toString

public String toString()

Overrides:

toString in class Object