org.apache.http.nio.protocol
Interface HttpAsyncResponseProducer

All Superinterfaces:
Closeable
All Known Implementing Classes:
BasicAsyncResponseProducer

public interface HttpAsyncResponseProducer
extends Closeable

HttpAsyncResponseProducer is a callback interface whose methods get invoked to generate an HTTP response message and to stream message content to a non-blocking HTTP connection on the server side.

Since:
4.2

Method Summary
 void failed(Exception ex)
          Invoked to signal that the response processing terminated abnormally.
 HttpResponse generateResponse()
          Invoked to generate a HTTP response message head.
 void produceContent(ContentEncoder encoder, IOControl ioctrl)
          Invoked to write out a chunk of content to the ContentEncoder.
 void responseCompleted(HttpContext context)
          Invoked to signal that the response has been fully written out.
 
Methods inherited from interface java.io.Closeable
close
 

Method Detail

generateResponse

HttpResponse generateResponse()
Invoked to generate a HTTP response message head.

Returns:
HTTP response message.

produceContent

void produceContent(ContentEncoder encoder,
                    IOControl ioctrl)
                    throws IOException
Invoked to write out a chunk of content to the ContentEncoder. The IOControl interface can be used to suspend output event notifications if the producer is temporarily unable to produce more content.

When all content is finished, the producer MUST call ContentEncoder.complete(). Failure to do so may cause the entity to be incorrectly delimited.

Please note that the ContentEncoder object is not thread-safe and should only be used within the context of this method call. The IOControl object can be shared and used on other thread to resume output event notifications when more content is made available.

Parameters:
encoder - content encoder.
ioctrl - I/O control of the underlying connection.
Throws:
IOException - in case of an I/O error

responseCompleted

void responseCompleted(HttpContext context)
Invoked to signal that the response has been fully written out.

Parameters:
context - HTTP context

failed

void failed(Exception ex)
Invoked to signal that the response processing terminated abnormally.

Parameters:
ex - exception


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