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public interface HttpAsyncRequestProducer
HttpAsyncRequestProducer is a callback interface whose methods get invoked to generate an HTTP request message and to stream message content to a non-blocking HTTP connection.
Repeatable request producers capable of generating the same request message more than once can be reset to their initial state by calling theresetRequest()
method, at which point request producers are
expected to release currently allocated resources that are no longer needed
or re-acquire resources needed to repeat the process.
Method Summary | |
---|---|
void |
failed(Exception ex)
Invoked to signal that the response processing terminated abnormally. |
HttpRequest |
generateRequest()
Invoked to generate a HTTP request message head. |
HttpHost |
getTarget()
Invoked to obtain the request target host. |
boolean |
isRepeatable()
Determines whether or not this producer is capable of producing HTTP request messages more than once. |
void |
produceContent(ContentEncoder encoder,
IOControl ioctrl)
Invoked to write out a chunk of content to the ContentEncoder . |
void |
requestCompleted(HttpContext context)
Invoked to signal that the request has been fully written out. |
void |
resetRequest()
Invoked to reset the producer to its initial state. |
Methods inherited from interface java.io.Closeable |
---|
close |
Method Detail |
---|
HttpHost getTarget()
HttpRequest generateRequest() throws IOException, HttpException
HttpEntityEnclosingRequest
interface if it is
to enclose a content entity. The produceContent(ContentEncoder, IOControl)
method will not be invoked if HttpEntityEnclosingRequest.getEntity()
returns null
.
HttpException
- in case of HTTP protocol violation
IOException
- in case of an I/O errorvoid produceContent(ContentEncoder encoder, IOControl ioctrl) throws IOException
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.
encoder
- content encoder.ioctrl
- I/O control of the underlying connection.
IOException
- in case of an I/O errorvoid requestCompleted(HttpContext context)
context
- HTTP contextvoid failed(Exception ex)
ex
- exceptionboolean isRepeatable()
void resetRequest() throws IOException
IOException
- in case of an I/O error
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