Package org.springframework.cloud.stream.binder

Interface PollableSource<H>

Type Parameters:

H - the handler type to process the result of the poll.

All Known Subinterfaces:

PollableMessageSource

All Known Implementing Classes:

DefaultPollableMessageSource

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface PollableSource<H>

A mechanism to poll a consumer.

Since:

2.0

Author:

Gary Russell

Method Summary

Modifier and Type	Method	Description
boolean	poll(H handler)	Poll the consumer.
default boolean	poll(H handler, org.springframework.core.ParameterizedTypeReference<?> type)	Poll the consumer and convert the payload to the type.

Method Details

poll

boolean poll(H handler)

Poll the consumer.

Parameters:

handler - the handler.

Returns:

true if a message was handled.

poll

default boolean poll(H handler,
 org.springframework.core.ParameterizedTypeReference<?> type)

Poll the consumer and convert the payload to the type. Throw a RequeueCurrentMessageException to force the current message to be requeued in the broker (after retries are exhausted, if configured).

Parameters:

handler - the handler.

type - the type.

Returns:

true if a message was handled.