public interface PollableChannel extends MessageChannel
MessageChannel from which messages may be actively received through polling.INDEFINITE_TIMEOUT| Modifier and Type | Method and Description | 
|---|---|
| Message<?> | receive()Receive a message from this channel, blocking indefinitely if necessary. | 
| Message<?> | receive(long timeout)Receive a message from this channel, blocking until either a message is available
 or the specified timeout period elapses. | 
send, sendMessage<?> receive()
Message or null if interruptedMessage<?> receive(long timeout)
timeout - the timeout in milliseconds or MessageChannel.INDEFINITE_TIMEOUT.Message or null if the specified timeout
 period elapses or the message reception is interrupted