org.springframework.messaging

Interface MessageChannel

All Known Subinterfaces:

PollableChannel, SubscribableChannel

All Known Implementing Classes:

AbstractMessageChannel, AbstractSubscribableChannel, ExecutorSubscribableChannel, GenericMessagingTemplate.TemporaryReplyChannel, OrderedMessageSender

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 MessageChannel

Defines methods for sending messages.

Since:

4.0

Author:

Mark Fisher

Field Summary

Fields

Modifier and Type	Field and Description
static long	INDEFINITE_TIMEOUT Constant for sending a message without a prescribed timeout.

Method Summary

Modifier and Type	Method and Description
default boolean	send(Message<?> message) Send a Message to this channel.
boolean	send(Message<?> message, long timeout) Send a message, blocking until either the message is accepted or the specified timeout period elapses.

Field Detail

INDEFINITE_TIMEOUT

static final long INDEFINITE_TIMEOUT

Constant for sending a message without a prescribed timeout.

See Also:

Constant Field Values

Method Detail

send

default boolean send(Message<?> message)

Send a Message to this channel. If the message is sent successfully, the method returns true. If the message cannot be sent due to a non-fatal reason, the method returns false. The method may also throw a RuntimeException in case of non-recoverable errors.

This method may block indefinitely, depending on the implementation. To provide a maximum wait time, use send(Message, long).

Parameters:

message - the message to send

Returns:

whether or not the message was sent

send

boolean send(Message<?> message,
             long timeout)

Send a message, blocking until either the message is accepted or the specified timeout period elapses.

Parameters:

message - the message to send

timeout - the timeout in milliseconds or INDEFINITE_TIMEOUT

Returns:

true if the message is sent, false if not including a timeout of an interrupt of the send