Package org.springframework.messaging

Interface MessageChannel

All Known Subinterfaces:
PollableChannel, SubscribableChannel
All Known Implementing Classes:
AbstractMessageChannel, AbstractSubscribableChannel, ExecutorSubscribableChannel, OrderedMessageChannelDecorator
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
    Description
    static final long
    INDEFINITE_TIMEOUT
    Constant for sending a message without a prescribed timeout.

  • Method Summary

    Modifier and Type
    Method
    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 Details

    • INDEFINITE_TIMEOUT

      static final long INDEFINITE_TIMEOUT
      Constant for sending a message without a prescribed timeout.
      See Also:

  • Method Details

    • 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 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