Package de.otto.synapse.endpoint

Interface MessageEndpoint

All Known Subinterfaces:
MessageLogReceiverEndpoint, MessageQueueReceiverEndpoint, MessageReceiverEndpoint, MessageSenderEndpoint
All Known Implementing Classes:
AbstractMessageEndpoint, AbstractMessageLogReceiverEndpoint, AbstractMessageReceiverEndpoint, AbstractMessageSenderEndpoint, DelegateMessageLogReceiverEndpoint, DelegateMessageQueueReceiverEndpoint, DelegateMessageSenderEndpoint
public interface MessageEndpoint
Endpoint that is used by an application to access the messaging infrastructure to send or receive messages.

Message Endpoint

The MessageEndpoint class is intended to derive message sender, message receiver or message-log receiver endpoints.

Message Endpoint code is custom to both the application and the messaging system’s client API. The rest of the application knows little about message formats, messaging channels, or any of the other details of communicating with other applications via messaging. It just knows that it has a request or piece of data to send to another application, or is expecting those from another application.

It is the messaging endpoint code that takes that command or data, makes it into a message, and sends it on a particular messaging channel. It is the endpoint that receives a message, extracts the contents, and gives them to the application in a meaningful way.

See Also:

  • Method Details

    • getChannelName

      @Nonnull String getChannelName()
      Returns the name of the channel.

      The channel name corresponds to the name of the underlying stream, queue or message log.

      Returns:
      name of the channel

    • getInterceptorChain

      @Nonnull InterceptorChain getInterceptorChain()
      Returns the InterceptorChain of the MessageEndpoint.
      Returns:
      InterceptorChain

    • getEndpointType

      @Nonnull EndpointType getEndpointType()
      Returns the type of the MessageEndpoint, either EndpointType.SENDER or EndpointType.RECEIVER.
      Returns:
      EndpointType

    • intercept

      @Nullable TextMessage intercept(@Nonnull TextMessage message)
      Intercepts a message using all registered interceptors and returns the resulting message.

      The interceptors are called in order. The result of one interceptor is propagated to the next interceptor in the chain, until the end of the chain is reached, or one interceptor has returned null.

      If null is returned, the message must be dropped by the AbstractMessageEndpoint.

      Every interceptor may transform the message, or may take additional actions like, for example, logging, monitoring or other things.

      Parameters:
      message - the message to intercept
      Returns:
      the (possibly modified) message, or null if the message should be dropped.