A Message channel is a basic architectural pattern of a messaging system and is used fundamentally for exchanging data between applications. An application can use a channel to make a specific type of data available to any receiver applications that need to consume that type of data.
This chapter introduces different types of channels used in a messaging system, their behaviors, and how each of them can be simulated using WSO2 ESB.
 | How the caller can be sure that exactly one receiver will receive the document or perform the call. | |
|---|---|---|
 | How the sender broadcasts an event to all interested receivers. | |
 | How the application sends a data item such that the receiver will know how to process it. | |
 | How a messaging receiver gracefully handles a message that makes no sense. | |
 | What the messaging system does with a message it cannot deliver. | |
 | How the sender ensures delivery of a message, even if the messaging system fails. | |
 | How to connect an application to the messaging system to send/receive messages. | |
 | How multiple messaging systems can be connected so that messages available on one are also available on the others. | |
 | An architecture enabling separate applications to work together in a decoupled fashion such that applications can be easily added or removed without affecting the others. |