Spring Integration
- 1. Spring Integration Usman Yaqoob Java Developer Email id:usmannomi125@gmail.com
- 2. • Event Driven ,Messaging Architecture Enable light weight messaging with in spring base application. Share information quickly. Make application loosely coupled.
- 3. Support integration with external systems via adapters.
- 4. Core Concepts Messages Endpoint Message Channels
- 5. Message Channel A message channel is a pipe that connects endpoints, and where messages travel through. Producers send messages to a channel and consumers receive them from a channel.
- 6. Point To Point There’s only one receiver connected to the message channel.
- 7. Transformer This endpoint is used for payload conversion It converts the type of the payload to another type. For example, from String to XML document. This type of endpoint increases loose-coupling between producers and consumers, because the consumer doesn’t need to know what is the created type of the producer
- 8. Router Router allows you to redirect a message to a specific message channel depending on a condition. The following example uses a payload type router. It will receive messages from the request channel, and depending of what type the payload is, it will send it to a different output channel:
- 9. Channel Adapters The channel adapter is the endpoint that allows your application to connect with external systems Inbound channel adapter: Unidirectional. It receives a message from an external system. It then enters to our messaging system through a message channel, where we will handle it. Outbound channel adapter: Unidirectional. Our message system creates a message and sends it to an external system. Inbound gateway: Bidirectional. A message enters into the application and expects a response. The response will be sent back to the external system. Outbound gateway: Bidirectional. The application creates a message and sends it to the external system. The gateway will then wait for a response.
- 10. Filter A filter is used to decide if a message should continue its way or on the contrary, dropped. To decide what to do, it is based on some criteria. A filter method returns a boolean type. If it returns false, the message will be discarded: