What is service activator in Spring Integration?

The service activator is the endpoint type for connecting any Spring-managed object to an input channel so that it may play the role of a service. If the service produces output, it may also be connected to an output channel.

What is ServiceActivator annotation?

Annotation Type ServiceActivator. @Target({METHOD,ANNOTATION_TYPE}) @Retention(RUNTIME) @Documented public @interface ServiceActivator. Indicates that a method is capable of handling a message or message payload.

What is Spring Integration for?

Spring Integration enables lightweight messaging within Spring-based applications and supports integration with external systems via declarative adapters. Those adapters provide a higher-level of abstraction over Spring’s support for remoting, messaging, and scheduling.

What is a channel in Spring Integration?

A channel in Spring Integration (and indeed, EAI) is the basic plumbing in an integration architecture. It’s the pipe by which messages are relayed from one system to another.

What is inbound and outbound in Spring Integration?

Inbound gateways are where some external system sends a request and Spring Integration replies. Outbound gateways are where Spring Integration makes the request and some external system replies.

What is Poller in spring?

Pollable Message Source. Spring Integration offers a second variation of the polling consumer pattern. For example, when retrieving messages from a remote FTP Server location, the adapter described in FTP Inbound Channel Adapter is configured with a poller to periodically retrieve messages.

What is Gateway in Spring Integration?

A gateway hides the messaging API provided by Spring Integration. It lets your application’s business logic be unaware of the Spring Integration API. By using a generic Gateway, your code interacts with only a simple interface.

What is adapter in spring?

A Channel Adapter is a Message Endpoint that enables connecting a single sender or receiver to a Message Channel. Spring Integration provides a number of adapters out of the box to support various transports, such as JMS, File, HTTP, Web Services, and Mail.