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* Add initial support for RSockets * Add `spring-integration-rsocket` module and respective dependencies * Implement `RSocketOutboundGateway` based on the Spring Messaging `RSocketRequester`. This component supports dynamic RSocket properties via expressions against request message. to handle `Publisher` for requests, it must be present in the request message `payload` instead of `FluxMessageChannel` upstream, since the last one just flattens events to be handled in the `MessageHandler` one by one. The result `Mono` is subscribed downstream in the `FluxMessageChannel` or directly by the `AbstractReplyProducingMessageHandler`. If result is a `Flux` it is just wrapped into the `Mono` to be processed downstream by end-user code. The point is that these request/replies are volatile and live in the particular context meanwhile a `FluxMessageChannel` is long living publisher in the application context boundaries. * The `RSocketOutboundGatewayIntegrationTests` is an adapted copy of `RSocketClientToServerIntegrationTests` from Spring Messaging * Add `doOnError()` into the `Flux` created in the `AbstractMessageProducingHandler` for `Publisher` replies * * Use singular for the `RSocket` term * Use no-op `Consumer` for the `strategiesConfigurer` and `factoryConfigurer` in the `RSocketOutboundGateway` and also `Assert.notNull()` in the appropriate setters to avoid null check during `RSocketRequester.builder()` initialization * Use `TcpServer.create().port(0)` in the `RSocketOutboundGatewayIntegrationTests` to allow to select free OS port and bind into it. The selected port is used later for client configuration in the `RSocketOutboundGateway` bean definition * * Change `RSocketOutboundGatewayIntegrationTests.PORT` to lower case
Spring Integration 
Checking out and Building
To check out the project and build from source, do the following:
git clone git://github.com/spring-projects/spring-integration.git
cd spring-integration
./gradlew build
NOTE: While Spring Integration runs with Java SE 6 or higher, a Java 8 compiler is required to build the project.
If you encounter out of memory errors during the build, increase available heap and permgen for Gradle:
GRADLE_OPTS='-XX:MaxPermSize=1024m -Xmx1024m'
To build and install jars into your local Maven cache:
./gradlew install
To build api Javadoc (results will be in build/api):
./gradlew api
To build reference documentation (results will be in build/reference):
./gradlew reference
To build complete distribution including -dist, -docs, and -schema zip files (results will be in build/distributions)
./gradlew dist
Using Eclipse
To generate Eclipse metadata (.classpath and .project files), do the following:
./gradlew eclipse
Once complete, you may then import the projects into Eclipse as usual:
File -> Import -> Existing projects into workspace
Browse to the 'spring-integration' root directory. All projects should import free of errors.
Using IntelliJ IDEA
To generate IDEA metadata (.iml and .ipr files), do the following:
./gradlew idea
Resources
For more information, please visit the Spring Integration website at: https://projects.spring.io/spring-integration