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Spring Integration 4.1 to 4.2 Migration Guide

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Artem Bilan edited this page Mar 6, 2015 · 12 revisions

##Class Package Change

  • The ScatterGatherHandler class has been moved from org.springframework.integration.handler to org.springframework.integration.scattergather.

##TCP Serializers

The TCP Serializers no longer flush() the OutputStream; this is now done by the TcpNxxConnection classes. If you are using the serializers directly within user code, you may have to flush() the OutputStream after serialization.

##Reactor dependency changes

The Project Reactor has been upgraded to version 2.0 and its dependency has been marked as optional, to avoid extra transitive dependencies for those applications, which aren't interested in the Reactive Streams features, like Promise Gateway.

Those application which already uses Reactor with Spring Integration since version 4.1 must include its dependency explicitly now:

compile "io.projectreactor:reactor-core:2.0.0.RELEASE"

In addition the FunctionIterator has been changed to use org.springframework.integration.util.Function instead of similar class from the Reactor before.

Important. Since version 2.0 the Reactor is based on the Reactive Streams and there were done a lot of great changes, including package location. So, be sure that you have updated your code which is based on the previous Reactor version.

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