bce22900aa
JIRA: https://jira.spring.io/browse/INT-3698 The `HttpRequestExecutingMessageHandler` added two internal `Converters` to the `ConversionService` before. In case of parent-child environment it causes memory leak: closing of child context doesn't release `HttpRequestExecutingMessageHandler` instances, because those internal `Converters` aren't `static`, hence bounded to outer instance. Actually after introduction since `4.0` version to the `HttpRequestExecutingMessageHandler` the code like: ``` Assert.isTrue(expectedResponseType instanceof Class<?> || expectedResponseType instanceof String || expectedResponseType instanceof ParameterizedTypeReference, "'expectedResponseType' can be an instance of 'Class<?>', 'String' or 'ParameterizedTypeReference<?>'."); if (expectedResponseType instanceof String && StringUtils.hasText((String) expectedResponseType)){ expectedResponseType = ClassUtils.forName((String) expectedResponseType, ClassUtils.getDefaultClassLoader()); } ``` These converters are redundant. In addition remove the `expected type` for the `uriVariablesExpression` evaluation to avoid `MapToMapConverter`. **Cherry-pick to 4.1.x, 4.0.x** INT-3698: Provide robust logic for the `uriExpression` and `httpMethodExpression` Make some polishing around `Assert`s, when `IllegalStateException` must be presented instead of `IllegalArgumentException` for the expression evaluation results. Polishing Conflicts: spring-integration-http/src/test/java/org/springframework/integration/http/config/OutboundResponseTypeTests.java Resolved.
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
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: http://projects.spring.io/spring-integration