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* GH-3370: Remove synchronized from RemoteFileUtils Fixes https://github.com/spring-projects/spring-integration/issues/3370 The `synchronized` on the `RemoteFileUtils.makeDirectories()` makes an application too slow, especially when we deal with different paths in different sessions * Remove the `synchronized` from that method and rework `SftpSession.mkdir()` to return `false` when "A file cannot be created if it already exists" exception is thrown from the server. Essentially make an `exists()` call to be sure that an exception is really related to "file-already-exists" answer from the server **Cherry-pick to 5.3.x, 5.2.x & 4.3.x** * * Re-throw an exception in the `SftpSession.mkdir()` when error code is not `4` or remote dir does not exist * * Check `session.mkdir()` result in the `RemoteFileUtils` to throw an `IOException` when `false` * * Fix mock test to return `true` for `mkdir` instead of `null`
Spring Integration 
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Reporting Security Vulnerabilities
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Checking out and Building
To check out the project and build from the 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 an available heap and permgen for Gradle:
GRADLE_OPTS='-XX:MaxPermSize=1024m -Xmx1024m'
To build and install jars into your local Maven cache:
./gradlew publishToMavenLocal
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