a48d54bed9
JIRA: https://jira.spring.io/browse/INT-4351 The `WatchService` reacts to the events in the file system and keep track ove the events until we poll them, e.g. via `listEligibleFiles()` in the `WatchServiceDirectoryScanner`. On the other hand the `SourcePollingChannelAdapter` calls the mentioned `listEligibleFiles()` according its polling period. At this moment the `FileListFilter` is applied to the polled files. It may happen that `LastModifiedFileListFilter` can't accept too young files yet and they are lost for the future consideration. * To allow, for example, to retain young files by the `LastModifiedFileListFilter` judgment for the future cycles add `DiscardAwareFileListFilter` with the `DiscardCallback` support. The `WatchServiceDirectoryScanner` now registers such a callback into the filter and stores discarded files into the `filesToPoll` queue for the future poll cycle. **Cherry-pick to 5.0** Fix compilation warnings * Replace `DiscardCallback` with the plain `Consumer` * Ensure uniqueness in the `WatchServiceDirectoryScanner` internal queue via a `Set` implementation, since discard callback may be called several times for the same file from the `CompositeFileListFilter` according to its nature * Add JavaDocs and Docs Change `@since` to `5.0.5`
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: http://projects.spring.io/spring-integration