39fef2c70a
JIRA: https://jira.spring.io/browse/INT-4560 Reproduced and tested with ```java @SpringBootApplication public class So53521593Application { private static final Logger logger = LoggerFactory.getLogger(So53521593Application.class); public static void main(String[] args) { SpringApplication.run(So53521593Application.class, args); } @Bean public IntegrationFlow flow() { ExecutorService exec = Executors.newFixedThreadPool(10); return IntegrationFlows.from(Files.inboundAdapter(new File("/tmp/foo")).filter( new MyFilter(new SimpleMetadataStore(), "foo")), e -> e.poller(Pollers.fixedDelay(5, TimeUnit.SECONDS) .maxMessagesPerPoll(10))) .channel(MessageChannels.executor(exec)) .<File>handle((p, h) -> { try { p.delete(); logger.info(p.toString()); Thread.sleep(10_000); } catch (InterruptedException e1) { Thread.currentThread().interrupt(); } return null; }) .get(); } } class MyFilter extends FileSystemPersistentAcceptOnceFileListFilter { public MyFilter(ConcurrentMetadataStore store, String prefix) { super(store, prefix); } @Override protected long modified(File file) { long modified = super.modified(file); System.out.println(modified); return modified; } } ``` **cherry-pick to 5.0.x, 4.3.x**
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