spring - How can I use S3InboundFileSynchronizer to synchronize an S3Bucket organized with directories? -

i'm trying use s3inboundfilesynchronizer synchronize s3bucket local directory. bucket organised sub-directories such as:

bucket -> 2016 -> 08 -> daily-report-20160801.csv daily-report-20160802.csv etc...

using configuration:

@bean         public s3inboundfilesynchronizer s3inboundfilesynchronizer() {             s3inboundfilesynchronizer synchronizer = new s3inboundfilesynchronizer(amazons3());             synchronizer.setdeleteremotefiles(true);             synchronizer.setpreservetimestamp(true);             synchronizer.setremotedirectory("redacted");             synchronizer.setfilter(new s3regexpatternfilelistfilter(".*\\.csv$"));             expression expression = parser.parseexpression("#this.substring(#this.lastindexof('/')+1)");             synchronizer.setlocalfilenamegeneratorexpression(expression);             return synchronizer;         } 

i'm able far connecting bucket , listing contents. when comes time read bucket following exception thrown:

org.springframework.messaging.messagingexception: problem occurred while synchronizing remote local directory; nested exception    org.springframework.messaging.messagingexception: failed execute on session;  nested exception  java.lang.illegalstateexception: 'path' must in pattern [bucket/key]. @ org.springframework.integration.file.remote.synchronizer.abstractinboundfilesynchronizer.synchronizetolocaldirectory(abstractinboundfilesynchronizer.java:266) 

reviewing code seems it'd impossible ever synchronize s3bucket w/ sub-directories:

private string[] splitpathtobucketandkey(string path) {     assert.hastext(path, "'path' must not empty string.");     string[] bucketkey = path.split("/");     assert.state(bucketkey.length == 2, "'path' must in pattern [bucket/key].");     assert.state(bucketkey[0].length() >= 3, "s3 bucket name must @ least 3 characters long.");     bucketkey[0] = resolvebucket(bucketkey[0]);     return bucketkey; }  

is there configuration i'm missing or bug?

(i'm assuming it's bug 'till i'm told otherwise i've submitted pull request proposed fix.)

yes, bug , submitted pullrequest fix.

only solution workaround custom sessionfactory<s3objectsummary> returns custom s3session extension provided fix in pr.