[SOLVED] How to skip the header row(first line) of the file in springcloudstream using DSL?

How to skip the header row(first line) of the file in springcloudstream using DSL?

I am using Spring cloud stream to read a file and split using file splitter and emit each line as a message using DSL style, the file am reading has a header row, just wondering if there is an easy way to skip the header row before/after reading.

Any help is appreciated.

here is how my splitter and integrationFlow looks like:

enter code here
  return IntegrationFlows
            .from("....")
            .split(Files.splitter(true, true)/
            .charset(StandardCharsets.UTF_8)
            .applySequence(true), //emmit sequenceNumber to header
             e -> e.id("fileSplitter")
            );


enter code here
    IntegrationFlow integrationFlow = integrationFlowBuilder
            .<Object, Class<?>>route(Object::getClass, m -> m
                    .channelMapping(FileSplitter.FileMarker.class, "markers.input")
                    .channelMapping(String.class, "lines.input"))
            .get();

Solution

If I read this right you are using one of our OOB apps, the file source: https://github.com/spring-cloud-stream-app-starters/file/blob/master/spring-cloud-starter-stream-source-file/README.adoc and deploying using Spring Cloud Dataflow dsl such as stream create file ----file.consumer.mode=lines --file.directory=/tmp/ | sink correct?

If so, there's a special header called sequence_number when you are reading files in the lines mode. You can add a filter in between to drop those messages based on a header expression.