WSO2 Integrator 6, File inbound Protocol process code - wso2

Question

Currently working for a company on wso2 integrator, I need to retrieve files periodically created into a directory so that they can be processed, modified and sent to a remote API.
The problem is that we need to use wso2 exclusively and absolutely can't code side programs to adapt to the situation. We can use script though only if they are embedded within wso2.
Does someone have a clue?

Answer 1

This is a simple synapse configuration that:
Wait for incoming CSV files on a given directory
Convert its contents to XML
Do some transformation on its elements
Sends the result to a another endpoint (an output directory in this case)
I hope it helps to get you going (comments inline):
<?xml version="1.0" encoding="UTF-8"?>
<definitions xmlns="http://ws.apache.org/ns/synapse">
<!-- ======================================== -->
<!-- Smooks configuration to parse sample CSV -->
<!-- ======================================== -->
<localEntry key="smooks-orders-csv">
<smooks-resource-list
xmlns="http://www.milyn.org/xsd/smooks-1.1.xsd" xmlns:csv="http://www.milyn.org/xsd/smooks/csv-1.2.xsd">
<resource-config selector="org.xml.sax.driver">
<resource>org.milyn.csv.CSVReader</resource>
<param name="fields">OrderId,SKU,Quantity,UnitPrice,TotalPrice</param>
<param name="skip-line-count">1</param> <!-- Skip Header line -->
<param name="rootElementName">orders</param>
<param name="recordElementName">order</param>
</resource-config>
</smooks-resource-list>
</localEntry>
<!-- ====================================================== -->
<!-- XML processing logic: Replaces SKU number 0002 to 0003 -->
<!-- ====================================================== -->
<localEntry key="change-sku">
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="#*|node()">
<xsl:copy>
<xsl:apply-templates select="#*|node()"/>
</xsl:copy>
</xsl:template>
<xsl:template match="SKU/text()[.='0002']">0003</xsl:template>
</xsl:stylesheet>
<description/>
</localEntry>
<!-- *********************** -->
<!-- Process Orders sequence -->
<!-- *********************** -->
<sequence name="process_orders" onError="fault" statistics="enable" trace="enable">
<!-- Convert incoming file into a stream of orders -->
<smooks config-key="smooks-orders-csv">
<input type="text"/>
<output type="xml"/>
</smooks>
<!-- General Synapse properties that must be set for a One-Way exchange pattern -->
<property name="FORCE_SC_ACCEPTED" scope="axis2" value="true"/>
<property name="OUT_ONLY" value="true"/>
<!-- VFS send will fail unless you remove this property -->
<property action="remove" name="ClientApiNonBlocking" scope="axis2"/>
<!-- The "magic" property 'transport.vfs.ReplyFileName' is used by the VFS transport to define output file name
when the specified URI is a directory
-->
<property
expression="fn:concat(fn:substring-after(get-property('MessageID'), 'urn:uuid:'), '.xml')"
name="transport.vfs.ReplyFileName" scope="transport" xmlns:ns="http://org.apache.synapse/xsd"/>
<!-- Create output file -->
<send>
<endpoint>
<address format="pox" uri="vfs:file:///mnt/c/transfer/out"/>
</endpoint>
</send>
</sequence>
<!-- Inbound polling endpoint -->
<inboundEndpoint name="received_orders" onError="fault"
protocol="file" sequence="process_orders" suspend="false">
<parameters>
<parameter name="interval">1000</parameter>
<parameter name="sequential">true</parameter>
<parameter name="coordination">true</parameter>
<!-- Input directory -->
<parameter name="transport.vfs.FileURI">file:///mnt/c/transfer/in</parameter>
<!-- CSV files are plain text messages -->
<parameter name="transport.vfs.ContentType">text/plain</parameter>
<!-- RegExp used to filter files in input directory -->
<parameter name="transport.vfs.FileNamePattern">.*\.txt</parameter>
<parameter name="transport.vfs.Locking">disable</parameter>
<!-- Move processed files to the 'processed' subdirectory -->
<parameter name="transport.vfs.ActionAfterProcess">MOVE</parameter>
<parameter name="transport.vfs.MoveAfterProcess">file:///mnt/c/transfer/in/processed</parameter>
<!-- Move failed files to the 'rejected subdirectory -->
<parameter name="transport.vfs.ActionAfterFailure">MOVE</parameter>
<parameter name="transport.vfs.MoveAfterFailure">file:///mnt/c/transfer/in/rejected</parameter>
<parameter name="transport.vfs.AutoLockRelease">true</parameter>
<parameter name="transport.vfs.LockReleaseSameNode">false</parameter>
<parameter name="transport.vfs.DistributedLock">false</parameter>
<parameter name="transport.vfs.FileSortAttribute">NONE</parameter>
<parameter name="transport.vfs.FileSortAscending">true</parameter>
<parameter name="transport.vfs.CreateFolder">true</parameter>
<parameter name="transport.vfs.Streaming">false</parameter>
<parameter name="transport.vfs.Build">false</parameter>
</parameters>
</inboundEndpoint>
</definitions>