Can we use single FIle/FTP adapter to poll multiple directory

I have come across this question in one of the blog.Some one was asking if we can use a single file adapter to poll multiple directory.

Technically it is possible but to implement it needs a lot of background works to be done.

When ever we create a file adapter it is assigned to one activation agent,one activation agent can process one request at a time so basically we need to write our own custom code for a activation agent.It required a java class file that need to be present in the SOA_HOME\bpel\system\classes directory and again

we need to make the entry in our bpel.xml for that particular activation agent pointing to some other directory

<activationAgents>
<activationAgent className="oracle.tip.adapter.fw.agent.jca.JCAActivationAgent" partnerLink="File1">
<property name="portType">Read_ptt</property>
<property name="D:\folder1" type="PhysicalDirectory"></property>
</activationAgent>
<activationAgent className="YOur activation agent" partnerLink="File1">
<property name="portType">Read_ptt</property>
<property name="D:\folder2" type="PhysicalDirectory"></property>
</activationAgent>
<activationAgent className="Your activation agent" partnerLink="File1">
<property name="portType">Read_ptt</property>
<property name="D:\folder3" type="PhysicalDirectory"></property>
</activationAgent>
</activationAgents>

Here you are using a single File adapter File1 but using three activation agent to poll three different directory.

I have not tested this my self and there is not guarantee that it should work it is just my view that it should work in such a way.Seeking other's input if my concept is correct.

SOA Suite best practice guide suggest on how to create an activation agent.