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IPU Lamp Sample [message #1395157]

Sun, 06 July 2014 13:15

hady delabe

Messages: 5
Registered: July 2014

Junior Member

Hello everyone,
I just tested the sample provided with ipu.sample om2m project with my own client, in case the body of the request is empty all goes well:
By against when the body of the request is not empty I get an error:

Infos: ResponseConfirm [statusCode=STATUS_NOT_FOUND, representation=<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<om2m:errorInfo xmlns:om2m="..." xmlns:xmime=".../2005/05/xmlmime">
<om2m:statusCode>STATUS_NOT_FOUND</om2m:statusCode>
<om2m:additionalInfo>No IPU found for path APoCPath [path=lamps, accessRightID=gscl/accessRights/AR_ADMIN, searchStrings=null]</om2m:additionalInfo>
</om2m:errorInfo>
, resourceURI=null]
...RestHttpServlet service
Infos: HttpResponse [statusCode=404]

To understand the problem I am interested in InterworkingProxyController class and I noticed that in the case where the body of the request is not empty this is the
method doCreate is invoked and in this case the instance of the SampleController is null. I still do not understand why SampleController is null.

Thank's.

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Re: IPU Lamp Sample [message #1396474 is a reply to message #1395157]

Tue, 08 July 2014 10:52

Mahdi Ben Alaya

Messages: 229
Registered: November 2013

Senior Member

Hello,

This is an interesting question.
The ETSI M2M specification defines 5 methods to handle resources mapped to HTTP as follows:
Create->POST (with a non-empty body)
Retrieve->GET
Update->PUT
Delete->DELETE
Execute->POST (with an empty body)

The choice of the method type to use depends on your scenario, and in some cases you can perform the same scenario using two different methods.
For example, to switch ON/OFF a lamp you can:
- Use the Execute method (POST with an empty body) and add the required parameters (e.g. ON or OFF) in the URI. Your request will be routed to the doExecute() method of your controller. So you should implements the doExecute() method (This scenario is implemented for the ipu.sample).
- Use the Create method (POST with a non-empty body) an add the required parameters as XML representation in the body. You requested will be routed to the doCreate() method of your controller.

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