Created question in FIWARE Q/A platform on 13-05-2016 at 13:05
Please, ANSWER this question AT http://stackoverflow.com/questions/37208354/how-to-configure-cepheus-cep-so-it-returns-json-to-orion-instead-of-xml

Question:
How to configure Cepheus CEP so it returns json to orion instead of xml?

Description:
Recently I started using Cepheus CEP but following the documentation I can't make it insert in orion entities. Looking what I made wrong with the accumulator.py I found out that cepheus cep sends xml querys to orion. Isn't xml deprecated in orion?

The configuration used in cepheus cep:

{
"host":"http://localhost:1028",
"in":[
{
"id":"Room.*",
"type":"Room",
"isPattern":true,
"providers":[
"http://localhost:1027"
],
"attributes":[

,

]
}
],
"out":[
{
"id":"Floor1",
"type":"Floor",
"brokers":[

],
"attributes":[

]
}
],
"statements":[
"INSERT INTO Floor SELECT floor as id, avg(temperature) as temperature FROM Room.win:time(10 min) GROUP BY floor OUTPUT LAST EVERY 10 sec"
]
}

1029 Orion Broker
1028 Cepheus CEP
1027 Cepheus Broker

The response I'm getting with accumulator.py:

127.0.0.1 - - [13/May/2016 05:50:46] "POST /ngsi10/updateContext HTTP/1.1" 200 -
POST http://localhost:1029/ngsi10/updateContext
Content-Length: 404
User-Agent: Apache-HttpAsyncClient/4.1 (Java/1.8.0_91)
Connection: Keep-Alive
Host: localhost:1029
Accept: application/xml
Content-Type: application/xml

<updateContextRequest><updateAction>APPEND</updateAction><contextElementList><contextElement><entityId type="Floor" isPattern="false"><id>Floor1</id></entityId><contextAttributeList><contextAttribute><name>temperature</name><type>double</type><contextValue>22.333333333333332</contextValue><metadata/></contextAttribute></contextAttributeList></contextElement></contextElementList></updateContextRequest>=======================================

And if in Cepheus Broker if I enabled

remote.forward.updateContext = true

with the correct broker config I get the following error:

2016-05-13 06:07:08.504 WARN 12977 — [nio-1027-exec-8] c.o.c.broker.controller.NgsiController : UpdateContext failed for http://localhost:1026: org.springframework.web.client.HttpClientErrorException: 415 Unsupported Media Type

I think this error is also produced because the xml format of the querys.