HISE

HISE stands for Human Interactions Service Engine.I have recently posted a proposal, which was accepted by Apache ODE PMC, which means the development will start soon.If you are interested in this project, you are welcome to join us.HISE stands for Human Interactions Service Engine.I have recently posted a proposal, which was accepted by Apache ODE PMC, which means the development will start soon.If you are interested in this project, you are welcome to join us.

HISE stands for Human Interactions Service Engine.
I have recently posted a proposal, which was accepted by Apache ODE PMC, which means the development will start soon.

If you are interested in this project, you are welcome to join us.

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Grails render as JSON catch

One of a reasons your controller doesn't render a proper response in JSON format might be wrong package name that you use. It is easy to overlook. Import are on top of a file, you look at your code and everything seems to be fine. Except response is still not in JSON format.

Consider this simple controller:

class RestJsonCatchController {
def grailsJson() {
render([first: 'foo', second: 5] as grails.converters.JSON)
}

def netSfJson() {
render([first: 'foo', second: 5] as net.sf.json.JSON)
}
}

And now, with finger crossed... We have a winner!

$ curl localhost:8080/example/restJsonCatch/grailsJson
{"first":"foo","second":5}
$ curl localhost:8080/example/restJsonCatch/netSfJson
{first=foo, second=5}

As you can see only grails.converters.JSON converts your response to JSON format. There is no such converter for net.sf.json.JSON, so Grails has no converter to apply and it renders Map normally.

Conclusion: always carefully look at your imports if you're working with JSON in Grails!

Edit: Burt suggested that this is a bug. I've submitted JIRA issue here: GRAILS-9622 render as class that is not a codec should throw exception