Looks like there are a few more differences between Sun Rhino (Java 7) and
Nashorn (Java 8) than I thought. For your importClass statements above,
those shouldn't be in quotes. Also I couldn't get the one-method interface
override to work even though the doc says it should, so I used an anonymous
class with 'process' mapped to the function.
I will update the post or add a new one soon; in the meantime, here's a
Java 7 version of the script I got working:
importClass(org.apache.commons.io.IOUtils)
importClass(java.nio.charset.StandardCharsets)
importClass(org.apache.nifi.processor.io.StreamCallback)
var flowFile = session.get();
if (flowFile != null) {
flowFile = session.write(flowFile,
new StreamCallback() {process : function(inputStream, outputStream)
{
var text = IOUtils.toString(inputStream, StandardCharsets.UTF_8)
var obj = JSON.parse(text)
var newObj = {
"Range": 5,
"Rating": obj.rating.primary.value,
"SecondaryRatings": {}
}
for(var key in obj.rating){
var attrName = key;
var attrValue = obj.rating[key];
if(attrName != "primary") {
newObj.SecondaryRatings[attrName] = {"id": attrName, "Range": 5, "Value":
attrValue.value};
}
}
outputStream.write(new java.lang.String(JSON.stringify(newObj, null,
'\t')).getBytes(StandardCharsets.UTF_8))
}})
flowFile = session.putAttribute(flowFile, "filename",
flowFile.getAttribute('filename').split('.')[0]+'_translated.json')
session.transfer(flowFile, REL_SUCCESS)
}
Regards,
Matt
On Mon, Mar 7, 2016 at 12:05 PM, Mike Harding <mikeyhard...@gmail.com>
wrote:
> Just wondering as importClass fails if I do the following.
>
> importClass("org.apache.nifi.processor.io.StreamCallback");
> importClass("org.apache.commons.io.IOUtils");
> importClass("java.nio.charset.StandardCharsets");
>
>
> Apologies for all the questions - I've never tried to include Java classes
> in a script before.
>
>
>
> On 7 March 2016 at 17:03, Mike Harding <mikeyhard...@gmail.com> wrote:
>
>> aaa ok cool. Given that org.apache.nifi.processor.io.StreamCallback is
>> an interface do I need to include the underlying classes?
>>
>> On 7 March 2016 at 16:29, Matt Burgess <mattyb...@gmail.com> wrote:
>>
>>> Looks like on Rhino you need a different syntax to import stuff:
>>> http://docs.oracle.com/javase/7/docs/technotes/guides/scripting/programmer_guide/#jsengine
>>>
>>> On Mon, Mar 7, 2016 at 11:26 AM, Matt Burgess <mattyb...@gmail.com>
>>> wrote:
>>>
>>>> So that's weird since you're running NiFi on Java already and trying to
>>>> use JavaScript. What version of Java are you using? I wonder if the
>>>> Java.type() thing is new in Java 8's Nashorn.
>>>>
>>>> Sent from my iPhone
>>>>
>>>> On Mar 7, 2016, at 11:22 AM, Mike Harding <mikeyhard...@gmail.com>
>>>> wrote:
>>>>
>>>> Hi Matt,
>>>>
>>>> Thanks for doing this - I've just tried to run the template and I get
>>>> the reference error: "Java" is not defined. I have JAVA_HOME set on my
>>>> ubuntu machine - just wondering if theres a new config setting I'm missing
>>>> perhaps?
>>>>
>>>> Mike
>>>>
>>>> On 2 March 2016 at 21:40, Matt Burgess <mattyb...@gmail.com> wrote:
>>>>
>>>>> Ask and ye shall receive ;) I realize most of my examples are in
>>>>> Groovy so it was a good idea to do some non-trivial stuff in another
>>>>> language, thanks for the suggestion!
>>>>>
>>>>> I recreated the JSON-to-JSON template but with Javascript as the
>>>>> language:
>>>>> http://funnifi.blogspot.com/2016/03/executescript-json-to-json-revisited.html
>>>>>
>>>>> Regards,
>>>>> Matt
>>>>>
>>>>> On Wed, Mar 2, 2016 at 10:52 AM, Mike Harding <mikeyhard...@gmail.com>
>>>>> wrote:
>>>>>
>>>>>> Hi Matt,
>>>>>>
>>>>>> Do you know if there is documentation that describes the
>>>>>> ExecuteScript JavaScript API at the moment ? Just as a practical example
>>>>>> how would I translate the Groovy code sample you walk through in this
>>>>>> post
>>>>>> >
>>>>>> http://funnifi.blogspot.co.uk/2016/02/executescript-json-to-json-conversion.html
>>>>>>
>>>>>> Thanks,
>>>>>> M
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> On 1 March 2016 at 18:32, Mike Harding <mikeyhard...@gmail.com>
>>>>>> wrote:
>>>>>>
>>>>>>> Hi Matt,
>>>>>>>
>>>>>>> That's exactly what I'm looking for - much appreciated !
>>>>>>>
>>>>>>> Thanks,
>>>>>>> Mike
>>>>>>>
>>>>>>> On Tue, 1 Mar 2016 at 18:13, Matt Burgess <mattyb...@gmail.com>
>>>>>>> wrote:
>>>>>>>
>>>>>>>> Mike,
>>>>>>>>
>>>>>>>> I have a blog containing a few posts on how to use ExecuteScript
>>>>>>>> and InvokeScriptedProcessor: http://funnifi.blogspot.com
>>>>>>>>
>>>>>>>> One contains an example using Javascript to get data from Hazelcast
>>>>>>>> and update flowfile attributes:
>>>>>>>> http://funnifi.blogspot.com/2016/02/executescript-using-modules.html
>>>>>>>>
>>>>>>>> If you'd like to share what you'd like to do with ExecuteScript,
>>>>>>>> I'd be happy to help you get going!
>>>>>>>>
>>>>>>>> Regards,
>>>>>>>> Matt
>>>>>>>>
>>>>>>>> On Tue, Mar 1, 2016 at 11:53 AM, Mike Harding <
>>>>>>>> mikeyhard...@gmail.com> wrote:
>>>>>>>>
>>>>>>>>> Hi,
>>>>>>>>>
>>>>>>>>> I'd like to utilise the ExecuteScript processor but I understand
>>>>>>>>> that its experimental. Can anyone point me in the direction of an
>>>>>>>>> example
>>>>>>>>> or tutorial preferably using Javascript on how to get started with it?
>>>>>>>>>
>>>>>>>>> Thanks,
>>>>>>>>> Mike
>>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>
>>>>>
>>>>
>>>
>>
>
