topic Create Process Instance Rest API Exception in Alfresco Archive

Create Process Instance Rest API Exception

kartikmavani — Fri, 24 Oct 2014 21:04:44 GMT

Hello, Greeting !.I am writing a restful API for starting a process instance. I am using springTemplate.The following is the code. private static String HOST = "localhost"; private static String PORT = "8080"; private static String PROTOCOL = "http"; public static String BASE_URL = PROT

Re: Create Process Instance Rest API Exception

jbarrez — Mon, 27 Oct 2014 11:22:38 GMT

which Activiti version is this? Can't see anything that could cause this in the current code

Re: Create Process Instance Rest API Exception

kartikmavani — Tue, 28 Oct 2014 14:49:25 GMT

Sorry for the delayed response.
I am using activiti 5.14.

Re: Create Process Instance Rest API Exception

jbarrez — Fri, 31 Oct 2014 15:11:08 GMT

So this is the failing line: https://github.com/Activiti/Activiti/blob/activiti-5.14/modules/activiti-rest/src/main/java/org/activiti/rest/service/api/runtime/process/ProcessInstanceCollectionResource.java#L100

From that code, it seems only the NPE can happen is the request is null. I guess that only can happen if the json posted to the server is not correct.

Re: Create Process Instance Rest API Exception

kartikmavani — Fri, 31 Oct 2014 16:06:06 GMT

Got it.
Changed it from
URI uri = restTemplate.postForLocation(BASE_URL+"service/runtime/process-instances", null ,mainParams);

to

URI uri = restTemplate.postForLocation(BASE_URL+"service/runtime/process-instances", mainParams ,mainParams);

Thanks

Re: Create Process Instance Rest API Exception

jbarrez — Mon, 03 Nov 2014 10:13:25 GMT

That would explain it 🙂 thanks for posting back your solution.