topic Re: Process Instance Diagram through Restful API in Alfresco Archive

Process Instance Diagram through Restful API

pneudecorb — Mon, 27 Aug 2012 16:00:26 GMT

I am trying to retrieve the process instance (not definition) diagram using the restful API, but I am not getting all the byte data back from the activiti calls.My initial definition deployment consisted only of the definition (bpmn 2.0 xml) with no process definition image data.I assume (please cor

Re: Process Instance Diagram through Restful API

pneudecorb — Mon, 27 Aug 2012 18:40:42 GMT

One additional piece of information is that these bpmn 2.0 xml definitions are generated by Joram's kickstart code, so they may not have enough or even valid "diagram interchange" information that would allow activiti to generate the diagrams at deployment if they are not provided.

Re: Process Instance Diagram through Restful API

potgieterde — Fri, 28 Sep 2012 13:03:21 GMT

Any luck with this?

As far as i can see i get the image back calling uri :


        String subUrl = "/process-instance/" + processInstanceId + "/diagram";
        Reference reference = new Reference(Play.configuration.getProperty("activiti.rest.url") + subUrl);
        Client client = new Client(Protocol.HTTP);
        Request request = new Request(Method.GET, reference);
        request.setChallengeResponse(new ChallengeResponse(ChallengeScheme.HTTP_BASIC, "kermit", "kermit"));

        Response response = client.handle(request);
        Logger.debug("type : " + response.getEntity().getMediaType().getName());

but i cant seem to figure out how to read the image in byte[] form.
the debug statement returns "image/png" and calling response.getEntityAsText() returns a whole lot of printed binary.

Any help would be appreciated.

Re: Process Instance Diagram through Restful API

potgieterde — Fri, 28 Sep 2012 13:05:44 GMT

Any luck with this?

As far as i can see i get the image back calling uri :


        String subUrl = "/process-instance/" + processInstanceId + "/diagram";
        Reference reference = new Reference(Play.configuration.getProperty("activiti.rest.url") + subUrl);
        Client client = new Client(Protocol.HTTP);
        Request request = new Request(Method.GET, reference);
        request.setChallengeResponse(new ChallengeResponse(ChallengeScheme.HTTP_BASIC, "kermit", "kermit"));

        Response response = client.handle(request);
        Logger.debug("type : " + response.getEntity().getMediaType().getName());

Re: Process Instance Diagram through Restful API

frederikherema1 — Fri, 28 Sep 2012 13:16:23 GMT

Don't read it as text, just read the response-entity stream. Use the getEntity().getContent() inputsream. Make sure you sue the right encoding…