ActivitiException: Did not assign the operation parameters

[minalghorpade]

Hi …
   I am using ACTIVITI 5.12.1 .  I want to use assign task rest service in  my project. I am using restTemplate.exchange method  to call this rest service .
But somthing is going wrong.  RestTemplate is not working for put method . I am getting nullpointerException.
error stackTrace is as follows.

Please help me . I have searched on forum but didn't get solution .

Thank you
Minal


Exception or error caught in resource
org.activiti.engine.ActivitiException: Did not assign the operation parameters
   at org.activiti.rest.api.task.TaskOperationResource.executeTaskOperation(TaskOperationResource.java:80)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
   at java.lang.reflect.Method.invoke(Method.java:597)
   at org.restlet.resource.ServerResource.doHandle(ServerResource.java:449)
   at org.restlet.resource.ServerResource.put(ServerResource.java:1173)
   at org.restlet.resource.ServerResource.doHandle(ServerResource.java:524)
   at org.restlet.resource.ServerResource.doNegotiatedHandle(ServerResource.java:590)
   at org.restlet.resource.ServerResource.doConditionalHandle(ServerResource.java:302)
   at org.restlet.resource.ServerResource.handle(ServerResource.java:849)
   at org.restlet.resource.Finder.handle(Finder.java:513)
   at org.restlet.routing.Filter.doHandle(Filter.java:159)
   at org.restlet.routing.Filter.handle(Filter.java:206)
   at org.restlet.routing.Router.doHandle(Router.java:500)
   at org.restlet.routing.Router.handle(Router.java:740)
   at org.restlet.routing.Filter.doHandle(Filter.java:159)
   at org.restlet.routing.Filter.handle(Filter.java:206)
   at org.restlet.routing.Filter.doHandle(Filter.java:159)
   at org.restlet.routing.Filter.handle(Filter.java:206)
   at org.restlet.routing.Filter.doHandle(Filter.java:159)
   at org.restlet.routing.Filter.handle(Filter.java:206)
   at org.restlet.routing.Filter.doHandle(Filter.java:159)
   at org.restlet.routing.Filter.handle(Filter.java:206)
   at org.restlet.routing.Filter.doHandle(Filter.java:159)
   at org.restlet.engine.application.StatusFilter.doHandle(StatusFilter.java:155)
   at org.restlet.routing.Filter.handle(Filter.java:206)
   at org.restlet.routing.Filter.doHandle(Filter.java:159)
   at org.restlet.routing.Filter.handle(Filter.java:206)
   at org.restlet.engine.ChainHelper.handle(ChainHelper.java:114)
   at org.restlet.engine.application.ApplicationHelper.handle(ApplicationHelper.java:75)
   at org.restlet.Application.handle(Application.java:391)
   at org.restlet.routing.Filter.doHandle(Filter.java:159)
   at org.restlet.routing.Filter.handle(Filter.java:206)
   at org.restlet.routing.Router.doHandle(Router.java:500)
   at org.restlet.routing.Router.handle(Router.java:740)
   at org.restlet.routing.Filter.doHandle(Filter.java:159)
   at org.restlet.routing.Filter.handle(Filter.java:206)
   at org.restlet.routing.Router.doHandle(Router.java:500)
   at org.restlet.routing.Router.handle(Router.java:740)
   at org.restlet.routing.Filter.doHandle(Filter.java:159)
   at org.restlet.routing.Filter.handle(Filter.java:206)
   at org.restlet.engine.ChainHelper.handle(ChainHelper.java:114)
   at org.restlet.Component.handle(Component.java:391)
   at org.restlet.Server.handle(Server.java:491)
   at org.restlet.engine.ServerHelper.handle(ServerHelper.java:74)
   at org.restlet.engine.http.HttpServerHelper.handle(HttpServerHelper.java:153)
   at org.restlet.ext.servlet.ServerServlet.service(ServerServlet.java:1031)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
   at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
   at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
   at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
   at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
   at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
   at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
   at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
   at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
   at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
   at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.NullPointerException
   at org.activiti.rest.api.task.TaskOperationResource.executeTaskOperation(TaskOperationResource.java:76)
   … 60 more

[jbarrez]

> org.activiti.engine.ActivitiException: Did not assign the operation parameters

The exception is pretty clear: you're trying to do a task operation (claim, complete, etc) but haven't provided the actual operation.

[minalghorpade]

Hi..
Thank you for reply 🙂 .
As mention above I am doing assign task operation , for which I am using this url :- http://localhost:8081/activiti-rest/service/task/713/assign
(713 is task id) .  and provideing payload for userId as follows

{
      "userId": "kermit"
}

still not getting result. Please help where I am going wrong.

[frederikherema1]


} else if ("assign".equals(operation)) {
      String userId = null;
      try {
        String startParams = entity.getText();
        JsonNode startJSON = new ObjectMapper().readTree(startParams);
        userId = startJSON.path("userId").getTextValue();
      } catch(Exception e) {
        throw new ActivitiException("Did not assign the operation parameters", e);
      }
      ActivitiUtil.getTaskService().setAssignee(taskId, userId);

Are you still seeing the same exception message? Shouldn't be thrown when userId is present in JSON body.

[minalghorpade]

Hi…
  I found solution. The problem was with REST TEMPLATE's PUT method. I am using rest templates.exchange method to call this service .
PUT methos does not accept custom object dirctly . We need to add request body in HTTPHeader.
Later on I found this solution while searching .

Thanks
Minal