rest api to start a process instance is holding request untill process instance is complete

[mansoor]

i am using activiti version 6.

i created a bpmn process from activiti-app

then i want to strart that process from activiti-rest.war using the api

http://localhost:8080/activiti-rest/service/runtime/process-instances‍‍‍‍‍

request body :

 {
      
   "processDefinitionKey":"cep_dispatch_process",
   "businessKey":"myBusinessKey",
     "returnVariables": false
}

header :
Content-Type:application/json‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

as i see in the LOG process is being started in tomcat threads.

refering latest github code:

Activiti-activiti-6.0.0\modules\activiti-rest\src\main\java\org\activiti\rest\service\api\runtime\process\ProcessInstanceCollectionResource.java

when i see method

@RequestMapping(value = "/runtime/process-instances", method = RequestMethod.POST, produces = "application/json")
  public ProcessInstanceResponse createProcessInstance(@RequestBody ProcessInstanceCreateRequest request, HttpServletRequest httpRequest, HttpServletResponse response) {‍‍‍‍‍‍‍‍

 i can see process is being started  and not waiting for process to complete , http response is 201. i can understand request is not being hold for process instance to complete

 instance = processInstanceBuilder.start();

 response.setStatus(HttpStatus.CREATED.value());‍‍‍‍‍‍‍‍‍‍‍‍

please refer the log snipped below, i can see process is executing in server thread and request is waiting till process completed

276-DEBUG 17-01-2019 14:12:07,177- (http-nio-8080-exec-3) ExecutionEntityManagerImpl: Child execution Execution[ id '130023' ] - parent '130021' created with parent 130021
241-DEBUG 17-01-2019 14:12:07,178- (http-nio-8080-exec-3) ContinueProcessOperation: Executing boundary event activityBehavior class org.activiti.engine.impl.bpmn.behavior.BoundaryTimerEventActivityBehavior with execution 130023
171-DEBUG 17-01-2019 14:12:07,202- (http-nio-8080-exec-3) ContinueProcessOperation: Executing activityBehavior class org.activiti.engine.impl.bpmn.behavior.SubProcessActivityBehavior on activity 'sid-1A2A8DF5-764A-4960-8E5D-F347DC10207C' with execution 130021
276-DEBUG 17-01-2019 14:12:07,203- (http-nio-8080-exec-3) ExecutionEntityManagerImpl: Child execution Execution[ id '130025' ] - parent '130021' created with parent 130021
63-DEBUG 17-01-2019 14:12:07,203- (http-nio-8080-exec-3) DefaultActivitiEngineAgenda: Operation class org.activiti.engine.impl.agenda.ContinueProcessOperation added to agenda
70-DEBUG 17-01-2019 14:12:07,203- (http-nio-8080-exec-3) CommandInvoker: Executing operation class org.activiti.engine.impl.agenda.ContinueProcessOperation ‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Please help request must not wait for process to complete .

how can i solve this, request to start the process must not wait for process-instance to complete.

as you see in the response below:

{
"id":"130028",
"url":"http://localhost:8080/activiti-rest/service/runtime/process-instances/130028",
"businessKey":"myBusinessKey",
"suspended":false,
"ended":true,
"processDefinitionId":"cep_dispatch_process:13:125033",
"processDefinitionUrl":"http://localhost:8080/activiti-rest/service/repository/process-definitions/cep_dispatch_process:13:125033",
"processDefinitionKey":"cep_dispatch_process",
"activityId":null,
"variables":[],
"tenantId":"",
"name":null,
"completed":true
}‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

api is returning only after process completes, i add delay of 2 min in service task , i can see request will be waiting. please help

[mansoor · Accepted solution]

Hello Community

[juanh]

Sorry, but I'm afraid that I'm not able to see the solution.

[juanh]

Service tasks are synchronous as default. Try marking your service task as asynchronous to get an immediate response in the REST call.