I was trying to query task by process instance id and that worked well, and then I set the Task to my own java class(Ticket, the code is below), that worked well either. But all things went wrong where I returned my java class to front-end(JSP).I got this Exception:Could not write content: lazy loading outside command context (through reference chain: com.chinamobile.epic.base.common.Response["entity"]->com.chinamobile.epic.nami.model.ComplaintTicket["task"]->org.activiti.engine.impl.persistence.entity.TaskEntity["variableInstances"]); nested exception is com.fasterxml.jackson.databind.JsonMappingException: lazy loading outside command context (through reference chain: com.chinamobile.epic.base.common.Response["entity"]->com.chinamobile.epic.nami.model.ComplaintTicket["task"]->org.activiti.engine.impl.persistence.entity.TaskEntity["variableInstances"])I am using SpringMVC and this is my controller:
@RequestMapping(value = "/tickets/{ticketId}", method = RequestMethod.GET)
public Response getTicketDetail(@PathVariable String ticketId) {
Ticket ticket;
ticket = baseTicketService.getDetailByTicketId(ticketId);
return Response.success(ticket);
}
and this is my Service:
public Ticket getDetailByTicketId(String ticket_id){
String resultTicket = new Ticket();
//set some other members here
Task task = taskService.createTaskQuery().processInstanceId(resultTicket.getProcessInstanceId()).active()
.singleResult();
if (task != null) {
resultTicket.setTask(task);
}
}
And this is the Ticket class:
import org.activiti.engine.task.Task;
public class Ticket {
private Task task;
//and there are some other members
public void setTask(Task task) {
this.task = task;
}
public void setTask(Task task) {
this.task = task;
}
}
I do want to deliver the information of Task to the front-end.Is there some solutions for this Exception? I really appreciate it if someone can help me…Thanks…
