Hi,I have taken ui-mediator example from below link.http://www.bpm-guide.de/2012/04/04/pageflow-vs-process-flow-and-ui-mediator-pattern/While creating the the ProcessInstance through BusinessProcess i am getting NullPointerException.My code is like Below.
package com.rolta.onv.ui.customerregistration;
import java.util.HashMap;
import java.util.Map;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.ManagedProperty;
import javax.faces.bean.RequestScoped;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import org.activiti.cdi.BusinessProcess;
import org.activiti.engine.runtime.ProcessInstance;
import org.apache.log4j.Logger;
import com.rolta.onv.ui.util.CustomerUtil;
@ManagedBean(name="customerService")
@RequestScoped
public class CustomerService {
private static Logger sLog = Logger.getLogger(CustomerService.class.getName());
public static final String VARNAME_CUSTOMER_ID = "customerId";
public static final String PROCESS_KEY = "uimediator";
private static EntityManagerFactory factory = Persistence.createEntityManagerFactory("Worksample");
EntityManager entityManager= factory.createEntityManager();
private BusinessProcess businessProcess;
private CustomerEO customer;
@ManagedProperty(value="#{customerUtil}")
private CustomerUtil customerUtil;
public CustomerEO getCustomer()
{
if(customer==null)
{
Long customerId = businessProcess.getVariable(VARNAME_CUSTOMER_ID);
customer = entityManager.find(CustomerEO.class, customerId);
}
return customer;
}
public CustomerEO getNewOrder() {
if (customer == null) {
customer = new CustomerEO();
}
return customer;
}
public CustomerService() {
}
public CustomerUtil getCustomerUtil() {
return customerUtil;
}
public void setCustomerUtil(CustomerUtil customerUtil) {
this.customerUtil = customerUtil;
}
public ProcessInstance startCustomerRegistration() {
if (customer == null) {
customer = new CustomerEO();
}
entityManager.getTransaction().begin();
customer.setFirstname(customerUtil.getUserName());
customer.setLastname(customerUtil.getLastName());
entityManager.persist(customer);
Map<String, Object> variables = new HashMap<String, Object>();
variables.put(VARNAME_CUSTOMER_ID, customer.getId());
this.customer = null;
entityManager.getTransaction().commit();
System.out.println("variables—————"+variables);
return businessProcess.startProcessByKey(PROCESS_KEY, variables);
}
}
Please tell me how to ProcessInstance from BusinessProcess.
