Unknown property used in expression: #{bookOrder.validates()}

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Active Member

Unknown property used in expression: #{bookOrder.validates()}

Hi everyone i tried CDI with Activiti but i keep getting this error :

Unknown property used in expression: #{bookOrder.validates()}

Caused by: org.activiti.engine.impl.javax.el.PropertyNotFoundException: Cannot resolve identifier 'bookOrder'

My BookOrder class : 

@Named("bookOrder")
public class BookOrder {

private static final long serialVersionUID = 1L;

private String isbn;
private boolean approved;

public String getIsbn() {
return isbn;
}
public void setIsbn(String isbn) {
this.isbn = isbn;
}
public boolean isApproved() {
return approved;
}
public void setApproved(boolean approved) {
this.approved = approved;
}


public void validates() {
System.out.println("Testing the CDI ...");
}


}

and the BPMN file :

<?xml version="1.0" encoding="UTF-8"?>
<definitions xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:activiti="http://activiti.org/bpmn" xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI" xmlnsSmiley Surprisedmgdc="http://www.omg.org/spec/DD/20100524/DC" xmlnsSmiley Surprisedmgdi="http://www.omg.org/spec/DD/20100524/DI" typeLanguage="http://www.w3.org/2001/XMLSchema" expressionLanguage="http://www.w3.org/1999/XPath" targetNamespace="http://www.activiti.org/test">
<process id="my-process" name="bookorder">
<startEvent id="startEvent" name="Start" activiti:formKey="taskForm_newOrder.jsf" />
<sequenceFlow id="toValidateTask" sourceRef="startEvent" targetRef="validateTask"/>
<serviceTask id="validateTask" activiti:expression="#{bookOrder.validates()}" />
<sequenceFlow id="toCompletedOrderTask" sourceRef="validateTask" targetRef="completeOrderTask"/>
<userTask id="completeOrderTask" name="Complete order" activiti:assignee="kermit" activiti:formKey="taskForm_completeOrder.jsf">
<documentation>Completing order for book with isbn </documentation>
</userTask>
<sequenceFlow id="toApproveTask" sourceRef="completeOrderTask" targetRef="approveTask"/>
<serviceTask id="approveTask" activiti:expression="#{bookOrder.validates()}" />
<sequenceFlow id="toEndEvent" sourceRef="approveTask" targetRef="endEvent"/>
<endEvent id="endEvent" name="End"/>
</process>
</definitions>

Any ideas what i'm doing Wrong here ??

2 Replies
Intermediate

Re: Unknown property used in expression: #{bookOrder.validates()}

What platform are you running on?

Active Member

Re: Unknown property used in expression: #{bookOrder.validates()}

I solved the problem i'm using spring with JSF i declared the beans in my activiti.cfg.xml , the problem i'm facing is that inside the validate method i have bookOrder.getIsbn when i call it it retrieves the value i want  but when processing it vial ServiceTask it always retrievs NullPointerException

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
">

<bean id="dataSource" class="org.springframework.jdbc.datasource.SimpleDriverDataSource">
<property name="jdbcUrl" value="jdbc:mysql://localhost:3306/activiti_test" />
<property name="jdbcDriver" value="com.mysql.jdbc.Driver" />
<property name="jdbcUsername" value="root" />
<property name="jdbcPassword" value=" " />
<property name="databaseSchemaUpdate" value="DB_SCHEMA_UPDATE_TRUE" />
</bean>

<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>

<bean id="processEngineConfiguration" class="org.activiti.engine.impl.cfg.StandaloneInMemProcessEngineConfiguration">
<property name="jdbcUrl" value="jdbc:h2:mem:activiti;DB_CLOSE_DELAY=1000" />
<property name="jdbcDriver" value="org.h2.Driver" />
<property name="jdbcUsername" value="sa" />
<property name="jdbcPassword" value="" />

<property name="databaseSchemaUpdate" value="true" />

<property name="jobExecutorActivate" value="false" />
<property name="asyncExecutorEnabled" value="true" />
<property name="asyncExecutorActivate" value="false" />

</bean>
<bean id="processEngine" class="org.activiti.spring.ProcessEngineFactoryBean">
<property name="processEngineConfiguration" ref="processEngineConfiguration"/>
</bean>

<bean id="repositoryService" factory-bean="processEngine"
factory-method="getRepositoryService"/>
<bean id="runtimeService" factory-bean="processEngine"
factory-method="getRuntimeService"/>
<bean id="taskService" factory-bean="processEngine"
factory-method="getTaskService"/>
<bean id="historyService" factory-bean="processEngine"
factory-method="getHistoryService"/>
<bean id="managementService" factory-bean="processEngine"
factory-method="getManagementService"/>

<bean id="bookOrder" class="ma.net.s2m.selectsystem.web.controller.admin.BookOrder"/>
<bean id="operationController" class="ma.net.s2m.selectsystem.web.controller.admin.OperationController"/>
<bean id="adminModele" class="ma.net.s2m.selectsystem.web.modele.AdminModele"/>
<bean id="moduleMenuItem" class="ma.net.s2m.selectsystem.domainmodel.admin.ModuleMenuItem"/>

</beans>