Hi all, I'm having problems calling a Spring autowired Repository from a task. The idea is to have the Service Task call one of the methods of a Service. Problem is, after executing the service task, I'm getting an "Unknown property in expression" if using a delegateExpression (similar to what's mentioned in this other thread), or a null pointer exception, as a result of the @Autowired Repository in myService not being properly instantiated). The Service Task is being run as
activiti:delegateExpression="${myBeanServiceImpl}")
My service bean is as follows:
@Service("myBeanServiceImpl")
public class MyBeanServiceImpl implements JavaDelegate {
@Autowired
private TestServiceDummy serviceDummy;
@Override
public void execute(DelegateExecution execution) {
serviceDummy.save(new User()); // <– NPE here, the userRepository is null when called. ie: not being properly autowired.
}
// Getters and Setters for the testServiceDummy omitted for brevity
}
Here's my TestServiceDummyImpl:
@Service(value="testServiceDummyImpl")
@Transactional(readOnly = true)
public class TestServiceDummyImpl implements TestServiceDymmy {
@Autowired
private UserRepository userRepository;
@Override
public User save(User user) {
userRepository.save(user);
}
// Getters && Setters for the repository
}
And a simple JPARepository from SpringData
public interface UserRepository extends JPARepository<User, Long> {
}
The same thing works without problems when called from our webapp (calling the service as a @ManagedProperty works ok) so the embedded project's config seems to be ok.And here's Activiti Explorer's applicationContext file:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:jpa="http://www.springframework.org/schema/data/jpa"
xmlns:jee="http://www.springframework.org/schema/jee"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.1.xsd
http://www.springframework.org/schema/data/jpa
http://www.springframework.org/schema/data/jpa/spring-jpa.xsd
http://www.springframework.org/schema/jdbc
http://www.springframework.org/schema/jdbc/spring-jdbc-3.1.xsd
http://www.springframework.org/schema/jee
http://www.springframework.org/schema/jee/spring-jee-3.1.xsd">
<context:property-placeholder location="classpath*:jdbc.properties" />
<!– Scan this classpath for annotated components that will be auto-registered
as Spring beans –>
<context:annotation-config />
<!– scan the embedded project's components –>
<context:component-scan base-package="edu.bedelias.*" />
<jpa:repositories base-package="edu.bedelias.repositories*" />
<bean
class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" />
<!– Automatically translate hibernate/jpa exceptions into Spring's generic
DataAccessException hierarchy for those classes annotated with Repository –>
<bean
class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor" />
<!– JPA Entity Manager Factory –>
<bean id="entityManagerFactory"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="jpaVendorAdapter" ref="hibernateJpaVendorAdapter" />
<property name="packagesToScan">
<list>
<value>edu.bedelias.*</value>
</list>
</property>
<property name="jpaProperties">
<props>
<!– set HibernateJpaVendorAdapter's behavior: 'create' = build a new
DB on each run; 'update' = modify an existing database; 'create-drop' = 'create'
and also drops tables when Hibernate closes; 'validate' = makes no changes
to the database –>
<prop key="hibernate.hbm2ddl.auto">create-drop</prop>
</props>
</property>
</bean>
<bean id="hibernateJpaVendorAdapter"
class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
<property name="showSql" value="true" />
<property name="generateDdl" value="false" />
<property name="databasePlatform" value="org.hibernate.dialect.MySQLDialect" />
</bean>
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
destroy-method="close">
<property name="driverClass" value="${jdbc.driverClass}" />
<property name="jdbcUrl" value="${jdbc.jdbcUrl}" />
<property name="user" value="${jdbc.user}" />
<property name="password" value="${jdbc.password}" />
<property name="maxPoolSize" value="${jdbc.maxPoolSize}" />
<property name="maxStatements" value="${jdbc.maxStatements}" />
<property name="minPoolSize" value="${jdbc.minPoolSize}" />
</bean>
<!– Transaction Manager is defined –>
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory" />
<property name="dataSource" ref="dataSource" />
</bean>
<!– Hijack the current @Session scope annotation on each @Service and make
it last only for the duration of the thread –>
<bean class="org.springframework.beans.factory.config.CustomScopeConfigurer">
<property name="scopes">
<map>
<entry key="session">
<bean class="org.springframework.context.support.SimpleThreadScope" />
</entry>
</map>
</property>
</bean>
<!– Enable the configuration of transactional behavior based on annotations –>
<tx:annotation-driven />
<bean id="dbProperties"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location" value="classpath:db.properties" />
<!– Allow other PropertyPlaceholderConfigurer to run as well –>
<property name="ignoreUnresolvablePlaceholders" value="true" />
</bean>
<bean id="demoDataGenerator" class="org.activiti.explorer.demo.DemoDataGenerator">
<property name="processEngine" ref="processEngine" />
</bean>
<bean id="processEngineConfiguration" class="org.activiti.spring.SpringProcessEngineConfiguration">
<property name="dataSource" ref="dataSource" />
<property name="transactionManager" ref="transactionManager" />
<property name="databaseSchemaUpdate" value="true" />
<property name="jobExecutorActivate" value="true" />
<property name="customFormTypes">
<list>
<ref bean="userFormType" />
</list>
</property>
</bean>
<bean id="processEngine" class="org.activiti.spring.ProcessEngineFactoryBean"
destroy-method="destroy">
<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="identityService" factory-bean="processEngine"
factory-method="getIdentityService" />
<bean id="activitiLoginHandler" class="org.activiti.explorer.ui.login.DefaultLoginHandler">
<property name="identityService" ref="identityService" />
</bean>
<!– Include the UI-related wiring. This UI context will be used in the
alfresco activiti admin UI –>
<import resource="activiti-ui-context.xml" />
<!– Custom form types –>
<bean id="userFormType" class="org.activiti.explorer.form.UserFormType" />
</beans>
I've tried going for an "Expression" approach, as suggested [url=http://forums.activiti.org/en/viewtopic.php?f=8&t=3276&p=13020]here and here to no avail.If anyone is curious, the URL of the project is here: http://code.google.com/p/tecnoinf-activiti/source/browse/Thanks in advance,Gaston
arseProcessEngineConfiguration to instantiate the spring context using DefaultListableBeanFactory. Because no ApplicationContext is used, the <code><context:annotation-config/></code> seems to be ignored.
