[英]Annotation based Spring Activiti ProcessEngine
我是Spring和Activiti的新手。 我正在使用嵌入式Activiti引擎開發基於注釋的Spring Web應用程序。 我實現了一些服務,SubscriptionService是其中之一。 在一個過程中,我使用以下命令將服務稱為bean:
activiti:expression="${subscriptionService.getContacts(publisherCode, contactType)}"
服務:
@Service
@Transactional
public class DBSubscriptionService implements SubscriptionService {
...
}
我將測試模塊和Web模塊分開。 測試模塊使用以下命令從activiti.cfg.xml加載上下文
@ContextConfiguration("classpath:activiti.cfg.xml")
它是:
<bean id="processEngineConfiguration"
class="org.activiti.engine.impl.cfg.StandaloneInMemProcessEngineConfiguration">
<property name="databaseType" value="h2" />
<property name="databaseSchemaUpdate" value="true" />
<property name="jobExecutorActivate" value="false" />
<property name="history" value="full" />
<property name="mailServerPort" value="2025" />
</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="identityService" factory-bean="processEngine"
factory-method="getIdentityService" />
<bean id="formService" factory-bean="processEngine"
factory-method="getFormService" />
<context:component-scan base-package="cz.muni.fi.cep" />
<context:annotation-config />
在測試模塊中,一切正常。 但是在Web模塊中,當它應該調用subscriptionService Bean時會拋出:
Unknown property used in expression: ${subscriptionService.getContacts(publisherCode, contactType)}
Caused by: org.activiti.engine.impl.javax.el.PropertyNotFoundException: Cannot resolve identifier 'subscriptionService'
at org.activiti.engine.impl.juel.AstIdentifier.eval(AstIdentifier.java:83)
at org.activiti.engine.impl.juel.AstMethod.invoke(AstMethod.java:79)
at org.activiti.engine.impl.juel.AstMethod.eval(AstMethod.java:75)
at org.activiti.engine.impl.juel.AstEval.eval(AstEval.java:50)
at org.activiti.engine.impl.juel.AstNode.getValue(AstNode.java:26)
at org.activiti.engine.impl.juel.TreeValueExpression.getValue(TreeValueExpression.java:114)
at org.activiti.engine.impl.delegate.ExpressionGetInvocation.invoke(ExpressionGetInvocation.java:33)
at org.activiti.engine.impl.delegate.DelegateInvocation.proceed(DelegateInvocation.java:37)
at org.activiti.engine.impl.delegate.DefaultDelegateInterceptor.handleInvocation(DefaultDelegateInterceptor.java:25)
at org.activiti.engine.impl.el.JuelExpression.getValue(JuelExpression.java:48)
... 363 more
所以我知道問題是流程引擎沒有使用正確的應用程序上下文,因為訂閱服務可以自動連接到其他類。 但是我不知道如何解決。
Web模塊純粹基於注釋:
@EnableAutoConfiguration
@Configuration
@EntityScan(basePackages = "cz.muni.fi.cep")
@ComponentScan(basePackages = "cz.muni.fi.cep")
public class App extends WebMvcConfigurerAdapter {
public static void main(String[] args) {
SpringApplication.run(App.class, args);
}
...
}
和Activiti配置:
@Configuration
public class ActivitiConfig {
@Bean
public ProcessEngine processEngine(ProcessEngineConfigurationImpl pec, ApplicationContext applicationContext) throws Exception {
ProcessEngineFactoryBean pe = new ProcessEngineFactoryBean();
pe.setProcessEngineConfiguration(pec);
pe.setApplicationContext(applicationContext);
return pe.getObject();
}
@Bean
public ProcessEngineConfigurationImpl getProcessEngineConfiguration(
DataSource dataSource,
PlatformTransactionManager transactionManager,
ApplicationContext context) {
SpringProcessEngineConfiguration pec = new SpringProcessEngineConfiguration();
pec.setDataSource(dataSource);
pec.setDatabaseSchemaUpdate("true");
pec.setJobExecutorActivate(true);
pec.setHistory("full");
pec.setMailServerPort(2025);
pec.setDatabaseType("mysql");
pec.setTransactionManager(transactionManager);
pec.setApplicationContext(context);
return pec;
}
@Bean
public RuntimeService getRuntimeService(ProcessEngine processEngine) {
return processEngine.getRuntimeService();
}
...
}
另外,也許上下文創建的順序與此有關。
一切看起來都不錯,我認為這可能很簡單,例如未掃描訂閱服務(它是否屬於包cz.muni.fi.cep?),或Spring為訂閱服務bean分配了另一個名稱(即dbSubscriptionService
或dBSubscriptionService
而不只是subscriptionService
)。
嘗試用@Service
@Service("subscriptionService")
替換DBSubscriptionService
類中的@Service("subscriptionService")
,它應該可以工作。
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