Spring Autowire fails with No qualifying bean of type found for dependency error - spring

Question

Here's my scenario. My project is using Spring (3.2.3.RELEASE), Struts2 (2.3.14.3) and JPA (2.0). We have a project (let's call it project A) that contains various entities and common classes. We use project A to generate a .jar file so that other projects can use these classes. In project A we've used the Spring stereotypes: #Component. #Service or #Repository for those classes we want Spring to inject. Whenever we try to inject beans from the jar, we get an error similar to:
No qualifying bean of type
[com.ceiwc.bc.commonsql.service.CommonSQLService] found for
dependency: expected at least 1 bean which qualifies as autowire
candidate for this dependency. Dependency annotations:
{#org.springframework.beans.factory.annotation.Autowired(required=true)}
Could not autowire field: private com.ceiwc.bc.commonsql.service.CommonSQLService
com.ceiwc.ma.mvc.action.LoginAction.commonSQLService; nested exception
is org.springframework.beans.factory.NoSuchBeanDefinitionException: No
qualifying bean of type
[com.ceiwc.bc.commonsql.service.CommonSQLService] found for
dependency: expected at least 1 bean which qualifies as autowire
candidate for this dependency. Dependency annotations:
{#org.springframework.beans.factory.annotation.Autowired(required=true)}
Error creating bean with name 'com.ceiwc.ma.mvc.action.LoginAction': Injection of autowired
dependencies failed; nested exception is
org.springframework.beans.factory.BeanCreationException: Could not
autowire field: private
com.ceiwc.bc.commonsql.service.CommonSQLService
com.ceiwc.ma.mvc.action.LoginAction.commonSQLService; nested exception
is org.springframework.beans.factory.NoSuchBeanDefinitionException: No
qualifying bean of type
[com.ceiwc.bc.commonsql.service.CommonSQLService] found for
dependency: expected at least 1 bean which qualifies as autowire
candidate for this dependency. Dependency annotations:
{#org.springframework.beans.factory.annotation.Autowired(required=true)}
Unable to instantiate Action, com.ceiwc.ma.mvc.action.LoginAction, defined for 'doLogin' in namespace '/Login'Error creating bean with
name 'com.ceiwc.ma.mvc.action.LoginAction': Injection of autowired
dependencies failed; nested exception is
org.springframework.beans.factory.BeanCreationException: Could not
autowire field: private
com.ceiwc.bc.commonsql.service.CommonSQLService
com.ceiwc.ma.mvc.action.LoginAction.commonSQLService; nested exception
is org.springframework.beans.factory.NoSuchBeanDefinitionException: No
qualifying bean of type
[com.ceiwc.bc.commonsql.service.CommonSQLService] found for
dependency: expected at least 1 bean which qualifies as autowire
candidate for this dependency. Dependency annotations:
{#org.springframework.beans.factory.annotation.Autowired(required=true)}
We are using Java configuration for Spring. Here is our configuration class:
package com.zzz.bc.config;
#Configuration
#ImportResource({"/WEB-INF/spring/spring-config.xml"})
#ComponentScan(basePackages = "com.zzz")
public class ApplicationConfig {
#Bean
public JavaMailSender mailSender() {
JavaMailSenderImpl mailSender = new JavaMailSenderImpl();
mailSender.setHost(${app.mail.host});
return mailSender;
}
}
package com.zzz.bc.config;
#Configuration
#EnableTransactionManagement
#Import(ApplicationConfig.class)
#PropertySource({"classpath:db.properties"})
public class DataConfig {
#Autowired
Environment environment;
#Bean
public PlatformTransactionManager transactionManager() {
JpaTransactionManager transactionManager = new JpaTransactionManager();
transactionManager.setEntityManagerFactory(entityManagerFactoryBean().getObject());
return transactionManager;
}
#Bean
public LocalContainerEntityManagerFactoryBean entityManagerFactoryBean() {
String[] packagesToScan =
{environment.getProperty("db.packagesToScan1"), environment.getProperty("db.packagesToScan2")};
Map<String, Object> jpaProperties = new HashMap<String, Object>();
jpaProperties.put("eclipselink.weaving", "false");
LocalContainerEntityManagerFactoryBean entityManagerFactoryBean = new LocalContainerEntityManagerFactoryBean();
entityManagerFactoryBean.setDataSource(dataSource());
entityManagerFactoryBean.setPackagesToScan(packagesToScan);
entityManagerFactoryBean.setLoadTimeWeaver(new InstrumentationLoadTimeWeaver());
entityManagerFactoryBean.setJpaVendorAdapter(vendorAdapter());
entityManagerFactoryBean.setJpaPropertyMap(jpaProperties);
return entityManagerFactoryBean;
}
#Bean
public DriverManagerDataSource dataSource() {
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName(environment.getProperty("db.driver"));
dataSource.setUrl(environment.getProperty("db.url"));
dataSource.setUsername(environment.getProperty("db.username"));
dataSource.setPassword(environment.getProperty("db.password"));
return dataSource;
}
#Bean
public JpaVendorAdapter vendorAdapter() {
EclipseLinkJpaVendorAdapter vendorAdapter = new EclipseLinkJpaVendorAdapter();
vendorAdapter.setDatabase(Database.ORACLE);
vendorAdapter.setShowSql(true);
return vendorAdapter;
}
#Bean
public PersistenceExceptionTranslationPostProcessor exceptionTranslation() {
return new PersistenceExceptionTranslationPostProcessor();
}
}
We have #ComponentScan set to check to bean in the package of com.zzz. In project B, we have a Struts2 Action that we want to inject a bean from project A. Here is a snippet of the class from project B:
#SuppressWarnings("rawtypes")
#Service("CommonSQLService")
public class CommonSQLServiceImpl implements CommonSQLService {
#Autowired
CommonSQLDao cdao;
#Override
public Policy getPolicyById(String policyNo) {
return cdao.getPolicyById(policyNo);
}
#Override
public Policy getPolicy(Policy parmRec) {
return cdao.getPolicy(parmRec);
}
#Override
public ArrayList<Policy> getPolicies(String policyNo) {
return cdao.getPolicies(policyNo);
}
#Override
public List<Policy> getPolicies(Policy parmRec){
return cdao.getPolicies(parmRec);
}
}
Here is our action (removed getters/setters):
package com.zzz.ma.mvc.action;
#SuppressWarnings("serial")
#Component
#Scope("prototype")
#Namespace("/Login")
public class LoginAction extends ActionParent {
#Autowired
private IUserService userService; //Contained in project B
#Autowired
private CommonSQLService commonSQLService; //What's autowired from project A
private User user;
private String updateFlag;
private Integer parentMenuId;
private IwifWebNavmenuItem record;
public static final String LOGIN_STR = "login";
#Action(value = "doLogin", results = { #Result(name = "success", location = "/pages/login.jsp") })
public String login() {
updateFlag = "Y";
return SUCCESS;
}
#Action(value = "validate", results = {
#Result(name = "success", location = "/BrowseOptions/showOptions", type = "redirect"),
#Result(name = "login", location = "/pages/login.jsp") })
public String validateUser() {
if (updateFlag == null) {
session.remove(LOGIN_STR);
return LOGIN;
}
if (userService.validateUser(user.getUsername(), user.getPassword()) == null) {
addActionError(getText("invalid.user"));
return LOGIN;
}
session.put(LOGIN_STR, user.getUsername());
return SUCCESS;
}
#Action(value = "logout", results = { #Result(name = "success", location = "/pages/login.jsp") })
public String logout() {
updateFlag = StringUtils.EMPTY;
session.invalidate();
return SUCCESS;
}
}
Whenever we try to do this autowire, we get an error like the one listed above. What are we missing? Can't classes contained in a jar file with Spring Stereotypes be autowired?
Thanks for you help in advance!

Answer 1

Change #Service("CommonSQLService") to #Service("commonSQLService") or you can just use #Service if you're not implementing the CommonSQLService interface anywhere else.