GWTフレームワークでHibernateを使用してSpringをセットアップするのに問題があります。私はGWTにかなり慣れていません。アプリケーションコンテキストをセットアップして出力エラーなしでロードしていますが、現時点での主な問題は、サービスレイヤーの実装（PobaseServiceImpl）にappcontextでセットアップしたDAOが必要ですが、DAOをラップしていないことです。当然、私のRPCはdaoメソッドを呼び出そうとして、NullPointerExceptionが発生します。pobaseDaoを初期化したときに、TransactionProxyFactoryBeanによって設定されていません。
要約すると、DAOは、他のサービスと同じように、Springによって作成（つまり、構成）する必要があります。次に、Springを介してサービスに注入されます。次に、DAOを使用して、Springトランザクションプロキシ（org.springframework.transaction.interceptor.TransactionProxyFactoryBean）でラップし、Hibernate SessionFactory（org.springframework.orm.hibernate4.LocalSessionFactoryBean）を指定します。しかし、何らかの理由でそれはダオを設定していません
したがって、私のアプリケーションコンテキストはServletContextListenerを介してロードされています。これが私のアプリケーションコンテキストです：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<!--
Spring Framework application context definition for the POBASE Website.
-->
<beans>
<!-- Configurer that replaces ${...} placeholders with values from a properties file -->
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<value>classpath:/pobase.properties</value>
<value>file:${user.home}/pobase.properties</value>
</list>
</property>
<property name="ignoreResourceNotFound" value="no"/>
</bean>
<!-- Hibernate Data Source -->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${pobase.database.driver}" />
<property name="url" value="${pobase.database.url}" />
<property name="username" value="${pobase.database.user}" />
<property name="password" value="${pobase.database.password}" />
</bean>
<!-- Hibernate SessionFactory -->
<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource">
<ref bean="dataSource" />
</property>
<property name="packagesToScan" value="nz.co.doltech.pobase.client.entity"/>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">${pobase.hibernate.dialect}</prop>
<prop key="hibernate.show_sql">${pobase.hibernate.show_sql}</prop>
<prop key="javax.persistence.validation.mode">none</prop>
</props>
</property>
</bean>
<!-- Transaction manager for a single Hibernate SessionFactory (alternative to JTA) -->
<bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
<!-- Default transaction proxy, defining the transactional behaviour for
a typical Dao configuration -->
<bean id="baseDaoTransactionProxy" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean"
abstract="true">
<property name="transactionManager" ref="transactionManager" />
<property name="transactionAttributes">
<value>*=PROPAGATION_MANDATORY</value>
</property>
</bean>
<!-- Default transaction proxy, defining the transactional behaviour for
a typical Service configuration -->
<bean id="baseServiceTransactionProxy" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean"
abstract="true">
<property name="transactionManager" ref="transactionManager" />
<property name="transactionAttributes">
<value>*=PROPAGATION_REQUIRED</value>
</property>
</bean>
<!-- ========================= BUSINESS OBJECT DEFINITIONS ========================= -->
<bean id="pobaseDao" parent="baseDaoTransactionProxy">
<property name="target" ref="pobaseDaoTarget" />
</bean>
<bean id="pobaseDaoTarget" class="nz.co.doltech.pobase.server.dao.PobaseHibernateDao">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
<bean id="pobaseService" parent="baseServiceTransactionProxy">
<property name="target" ref="pobaseServiceTarget" />
</bean>
<bean id="pobaseServiceTarget" class="nz.co.doltech.pobase.server.service.PobaseServiceImpl">
<property name="pobaseDao" ref="pobaseDao" />
<!-- property name="accessControlService" ref="accessControlService" />
<property name="lookupService" ref="lookupService"/>
<property name="notificationService" ref="notificationService"/ -->
</bean>
</beans>
これが私のRPCサーブレットの実装です。
package nz.co.doltech.pobase.server.service;
/**
* Extends RSS and implements the PobaseService
* @author Ben
*/
@SuppressWarnings("serial")
public class PobaseServiceImpl extends RemoteServiceServlet implements PobaseService {
@SuppressWarnings("unused")
private static final Logger logger = Logger.getLogger(PobaseServiceImpl.class.getName());
private PobaseDao pobaseDao;
private final HashMap<Integer, PobaseEntity> pobaseEntities = new HashMap<Integer, PobaseEntity>();
private void fetchExternPobase()
{
pobaseEntities.clear();
List<PobaseEntity> pobaseList = pobaseDao.getAllPobase();
for (int i = 0; i < pobaseList.size(); i++)
{
PobaseEntity en = pobaseList.get(i);
if(en != null) {
pobaseEntities.put(en.getId(), en);
}
}
}
public void setPobaseDao(PobaseDao dao)
{
this.pobaseDao = dao;
}
public PobaseDao getPobaseDao()
{
return this.pobaseDao;
}
public PobaseData addLocalPobase(PobaseData pobase)
{
PobaseEntity entity = new PobaseEntity();
entity.mirrorObjectData(pobase);
pobase.setId(pobaseEntities.size());
pobaseEntities.put(pobase.getId(), entity);
return entity.getDataObject();
}
public PobaseData updateLocalPobase(PobaseData pobase)
{
PobaseEntity entity = new PobaseEntity();
entity.mirrorObjectData(pobase);
pobaseEntities.remove(entity.getId());
pobaseEntities.put(entity.getId(), entity);
return entity.getDataObject();
}
public Boolean deleteLocalPobase(int id)
{
pobaseEntities.remove(id);
return true;
}
public ArrayList<PobaseData> deleteLocalPobases(ArrayList<Integer> ids)
{
for (int i = 0; i < ids.size(); ++i) {
deleteLocalPobase(ids.get(i));
}
return getLocalPobaseData();
}
public ArrayList<PobaseData> getLocalPobaseData()
{
ArrayList<PobaseData> pobaseList = new ArrayList<PobaseData>();
Iterator<Integer> it = pobaseEntities.keySet().iterator();
while(it.hasNext())
{
PobaseData pobase = pobaseEntities.get(it.next()).getDataObject();
pobaseList.add(pobase);
}
return pobaseList;
}
public PobaseData getLocalPobase(int id)
{
return pobaseEntities.get(id).getDataObject();
}
public ArrayList<PobaseData> resyncExternPobase()
{
fetchExternPobase();
return getLocalPobaseData();
}
}
また、Webアプリケーションの起動ログも次のとおりです。
ServletContextListener started
Nov 12, 2012 8:20:33 PM nz.co.doltech.pobase.SpringInitialiser initSpringContext
INFO: Creating new Spring context. Configs are [/nz/co/doltech/pobase/appcontext.xml]
Nov 12, 2012 8:20:33 PM org.springframework.context.support.AbstractApplicationContext prepareRefresh
INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@8423321: startup date [Mon Nov 12 20:20:33 NZDT 2012]; root of context hierarchy
Nov 12, 2012 8:20:33 PM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from class path resource [nz/co/doltech/pobase/appcontext.xml]
Nov 12, 2012 8:20:33 PM org.springframework.core.io.support.PropertiesLoaderSupport loadProperties
INFO: Loading properties file from class path resource [pobase.properties]
Nov 12, 2012 8:20:33 PM org.springframework.core.io.support.PropertiesLoaderSupport loadProperties
INFO: Loading properties file from URL [file:/home/ben/pobase.properties]
Nov 12, 2012 8:20:33 PM org.springframework.beans.factory.support.DefaultListableBeanFactory preInstantiateSingletons
INFO: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@4c56666d: defining beans [org.springframework.beans.factory.config.PropertyPlaceholderConfigurer#0,dataSource,sessionFactory,transactionManager,baseDaoTransactionProxy,baseServiceTransactionProxy,pobaseDao,pobaseDaoTarget,pobaseService,pobaseServiceTarget]; root of factory hierarchy
Nov 12, 2012 8:20:33 PM org.springframework.jdbc.datasource.DriverManagerDataSource setDriverClassName
INFO: Loaded JDBC driver: org.postgresql.Driver
Nov 12, 2012 8:20:33 PM org.hibernate.annotations.common.Version <clinit>
INFO: HCANN000001: Hibernate Commons Annotations {4.0.1.Final}
Nov 12, 2012 8:20:33 PM org.hibernate.Version logVersion
INFO: HHH000412: Hibernate Core {4.1.7.Final}
Nov 12, 2012 8:20:33 PM org.hibernate.cfg.Environment <clinit>
INFO: HHH000206: hibernate.properties not found
Nov 12, 2012 8:20:33 PM org.hibernate.cfg.Environment buildBytecodeProvider
INFO: HHH000021: Bytecode provider name : javassist
Nov 12, 2012 8:20:34 PM org.hibernate.dialect.Dialect <init>
INFO: HHH000400: Using dialect: org.hibernate.dialect.PostgreSQLDialect
Nov 12, 2012 8:20:34 PM org.hibernate.engine.jdbc.internal.LobCreatorBuilder useContextualLobCreation
INFO: HHH000424: Disabling contextual LOB creation as createClob() method threw error : java.lang.reflect.InvocationTargetException
Nov 12, 2012 8:20:34 PM org.hibernate.engine.transaction.internal.TransactionFactoryInitiator initiateService
INFO: HHH000399: Using default transaction strategy (direct JDBC transactions)
Nov 12, 2012 8:20:34 PM org.hibernate.hql.internal.ast.ASTQueryTranslatorFactory <init>
INFO: HHH000397: Using ASTQueryTranslatorFactory
Nov 12, 2012 8:20:34 PM org.springframework.orm.hibernate4.HibernateTransactionManager afterPropertiesSet
INFO: Using DataSource [org.springframework.jdbc.datasource.DriverManagerDataSource@55acc0d4] of Hibernate SessionFactory for HibernateTransactionManager
Starting Jetty on port 8888
なぜそれが機能しないのかについて誰かが何か考えを持っていますか？ここにいくつかの仕様：
- 春3.2.0
- Hibernate4
- GWT SDK 2.4.0
私が得ることができるどんな助けにも感謝します！
乾杯、ベン