I have a Web service application based on JPA (Hibernate), Spring and CXF.
I am facing some lazy-load exceptions after transactional business methods (because I need some extra beans to be rendered in the rpesentation layer), and I wanted to give a try to the OpenSession/EntityManagerInView pattern.
Please do not argue this choice, we are just giving it a try.
The issue is that, since I am using CXFServlet, instead of standard Spring Servlet, I cannot use OpenEntityManagerInViewFilter in web.xml.
I cannot use either OpenEntityManagerInViewInterceptor which applies as a WebRequest Interceptor (and does not work with CXF interceptor/filters).
Finally I am aware of the HibernateInterceptor, an AOP proxy which wraps any method into a session. But still : this one is for the Hibernate API, not JPA API (I am using EntityManagerFactory, rather than SessionFactory).
So, are you aware of either :
A HibernateInterceptor for the JPA API (EntityManagerInterceptor ?)
A way to adapt a Spring WebRequestInterceptor into a JAX-RSfilter ?
Any other solution ?
Thanks in advance for your help.
Once again, I finally found what I wanted ...
There is actually a JpaInterceptor that does what I want (it seems deprecated though. I do not really understand why).
Here is the resulting configuration that works like a charm, with a bit of auto proxy by name :
<bean id="jpaInterceptor" class="org.springframework.orm.jpa.JpaInterceptor">
<property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>
<bean id="jpaAutoProxy" class="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator" >
<property name="beanNames">
<list>
<value>myService1</value>
<value>myService2</value>
<value>...</value>
</list>
</property>
<property name="interceptorNames">
<list><value>jpaInterceptor</value></list>
</property>
</bean>
<jaxrs:server id="services" address="/">
<jaxrs:serviceBeans>
<ref bean="myService1" />
<ref bean="myService2" />
<ref bean="..." />
</jaxrs:serviceBeans>
</jaxrs:server>
Related
Mine is a old legacy project and I am using Spring 1.2.5 . I am trying below code to apply aop over one of my business classes :
<bean id="hijackBeforeMethodBean" class="com.mycom.myapp.common.logging.LoggingAdvice" />
<bean id="demoServiceProxy"
class="org.springframework.aop.framework.ProxyFactoryBean">
<property name="target">
<ref local="demoDelegate"></ref>
</property>
<property name="interceptorNames">
<list>
<value>hijackBeforeMethodBean</value>
</list>
</property>
</bean>
</beans>
In addition to this :
I firstly tried this over controllers ,but it didnt work.
I followed this link
http://www.javatpoint.com/spring-aop-example
but this asks me to inject or use the proxyfactory bean. A sper my current code I am injecting delegate beans in the controllers ,so in tht case I might have to change all my bean ids.
Please suggest some solution to this.
As I am planning to update from "hibernate3" to "hibernate4" & "spring 3.0.5" to "spring 3.1.4".
I have configured OpenSessionInViewInterceptor in spring 3.0.5 so want to configure same in 3.1.4.
But I am not able to configure flushMode in OpenSessionInViewInterceptor of Spring 3.1.4;
My Previous setting for spring 3.0.5 was:
<bean name="openSessionInViewInterceptor"
class="org.springframework.orm.hibernate3.support.OpenSessionInViewInterceptor">
<property name="sessionFactory">
<ref bean="sessionFactory" />
</property>
<property name="flushMode">
<bean
id="org.springframework.orm.hibernate3.HibernateAccessor.FLUSH_NEVER"
class="org.springframework.beans.factory.config.FieldRetrievingFactoryBean" />
</property>
</bean>
Now tried to configure same for spring 3.1.4 as below:
<bean name="openSessionInViewInterceptor"
class="org.springframework.orm.hibernate4.support.OpenSessionInViewInterceptor">
<property name="sessionFactory">
<ref bean="sessionFactory" />
</property>
<property name="flushMode">
<bean
id="org.springframework.orm.hibernate3.HibernateAccessor.FLUSH_NEVER"
class="org.springframework.beans.factory.config.FieldRetrievingFactoryBean" />
</property>
</bean>
then it throws below exception:
org.springframework.beans.NotWritablePropertyException: Invalid property 'flushMode' of bean class [org.springframework.orm.hibernate4.support.OpenSessionInViewInterceptor]: Bean property 'flushMode' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?
And there is no similar class found in alternate to org.springframework.orm.hibernate3.HibernateAccessor in spring 3.1.4
So my question is how to set flushMode property of OpenSessionInViewInterceptor of spring 3.1.4 ?
It looks like a mess, with unbound links to property accessors. I'd guess that a copy-paste job was done without much thinking about cleaning things up given the different inheritance hierarchies. I hate it when that happens…
Can you use the Hibernate 3 version instead? Yes, it really does appear to be there; here's the link: org.springframework.orm.hibernate3.support.OpenSessionInViewInterceptor
Longer term, look more carefully whether the Hibernate 4 code does what you want without specifying the flag at all. Unfortunately, you'll have to ignore the documentation (at least for now) and study the source itself.
I have a project with spring and hibernate in GWT,
I am using below applicationcontext.xml,
I was just looking for some best approach of making this file
like all the annotated classes below i.e entity.user, entity.secretQuestion and many more , they all get called when my application runs even if i don't need them , which i guess makes my application quite slow,
so is it possible that only the class which i am calling is getting load in applicationcontext.xml and if yes then would it be a better approach as well ?
<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="annotatedClasses">
<list>
<value>com.cricsite.persistence.entity.User</value>
<value>com.cricsite.persistence.entity.SecretQuestion</value>
</list>
</property>
</bean>
<bean id ="ManagerAdmin" class= "com.persistence.MySQLRdbHelper">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
You might be looking for something called "lazy loading"
Please take a look at these threads;
Help needed with Spring/Hibernate Lazy-loading
What is lazy loading in Hibernate?
how does spring allow for lazy-loading?
I have the following config.
<bean id="abcManager" parent="TxProxyTemplate">
<property name="target">
<bean class="com.x.y.AbcManagerImpl">
<property name="abcDAO" ref="abcDAO"/>
<property name="xyzManager" ref="xyzManager"/>
</bean>
</property>
</bean>
<bean id="xyzManager" parent="TxProxyTemplate">
<property name="target">
<bean class="com.x.y.XyzManagerImpl">
<property name="abcDAO" ref="abcDAO"/>
<property name="anotherManager" ref="anotherManager"/>
</bean>
</property>
</bean>
<bean id="anotherManager" parent="TxProxyTemplate">
<property name="target">
<bean class="com.x.y.AnotherManagerImpl">
<property name="abcDAO" ref="abcDAO"/>
<property name="oneMoreManager" ref="oneMoreManager"/>
</bean>
</property>
</bean>
What is the issue with the following configuration? will having the same DAO at the different levels cause concurency issues?
We found that we get lots of weblogic connection releases when we have high load.
How is this related to the connection release issue?
We use Hibernate for DAO operations.
First, analyse the logs to see when spring creates and closes transactions.
Set the logger for org.springframework.transaction to DEBUG for this.
Next my guess is you need to examine your #Transactional annotations (which I assume you use on your managers (=services?). Make sure the propagation is set correctly because this might be related to your issue (hard to say without seeing your manager's code of course).
To answer your question directly:
What is the issue with the following configuration? will having the same DAO at the different levels cause concurency issues?
Nothing, and no. I don't see anything wrong with this. Not sure what you mean about 'same DAO' - you don't have the same DAO. You have the same parent, but 3 distinct DAOs.
If you're asking, then, why is weblogic closing your DB connections before your transaction completes, we wouldn't be able to answer that with the information above.
We are migrating our web application from Spring 2.5 to Spring 3.0.5. Looks like all the Controller classes (the classes in org.springframework.web.servlet.mvc package: BaseCommandController, AbstractCommandController, SimpleFormController, etc) have been deprecated. We used those classes heavily in our application. These classes have been replaced by #Controller annotation instead.
I have a few questions regarding Spring 3.0.x Controller configuration...
We used the following XML to create a Controller bean in Spring 2.5. If <context:component-scan> is used instead to create the Controller beans, then how do I wire-in the dependencies? If possible I would like to avoid Auto-Wiring.
<bean id="photosetViewController" class="com.xyz.web.PhotosetViewController"
p:photosetManager-ref="photosetManager"
p:photoManager-ref="photoManager" />
We have created 3 Interceptors. We use SimpleUrlHandlerMapping to map these Interceptors to different request URLs and also to map URLs to Controllers. How do we achieve the same in Spring 3.0.x?
<bean class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<property name="alwaysUseFullPath" value="true" />
<property name="interceptors">
<list>
<ref bean="httpRedirectInterceptor"/>
<ref bean="loginInterceptor"/>
</list>
</property>
<property name="mappings">
<value>
/abc.html=abcLookupController
/photoupload.html=photoUploadController
</value>
</property>
</bean>
<bean class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<property name="alwaysUseFullPath" value="true" />
<property name="interceptors">
<list>
<ref bean="httpRedirectInterceptor"/>
<ref bean="loginInterceptor"/>
<ref bean="userMenuInterceptor" />
</list>
</property>
<property name="mappings">
<value>
/index.html=homepageController
/success.html=simpleController
</value>
</property>
</bean>
In case of SimpleFormControllers we used different methods like initBinder, referenceData, formBackingObject. We also used command objects and validation classes. How do we achieve the same in Spring 3.0.x?
<bean id="photosetAddController" class="com.xyz.web.PhotosetAddController"
p:photosetManager-ref="photosetManager"
p:photosetTypeManager-ref="photosetTypeManager"
p:stateManager-ref="stateManager" >
<property name="validator">
<bean class="com.xyz.form.PhotosetAddValidator" />
</property>
<property name="formView" value="photosetadd" />
<property name="successView" value="redirect:/photoset" />
</bean>
Any pointers are greatly appreciated.
As skaffman noted - your code will work fine without any modifications. I'll answer your questions in short:
You can use #Resource(name="beanName") for name-based injection. But autowiring is also a good option. Either #Autowired, or #javax.inject.Inject. Note that you can use #Qualifier("name") to differentiate between beans with the same interface/base class. You can even use the javax.inject qualifiers (read about all these in the docs)
interceptor mappings can stay the same
There is #InitBinder, which denotes the initBinder method. I can't tell about the other.