Ganesh Gowtham

HI Folks,


I am newbie to JBOSS World .

I am trying to migrate my application which has Seam, Ejb, Struts, JSF and JMS from JBoss 4.2.0 to Jboss 5.1.0

Following are my quetsions

Can i call EJB exposed in JBOSS 5.1.0 from JBOSS 4.2.0 ?, if not is there any work around like having jars will help them

Can i consume EJB exposed in JBOSS 4.2.0 from JBOSS 5.1 ?, if not is there any work around like having jars will help them

I had hard time in finding the port where EJB is exposed in JBOSS 5.1.0, I would like to know name of file.

can present consumer of JBOSS 4.2.0 from standalone process call EJB exposed in JBOSS 5.1.0?

Thanks in advance.

HI Folks,


I am newbie to JBOSS World .

I am trying to migrate my application which has Seam, Ejb, Struts, JSF and JMS from JBoss 4.2.0 to Jboss 5.1.0

Following are my quetsions

Can i call EJB exposed in JBOSS 5.1.0 from JBOSS 4.2.0 ?, if not is there any work around like having jars will help them

Can i consume EJB exposed in JBOSS 4.2.0 from JBOSS 5.1 ?, if not is there any work around like having jars will help them

I had hard time in finding the port where EJB is exposed in JBOSS 5.1.0, I would like to know name of file.

can present consumer of JBOSS 4.2.0 from standalone process call EJB exposed in JBOSS 5.1.0?

Thanks in advance.

Hi Folks,

I would like to give seminar on Restful Services using the Jersey (or) Spring Jersey.

Could someone guide me some advanced and intersting concepts, which will used for techies who attend the session?

Some of the concepts which come to my mind

Reperesting resources as hyperlinks HATEOAS

Authentication

Thanks in advance.

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd"> <bean id="list" class="java.util.ArrayList"> <constructor-arg> <value>cool man</value> </constructor-arg> </bean> <bean id="list2" class="java.util.ArrayList"> <constructor-arg> <value>cool man two</value> </constructor-arg> </bean> </beans>

I would like to add all entries of list2 to list , so that when i iterate the "list" in java i will get all entries ( coolman,coolman two)

may i know how to achieve the same ?

Thanks in advance

Scenraio is something of this sort ...

In our project we have couple of Spring beans save POJO ( service layer which talks to dao ...)

During the spring context startup, i would like to expose configured beans as Restful services ...

As @Lance said, i need to tweak or extend or customise the spring loading stuff to acieve the same ...

Any examples or WIKI or idea would be really appreciated.

Hi Folks,

I would like introduce some dynamic cabability of exposing the spring bean as restful services

scenario is

1) i need to read the list of spring bean id's from fileat runtime( or during the loading time of web app)
2) based on bean id's i fetch from step 1 , i need to some how expose the beans as restful services

is there a way to acieve the same ?

Hi Folks,

I would like introduce some dynamic cabability of exposing the spring bean as restful services

scenario is

1) i need to read the list of spring bean id's from fileat runtime( or during the loading time of web app)
2) based on bean id's i fetch from step 1 , i need to some how expose the beans as restful services

is there a way to acieve the same ?

Since i woudl like to use same pojo for testing too ( i made required=false ) all beans will load on need basis in main app too ...

i got solution from below licnk , which works on manuplating DOm tree before spring intilaises

.Spring Link

Thanks Mark for help .

Hi ,

I had written class which extends “AbstractTransactionalSpringContextTests” for testing my beans instantiated via spring framework .

I had annotated all java classes eligible for spring to load with @Service,@Autowire,@Qualifier in XML along with component scanning with pkg which has annotated classes .

Issue I face when I tried to inject properties (with autowire ) for classes which is not apart of component scanning ( I purposefully left those packages in scanning, as I am not interested in testing / loading the class)
Spring does because required is set to true by default in Autowired class.
Hence to resolve this issue , I added “default-lazy-init="true" in xml , which resolved my issue .

Even with “AbstractTransactionalSpringContextTests” we have that option using “setDependencyCheck(false) ".it is not working as expected .

I prefer way to do in test class level , rather than changing xml ( FYI going fwd we would like to use same XML for application and testing )

With @Autowired it perfectly works with abstract classes ,Thanks for info

is there way to create the virtual abstract bean

<bean id="sampleDao" abstract="true"> <property name="hibernateTemplate" ref="sampleHibernateTemplate" /> </bean>

in above XML case ,we really dont have real abstract class in java ,instead we call hibernamteTemplate (aka sampleDao )

Thanks in advance .

Hi Mark ,

Thanks for your kind reply .

We construct abstract bean like
<bean id="sampleDao" abstract="true"> <property name="hibernateTemplate" ref="sampleHibernateTemplate" /> </bean>
How this can be changed using annotation ? can it be done if so how ?


@Scope - i will check this annotation .

Can you eleborate on this please "I can create the pojo Factory as a bean, then inject it in places that can call the factory method when it needs those objects. "

<bean id="carsDataSource" class="com.firm.core.api.persistence.JdbcDataSource" factory-method="getMyInstance"/>

Thanks in advance .

HI Ranchers !!!

I am working on migration of Spring XML to Spring Annotaions , Since we have limitation we have to use featured upto spring 2.5.6

As per my idea , we cant achieve all things that we do via XML

Few Limitations with Annotations
-------------------------------------

1) cant declare bean (pojo) as abstract , as we do in XML
2) Factory way of instantiating beans
3) Lazy loading
4) Declaring bean as prototype (or) non prototype
5) Injecting collections to bean

Let me know if we have any work around of above mentioned issues .

Could somebody point out link , where i can see spring annotations limitations .

Thanks in advance

try usemodtime , seems deprecated

Sarah Raf wrote:Thanks for the Quick reply Ganesh.
Do I need to make my HashMap class as protected then?

How can you do this ? ( will you extends Hashmap bh any chance if so you do ,but for your requirement it doesnt makes sense for that effort ) .

import java.util.HashMap; import java.util.Map; public class XmlCacher { private static Map<String, Object> xmlCachedMap = new HashMap<String, Object>(); // @TODO // make XMlCahcer class as Singleton so that you have one instance in JVM public static Object getXMLObject(String key) { if (xmlCachedMap.containsKey(key)) { return xmlCachedMap.get(key); } else { // get from DB // and store in map return "key"; } } }

In above scenario makes sure while you are retriving from DB , make all other threads in wait stage , else those threads will get the satle data or null values .

Hope it helps .

Concepts to use
Singleton , In memory Caching , Threading ...

What you are doing is concept called "Caching In Memory" .

If you are using in Web Appln , store this hashmap instance in Application scope .

In standalone , as far your instance is alive you have data in hashmap , write the code in such as way , none of other class have access to modify values in hashmap .