4 a.m.
Hi guy,
I start to be a bit confuse with the dependency injection. I really want to understand how
this works.
I try several thinkg and sometime it is working sometimes not.
Basicaly I have an application (i.e. MM) which consists of a set of Message driven beans,
beans, and entities that I want to used in another application (i.e. CMS) as a kind of
sub-component.
So I do include MM in CMS (the ejb-jar.xml, and persistence.xml file are used to
"configurate" MM).
For some reason MM need to know the application (e.g. CMS) that is using it so I used the
ejb-jar.xml file and a <env-entry> specification in each of my message driven and
other beans to specify this information.
Each bean (message driven or others) in MM has a property (i.e. applicationName) annotated
with @Resource and a get and set method to access it.
It seems that the injection of the resource my approach is working only for message-driven
bean but not the other beans and I do not understand why.
MM is deploy within CMS on JBOSS with a .ear file which as this structure:
| CMS.EAR
| |--META-INF
| | |--application.xml
| |--CMC.jar (message driven and persitence beans)
| | |--META-INF
| | |--ejb-jar.xml
| |--CMejb.jar (entities classes)
| | |--META-INF
| | |--persistence.xml
| |--MMejb.jar (MM message driven beans)
| |--MSMejb.jar (MM entity classes and persistence beans)
| |--CMSweb.war (CMS servlet...)
| |--MMweb.war (MM Servlet ...)
|
the application.xml in CMS.ear is:
| <application>
| <display-name>CMS</display-name>
| <module>
| <ejb>lib/cmsconfiguratorclient.jar</ejb>
| </module>
| <module>
| <ejb>CMC.jar</ejb>
| </module>
| <module>
| <ejb>CMejb.jar</ejb>
| </module>
| <module>
| <web>
| <web-uri>CMSweb.war</web-uri>
| <context-root>CARDWeb</context-root>
| </web>
| </module>
|
| <!-- MM -->
|
| <module>
| <ejb>MMweb.war</ejb>
| </module>
| <module>
| <ejb>MMejb.jar</ejb>
| </module>
| <module>
| <ejb>MSMejb.jar</ejb>
| </module>
|
| </application>
|
the ejb-jar.xml in CMC is
| <?xml version="1.0" encoding="UTF-8"?>
| <ejb-jar version="3.0"
xmlns="http://java.sun.com/xml/ns/javaee"
| xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
| xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/ejb-jar_3_0.xsd">
|
| <display-name>CMS</display-name>
| <enterprise-beans>
|
| <message-driven >
| <display-name>MessagerReceiver</display-name>
| <ejb-name>MessageReceiver</ejb-name>
|
<ejb-class>com.messaging.messagemanager.receiving.MessageReceiver</ejb-class>
| <transaction-type>Container</transaction-type>
| <activation-config>
| <activation-config-property>
|
<activation-config-property-name>destinationType</activation-config-property-name>
|
<activation-config-property-value>javax.jms.Queue</activation-config-property-value>
| </activation-config-property>
| <activation-config-property>
|
<activation-config-property-name>destination</activation-config-property-name>
|
<activation-config-property-value>queue/CMS</activation-config-property-value>
| </activation-config-property>
| </activation-config>
| <env-entry>
| <description>The name of the application</description>
|
<env-entry-name>com.messaging.messagemanager.receiving.MessageReceiver/applicationName</env-entry-name>
| <env-entry-type>java.lang.String</env-entry-type>
| <env-entry-value>CMS</env-entry-value>
| </env-entry>
| </message-driven>
|
| <session>
| <ejb-name>IncomingMessageHandler</ejb-name>
|
<ejb-class>com.ecebs.multefile.messaging.messagemanager.receiving.IncomingMessageHandler</ejb-class>
| <env-entry>
| <description>The name of the application</description>
|
<env-entry-name>com.messaging.messagemanager.receiving.IncomingMessageHandler/applicationName</env-entry-name>
| <env-entry-type>java.lang.String</env-entry-type>
| <env-entry-value>CMS</env-entry-value>
| </env-entry>
| </session>
|
| <session>
| <ejb-name>MessageStoreManagerBean</ejb-name>
|
<ejb-class>com.messaging.messagestoremanager.MessageStoreManagerBean</ejb-class>
| <env-entry>
| <description>The name of the application</description>
|
<env-entry-name>com.messaging.messagestoremanager.MessageStoreManagerBean/applicationName</env-entry-name>
| <env-entry-type>java.lang.String</env-entry-type>
| <env-entry-value>CMS</env-entry-value>
| </env-entry>
| <persistence-context-ref>
|
<persistence-context-ref-name>messagemanager_em</persistence-context-ref-name>
| <persistence-unit-name>messagemanager</persistence-unit-name>
| </persistence-context-ref>
| </session>
|
|
| </enterprise-beans>
|
| </ejb-jar>
|
all beans from MM are defined here with the same <env-entry>. here I put only few of
them to make it short.
when I debug my application and send a mock message to the "MessagerReceiver"
the "applicationName" is set with CMS so the dependency injection did work.
When i simulate I use the IncomingMessageHandler bean, the applicationName is not set with
the value specified in the ejb-jar.xml (i.e. CMS).
here the code of the incomingMessageHandler bean and MessageReceiver message driven bean:
| @Stateless
| public class IncomingMessageHandler implements IIncomingMessageHandler{
|
| //...
|
| @Resource
| private String applicationName;
|
| public String getApplicationName() {
| return applicationName;
| }
|
| public void setApplicationName(String applicationName) {
| this.applicationName = applicationName;
| }
|
| //...
| }
|
| public class MessageReceiver implements MessageListener{
| //...
|
| @Resource
| private String applicationName;
|
| public String getApplicationName() {
| return applicationName;
| }
|
| public void setApplicationName(String applicationName) {
| this.applicationName = applicationName;
| }
|
| public void onMessage(Message message) {
| //...
| }
| //...
|
a little help and explaination will be appreciated to understand what is wrong in my
code/approach.
Any good references/internet link that could help me to understand the structure of an ear
file or how to use ejb-jar.xml and persistence.xml in ear are also welcome.
Thanks a lot
View the original post :
http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4242124#...
Reply to the post :
http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...