Breaking application in different modules

[akamran]

Hello !

I am trying to break my appliation in different spring modules. Each module will have its own configuration files, handlers, database logic etc. The idea is to reuse a complete functional logic in any web application by adding just a single jar.

Following is the configuration

for a module a create a seperate project with following directory structure

SeperateModule
|
---actionhandler
| |
| ---TestHandler.java
|
---config
|
---SeperateModule.xml


the SeperateModule.xml file contains the applicationcontext for TestHandler

<beans>
<bean class="org.springframework.web.servlet.handler.Sim pleUrlHandlerMapping">
<property name="mappings">
<value>
/*.test=testHandler
</value>
</property>
<property name="JDBCTemplate">
<ref bean="JDBCTemplate"/>
</property>
</bean>

<bean name="testHandler" class="com.avanza.ambit.actionhandler.TestHandler" />

<bean id="viewResolver" class="org.springframework.web.servlet.view.Intern alResourceViewResolver">
<property name="prefix" value="/"/>
<property name="suffix" value=""/>
</bean>

</beans>



The main applicationcontext is as follows

<beans>
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<property
name="driverClassName"><value>com.microsoft.sqlser ver.jdbc.SQLServerDriver</value></property>
<property name="url"><value>jdbc:sqlserver://testserver;databaseName=testdb;sendStringParameter sAsUnicode=true</value></property>
<property name="username"><value>test</value></property>
<property name="password"><value></value></property>
</bean>

<bean id="JDBCTemplate"
class="org.springframework.jdbc.core.JdbcTemplate" >
<constructor-arg index="0"><ref bean="dataSource" /></constructor-arg>
</bean>
</beans>


and the web.xml is as follows

<servlet>
<servlet-name>seperatemodule</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherSe rvlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>
classpath:config/SeperateModule.xml
</param-value>
</init-param>
</servlet>

<servlet-mapping>
<servlet-name>seperatemodule</servlet-name>
<url-pattern>*.test</url-pattern>
</servlet-mapping>


The handler is correctly called but I was unable to use the JDBCTemplate bean define in main applicationcontext.xml in my module context file i.e. SeperateModule.xml

I believe there should be no problems accessing it ... but unable to understand why this exception is occured.

Error creating bean with name 'org.springframework.web.servlet.handler.SimpleUrl HandlerMapping' defined in class path resource [SeperateModule.xml]: Cannot resolve reference to bean 'JDBCTemplate' while setting bean property 'JDBCTemplate'; nested exception is org.springframework.beans.factory.NoSuchBeanDefini tionException: No bean named 'JDBCTemplate' is defined

[karldmoore]

It appears that the child definition doesn't know about the beans defined in the parent. Have you tried simply specifying multiple applicationContext files to load with ContextLoaderListener instead?