Is there a good way to diagnose spring bean/service creation problem?

问题

My project uses spring and spring-dm for bean/service configuration. When I try to import an old project which also use spring for DI, bean will not be created.

An example to make clear,

I first define a url-alias in spring-appContext.xml

<bean name="xxxx" class="XRegistry" init-method="init">
    <property name="webRoot" value="/WebContent"></property>
    <property name="alias" value="/test"></property>
    <property name="cAliasPattern" value="/test/*.do" />
    <property name="conConfigFile" value="ddd.xml"/>
</bean>

in ddd.xml, I define some controller bean with url like /test/abc.do

No errors occur when launching as OSGi framework in eclipse. But when I try to access the URL(/test/abc.do)，"Unknown OSGi URL:" is met.

The problem really confuses me is I am not clear where to start. My bundle has depended on spring bundles and have appContext.xml and dispatcher.xml. Just a normal spring usage scenario.

As spring looks like black box to me, I can only try some other possible reasons I can think, but haven't fixed it till now. Is somebody know how to moniter the spring startup process or helpful logs?

Thanks.

Edit when using spring-dm, you need to create a new fragment including log4j.properties to enable logging. This can help u to track spring startuping error.

As I explain in the 1st answer, the root cause is found, two choice,

For those bundles exist in both workspace and target platform, increase the bundle's version in current workspace. When error happens , you should also look into the dependency bundles
Remove the high version bundles in target platform.

回答1:

Have you tried setting the log level for the spring framework to debug?

E.g.

log4j.rootLogger=WARN, stdout
[...]
log4j.logger.org.springframework=DEBUG

This is always my first starting point when trying to diagnose problems with bean creation.

来源：https://stackoverflow.com/questions/6967917/is-there-a-good-way-to-diagnose-spring-bean-service-creation-problem

标签

Spring

javabeans

startup

monitor

creation