0003863: @Singleton injection

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Category

Severity

Reproducibility

Date Submitted

Last Update

0003863

[Resin]

minor

always

01-28-10 09:19

02-10-10 17:12

Reporter

ferg

View Status

public

Assigned To

ferg

Priority

normal

Resolution

fixed

Platform

Status

closed

Projection

none

OS Version

ETA

none

Fixed in Version

4.0.4

Product Version

4.0.2

Product Build

Summary

0003863: @Singleton injection

Description

(rep by Wesley Wu)

When a @ApplicationScoped/@Singleton bean is designed to be initialized
after webapp starts (I.E. when first http request was fired) instead of being
initialized during startup stage, in given circumstance, it won't be
injected correctly.

This is my test case:

========== StartBean ===========
public class StartBean {
    @Inject
    FirstBean firstBean;
}
========== FirstBean ===========
public class FirstBean {
    @Inject
    SecondBean secondBean;
}
========== SecondBean ===========
public class SecondBean {
    @Inject
    ThirdBean thirdBean;
    @Inject
    FourthBean fourthBean;
}
========== ThirdBean ===========
public class ThirdBean {
    @Inject
    SingletonBean singletonBean;
}
========== FourthBean ===========
public class FourthBean {
    @Inject
    SingletonBean dao;
}
========== SingletonBean ===========
@Singleton
//@Startup
public class SingletonBean {
}
========== MyServlet ===========
public class MyServlet extends HttpServlet {
    @Inject
    StartBean startBean;

    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        System.out.println("hello");
    }
}

========= web.xml ===========
<?xml version="1.0" encoding="UTF-8"?>
<web-app 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/web-app_2_5.xsd" [^]
           version="2.5">

    <servlet id="MyServlet">
        <servlet-name>MyServlet</servlet-name>
        <servlet-class>com.mycompany.servlet.MyServlet</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>MyServlet</servlet-name>
        <url-pattern>/MyServlet</url-pattern>
    </servlet-mapping>
</web-app>

=================================

The "http://localhost:8080/MyServlet" [^] request will produce this exception:

com.mycompany.servlet.MyServlet.startBean:
com.mycompany.beans.StartBean.firstBean:
com.mycompany.beans.FirstBean.secondBean:
com.mycompany.beans.SecondBean.fourthBean:
com.mycompany.beans.FourthBean.singletonBean:
java.lang.IllegalArgumentException:
Can not set com.mycompany.beans.SingletonBean field
com.mycompany.beans.FourthBean.singletonBean
to com.mycompany.beans.FourthBean

When I annotate the SingletonBean as @Startup, it's fine. (uncomment
the //@Startup line in SingletonBean.java)

Either @Singleton or @ApplicationScoped throws the exception.

It's a weird bug, taking me nearly two days to reproduce it in such a
simple test case.

Steps To Reproduce

Additional Information

Attached Files

Relationships

Notes
(0004425) ferg 02-10-10 17:12	ioc/0150

Issue History
Date Modified	Username	Field	Change
01-28-10 09:19	ferg	New Issue
01-28-10 09:20	ferg	Project	Quercus => Resin
02-10-10 17:12	ferg	Note Added: 0004425
02-10-10 17:12	ferg	Assigned To	=> ferg
02-10-10 17:12	ferg	Status	new => closed
02-10-10 17:12	ferg	Resolution	open => fixed
02-10-10 17:12	ferg	Fixed in Version	=> 4.0.4

Mantis 1.0.0rc3[^]

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