Status: New
Owner: ----
New issue 746 by [email protected]: Original initialized instance
values get lost after gucie injection
http://code.google.com/p/google-guice/issues/detail?id=746
Description of the issue:
I use Gucie to intercept any methods that have my defined annotation
@LogRequired. However for my application, some beans are initialized by
Spring with injected fields values. After calling giuce
injector.injectMembers(this), the beans gets proxied by guice but all
original fields values are gone. Looks like Guice re-constucts the beans
and throw away all old values. Is this expected behavior or how can I solve
this issue?
Steps to reproduce:
1. Create a class extends AbstractModule
public class InterceptorModule extends AbstractModule{
public void configure()
{
LogInterceptor tracing = new LogInterceptor();
requestInjection(tracing);
bindInterceptor(Matchers.any(),
Matchers.annotatedWith(LogRequired.class), tracing);
}
}
2. Define the interceptor business logic
public class LogInterceptor
implements MethodInterceptor
{
//business logic here
}
3. Create LogService class
Public class LogService
{
Injector injector = Guice.createInjector(new InterceptorModule());
}
4. I have one of the bean example below with the getName method wants to be
intercepted:
public class UserImplTwo implements IUser
{
private String name;
@LogRequired
public String getName() {
return this.name;
}
public void setName(String name) {
this.name = name;
}
}
which is initialized by Spring context:
<bean id="userTwo" class="com.consumer.impl.UserImplTwo">
<property name="name" value="hello world"></property>
</bean>
5. Finally I have a consumer to consume the bean:
public class Consumer
{
@Inject
private UserImplTwo instance;
public void setInstance(UserImplTwo instance)
{
this.instance = instance;
}
public void init()
{
// the value of name is printed out as 'hello world'
System.out.println( this.instance.getName());
LogService.injector.injectMembers(this);
// the value of name is printed out as null, should be 'hello
world'
System.out.println( this.instance.getName());
}
Then use Spring to initialized the bean:
<bean id="consumer" class="com.demo.Consumer" init-method="init">
<property name="instance" ref="userTwo"></property>
</bean>
Please let me know if this the the right approach or if I did something
wrong, because I have to use Spring to initialize some beans.
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