Hi,
I'm looking for advice on how to best integrate Spring with Guice.
Basically, I want to be able to use Spring managed modules with Guice
managed ones. Guice Spring does that, but the implementation is a bit
simplistic. Particularly, the (very typical) case where you'd define
the implementing class in the Spring config, but in code refer to the
interface isn't supported.
E.g. (in applicationContext.xml):
<bean id="springGreeter"
class="com.foo.DefaultSpringGreeter">
</bean>
Key<SpringGreeter> key = Key.get(SpringGreeter.class, Names
.named("springGreeter"));
SpringGreeter springGreeter = Dependencies.getInstance(key);
(SpringGreater is the interface that is implemented by DefaultSpringGreeter).
The problem is that only the implementation type is registered. A
quick fix in the Spring support package is this:
private static final Pattern IGNORE_PACKAGES = Pattern
.compile("^javax?\\.|^com.sun\\.");
static void bindAll(Binder binder, ListableBeanFactory beanFactory) {
binder = binder.skipSources(SpringBindings.class);
for (String name : beanFactory.getBeanDefinitionNames()) {
Class<?> type = beanFactory.getType(name);
for (Class<?> intf : type.getInterfaces()) {
if
(!IGNORE_PACKAGES.matcher(intf.getName()).find()) {
bindBean(binder, beanFactory, name,
intf);
}
}
bindBean(binder, beanFactory, name, type);
}
}
but it's a bit brute force. Is there a nicer way to do this? Any other
pitfalls when it comes to integrating Spring with Guice?
Cheers,
Eelco
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