Updates:
Summary: Scopes.SINGLETON uses a global lock
Comment #4 on issue 183 by limpbizkit: Scopes.SINGLETON uses a global lock
http://code.google.com/p/google-guice/issues/detail?id=183
This also impacts single injectors. I think the best policy is to avoid
creating threads inside Providers,
@Provides methods and injected members.
public void testSingletonScope() {
Injector injector = Guice.createInjector(new AbstractModule() {
@Override protected void configure() {}
@Provides @Singleton Long provideTwo(final Provider<Integer>
oneProvider) throws Exception {
return Executors.newSingleThreadExecutor().submit(new
Callable<Integer>() {
public Integer call() throws Exception {
return oneProvider.get();
}
}).get() + 1L;
}
@Singleton @Provides Integer provideOne() throws ExecutionException,
InterruptedException {
return 1;
}
});
injector.getInstance(Long.class);
}
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