--- title: 'Guice 3.0 ist raus' url: 'https://www.tutego.de/blog/javainsel/2011/03/guice-3-0-ist-raus' markdown: 'https://www.tutego.de/blog/javainsel/2011/03/guice-3-0-ist-raus.md' date: '2011-03-25' description: 'Nach laaaanger Wartezeit ist DI-Framework Guice 3.0 veröffentlicht worden. Von die Neuerungen: JSR 330 support New Persist extension ToConstructor Bindings Better OSGi support (and generally improved support for multiple classloaders) New methods in Binder: requireExplicitBindings & disableC…' taxonomy: category: - 'Open Source' - Google - Guice --- # Guice 3.0 ist raus ![Illustration einer tropischen Insel mit Palmen und einem hohen Berg](https://www.tutego.de/blog/javainsel/user/themes/tutego/images/insel-cover.jpg)# Java Blog für Programmierer [Java Blog für Programmierer](https://www.tutego.de/blog/javainsel/) ## Guice 3.0 ist raus 25.03.2011 · [Christian Ullenboom](https://www.tutego.de/blog/javainsel/author/admin/) Nach laaaanger Wartezeit ist DI-Framework Guice 3.0 veröffentlicht worden. Von die Neuerungen: > - [JSR 330 support](http://code.google.com/p/google-guice/wiki/JSR330) > - [New Persist extension](http://code.google.com/p/google-guice/wiki/GuicePersist) > - [ToConstructor Bindings](http://code.google.com/p/google-guice/wiki/ToConstructorBindings) > - Better OSGi support (and generally improved support for multiple classloaders) > - New methods in Binder: `requireExplicitBindings` & `disableCircularProxies` > - Much simpler stack traces when AOP is involved > - Exact duplicate bindings are ignored (instead of an exception being thrown) > - Repackaged cglib, asm & guava classes are now hidden from IDE auto-imports > - Source can be built with Maven > - General extension & SPI improvements: > - [Extensions SPI](http://code.google.com/p/google-guice/wiki/ExtensionSPI), with support from the [Multibindings](http://code.google.com/p/google-guice/wiki/Multibindings), [ServletModule](http://code.google.com/p/google-guice/wiki/ServletModule) and [AssistedInject](http://code.google.com/p/google-guice/wiki/AssistedInject) extensions. > - `@Toolable`, for use by extensions in Stage.TOOL > - All binding implementations implement HasDependencies > - Scope improvements: > - Scopes.`isSingleton` > - `toInstance` bindings are considered eager singletons in the Scope SPI > - Singleton providers that return `null` are now scoped properly. > - Fail when circularly dependent singletons cannot be proxied (previously two instances may have been created) > - Provider Method (`@Provides`) improvements: > - Logger dependencies now use named instead of anonymous loggers > - Exceptions produce a simpler stack > - Private Modules improvements: > - If a single PrivateModule is passed to Modules.override, private elements can be overridden. > - If many modules are passed to Modules.override, exposed keys can be overridden. > - Multibinder & MapBinder extension improvements: > - `permitDuplicates` — allows MapBinder to inject a `Map`> and a `Map`> and Multibinder to silently ignore duplicate entries > - Expose dependencies in Stage.TOOL, and return a dependency on Injector (instead of `null`) when working with Elements. > - Co-exist nicely with Modules.override > - Work properly with marker (parameterless) annotations > - Expose details through the new extensions SPI > - Servlet extension improvements: > - Added `with(instance)` for servlet bindings. > - Support multiple injectors using [ServletModule](http://code.google.com/p/google-guice/wiki/ServletModule) in the same JVM. > - Support thread-continuations (allow background threads to process an HttpRequest) > - Support manually seeding a `@RequestScope` > - Expose details through new extensions SPI > - Fix request forwarding > - Performance improvements for the filter & servlet pipelines > - Expose the servlet context (ServletModule.`getServletContext`) > - Fixed so a single [ServletModule](http://code.google.com/p/google-guice/wiki/ServletModule) instance can be used twice (in, say Element.`getElements` & creating an Injector) > - Fix to work with context paths > - [AssistedInject](http://code.google.com/p/google-guice/wiki/AssistedInject) extension improvements > - New FactoryModuleBuilder for building assisted factories > - Injection is done through child injectors and can participate in AOP > - Performance improvements > - Multiple different implementations can be created from a single factory > - Incorrect implementations or factories are detected in Stage.TOOL, and more error-checking with better error messages > - Work better with parameterized types > - Expose details through new extensions SPI > - [ThrowingProviders](http://code.google.com/p/google-guice/wiki/ThrowingProviders) extension improvements > - Added a new CheckedProviders interface that allows more than one exception to be thrown. > - Added `@CheckedProvides` allowing `@Provides`-like syntax for CheckedProviders. > - Dependencies are checked at Injector-creation time and during Stage.TOOL, so they can fail early > - Bindings created by ThrowingProviderBinder now return proper dependencies instead of Injector. > - [Struts2](http://code.google.com/p/google-guice/wiki/Struts2Integration) > - The Struts2 extension now works again! (It worked in Guice 1.0 and was somewhat broken in Guice 2.0) > - Added to Injector: `getAllBindings`, `getExistingBinding`, `getScopeBindings`, `getTypeConverterBindings`. > - Added to Key: `hasAttributes`, `ofType`, `withoutAttributes` > - Various bug fixes / improvements: > - Prevent child injectors from rebinding a parent just-in-time binding. > - Non-intercepted methods in a class with other intercepted methods no longer go through cglib (reducing total stack frames). > - Allow Guice to work on generated classes. > - Fix calling `Provider.get()` of an unrelated Provider in a scoping method. > - MoreTypes.`getRawTypes` returns the proper types for arrays (instead of `Object`.class) > - JIT bindings left in a parent injector when child injectors fail creating a JIT binding are now removed > - Overriding an `@Inject` method (if the subclass also annotates the method with `@Inject`) no longer injects the method twice > - You can now bind byte constants (using `ConstantBindingBuilder.to(byte)`) > - Better exceptions when trying to intercept final classes, using keys already bound in child or private module, and many other cases. > - ConvertedConstantBinding now exposes the TypeConverterBinding used to convert the constant. 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