dject's Introduction

Dject ·

Guice extensions, help to improve the developer experience of guice.

Design Principles

Keep the core small and scalable, and provide rich extensions arround the core.

Lifecycle support

You can use @PostConstruct and @PreDestroy on the method.

public class PostConstructTest {
    @PostConstruct
    public void postConstruct() {
        // More code here 
    }
    
    @PreDestroy
    public void PreDestroy() {
        // More code here 
    }
}

You can also implements LifecycleListener.

public class ListenerTest implements LifecycleListener {

    @Override
    public void onStarted() {
        // More code here
    }

    @Override
    public void onStopped(Throwable error) {
        // More code here
    }
}

@PostConstruct excute at guice object provision time, LifecycleListener.onStarted excute when create guice injecter finished. @PostConstruct will fail fast at guice provision time.
LifecycleListener.onStopped excuted before @PreDestroy when object destroyed.

Be Carefull
Any Error(but not Exception) from the lifecycle method will stop executing more lifecycle methods directly. Which means LifecycleListener.onStopped and @PreDestroy will not be excuted if any destroy lifecycle method before throws Error.

Usage

User builder pattern to start up Dject.

public class DjectTest {
    @Test
    public void testStartUp() {
        Dject.newBuilder().withModule(
                new AbstractModule() {
                    @Override
                    protected void configure() {
                        bind(String.class).toInstance("Hello world");
                    }
                })
                .build();
    }
}

If you do not want to abort main thread， call awaitShutdown() after Dject build.

public class DjectTest {
    @Test
    public void testAwaitShutdown() {
        Dject.newBuilder().withModule(
                new AbstractModule() {
                    @Override
                    protected void configure() {
                        bind(String.class).toInstance("Hello world");
                    }
                })
                .build().awaitShutdown();
    }
}