Guice

Question

我必须从 EnvironmentModule[= 触发 TestDriver.startPoller() 41=] 因为 EnvironmentModule 是从 Abstractmodule 扩展而来的，所以我不确定如何在 EnvironmentModule 中注入依赖项，这是否可能？如果不是，我如何从 EnvironmentModule 触发 TestDriver.startPoller()

@Log4j2 @AllArgsConstructor(onConstructor = @__(@Inject)) public class TestDriver { private ClientTrafficCalculator clientTrafficCalculator; private TaskAllocator taskAllocator; @SneakyThrows public void startPoller() { new Thread(clientTrafficCalculator::prepareRateLimiterForAllClients).start(); new Thread(taskAllocator::processPendingRecordsInDDB).start(); log.info("All threads are started"); } }

环境模块

@Log4j2 @AllArgsConstructor(onConstructor = @__(@Inject)) public class EnvironmentModule extends AbstractModule { private TestDriver testDriver; @SneakyThrows public EnvironmentModule(final String[] args) { marketplace = System.getProperty("realm", "USTest"); final String realm = getPropOrDefault("realm", "USTest"); final String root = getPropOrDefault("root", "."); AppConfig.initialize(SERVICE_NAME, null, appConfigArgs); TestDriver.startPoller(); } @Override public void configure() { install(new TomcatContainerModule(new ServiceModule(Test))); } }

预计：

TestDriver.startPoller(); // 这很好用

当前结果

TestDriver.startPoller(); // 抛出空指针异常，因为它没有被注入并且 TestDriver 为 null

Answer 1

我想我找到了答案，我们可以做如下的事情

@Log4j2
public class TestDriver extends AbstractModule {


    @Override
    public void configure() {
        requestInjection(this);
    }

    @Inject
    public void startPoller(ClientTrafficCalculator clientTrafficCalculator,
        TaskAllocator taskAllocator, PManager pManager) {

        new Thread(pManager::name).start();
      
    }


}

我们必须安装它，安装会触发该方法

install(new TestDriver()); //trigger pollers for proxy and task allocation

谢谢 Jk

Guice - 如何在扩展抽象模块的 class 中注入依赖 - Java

Guice -How to inject dependency inside the class which is extending Abstract module - Java

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