如何在Micronaut cli应用程序中注入bean和创建自定义bean

Question

@command(name = "com/utils", description = "..",
mixinStandardHelpOptions = true, header = {..})
public class UtilityCommand implements Runnable {

@Inject
SomeBean somebean;

public void run() {
somebean.method1();
}
}

# Now I want to create Singleton bean using below syntax #

@Singleton
public class SomeBean {

 @Inject RxHttpClient client;

 void method1(){
client.exchange(); // Rest call goes here
}

}

@Factory公共类MyFactory{

 @Bean
 public SomeBean myBean() {
     new SomeBean();
 }

}

用于检查详细输出##的简单测试案例

public class UtilityCommandTest {

@test
public void testWithCommandLineOption() throws Exception {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
System.setOut(new PrintStream(baos));

try (ApplicationContext ctx = ApplicationContext.run(Environment.CLI, Environment.TEST)) {
    **ctx.registerSingleton(SomeBean.class,true);**
    String[] args = new String[] { "-v"};
    PicocliRunner.run(UtilityCommand.class, ctx, args);
    assertTrue(baos.toString(), baos.toString().contains("Hi!"));
}
}

picocli.CommandLine$InitializationException：无法实例化类Com.UtilityCommand：IO.Micronaut.Context.Exceptions.DependencyInjectionException：无法为类Com.UtilityCommand的字段[someBean]注入值

采取的路径：UtilityCommand.SomeBean

Answer 1

是否尝试使用@requires注释？

command(name = "com/utils", description = "..",
mixinStandardHelpOptions = true, header = {..})
@Requires(beans = SomeBean.class)
public class UtilityCommand implements Runnable {

  @Inject
  SomeBean somebean;

  public void run() {
    somebean.method1();
  }
}

Answer 2

我也遇到了，我注意到我在main中使用了Picocli runner

public static void main(String[] args) {
new CommandLine(commandObject).execute(args);
}

我换了Micronaut的PicocliRunner，它起作用了

public static void main(String[] args) {
PicocliRunner.run(commandObject.class,args);
}

还有，我看到了这个例子