Create spring bean based on cmd line input - spring

Question

I want to create a bean with the values of string parameters provided in cmd line
#Configuration
public class SpringConfig {
#Bean
public DataProvider getDataProvider(String filePath, String mnhPath) throws Exception {
return new DataProvider(filePath, mnhPath);
}
}
#SpringBootApplication
public class SomeApplication implements CommandLineRunner {
#Autowired
private BeanFactory beanFactory;
public static void main(String[] args) {
SpringApplication.run(SomeApplication .class, args);
}
#Override
public void run(final String... args) throws Exception {
final CommandLineArgs arguments = new CommandLineArgs();
CmdLineParser parser = new CmdLineParser(arguments);
parser.parseArgument(args);
DataProvider dataProvider = beanFactory.getBean(DataProvider.class, arguments.one(), arguments.two());
dataProvider.doSomeOperation();
}
}
But I am getting an error
Description:
Parameter 0 of constructor in com.tomtom.display.height.HeightsDataProvider required a bean of type 'java.lang.String' that could not be found.
Action:
Consider defining a bean of type 'java.lang.String' in your configuration.
How should I correctly configure the bean?

Answer 1

It does not seem to work if you try to create a bean of the format, and attempt at retrieving it.
#Bean
public Bean myBean(String xyz){
return new Bean(xyz);
}
You could bypass this limitation by doing the following:
#Getter
#Setter
#NoArgsConstructor
public class MyBeanExample{
private String hello;
private String world;
}
#SpringBootApplication
public class DemoApplication {
#Bean
public MyBeanExample myBeanExample(){
return new MyBeanExample();
}
public static void main(String[] args) {
ApplicationContext ctx = SpringApplication.run(DemoApplication.class, args);
MyBeanExample beanWithArgs = ctx.getBean(MyBeanExample.class);
beanWithArgs.setHello(args[0]);
beanWithArgs.setWorld(args[1]);
System.out.println(beanWithArgs.getHello());
System.out.println(beanWithArgs.getWorld());
}
}
This would retrieve your #Bean myBeanExample() and then you use setters to set the parameters you need.