Java ServiceLoader instantiation with parameters

[onyx crystal]

afaik ServiceLoader creates the class instance with default empty constructor, is there a way to make it use constructor with parameters?

[main schooner]

<@&987246399047479336> please have a look, thanks.

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TJ-Bot

Afaik ServiceLoader creates the class instance with default empty constructor, is there a way to make it use constructor with parameters?

Yes, you can achieve this by implementing a custom provider interface and using a custom ServiceLoader implementation.

First, define your custom provider interface with the necessary parameters in the constructor:

public interface MyServiceProvider {
    void myMethod();
}

Next, implement your custom provider class that implements the custom provider interface:

public class MyServiceProviderImpl implements MyServiceProvider {
    private String parameter;

    public MyServiceProviderImpl(String parameter) {
        this.parameter = parameter;
    }

    @Override
    public void myMethod() {
        // Implementation here
    }
}

Then, create a custom ServiceLoader implementation that instantiates the provider classes with parameters in the constructor:

public class CustomServiceLoader {
    public static <S> S load(Class<S> service, String parameter) {
        ServiceLoader<S> loader = ServiceLoader.load(service);
        for (S provider : loader) {
            if (provider instanceof MyServiceProviderImpl) {
                ((MyServiceProviderImpl) provider).setParameter(parameter);
            }
            return provider;
        }
        return null;
    }
}

Finally, use the CustomServiceLoader to load your providers with parameters in the constructor:

MyServiceProvider provider = CustomServiceLoader.load(MyServiceProvider.class, "parameterValue");
provider.myMethod();

With this approach, you can instantiate classes with parameters using ServiceLoader in Java.

- AI generated response

[tiny sail]

yes

but you need to make a static provider() method

which itself cannot take arguments

hence why ThingFactory is more common to make a service provider interface than Thing