LocalDate injection with Producer method. this is useful for unit test.

ConfigProducer.java

package producer;

import java.io.BufferedInputStream;
import java.io.IOException;
import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.util.Properties;

import javax.annotation.PostConstruct;
import javax.enterprise.context.ApplicationScoped;
import javax.enterprise.inject.Produces;
import javax.enterprise.inject.spi.InjectionPoint;

/**
  reference : p.96,"パーフェクトJavaEE"
*/
@ApplicationScoped
public class ConfigProducer {

    private Properties props;

    @PostConstruct
    public void init() {
        try (BufferedInputStream bis =
                new BufferedInputStream(
                        this.getClass().getClassLoader().getResourceAsStream("config.properties"))) {
            this.props = new Properties();
            this.props.load(bis);
        } catch (IOException e) {
            System.err.println(e);
        }
    }

    @Produces
    @Config
    public LocalDate getLocalDateConfig(InjectionPoint ip) {
        String key = ip.getAnnotated().getAnnotation(Config.class).value();
        String value = props.getProperty(key);
        if (value.equals("now")) {
            return LocalDate.now();
        } else {
            return LocalDate.parse(value,DateTimeFormatter.ofPattern("yyyy-LLLL-dd"));
        }
    }
}