Package to create a custom Spring MessageSource

This package extends the AbstractMessageSource and therefore the MessageSource interface.

Dependency

Maven

<dependencies>
    <dependency>
        <groupId>io.github.alaugks</groupId>
        <artifactId>spring-messagesource-catalog</artifactId>
        <version>0.4.0</version>
    </dependency>
</dependencies>

Gradle

implementation group: 'io.github.alaugks', name: 'spring-messagesource-catalog', version: '0.4.0'

Packages that use the catalog as a base package

• spring-messagesource-xliff: MessageSource for translations from XLIFF files.
• spring-messagesource-db-example: Example custom Spring MessageSource from database

CatalogMessageSource Configuration

Options

builder(CatalogInterface catalogSource, Locale defaultLocale) (required)

• Argument CatalogInterface catalogSource: CatalogInterface
  
• Argument Locale defaultLocale: Default Locale

defaultDomain(String defaultDomain)

• If the default domain not set, the default is messages.

TransUnit Record

If the String domain argument is not set, the default is the messages domain.

TransUnit(Locale locale, String code, String value);

TransUnit(Locale locale, String code, String value, String domain);

Configuration example

MessageConfig with List of TransUnits

import io.github.alaugks.spring.messagesource.catalog.catalog.CatalogHandler;
import io.github.alaugks.spring.messagesource.catalog.records.TransUnit;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
import org.springframework.context.MessageSource;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class MessageConfig {
    
    List<TransUnit> transUnits = new ArrayList<>() {{
        // en
        add(new TransUnit(Locale.forLanguageTag("en"), "headline", "Headline"));
        add(new TransUnit(Locale.forLanguageTag("en"), "postcode", "Postcode"));
        add(new TransUnit(Locale.forLanguageTag("en"), "headline", "Payment", "payment"));
        add(new TransUnit(Locale.forLanguageTag("en"), "expiry_date", "Expiry date", "payment"));

        // en-US
        add(new TransUnit(Locale.forLanguageTag("en-US"), "postcode", "Zip code"));
        add(new TransUnit(Locale.forLanguageTag("en-US"), "expiry_date", "Expiration date", "payment"));

        // de
        add(new TransUnit(Locale.forLanguageTag("de"), "headline", "Überschrift"));
        add(new TransUnit(Locale.forLanguageTag("de"), "postcode", "Postleitzahl"));
        add(new TransUnit(Locale.forLanguageTag("de"), "headline", "Zahlung", "payment"));
        add(new TransUnit(Locale.forLanguageTag("de"), "expiry_date", "Ablaufdatum", "payment"));
    }};

    @Bean
    public MessageSource messageSource() {
        return CatalogMessageSourceBuilder
            .builder(this.transUnits, Locale.forLanguageTag("en"))
            .build();
	}
}

With custom CatalogInterface

CatalogInterface

import java.util.List;

import io.github.alaugks.spring.messagesource.catalog.catalog.AbstractCatalog;
import io.github.alaugks.spring.messagesource.catalog.catalog.Abstractcatalog;
import io.github.alaugks.spring.messagesource.catalog.records.TransUnit;

public class MyCustomCatalog extends AbstractCatalog {

	List<TransUnit> transUnits;

	@Override
	public List<TransUnit> getTransUnits() {
		return this.transUnits;
	}

	@Override
	public void build() {
		// Build a list with TransUnit from any kind of source.
		this.transUnits = new ArrayList<>() {{
			// ...
		}};
	}
}

MessageConfig

import io.github.alaugks.spring.messagesource.catalog.catalog.CatalogHandler;
import io.github.alaugks.spring.messagesource.catalog.records.TransUnit;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
import org.springframework.context.MessageSource;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class MessageConfig {
    @Bean
    public MessageSource messageSource() {
        return CatalogMessageSourceBuilder
            .builder(new MyCustomCatalog(), Locale.forLanguageTag("en"))
            .build();
	}
}

Target values

The behaviour of resolving the target value based on the code is equivalent to the ResourceBundleMessageSource or ReloadableResourceBundleMessageSource.

code	en	en-US	de	jp***
headline* messages.headline	Headline	Headline**	Überschrift	Headline
postcode* messages.postcode	Postcode	Zip code	Postleitzahl	Postcode
payment.headline	Payment	Payment**	Zahlung	Payment
payment.form.expiry_date	Expiry date	Expiration date	Ablaufdatum	Expiry date

*Default domain is messages.

**Example of a fallback from Language_Region (en-US) to Language (en). The id does not exist in en-US, so it tries to select the translation with locale en.

***There is no translation for Japanese (jp). The default locale transUnits (en) are selected.

Support

If you have questions, comments or feature requests please use the Discussions section.