package com.after_sunrise.cryptocurrency.cryptotrader.core;
import com.google.inject.AbstractModule;
import com.google.inject.Guice;
import com.google.inject.Inject;
import com.google.inject.Injector;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.configuration2.Configuration;
import org.apache.commons.configuration2.ImmutableConfiguration;
import java.util.*;
import java.util.function.Supplier;
/**
* @author takanori.takase
* @version 0.0.1
*/
@Slf4j
public class ServiceFactoryImpl implements ServiceFactory {
private final Injector injector;
@Inject
public ServiceFactoryImpl(Injector injector) {
this.injector = Guice.createInjector(new AbstractModule() {
@Override
protected void configure() {
Configuration c = injector.getInstance(Configuration.class);
bind(ImmutableConfiguration.class).toInstance(c);
}
});
}
@Override
public <T> List<T> load(Class<T> clazz) {
log.info("Loading service list : {}", clazz);
ServiceLoader<T> loader = ServiceLoader.load(clazz);
Iterator<T> itr = loader.iterator();
List<T> services = new ArrayList<>();
while (itr.hasNext()) {
try {
T service = itr.next();
injector.injectMembers(service);
services.add(service);
log.info("Loaded service : {}", service);
} catch (RuntimeException e) {
log.warn("Skipped service.", e);
}
}
return Collections.unmodifiableList(services);
}
@Override
public <K, T extends Supplier<K>> Map<K, T> loadMap(Class<T> clazz) {
log.info("Loading service map : {}", clazz);
ServiceLoader<T> loader = ServiceLoader.load(clazz);
Iterator<T> itr = loader.iterator();
Map<K, T> services = new LinkedHashMap<>();
while (itr.hasNext()) {
try {
T service = itr.next();
injector.injectMembers(service);
services.put(service.get(), service);
log.info("Loaded service : {} - {}", service.get(), service);
} catch (ServiceConfigurationError | RuntimeException e) {
log.warn("Skipped service.", e);
}
}
return Collections.unmodifiableMap(services);
}
}
