se.fortnox.reactivewizard.db.DbProxyFactory Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of reactivewizard-dao Show documentation

There is a newer version: 24.6.0

package se.fortnox.reactivewizard.db;

import com.google.inject.Binder;
import com.google.inject.Provider;
import com.google.inject.Scopes;
import jakarta.inject.Inject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import se.fortnox.reactivewizard.binding.AutoBindModule;
import se.fortnox.reactivewizard.binding.scanners.DaoClassScanner;

import java.lang.reflect.Method;
import java.lang.reflect.Parameter;

public class DbProxyFactory implements AutoBindModule {
    private static Logger LOG = LoggerFactory.getLogger(DbProxyFactory.class);
    private final DaoClassScanner daoClassScanner;

    @Inject
    public DbProxyFactory(DaoClassScanner daoClassScanner) {
        this.daoClassScanner = daoClassScanner;
    }

    private  Provider provider(Class iface, Provider dbProxyProvider) {
        return () -> dbProxyProvider.get().create(iface);
    }

    @SuppressWarnings({"unchecked", "rawtypes"})
    @Override
    public void configure(Binder binder) {
        Provider dbProxyProvider = binder.getProvider(DbProxy.class);
        daoClassScanner.getClasses().forEach(cls -> {

            checkCompiledWithParameters(cls);

            binder.bind((Class)cls)
                .toProvider(provider(cls, dbProxyProvider))
                .in(Scopes.SINGLETON);
        });
    }

    /**
     * Checks if the -parameters flag was used to compile the dao class
     * Exists system if daoclass if found not compiled with parameters.
     *
     * @param cls the class to use when checking for parameters
     *
     */
    private void checkCompiledWithParameters(Class cls) {

        for (Method method : cls.getMethods()) {
            if (method.getParameterCount() > 0) {

                Parameter firstParameter = method.getParameters()[0];

                if (!firstParameter.isNamePresent()) {
                    System.err.println("The project was not compiled with the -parameters option which is required for DAO parameter resolving. " +
                        "Please see https://github.com/FortnoxAB/reactive-wizard/wiki/CompilerParameters for more information.");
                    System.exit(1);
                }
            }
        }
    }
}