java-tutorials/libraries-3/src/main/java/com/baeldung/takes/TakesApp.java

package com.baeldung.takes;

import java.io.IOException;
import java.sql.Connection;
import java.sql.SQLException;

import org.takes.Response;
import org.takes.facets.fallback.Fallback;
import org.takes.facets.fallback.FbChain;
import org.takes.facets.fallback.FbStatus;
import org.takes.facets.fallback.RqFallback;
import org.takes.facets.fallback.TkFallback;
import org.takes.facets.fork.FkRegex;
import org.takes.facets.fork.TkFork;
import org.takes.http.Exit;
import org.takes.http.FtBasic;
import org.takes.misc.Opt;
import org.takes.rs.RsText;
import org.takes.tk.TkSlf4j;

import com.zaxxer.hikari.HikariConfig;
import com.zaxxer.hikari.HikariDataSource;

public final class TakesApp {

    public static void main(final String... args) throws IOException, SQLException {
        new FtBasic(
            new TkFallback(
                new TkSlf4j(
                    new TkFork(
                        new FkRegex("/", "Hello, World!"),
                        new FkRegex("/index", new TakesIndex()),
                        new FkRegex("/contact", new TakesContact()),
                        new FkRegex("/createUser", new TakesCreateUser(TakesApp.dbConnection())),
                        new FkRegex("\\A/readUser", new TakesReadUser(TakesApp.dbConnection()))
                        )
                    ),
                new FbChain(
                    new FbStatus(404, new RsText("sorry, page is absent")),
                    new FbStatus(405, new RsText("this method is not allowed here")),
                    new Fallback() {
                        @Override
                        public Opt<Response> route(final RqFallback req) {
                            return new Opt.Single<Response>(
                                new RsText(req.throwable().getMessage())
                                );
                        }
                    })
                ),
            6060
            ).start(Exit.NEVER);
    }

    private static Connection dbConnection() throws SQLException {
        HikariConfig config = new HikariConfig();

        config.setJdbcUrl("jdbc:h2:mem:devDB;DB_CLOSE_DELAY=-1;INIT=runscript from 'classpath:/db.sql'");
        config.setUsername("sa");
        config.setPassword("");

        @SuppressWarnings("resource")
        HikariDataSource ds = new HikariDataSource(config);

        return ds.getConnection();
    }

}