/***********************************************************************************************************************
 *
 * Copyright (C) 2010-2013 by the Stratosphere project (http://stratosphere.eu)
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
 * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations under the License.
 *
 **********************************************************************************************************************/
package eu.stratosphere.api.java.io.jdbc.example;

import static eu.stratosphere.api.java.typeutils.BasicTypeInfo.DOUBLE_TYPE_INFO;
import static eu.stratosphere.api.java.typeutils.BasicTypeInfo.INT_TYPE_INFO;
import static eu.stratosphere.api.java.typeutils.BasicTypeInfo.STRING_TYPE_INFO;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;

import eu.stratosphere.api.java.DataSet;
import eu.stratosphere.api.java.ExecutionEnvironment;
import eu.stratosphere.api.java.io.jdbc.JDBCInputFormat;
import eu.stratosphere.api.java.io.jdbc.JDBCOutputFormat;
import eu.stratosphere.api.java.tuple.Tuple5;
import eu.stratosphere.api.java.typeutils.TupleTypeInfo;

public class JDBCExample {

	public static void main(String[] args) throws Exception {
		prepareTestDb();

		ExecutionEnvironment environment = ExecutionEnvironment.getExecutionEnvironment();
		DataSet<Tuple5> source
				= environment.createInput(JDBCInputFormat.buildJDBCInputFormat()
						.setDrivername("org.apache.derby.jdbc.EmbeddedDriver")
						.setDBUrl("jdbc:derby:memory:ebookshop")
						.setQuery("select * from books")
						.finish(),
						new TupleTypeInfo(Tuple5.class, INT_TYPE_INFO, STRING_TYPE_INFO, STRING_TYPE_INFO, DOUBLE_TYPE_INFO, INT_TYPE_INFO)
				);

		source.output(JDBCOutputFormat.buildJDBCOutputFormat()
				.setDrivername("org.apache.derby.jdbc.EmbeddedDriver")
				.setDBUrl("jdbc:derby:memory:ebookshop")
				.setQuery("insert into newbooks (id,title,author,price,qty) values (?,?,?,?,?)")
				.finish());
		environment.execute();
	}

	private static void prepareTestDb() throws Exception {
		String dbURL = "jdbc:derby:memory:ebookshop;create=true";
		Class.forName("org.apache.derby.jdbc.EmbeddedDriver");
		Connection conn = DriverManager.getConnection(dbURL);

		StringBuilder sqlQueryBuilder = new StringBuilder("CREATE TABLE books (");
		sqlQueryBuilder.append("id INT NOT NULL DEFAULT 0,");
		sqlQueryBuilder.append("title VARCHAR(50) DEFAULT NULL,");
		sqlQueryBuilder.append("author VARCHAR(50) DEFAULT NULL,");
		sqlQueryBuilder.append("price FLOAT DEFAULT NULL,");
		sqlQueryBuilder.append("qty INT DEFAULT NULL,");
		sqlQueryBuilder.append("PRIMARY KEY (id))");

		Statement stat = conn.createStatement();
		stat.executeUpdate(sqlQueryBuilder.toString());
		stat.close();

		sqlQueryBuilder = new StringBuilder("CREATE TABLE newbooks (");
		sqlQueryBuilder.append("id INT NOT NULL DEFAULT 0,");
		sqlQueryBuilder.append("title VARCHAR(50) DEFAULT NULL,");
		sqlQueryBuilder.append("author VARCHAR(50) DEFAULT NULL,");
		sqlQueryBuilder.append("price FLOAT DEFAULT NULL,");
		sqlQueryBuilder.append("qty INT DEFAULT NULL,");
		sqlQueryBuilder.append("PRIMARY KEY (id))");

		stat = conn.createStatement();
		stat.executeUpdate(sqlQueryBuilder.toString());
		stat.close();

		sqlQueryBuilder = new StringBuilder("INSERT INTO books (id, title, author, price, qty) VALUES ");
		sqlQueryBuilder.append("(1001, 'Java for dummies', 'Tan Ah Teck', 11.11, 11),");
		sqlQueryBuilder.append("(1002, 'More Java for dummies', 'Tan Ah Teck', 22.22, 22),");
		sqlQueryBuilder.append("(1003, 'More Java for more dummies', 'Mohammad Ali', 33.33, 33),");
		sqlQueryBuilder.append("(1004, 'A Cup of Java', 'Kumar', 44.44, 44),");
		sqlQueryBuilder.append("(1005, 'A Teaspoon of Java', 'Kevin Jones', 55.55, 55)");

		stat = conn.createStatement();
		stat.execute(sqlQueryBuilder.toString());
		stat.close();

		conn.close();
	}
}