/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.flink.api.java.io.jdbc;
import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
import org.junit.Assert;
import org.apache.flink.api.java.tuple.Tuple2;
import org.apache.flink.api.java.tuple.Tuple5;
import org.junit.After;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;
public class JDBCInputFormatTest {
JDBCInputFormat jdbcInputFormat;
static Connection conn;
static final Object[][] dbData = {
{1001, ("Java for dummies"), ("Tan Ah Teck"), 11.11, 11},
{1002, ("More Java for dummies"), ("Tan Ah Teck"), 22.22, 22},
{1003, ("More Java for more dummies"), ("Mohammad Ali"), 33.33, 33},
{1004, ("A Cup of Java"), ("Kumar"), 44.44, 44},
{1005, ("A Teaspoon of Java"), ("Kevin Jones"), 55.55, 55}};
@BeforeClass
public static void setUpClass() {
try {
prepareDerbyDatabase();
} catch (Exception e) {
Assert.fail();
}
}
private static void prepareDerbyDatabase() throws ClassNotFoundException, SQLException {
System.setProperty("derby.stream.error.field", "org.apache.flink.api.java.record.io.jdbc.DevNullLogStream.DEV_NULL");
String dbURL = "jdbc:derby:memory:ebookshop;create=true";
Class.forName("org.apache.derby.jdbc.EmbeddedDriver");
conn = DriverManager.getConnection(dbURL);
createTable();
insertDataToSQLTable();
conn.close();
}
private static void createTable() throws SQLException {
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();
}
private static void insertDataToSQLTable() throws SQLException {
StringBuilder 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)");
Statement stat = conn.createStatement();
stat.execute(sqlQueryBuilder.toString());
stat.close();
}
@AfterClass
public static void tearDownClass() {
cleanUpDerbyDatabases();
}
private static void cleanUpDerbyDatabases() {
try {
String dbURL = "jdbc:derby:memory:ebookshop;create=true";
Class.forName("org.apache.derby.jdbc.EmbeddedDriver");
conn = DriverManager.getConnection(dbURL);
Statement stat = conn.createStatement();
stat.executeUpdate("DROP TABLE books");
stat.close();
conn.close();
} catch (Exception e) {
e.printStackTrace();
Assert.fail();
}
}
@After
public void tearDown() {
jdbcInputFormat = null;
}
@Test(expected = IllegalArgumentException.class)
public void testInvalidDriver() throws IOException {
jdbcInputFormat = JDBCInputFormat.buildJDBCInputFormat()
.setDrivername("org.apache.derby.jdbc.idontexist")
.setDBUrl("jdbc:derby:memory:ebookshop")
.setQuery("select * from books")
.finish();
jdbcInputFormat.open(null);
}
@Test(expected = IllegalArgumentException.class)
public void testInvalidURL() throws IOException {
jdbcInputFormat = JDBCInputFormat.buildJDBCInputFormat()
.setDrivername("org.apache.derby.jdbc.EmbeddedDriver")
.setDBUrl("jdbc:der:iamanerror:mory:ebookshop")
.setQuery("select * from books")
.finish();
jdbcInputFormat.open(null);
}
@Test(expected = IllegalArgumentException.class)
public void testInvalidQuery() throws IOException {
jdbcInputFormat = JDBCInputFormat.buildJDBCInputFormat()
.setDrivername("org.apache.derby.jdbc.EmbeddedDriver")
.setDBUrl("jdbc:derby:memory:ebookshop")
.setQuery("iamnotsql")
.finish();
jdbcInputFormat.open(null);
}
@Test(expected = IllegalArgumentException.class)
public void testIncompleteConfiguration() throws IOException {
jdbcInputFormat = JDBCInputFormat.buildJDBCInputFormat()
.setDrivername("org.apache.derby.jdbc.EmbeddedDriver")
.setQuery("select * from books")
.finish();
}
@Test(expected = IOException.class)
public void testIncompatibleTuple() throws IOException {
jdbcInputFormat = JDBCInputFormat.buildJDBCInputFormat()
.setDrivername("org.apache.derby.jdbc.EmbeddedDriver")
.setDBUrl("jdbc:derby:memory:ebookshop")
.setQuery("select * from books")
.finish();
jdbcInputFormat.open(null);
jdbcInputFormat.nextRecord(new Tuple2());
}
@Test
public void testJDBCInputFormat() throws IOException {
jdbcInputFormat = JDBCInputFormat.buildJDBCInputFormat()
.setDrivername("org.apache.derby.jdbc.EmbeddedDriver")
.setDBUrl("jdbc:derby:memory:ebookshop")
.setQuery("select * from books")
.finish();
jdbcInputFormat.open(null);
Tuple5 tuple = new Tuple5();
int recordCount = 0;
while (!jdbcInputFormat.reachedEnd()) {
jdbcInputFormat.nextRecord(tuple);
Assert.assertEquals("Field 0 should be int", Integer.class, tuple.getField(0).getClass());
Assert.assertEquals("Field 1 should be String", String.class, tuple.getField(1).getClass());
Assert.assertEquals("Field 2 should be String", String.class, tuple.getField(2).getClass());
Assert.assertEquals("Field 3 should be float", Double.class, tuple.getField(3).getClass());
Assert.assertEquals("Field 4 should be int", Integer.class, tuple.getField(4).getClass());
for (int x = 0; x < 5; x++) {
Assert.assertEquals(dbData[recordCount][x], tuple.getField(x));
}
recordCount++;
}
Assert.assertEquals(5, recordCount);
}
}