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* Licensed to the Apache Software Foundation (ASF) under one
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* 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.
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package org.apache.pig.piggybank.test.storage;
import java.io.File;
import java.io.FileWriter;
import java.io.FilenameFilter;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.sql.Date;
import java.util.List;
import org.apache.pig.ExecType;
import org.apache.pig.PigServer;
import org.apache.pig.backend.executionengine.ExecException;
import org.apache.pig.backend.executionengine.ExecJob;
import org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MRConfiguration;
import org.apache.pig.test.MiniCluster;
import org.apache.pig.test.Util;
import org.hsqldb.Server;
import org.junit.After;
import org.junit.Before;
import junit.framework.TestCase;
public class TestDBStorage extends TestCase {
private PigServer pigServer;
private MiniCluster cluster;
private Server dbServer;
private String driver = "org.hsqldb.jdbcDriver";
// private String url = "jdbc:hsqldb:mem:.";
private String TMP_DIR;
private String dblocation;
private String url;
private String dbUrl = "jdbc:hsqldb:hsql://localhost/" + "batchtest";
private String user = "sa";
private String password = "";
private static final String INPUT_FILE = "datafile.txt";
public TestDBStorage() throws ExecException, IOException {
// Initialise Pig server
cluster = MiniCluster.buildCluster();
pigServer = new PigServer(ExecType.MAPREDUCE, cluster.getProperties());
pigServer.getPigContext().getProperties()
.setProperty(MRConfiguration.MAP_MAX_ATTEMPTS, "1");
pigServer.getPigContext().getProperties()
.setProperty(MRConfiguration.REDUCE_MAX_ATTEMPTS, "1");
System.out.println("Pig server initialized successfully");
TMP_DIR = System.getProperty("user.dir") + "/build/test/";
dblocation = TMP_DIR + "batchtest";
url = "jdbc:hsqldb:file:" + dblocation
+ ";hsqldb.default_table_type=cached;hsqldb.cache_rows=100";
// Initialise DBServer
dbServer = new Server();
dbServer.setDatabaseName(0, "batchtest");
// dbServer.setDatabasePath(0, "mem:test;sql.enforce_strict_size=true");
dbServer.setDatabasePath(0,
"file:" + TMP_DIR + "batchtest;sql.enforce_strict_size=true");
dbServer.setLogWriter(null);
dbServer.setErrWriter(null);
dbServer.start();
System.out.println("Database URL: " + dbUrl);
try {
Class.forName(driver);
} catch (Exception e) {
e.printStackTrace();
System.out.println(this + ".setUp() error: " + e.getMessage());
}
System.out.println("Database server started on port: " + dbServer.getPort());
}
private void createFile() throws IOException {
PrintWriter w = new PrintWriter(new FileWriter(INPUT_FILE));
w = new PrintWriter(new FileWriter(INPUT_FILE));
w.println("100\tapple\t1.0\t2008-01-01");
w.println("100\torange\t2.0\t2008-02-01");
w.println("100\tbanana\t1.1\t2008-03-01");
w.println("\t\t\t");
w.close();
Util.copyFromLocalToCluster(cluster, INPUT_FILE, INPUT_FILE);
}
private void createTable() throws IOException {
Connection con = null;
String sql = "create table ttt (id integer, name varchar(32), ratio double, dt date)";
try {
con = DriverManager.getConnection(url, user, password);
} catch (SQLException sqe) {
throw new IOException("Unable to obtain a connection to the database",
sqe);
}
try {
Statement st = con.createStatement();
st.executeUpdate(sql);
st.close();
con.commit();
con.close();
} catch (SQLException sqe) {
throw new IOException("Cannot create table", sqe);
}
}
@Before
public void setUp() throws IOException {
createFile();
createTable();
}
@After
public void tearDown() throws IOException {
new File(INPUT_FILE).delete();
Util.deleteFile(cluster, INPUT_FILE);
pigServer.shutdown();
dbServer.stop();
cluster.shutDown();
File[] dbFiles = new File(TMP_DIR).listFiles(new FilenameFilter() {
@Override
public boolean accept(File dir, String name) {
if (name.startsWith("batchtest")) {
return true;
} else {
return false;
}
}
});
if (dbFiles != null) {
for (File file : dbFiles) {
file.delete();
}
}
}
public void testWriteToDB() throws IOException {
String insertQuery = "insert into ttt (id, name, ratio, dt) values (?,?,?,?)";
pigServer.setBatchOn();
String dbStore = "org.apache.pig.piggybank.storage.DBStorage('" + driver
+ "', '" + Util.encodeEscape(url) + "', '" + insertQuery + "');";
pigServer.registerQuery("A = LOAD '" + INPUT_FILE
+ "' as (id:int, fruit:chararray, ratio:double, dt : datetime);");
pigServer.registerQuery("STORE A INTO 'dummy' USING " + dbStore);
ExecJob job = pigServer.executeBatch().get(0);
try {
while(!job.hasCompleted()) Thread.sleep(1000);
} catch(InterruptedException ie) {// ignore
}
assertNotSame("Failed: " + job.getException(), job.getStatus(),
ExecJob.JOB_STATUS.FAILED);
Connection con = null;
String selectQuery = "select id, name, ratio, dt from ttt order by name";
try {
con = DriverManager.getConnection(url, user, password);
} catch (SQLException sqe) {
throw new IOException(
"Unable to obtain database connection for data verification", sqe);
}
try {
PreparedStatement ps = con.prepareStatement(selectQuery);
ResultSet rs = ps.executeQuery();
int expId = 100;
String[] expNames = { "apple", "banana", "orange" };
double[] expRatios = { 1.0, 1.1, 2.0 };
Date [] expDates = {new Date(2008,01,01),new Date(2008,02,01),new Date(2008,03,01)};
for (int i = 0; i < 4 && rs.next(); i++) {
//Need to check for nulls explicitly.
if ( i == 0) {
//Id
rs.getInt(1);
assertTrue(rs.wasNull());
//Name
rs.getString(2);
assertTrue(rs.wasNull());
//Ratio
rs.getDouble(3);
assertTrue(rs.wasNull());
//Date
rs.getDate(4);
assertTrue(rs.wasNull());
} else {
assertEquals("Id mismatch", expId, rs.getInt(1));
assertEquals("Name mismatch", expNames[i-1], rs.getString(2));
assertEquals("Ratio mismatch", expRatios[i-1], rs.getDouble(3), 0.0001);
assertEquals("Date mismatch", expDates[i-1], rs.getDate(4));
}
}
} catch (SQLException sqe) {
throw new IOException(
"Unable to read data from database for verification", sqe);
}
}
}