Java tutorial
/** * 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 com.cloudera.sqoop.manager; import java.io.BufferedReader; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStreamReader; import java.sql.Connection; import java.sql.SQLException; import java.sql.Statement; import java.util.ArrayList; import java.util.Arrays; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.apache.hadoop.conf.Configuration; import org.apache.hadoop.fs.Path; import org.apache.hadoop.io.IOUtils; import org.apache.sqoop.manager.CubridManager; import org.apache.sqoop.manager.cubrid.CubridTestUtils; import org.apache.sqoop.util.FileListing; import org.junit.After; import org.junit.Before; import org.junit.Test; import com.cloudera.sqoop.SqoopOptions; import com.cloudera.sqoop.testutil.CommonArgs; import com.cloudera.sqoop.testutil.ImportJobTestCase; /** * Test the CubridManager implementation. * * This uses JDBC to import data from an Cubrid database into HDFS. * * Since this requires an Cubrid installation, this class is named in such a way * that Sqoop's default QA process does not run it. You need to run this * manually with -Dtestcase=CubridManagerImportTest. * * You need to put Cubrid JDBC driver library (JDBC-9.2.2.0003-cubrid.jar) in a * location where Sqoop will be able to access it (since this library cannot be * checked into Apache's tree for licensing reasons). * * To set up your test environment: * Install Cubrid 9.2.2 * ref:http://www.cubrid.org/wiki_tutorials/entry/installing-cubrid-on-linux-using-shell-and-rpm * Create a database SQOOPCUBRIDTEST * $cubrid createdb SQOOPCUBRIDTEST en_us.utf8 * Start cubrid and database * $cubrid service start * $cubrid server start SQOOPCUBRIDTEST * Create a login SQOOPUSER with password PASSWORD and grant all * $csql -u dba SQOOPCUBRIDTEST * csql>CREATE USER SQOOPUSER password 'PASSWORD'; */ public class CubridManagerImportTest extends ImportJobTestCase { public static final Log LOG = LogFactory.getLog(CubridManagerImportTest.class.getName()); static final String TABLE_NAME = "employees_cubrid"; static final String NULL_TABLE_NAME = "null_employees_cubrid"; // instance variables populated during setUp, used during tests private CubridManager manager; private Configuration conf = new Configuration(); @Override protected Configuration getConf() { return conf; } @Override protected boolean useHsqldbTestServer() { return false; } @Before public void setUp() { super.setUp(); LOG.debug("Setting up another CubridImport test: " + CubridTestUtils.getConnectString()); setUpData(TABLE_NAME, false); setUpData(NULL_TABLE_NAME, true); LOG.debug("setUp complete."); } public void setUpData(String tableName, boolean nullEntry) { SqoopOptions options = new SqoopOptions(CubridTestUtils.getConnectString(), tableName); options.setUsername(CubridTestUtils.getCurrentUser()); options.setPassword(CubridTestUtils.getPassword()); LOG.debug("Setting up another CubridImport test: " + CubridTestUtils.getConnectString()); manager = new CubridManager(options); Connection connection = null; Statement st = null; try { connection = manager.getConnection(); connection.setAutoCommit(false); st = connection.createStatement(); // create the database table and populate it with data. st.executeUpdate("DROP TABLE IF EXISTS " + tableName); st.executeUpdate("CREATE TABLE " + tableName + " (" + manager.escapeColName("id") + " INT NOT NULL PRIMARY KEY, " + manager.escapeColName("name") + " VARCHAR(24) NOT NULL, " + manager.escapeColName("start_date") + " DATE, " + manager.escapeColName("Salary") + " FLOAT, " + manager.escapeColName("dept") + " VARCHAR(32));"); st.executeUpdate( "INSERT INTO " + tableName + " VALUES(1,'Aaron','2009-05-14'," + "1000000.00,'engineering');"); st.executeUpdate("INSERT INTO " + tableName + " VALUES(2,'Bob','2009-04-20',400.00,'sales');"); st.executeUpdate("INSERT INTO " + tableName + " VALUES(3,'Fred','2009-01-23'," + "15.00,'marketing');"); if (nullEntry) { st.executeUpdate("INSERT INTO " + tableName + " VALUES(4,'Mike',NULL,NULL,NULL);"); } connection.commit(); } catch (SQLException sqlE) { LOG.error("Encountered SQL Exception: " + sqlE); sqlE.printStackTrace(); fail("SQLException when running test setUp(): " + sqlE); } finally { try { if (null != st) { st.close(); } if (null != connection) { connection.close(); } } catch (SQLException sqlE) { LOG.warn("Got SQLException when closing connection: " + sqlE); } } } @After public void tearDown() { super.tearDown(); try { manager.close(); } catch (SQLException sqlE) { LOG.error("Got SQLException: " + sqlE.toString()); fail("Got SQLException: " + sqlE.toString()); } } @Test public void testImportSimple() throws IOException { String[] expectedResults = { "1,Aaron,2009-05-14,1000000.0,engineering", "2,Bob,2009-04-20,400.0,sales", "3,Fred,2009-01-23,15.0,marketing", }; doImportAndVerify(TABLE_NAME, expectedResults); } @Test public void testListTables() throws IOException { SqoopOptions options = new SqoopOptions(new Configuration()); options.setConnectString(CubridTestUtils.getConnectString()); options.setUsername(CubridTestUtils.getCurrentUser()); options.setPassword(CubridTestUtils.getPassword()); ConnManager mgr = new CubridManager(options); String[] tables = mgr.listTables(); Arrays.sort(tables); assertTrue(TABLE_NAME + " is not found!", Arrays.binarySearch(tables, TABLE_NAME) >= 0); } @Test public void testNullEscapeCharacters() throws Exception { String[] expectedResults = { "1,Aaron,2009-05-14,1000000.0,engineering", "2,Bob,2009-04-20,400.0,sales", "3,Fred,2009-01-23,15.0,marketing", "4,Mike,cubrid,cubrid,cubrid", }; String[] extraArgs = { "--null-string", "cubrid", "--null-non-string", "cubrid", }; doImportAndVerify(NULL_TABLE_NAME, expectedResults, extraArgs); } private void doImportAndVerify(String tableName, String[] expectedResults, String... extraArgs) throws IOException { Path warehousePath = new Path(this.getWarehouseDir()); Path tablePath = new Path(warehousePath, tableName); Path filePath = new Path(tablePath, "part-m-00000"); File tableFile = new File(tablePath.toString()); if (tableFile.exists() && tableFile.isDirectory()) { // remove the directory before running the import. FileListing.recursiveDeleteDir(tableFile); } String[] argv = getArgv(tableName, extraArgs); try { runImport(argv); } catch (IOException ioe) { LOG.error("Got IOException during import: " + ioe.toString()); ioe.printStackTrace(); fail(ioe.toString()); } File f = new File(filePath.toString()); assertTrue("Could not find imported data file", f.exists()); BufferedReader r = null; try { // Read through the file and make sure it's all there. r = new BufferedReader(new InputStreamReader(new FileInputStream(f))); for (String expectedLine : expectedResults) { assertEquals(expectedLine, r.readLine()); } } catch (IOException ioe) { LOG.error("Got IOException verifying results: " + ioe.toString()); ioe.printStackTrace(); fail(ioe.toString()); } finally { IOUtils.closeStream(r); } } private String[] getArgv(String tableName, String... extraArgs) { ArrayList<String> args = new ArrayList<String>(); CommonArgs.addHadoopFlags(args); args.add("--table"); args.add(tableName); args.add("--warehouse-dir"); args.add(getWarehouseDir()); args.add("--connect"); args.add(CubridTestUtils.getConnectString()); args.add("--username"); args.add(CubridTestUtils.getCurrentUser()); args.add("--password"); args.add(CubridTestUtils.getPassword()); args.add("--num-mappers"); args.add("1"); if (extraArgs.length > 0) { for (String arg : extraArgs) { args.add(arg); } } return args.toArray(new String[0]); } }