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 org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.apache.hadoop.fs.Path; import org.apache.hadoop.io.IOUtils; 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; import com.cloudera.sqoop.util.FileListing; /** * Test the DB2Manager implementation. * * This uses JDBC to import data from an DB2 database into HDFS. * * Since this requires an DB2 SErver 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=DB2ManagerImportManualTest * * You need to put DB2 JDBC driver library (db2jcc4.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 DB2 Express 9.7 C server. * Create a database SQOOP * Create a login SQOOP with password PASSWORD and grant all * access for database SQOOP to user SQOOP. */ public class DB2ManagerImportManualTest extends ImportJobTestCase { public static final Log LOG = LogFactory.getLog(DB2ManagerImportManualTest.class.getName()); static final String HOST_URL = System.getProperty("sqoop.test.db2.connectstring.host_url", "jdbc:db2://db2host:50000"); static final String DATABASE_NAME = "SQOOP"; static final String DATABASE_USER = "SQOOP"; static final String DATABASE_PASSWORD = "PASSWORD"; static final String TABLE_NAME = "EMPLOYEES_DB2"; static final String QUALIFIED_TABLE_NAME = "PREFIX.EMPLOYEES_DB2"; static final String CONNECT_STRING = HOST_URL + "/" + DATABASE_NAME + ":currentSchema=" + DATABASE_USER + ";"; // instance variables populated during setUp, used during tests private Db2Manager manager; private boolean useQualifiedTableName; private boolean useDefaultConnectManager; @Override protected boolean useHsqldbTestServer() { return false; } @Override protected String getTableName() { return useQualifiedTableName ? QUALIFIED_TABLE_NAME : TABLE_NAME; } @Before public void setUp() { super.setUp(); SqoopOptions options = new SqoopOptions(CONNECT_STRING, getTableName()); options.setUsername(DATABASE_USER); options.setPassword(DATABASE_PASSWORD); manager = new Db2Manager(options); // Drop the existing table, if there is one. Connection conn = null; Statement stmt = null; try { conn = manager.getConnection(); stmt = conn.createStatement(); stmt.execute("DROP TABLE " + getTableName()); } catch (SQLException sqlE) { LOG.info("Table was not dropped: " + sqlE.getMessage()); } finally { try { if (null != stmt) { stmt.close(); } } catch (Exception ex) { LOG.warn("Exception while closing stmt", ex); } } // Create and populate table try { conn = manager.getConnection(); conn.setAutoCommit(false); stmt = conn.createStatement(); // create the database table and populate it with data. stmt.executeUpdate( "CREATE TABLE " + getTableName() + " (" + "id INT NOT NULL, " + "name VARCHAR(24) NOT NULL, " + "salary FLOAT, " + "dept VARCHAR(32), " + "PRIMARY KEY (id))"); stmt.executeUpdate( "INSERT INTO " + getTableName() + " VALUES(" + "1,'Aaron', " + "1000000.00,'engineering')"); stmt.executeUpdate("INSERT INTO " + getTableName() + " VALUES(" + "2,'Bob', " + "400.00,'sales')"); stmt.executeUpdate("INSERT INTO " + getTableName() + " VALUES(" + "3,'Fred', 15.00," + "'marketing')"); conn.commit(); } catch (SQLException sqlE) { LOG.error("Encountered SQL Exception: ", sqlE); sqlE.printStackTrace(); fail("SQLException when running test setUp(): " + sqlE); } finally { try { if (null != stmt) { stmt.close(); } } catch (Exception ex) { LOG.warn("Exception while closing connection/stmt", ex); } } } @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 testDb2Import() throws IOException { useQualifiedTableName = false; // Verify that GenericJdbcManager works. useDefaultConnectManager = true; runDb2Test(getExpectedResults()); // Verify that Db2Manager works. useDefaultConnectManager = false; runDb2Test(getExpectedResults()); } @Test public void testDb2ImportQualifiedTableName() throws IOException { useQualifiedTableName = true; // Verify that GenericJdbcManager works. useDefaultConnectManager = true; runDb2Test(getExpectedResults()); // Verify that Db2Manager works. useDefaultConnectManager = false; runDb2Test(getExpectedResults()); } private String[] getExpectedResults() { return new String[] { "1,Aaron,1000000.0,engineering", "2,Bob,400.0,sales", "3,Fred,15.0,marketing", }; } private String[] getArgv() { ArrayList<String> args = new ArrayList<String>(); CommonArgs.addHadoopFlags(args); args.add("--table"); args.add(getTableName()); args.add("--warehouse-dir"); args.add(getWarehouseDir()); args.add("--connect"); args.add(CONNECT_STRING); args.add("--username"); args.add(DATABASE_USER); args.add("--password"); args.add(DATABASE_PASSWORD); args.add("--num-mappers"); args.add("1"); if (useDefaultConnectManager) { // Specifying the driver class forces DefaultManagerFactory // to instantiate GenericJdbcManager. args.add("--driver"); args.add("com.ibm.db2.jcc.DB2Driver"); } return args.toArray(new String[0]); } private void runDb2Test(String[] expectedResults) throws IOException { Path warehousePath = new Path(this.getWarehouseDir()); Path tablePath = new Path(warehousePath, getTableName()); 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(); 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); } } }